Bryant 581C024 060 User Manual

581B036--072  
581C024--060  
SINGLE-PACKAGE ROOFTOP HEATING/COOLING  
STANDARD AND LOW NOx UNITS  
Installation Instructions  
TABLE OF CONTENTS  
literature, tags and labels attached to the unit, and other safety  
precautions that may apply.  
Page  
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . 1  
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Follow all safety codes. Wear safety glasses and work gloves. Use  
quenching cloth for unbrazing operations. Have fire extinguishers  
available for all brazing operations.  
1
Step 1--Provide Unit Support . . . . . . . . . . . . . . . . . . . . . . . 2  
ROOF CURB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
SLAB MOUNT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
ALTERNATE UNIT SUPPORT . . . . . . . . . . . . . . . . . 2  
Recognize safety information. This is the safety--alert symbol  
. When you see this symbol on the unit and in instructions or  
manuals, be alert to the potential for personal injury.  
Understand the signal words DANGER, WARNING, and  
CAUTION. These words are used with the safety--alert symbol.  
DANGER identifies the most serious hazards which will result in  
severe personal injury or death. WARNING signifies a hazard  
which could result in personal injury or death. CAUTION is used  
to identify unsafe practices which may result in minor personal  
injury or product and property damage. NOTE is used to  
highlight suggestions which will result in enhanced installation,  
reliability, or operation.  
Step 2--Field Fabricate Ductwork . . . . . . . . . . . . . . . . . . .  
2
Step 3--Install External Trap for Condensate Drain . . . . . . . 2  
Step 4--Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . . . . . 2  
POSITIONING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Step 5 — Install Flue Hood . . . . . . . . . . . . . . . . . . . . . . . . 4  
Step 6 — Install Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . 4  
Step 7 — Make Electrical Connections . . . . . . . . . . . . . . . . 8  
FIELD POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . 8  
FIELD CONTROL WIRING . . . . . . . . . . . . . . . . . . . . 8  
HEAT ANTICIPATOR SETTINGS . . . . . . . . . . . . . . . 8  
Step 8 — Adjust Factory-Installed Options . . . . . . . . . . . 16  
!
WARNING  
ELECTRICAL SHOCK HAZARD  
Failure to follow this warning could cause personal  
injury or death.  
Before performing service or maintenance operations  
on unit, turn off main power switch to unit and install  
lockout tag. Ensure electrical service to rooftop unit  
agrees with voltage and amperage listed on the unit  
rating plate.  
PERFECT HUMIDITYADAPTIVE  
DEHUMIDIFICATION SYSTEM . . . . . . . . . . . . . . 16  
MANUAL OUTDOOR-AIR DAMPER . . . . . . . . . . 16  
CONVENIENCE OUTLET . . . . . . . . . . . . . . . . . . . . 16  
OPTIONAL ECONOMI$ER IV . . . . . . . . . . . . . . . . 18  
ECONOMI$ER IV STANDARD SENSORS . . . . . . 19  
ECONOMI$ER IV CONTROL MODES . . . . . . . . . 20  
Step 9 — Adjust Evaporator-Fan Speed . . . . . . . . . . . . . . 25  
PRE--START--UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41  
START--UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41  
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45  
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55  
START--UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . 60  
!
WARNING  
FIRE, EXPLOSION HAZARD  
Failure to follow this warning could cause death and/or  
property damage.  
Disconnect gas piping from unit when leak testing at  
1
1
pressure greater than / psig. Pressures greater than /  
2
2
psig will cause gas valve damage resulting in hazardous  
condition. If gas valve is subjected to pressure greater  
1
than  
/
2
psig, it must be replaced before use. When  
pressure testing field-supplied gas piping at pressures of  
/ psig or less, a unit connected to such piping must be  
isolated by manually closing the gas valve(s).  
1
2
SAFETY CONSIDERATIONS  
Installation and servicing of air-conditioning equipment can be  
hazardous due to system pressure and electrical components.  
Only trained and qualified service personnel should install, repair,  
or service air-conditioning equipment.  
INSTALLATION  
Unit is shipped in the vertical discharge configuration. To convert  
to horizontal discharge application, remove duct opening covers.  
Using the same screws, install covers on duct openings in  
basepan of unit with insulation-side down. Seals around  
openings must be tight. (See Fig. 1.)  
Untrained personnel can perform basic maintenance functions of  
cleaning coils and filters and replacing filters. All other operations  
should be performed by trained service personnel. When working  
on air-conditioning equipment, observe precautions in the  
1
D ALT  
DRAIN  
HOLE  
ROOF CURB  
ACCESSORY  
UNIT  
SIZE  
CONNECTOR  
PKG. ACCY.  
ACCESSORY  
POWER  
A
B
C
GAS  
POWER  
CONTROL  
1 -2  
[356]  
2 -0  
[610]  
CRRFCURB001A01  
CRRFCURB002A01  
3
3
3
CRBTMPWR001A01  
CRBTMPWR002A01  
/
[19] NPT  
4
/
581B036-072  
581C024-060  
[19] 4NPT  
11/4 [31.7]  
1 -911  
/
1 -4  
13/4  
[44.5]  
/
/
2
1
1
1
[5511]6 [406]  
[12.7]  
[12.7]  
2
/
2
CRBTMPWR003A01  
CRBTMPWR004A01  
/
[19] NPT  
4
[12.7] NPT  
3
/
[19] 4NPT  
NOTES:  
11/4 [31.7]  
1. Roof curb accessory is shipped disassembled.  
2. Insulated panels.  
3. Dimensions in [ ] are in millimeters.  
4. Roof curb: galvanized steel.  
5. Attach ductwork to curb (flanges of duct rest  
on curb).  
6. Service clearance: 4 ft on each side.  
7.  
Direction of airflow.  
8. Connector packages CRBTMPWR001A01  
and 002A01 are for thru-the-curb type gas.  
Packages CRBTMPWR003A01 and 004A01  
are for thru-the-bottom type gas connections.  
C06345  
Fig. 2 --- Roof Curb Details  
3
MAXIMUM ALLOWABLE  
DIFFERENCE (in.)  
CONDENSATE PAN (SIDE VIEW)  
HORIZONTAL  
DRAIN OUTLET  
A-B  
0.5  
B-C  
1.0  
A-C  
1.0  
DRAIN PLUG  
NOTE: Drain plug is shown in factory-installed position.  
C06003  
Fig. 4 --- Condensate Drain Pan  
C06110  
Fig. 3 --- Unit Leveling Tolerances  
Be sure that unit is installed such that snow will not block the  
combustion intake or flue outlet.  
Unit may be installed directly on wood flooring or on Class A, B,  
or C roof-covering material when roof curb is used.  
Although unit is weatherproof, guard against water from higher  
level runoff and overhangs.  
Locate mechanical draft system flue assembly at least 48 in. from  
an adjacent building or combustible material. When unit is  
located adjacent to public walkways, flue assembly must be at  
least 7 ft above grade.  
NOTE: When unit is equipped with an accessory flue discharge  
deflector, allowable clearance is 18 inches.  
NOTE: Trap should be deep enough to offset maximum unit static  
difference. A 4-in. trap is recommended.  
Flue gas can deteriorate building materials. Orient unit such that  
flue gas will not affect building materials.  
C06004  
Adequate combustion-air space must be provided for proper  
operation of this equipment. Be sure that installation complies  
with all local codes and Section 5.3, Air for Combustion and  
Ventilation, NFGC (National Fuel Gas Code), ANSI (American  
National Standards Institute) Z223.1-1984 and addendum  
Z223.1a-1987. In Canada, installation must be in accordance with  
the CAN1.B149.1 and CAN1.B149.2 installation codes for gas  
burning appliances.  
Flue vent discharge must have a minimum horizontal clearance of  
4 ft from electric and gas meters, gas regulators, and gas relief  
equipment.  
After unit is in position, remove shipping materials and rigging  
skids.  
Fig. 5 --- Condensate Drain Piping Details  
Step 6 Install Gas Piping  
Unit is equipped for use with type of gas shown on nameplate.  
Refer to local  
building codes, or in the absence of local codes,  
to ANSI Z223.1-1984 and addendum Z223.1A-1987 entitled  
National Fuel Gas Code. In Canada, installation must be in  
accordance with the CAN1.B149.1 and CAN1.B149.2  
installation codes for gas burning appliances.  
For natural gas applications, gas pressure at unit gas connection  
must not be less than 4 in. wg or greater than 13 in. wg while the  
unit is operating. On 581B036--072 and 581C036--060 high-heat  
units, the gas pressure at unit gas connection must not be less than  
5 in. wg or greater than 13 in. wg while the unit is operating. For  
propane applications, the gas pressure must not be less than 5 in.  
wg or greater than 13 in. wg at the unit connection.  
Step 5 Install Flue Hood  
Flue hood is shipped screwed to the burner compartment access  
panel. Remove from shipping location and, using screws  
provided, install flue hood in location shown in Fig. 8 and 9.  
For units being installed in California Air Quality Management  
Districts which require NOx emissions of 40 nanograms/joule or  
less, a low NOx unit must be installed.  
Size gas supply piping for 0.5 in. wg maximum pressure drop.  
Do not use supply pipe smaller than unit gas connection.  
NOTE: Low NOx units are available for 2 to 5 ton units.  
4
NOTES:  
1. Place unit on curb as close as possible to the duct end.  
2. Dimension in ( ) is in millimeters.  
3. Hook rigging shackles through holes in base rail as shown in detail A.” Holes in base rails are centered around the unit center of gravity. Use wooden top skid  
when rigging to prevent rigging straps from damaging unit.  
4. Weights include base unit without economizer. See Table 1 for unit operating weights with accessory economizer.  
5. Weights include base unit without the Perfect Humidityt adaptive dehumidification system. See Table 1 for unit operating weights with the Perfect Humidityt  
system.  
C06111  
Fig. 6 --- Rigging Details  
OPERATING  
WEIGHT  
DIMENSIONS  
“B”  
UNIT  
581C  
“A”  
“A”  
“C”  
“C”  
lb  
kg  
in.  
mm  
1872  
1872  
1872  
1872  
in.  
mm  
902  
902  
902  
902  
in.  
mm  
847  
847  
847  
1050  
024  
036  
048  
060  
73.69  
73.69  
73.69  
73.69  
35.50  
35.50  
35.50  
35.50  
33.31  
33.31  
33.31  
41.31  
530  
540  
560  
635  
240  
245  
254  
288  
OPERATING  
WEIGHT  
DIMENSIONS  
“B”  
UNIT  
581B  
lb  
kg  
in.  
mm  
1872  
1872  
1872  
1872  
in.  
mm  
902  
902  
902  
902  
in.  
mm  
847  
847  
847  
1050  
036  
048  
060  
072  
530  
540  
560  
635  
240  
245  
254  
288  
73.69  
73.69  
73.69  
73.69  
35.50  
35.50  
35.50  
35.50  
33.31  
33.31  
33.31  
41.31  
!
WARNING  
PROPERTY DAMAGE HAZARD  
Failure to follow this warning could result in personal  
injury, death and property damage.  
All panels must be in place when rigging and lifting.  
See Fig. 11 for typical pipe guide and locations of external  
manual gas shutoff valve.  
NOTE: If accessory thru-the-bottom connections and roof curb  
are used, refer to the Thru-the-Bottom Accessory Installation  
Instructions for information on power wiring and gas  
connection piping. The power wiring, control wiring and gas  
piping can be routed through field-drilled holes in the basepan.  
The basepan is specially designed and dimpled for drilling the  
access connection holes.  
C06208  
Fig. 7 --- Roof Curb Alignment  
!
WARNING  
Support gas piping as shown in the table in Fig. 11. For example,  
FIRE, EXPLOSION HAZARD  
3
a
/ -in. gas pipe must have one field-fabricated support beam  
4
Failure to follow this warning could result in personal  
injury, death and/or property damage.  
every 8 ft. Therefore, an 18-ft long gas pipe would have a  
minimum of 3 support beams, and a 48-ft long pipe would have a  
minimum of 6 support beams.  
When connecting the gas line to the unit gas valve, the  
installer MUST use a backup wrench to prevent damage  
to the valve.  
5
6
7
Field Power Supply  
All units except 208/230-v units are factory wired for the voltage  
shown on the nameplate. If the 208/230-v unit is to be connected  
to a 208-v power supply, the transformer must be rewired by  
moving the black wire from the 230-v terminal on the  
transformer and connecting it to the 200-v terminal from the  
transformer.  
Refer to unit label diagram for additional information. Pigtails  
are provided for field service. Use factory-supplied splices or UL  
(Underwriters’ Laboratories) approved copper connector.  
When installing units, provide a disconnect per NEC.  
All field wiring must comply with NEC and local  
requirements.  
Install conduit through side panel openings indicated in Fig. 8.  
Route power lines through connector to terminal connections as  
shown in Fig. 12.  
C06114  
Fig. 10 --- Flue Hood Details  
Voltage to compressor terminals during operation must be within  
voltage range indicated on unit nameplate (also see Tables 3 and  
4). On 3-phase units, voltages between phases must be balanced  
within 2% and the current within 10%. Use the formula shown in  
Tables 3 and 4, Note 3 to determine the percent voltage  
imbalance. Operation on improper line voltage or excessive phase  
imbalance constitutes abuse and may cause damage to electrical  
components. Such operation would invalidate any applicable  
Bryant warranty.  
NOTE: If accessory thru-the-bottom connections and roof curb  
are used, refer to the Thru-the-Bottom Accessory Installation  
Instructions for information on power wiring and gas connection  
piping. The power wiring, control wiring and gas piping can be  
routed through field-drilled holes in the basepan. The basepan is  
specially designed and dimpled for drilling the access connection  
holes. (See Fig. 2.)  
LEGEND  
NFGC — National Fuel Gas Code  
*Field supplied.  
NOTE: Follow all local codes.  
Field Control Wiring  
SPACING OF SUPPORTS  
Install  
a
Bryant-approved accessory thermostat assembly  
according to installation instructions included with the accessory.  
Locate thermostat assembly on a solid wall in the conditioned  
space to sense average temperature in accordance with thermostat  
installation instructions.  
Route thermostat cable or equivalent single leads of colored wire  
from subbase terminals through connector on unit to low-voltage  
connections (shown in Fig. 13 and 14).  
STEEL PIPE  
SPACING OF SUPPORTS  
NOMINAL DIAMETER (in.)  
X DIMENSION (ft)  
1
/
6
8
10  
2
3/4 or 1  
11/4 or larger  
C06115  
Fig. 11 --- Gas Piping Guide (With Accessory  
Thru--the--Curb Service Connections)  
Connect thermostat wires to matching screw terminals of  
low-voltage connection board. (See Fig. 13 and 14.)  
Step 7 Make Electrical Connections  
NOTE: For wire runs up to 50 ft, use no. 18 AWG (American  
Wire Gauge) insulated wire (35_C minimum). For 50 to 75 ft, use  
no. 16 AWG insulated wire (35_C minimum). For over 75 ft, use  
no. 14 AWG insulated wire (35_C minimum). All wire larger  
than no. 18 AWG cannot be directly connected to the thermostat  
and will require a junction box and splice at the thermostat.  
!
WARNING  
ELECTRICAL SHOCK HAZARD  
Failure to follow this warning could result in personal  
injury or death.  
Pass the control wires through the hole provided in the corner  
post; then feed wires through the raceway built into the corner  
post to the 24-v barrier located on the left side of the control box.  
(See Fig. 15). The raceway provides the UL required clearance  
between high and low-voltage wiring.  
Unit cabinet must have an uninterrupted, unbroken  
electrical ground to minimize the possibility of personal  
injury if an electrical fault should occur. This ground  
may consist of electrical wire connected to unit ground  
lug in control compartment, or conduit approved for  
electrical ground when installed in accordance with  
NEC (National Electrical Code), ANSI/NFPA (National  
Fire Protection Association), latest edition, and local  
electrical codes. Do not use gas piping as an electrical  
ground.  
Heat Anticipator Settings  
Set heat anticipator settings at 0.14 amp for first stage and 0.14  
for second stage heating, when available.  
8
Table 1—Physical Data 581B  
BASE UNIT 581B  
036  
048  
060  
072  
NOMINAL CAPACITY (tons)  
OPERATING WEIGHT (lb)  
Unit  
Perfect HumidityAdaptive Dehumidification System  
EconoMi$er IV  
Roof Curb  
COMPRESSOR  
Quantity  
Oil (oz)  
REFRIGERANT TYPE  
Expansion Device  
Operating Charge (lb-oz)  
Standard Unit  
Unit With Perfect Humidity Adaptive Dehumidification System  
CONDENSER FAN  
Quantity...Diameter (in.)  
Nominal Cfm  
Motor Hp...Rpm  
Watts Input (Total)  
CONDENSER COIL  
Rows...Fins/in.  
3
4
5
6
530  
15  
50  
540  
23  
50  
560  
25  
50  
635  
29  
50  
115  
115  
115  
115  
Scroll  
R-22  
1
42  
1
53  
1
50  
1
60  
AcutrolMetering Device  
5-8  
12-5  
10-2  
18-8  
10-0  
20-5  
12- 8  
23-14  
Propeller  
1...22  
3500  
/ ...825  
180  
1...22  
3500  
/ ...825  
4
180  
1...22  
4100  
/ ...1100  
1...22  
4100  
/ ...1100  
1
1
1
1
4
4
4
320  
320  
3/8---in. OD Enhanced Copper Tubes, Aluminum Lanced Fins  
1...17  
14.6  
2...17  
16.5  
2...17  
16.5  
2...17  
21.3  
Total Face Area (sq ft)  
EVAPORATOR COIL  
Standard Unit  
3/8---in. OD Enhanced Copper Tubes, Aluminum Double-Wavy Fins  
Rows...Fins/in.  
2...15  
5.5  
2...15  
5.5  
4...15  
5.5  
4...15  
7.3  
Total Face Area (sq ft)  
Unit with Perfect Humidity Adaptive Dehumidification System  
Rows...Fins/in.  
Total Face Area (sq ft)  
EVAPORATOR FAN  
Quantity...Size (in.)  
1...17  
3.9  
2...17  
3.9  
2...17  
3.9  
2...17  
5.2  
Centrifugal Type, Belt Drive  
1...10 x 10  
1200  
1.20  
2.40  
1620  
1725  
48  
56  
1...10 x 10  
1600  
1.20  
1...10 x 10  
2000  
1.30/2.40*  
2.90  
1725  
1725  
48/56*  
56  
1035-1460  
1300-1685  
Ball  
2100  
2.4/3.4  
1...10 x 10  
2400  
2.40  
2.90  
1725  
1725  
56  
56  
1119-1585  
1300-1685  
Ball  
2100  
2.4/3.4  
Nominal Cfm  
Maximum Continuous Bhp  
Std  
Hi-Static  
Std  
Hi-Static  
Std  
Hi-Static  
Std  
2.40  
Motor RPM  
1620  
1725  
48  
Motor Frame Size  
Fan Rpm Range  
56  
680-1044  
1075-1455  
Ball  
770-1185  
1075-1455  
Ball  
2100  
1.9/2.0  
Hi-Static  
Motor Bearing Type  
Maximum Fan Rpm  
Motor Pulley Pitch Diameter A/B (in.)  
2100  
Std  
Hi-Static  
Std  
Hi-Static  
Std  
Hi-Static  
Std  
Hi-Static  
1.9/2.9  
2.8/3.8  
2.8/3.8  
3.4/4.4  
3.4/3.4  
1/  
1
5
5
5
5
7
Nominal Motor Shaft Diameter (in.)  
Fan Pulley Pitch Diameter (in.)  
Belt — Type...Length (in.)  
/
/
/
/
/
/
2
8
2
8
8
8
8
8
5
/
4.5  
4.5  
1...A...36  
1...A...39  
4.0  
4.0  
1...A...36  
1...A...39  
4.0  
4.5  
1....4...40  
1...A...40  
4.0  
4.5  
1...A...38  
1...A...40  
Pulley Center Line Distance (in.)  
10.0-12.4  
10.0-12.4  
14.7-15.5  
14.7-15.5  
Std  
Hi-Static  
Std  
Hi-Static  
Std  
Hi-Static  
Std  
Hi-Static  
Speed Change per Full Turn of  
65  
65  
5
70  
65  
5
75  
60  
6
95  
60  
5
Movable Pulley Flange (rpm)  
Movable Pulley Maximum Full  
Turns from Closed Position  
Factory Setting — Full Turns Open  
6
6
5
5
3
3
3
3
1
1
1
1
3 /  
3 /  
3 /  
3 /  
2
2
2
2
Factory Speed Setting (rpm)  
826  
936  
1248  
1305  
1233  
1233  
1396  
1396  
5
5
5
5
Fan Shaft Diameter at Pulley (in.)  
/
/
/
/
8
8
8
8
LEGEND  
Bhp — Brake Horsepower  
9
Table 1 — Physical Data 581B (cont)  
UNIT SIZE 581B  
036  
048  
060  
072  
FURNACE SECTION  
Rollout Switch Cutout Temp (F)†  
Burner Orifice Diameter (in. ...drill size)**  
Natural Gas —Std  
195  
195  
195  
195  
071/072  
114/115  
149/150  
060N  
.113...33  
.113...33  
.102...38  
.102...38  
.089...43  
.089...43  
.082...45  
.082...45  
.113...33  
.113...33  
.129...30  
.102...38  
.102...38  
.116...32  
.089...43  
.089...43  
.102...38  
.082...45  
.082...45  
.094...42  
.113...33  
.113...33  
.129...30  
.102...38  
.102...38  
.116...32  
.089...43  
.089...43  
.102...38  
.082...45  
.082...45  
.094...42  
.113...33  
.113...33  
.129...30  
.089...43  
.089...43  
.104...39  
090N  
120N  
Propane —Alt††  
071/072  
114115  
149/150  
060N  
090N  
120N  
Thermostat Heat Anticipator Setting (amps)  
208/230/460 v  
First Stage  
.14  
.14  
.14  
.14  
.14  
.14  
.14  
.14  
Second Stage  
Gas Input (Btuh)  
First Stage/Second Stage (3---phase units)  
072  
115  
150  
50,000/ 72,000  
82,000/115,000  
—/72,000  
—/115,000  
50,000/ 72,000  
82,000/115,000  
120,000/150,000  
—/72,000  
—/115,000  
—/150,000  
—/60,000  
—/90,000  
—/120,000  
82  
50,000/ 72,000  
82,000/115,000  
120,000/150,000  
—/72,000  
—/115,000  
—/150,000  
—/60,000  
—/90,000  
—/120,000  
82  
50,000/ 72,000  
82,000/115,000  
120,000/150,000  
071II  
114II  
149II  
060N***  
090N***  
120N***  
072  
—/ 60,000  
—/ 90,000  
Efficiency (Steady State) (%)  
82  
82  
115  
80  
81  
81  
81  
150  
80  
80  
80  
071  
82  
82  
82  
114  
80  
81  
81  
149  
80  
80  
060N  
090N  
120N  
072  
80  
80  
80  
80  
80  
80  
80  
80  
Temperature Rise Range  
15---45  
55---85  
15---45  
35---65  
50---80  
15---45  
35---65  
50---80  
20---50  
30---60  
40---70  
15---45  
35---65  
50---80  
15---45  
35---65  
50---80  
20---50  
30---60  
40---70  
15---45  
35---65  
50---80  
115  
150  
071  
15---45  
55---85  
20---50  
30---60  
114  
149  
060N  
090N  
120N  
Manifold Pressure (in. wg)  
Natural Gas —Std  
3.5  
3.5  
1.0  
1/2  
3.5  
3.5  
1.0  
1/2  
3.5  
3.5  
1.0  
1/2  
3.5  
3.5  
1.0  
1/2  
Propane —Alt††  
Maximum Static Pressure (in. wg)  
Field Gas Connection Size (in.)  
HIGH-PRESSURE SWITCH (psig)  
Standard Compressor Internal Relief  
Cutout  
450 ± 50  
428  
320  
Reset (Auto.)  
LOSS-OF-CHARGE SWITCH/LOW-PRESSURE  
(Liquid Line) (psig)  
Cutout  
7 ± 3  
Reset (Auto.)  
22 ± 5  
FREEZE PROTECTION THERMOSTAT  
Opens (F)  
Closes (F)  
OUTDOOR-AIR INLET SCREENS  
RETURN-AIR FILTERS  
Quantity...Size (in.)  
30 ± 5  
45 ± 5  
Cleanable. Screen quantity and size varies with option selected.  
Throwaway  
2...16 x 25 x 2  
4...16 x 16 x 2  
LEGEND  
Bhp — Brake Horsepower  
**60,000 and 72,000 Btuh heat input units have 2 burners. 90,000 and 120,000 Btuh  
heat input units have 3 burners. 115,000 Btuh heat input units and 150,000 Btuh  
Heat input units have 3 burners.  
††A propane kit is available as an accessory. Kit may be used at elevations as high as  
2000 ft. If a propane kit is used with Low NOx units, the Low NOx baffle must be  
removed and the units will no longer be classified as Low NOx units.  
ll Three-phase standard models have heating inputs as shown. Single-phase stan-  
dard models have one-stage heating with heating input values.  
***California compliant three-phase models.  
†††California SCAQMD compliant low NO models have combustion products that are  
x
controlled to 40 nanograms per joule or less.  
10  
Table 2—Physical Data 581C  
BASE UNIT 581C  
024  
036  
048  
072  
NOMINAL CAPACITY (tons)  
OPERATING WEIGHT (lb)  
Unit  
Perfect HumidityAdaptive Dehumidification System  
EconoMi$er IV  
Roof Curb  
COMPRESSOR  
Quantity  
Oil (oz)  
REFRIGERANT TYPE  
Expansion Device  
Operating Charge (lb-oz)  
Standard Unit  
Unit With Perfect Humidity Adaptive Dehumidification System  
CONDENSER FAN  
Quantity...Diameter (in.)  
Nominal Cfm  
Motor Hp...Rpm  
Watts Input (Total)  
CONDENSER COIL  
Rows...Fins/in.  
2
3
4
5
530  
13  
50  
540  
15  
50  
560  
23  
50  
635  
25  
50  
115  
115  
115  
115  
Scroll  
1
25  
1
42  
1
56  
1
53  
R-22  
AcutrolMetering Device  
5 --- 3  
10 --- 2  
7 --- 11  
14 --- 0  
8 --- 8  
14---13  
Propeller  
1...22  
12---11  
21 --- 0  
1...22  
3000  
/8...825  
180  
1...22  
3500  
/8...825  
180  
1...22  
4100  
/ ...1100  
3500  
/8...825  
180  
1
1
1
1
4
320  
3/8---in. OD Enhanced Copper Tubes, Aluminum Lanced Fins  
1...17  
14.6  
1...17  
14.6  
2...17  
16.5  
2...17  
16.5  
Total Face Area (sq ft)  
EVAPORATOR COIL  
Standard Unit  
3/8---in. OD Enhanced Copper Tubes, Aluminum Double-Wavy Fins  
Rows...Fins/in.  
2...15  
4.2  
2...15  
5.5  
2...15  
5.5  
4...15  
5.5  
Total Face Area (sq ft)  
Unit with Perfect Humidity Adaptive Dehumidification System  
Rows...Fins/in.  
Total Face Area (sq ft)  
EVAPORATOR FAN  
Quantity...Size (in.)  
1...17  
3.5  
1...17  
3.9  
2...17  
3.9  
2...17  
3.9  
Centrifugal Type, Belt Drive  
1...10 x 10  
800  
0.58  
1...10 x 10  
1200  
1.20  
2.40  
48  
56  
1620  
680-1044  
1075-1455  
Ball  
1...10 x 10  
1600  
1.20  
2.40  
48  
56  
1620  
770-1185  
1075-1455  
Ball  
1...10 x 10  
2000  
1.30/2.40*  
2.90  
48/56*  
56  
1725  
1035-1460  
1300-1685  
Ball  
2100  
2.4/3.4  
Nominal Cfm  
Maximum Continuous Bhp  
Std  
Hi-Static  
Std  
Motor Frame Size  
48  
Hi-Static  
Motor Rpm  
Fan Rpm Range  
1620  
400-1000  
Std  
Hi-Static  
Motor Bearing Type  
Maximum Fan Rpm  
Motor Pulley Pitch Diameter A/B (in.)  
Ball  
1620  
2.4/3.2  
2100  
2100  
1.9/2.0  
Std  
Hi-Static  
Std  
Hi-Static  
Std  
Hi-Static  
Std  
Hi-Static  
1.9/2.9  
2.8/3.8  
2.8/3.8  
3.4/4.4  
5
7
1/  
1
5
5
5
Nominal Motor Shaft Diameter (in.)  
Fan Pulley Pitch Diameter (in.)  
Belt — Type...Length (in.)  
/
/
/
/
/
/
8
8
2
8
2
8
8
8
5
/
4.0  
4.5  
1...A...36  
4.5  
4.5  
1...A...36  
1...A...39  
4.0  
4.0  
1...A...36  
1...A...39  
4.0  
4.5  
1....4...40  
1...A...40  
Pulley Center Line Distance (in.)  
10.0---12.4  
60  
10.0-12.4  
10.0-12.4  
14.7-15.5  
Std  
Hi-Static  
Std  
Hi-Static  
Std  
Hi-Static  
Std  
Hi-Static  
Speed Change per Full Turn of  
65  
65  
5
70  
65  
5
75  
60  
6
Movable Pulley Flange (rpm)  
Movable Pulley Maximum Full  
Turns from Closed Position  
Factory Setting — Full Turns Open  
5
3
6
6
5
3
3
3
1
1
1
3 /  
3 /  
3 /  
2
2
2
Factory Speed Setting (rpm)  
756  
5
826  
936  
1248  
1233  
1233  
1396  
5
5
5
Fan Shaft Diameter at Pulley (in.)  
/
/
/
/
8
8
8
8
11  
Table 2 — Physical Data 581C (cont)  
UNIT SIZE 581C  
024  
036  
048  
060  
FURNACE SECTION  
Rollout Switch Cutout Temp (F)†  
Burner Orifice Diameter (in. ...drill size)**  
Natural Gas —Std  
195  
195  
195  
195  
071/072  
114/115  
149/150  
060N  
.113...33  
.113...33  
.102...38  
.102...38  
.089...43  
.089...43  
.082...45  
.082...45  
.113...33  
.113...33  
.129...30  
.102...38  
.102...38  
.116...32  
.089...43  
.089...43  
.102...38  
.082...45  
.082...45  
.094...42  
.113...33  
.113...33  
.129...30  
.102...38  
.102...38  
.116...32  
.089...43  
.089...43  
.102...38  
.082...45  
.082...45  
.094...42  
.113...33  
.113...33  
.129...30  
.089...43  
.089...43  
.104...39  
090N  
120N  
Propane —Alt††  
071/072  
114115  
149/150  
060N  
090N  
120N  
Thermostat Heat Anticipator Setting (amps)  
208/230/460 v  
First Stage  
.14  
.14  
.14  
.14  
.14  
.14  
.14  
.14  
Second Stage  
Gas Input (Btuh)  
First Stage/Second Stage (3---phase units)  
072  
115  
150  
50,000/ 72,000  
82,000/115,000  
—/72,000  
—/115,000  
50,000/ 72,000  
82,000/115,000  
120,000/150,000  
—/72,000  
—/115,000  
—/150,000  
—/60,000  
—/90,000  
—/120,000  
82  
50,000/ 72,000  
82,000/115,000  
120,000/150,000  
—/72,000  
—/115,000  
—/150,000  
—/60,000  
—/90,000  
—/120,000  
82  
50,000/ 72,000  
82,000/115,000  
120,000/150,000  
071II  
114II  
149II  
060N***  
090N***  
120N***  
072  
—/ 60,000  
—/ 90,000  
Efficiency (Steady State) (%)  
82  
82  
115  
80  
81  
81  
81  
150  
80  
80  
80  
071  
82  
82  
82  
114  
80  
81  
81  
149  
80  
80  
060N  
090N  
120N  
072  
80  
80  
80  
80  
80  
80  
80  
80  
Temperature Rise Range  
15---45  
55---85  
15---45  
35---65  
50---80  
15---45  
35---65  
50---80  
20---50  
30---60  
40---70  
15---45  
35---65  
50---80  
15---45  
35---65  
50---80  
20---50  
30---60  
40---70  
15---45  
35---65  
50---80  
115  
150  
071  
15---45  
55---85  
20---50  
30---60  
114  
149  
060N  
090N  
120N  
Manifold Pressure (in. wg)  
Natural Gas —Std  
3.5  
3.5  
1.0  
1/2  
3.5  
3.5  
1.0  
1/2  
3.5  
3.5  
1.0  
1/2  
3.5  
3.5  
1.0  
1/2  
Propane —Alt††  
Maximum Static Pressure (in. wg)  
Field Gas Connection Size (in.)  
HIGH-PRESSURE SWITCH (psig)  
Standard Compressor Internal Relief  
Cutout  
450 ± 50  
428  
320  
Reset (Auto.)  
LOSS-OF-CHARGE SWITCH/LOW-PRESSURE  
(Liquid Line) (psig)  
Cutout  
7 ± 3  
Reset (Auto.)  
22 ± 5  
FREEZE PROTECTION THERMOSTAT  
Opens (F)  
Closes (F)  
OUTDOOR-AIR INLET SCREENS  
RETURN-AIR FILTERS  
Quantity...Size (in.)  
30 ± 5  
45 ± 5  
Cleanable. Screen quantity and size varies with option selected.  
Throwaway  
2...16 x 25 x 2  
4...16 x 16 x 2  
LEGEND  
Bhp — Brake Horsepower  
removed and the units will no longer be classified as Low NOx units.  
ll Three-phase standard models have heating inputs as shown. Single-phase stan-  
dard models have one-stage heating with heating input values.  
***California compliant three-phase models.  
**60,000 and 72,000 Btuh heat input units have 2 burners. 90,000 and 120,000 Btuh  
heat input units have 3 burners. 115,000 Btuh heat input units and 150,000 Btuh  
Heat input units have 3 burners.  
†††California SCAQMD compliant low NO models have combustion products that are  
x
controlled to 40 nanograms per joule or less.  
††A propane kit is available as an accessory. Kit may be used at elevations as high as  
2000 ft. If a propane kit is used with Low NOx units, the Low NOx baffle must be  
12  
TO COMP  
BLK  
YEL  
BLK  
YEL  
TO COMP  
BLK  
BLU  
11  
21  
23  
23  
11  
21  
23  
23  
11  
21  
23  
23  
YEL  
BLU  
C
C
C
EQUIP  
GND  
FIELD POWER SUPPLY  
DISCONNECT  
PER NEC  
575-3-60  
FIELD POWER SUPPLY  
(SIZES 581B036,048  
581C036,048)  
FIELD POWER SUPPLY  
208/230-3-60  
480-3-60  
DISCONNECT  
PER NEC  
DISCONNECT  
PER NEC  
208/230-1-60  
(SIZES 581B036-060,  
581C024-060)  
(SIZES 581B036,048  
581C036,048)  
TO COMP  
BLK  
TO TB2  
BLK  
YEL  
11  
21  
23  
23  
11  
21  
13  
23  
YEL  
BLU  
C
C
BLU  
1
4
6
IFC  
3
FIELD POWER SUPPLY  
DISCONNECT  
PER NEC  
575-3-60  
(SIZES 581B060, 072)  
FIELD POWER SUPPLY  
208/230-3-60  
460-3-60  
DISCONNECT  
PER NEC  
(SIZES 581B060, 072,  
581C0060)  
C06346  
Fig. 12 --- Power Wiring Connections  
LOW VOLTAGE  
CONNECTIONS  
INTEGRATED GAS UNIT  
CONTROLLER (IGC)  
R
COOL STAGE 1  
FAN  
Y1/W2  
G
G
Y1  
Y2  
W1  
W2  
C
HEAT STAGE 1  
COOL STAGE 2  
HEAT STAGE 2  
24 VAC HOT  
W/W1  
Y/Y2  
O/W2  
R
WIRE  
CONNECTIONS  
TO  
LOW-VOLTAGE  
SECTION  
24 VAC COM  
N/A  
C
IPD/X  
OUTDOOR AIR  
SENSOR  
S1  
S2  
THERMOSTAT DIPSWITCH SETTINGS  
ON  
OFF  
D
A
B
C
LEGEND  
Field Wiring  
NOTE: Underlined letter indicates active thermostat output when  
configured for A/C operation.  
C06008  
Fig. 13 --- Low--Voltage Connections With or  
C06125  
Without Economizer or Two--Position Damper  
Fig. 14 --- Field Control Wiring  
13  
14  
15  
To install Thermidistat device:  
Step 8 Adjust Factory--Installed Options  
1. Route Thermidistat cable through hole provided in unit  
control box.  
Perfect HumidityAdaptive Dehumidification  
System  
2. Some models may be equipped with a raceway built into  
the corner post located on the left side of control box (See  
Fig. 14). This raceway provides the required clearance  
between high--voltage and low voltage wiring. For models  
without a raceway, ensure to provide the NEC required  
clearance between the high--voltage and low--voltage  
wiring.  
Perfect Humidity system operation can be controlled by field  
installation of a Bryant--approved humidistat. (See Fig. 15.)  
NOTE: A light commercial Thermidistatdevice (Fig. 16) can  
be used instead of the humidistat if desired. The Thermidistat  
device includes a thermostat and a humidistat. The humidistat is  
normally used in applications where a temperature sensor is  
already provided.  
3. A field-supplied relay must be installed between the  
Thermidistat and the Humidi-Mizer circuit (recommended  
relay: HN61KK324). (See Fig. 18.) The relay coil is  
connected between the DEHUM output and C (common)  
of the unit. The relay controls thePerfect Humidity  
solenoid valve and must be wired between the Perfect  
Humidity fuse and the low-pressure switch. Refer to the  
installation instructions included with the Bryant Light  
Commercial Thermidistat device for more information.  
Manual Outdoor Damper  
The outdoor--air hood and screen are attached to the basepan at  
the bottom of the unit for shipping.  
% RELATIVE HUMIDITY  
Assembly:  
1. Determine quantity of ventilation required for building.  
Record amount for use in Step 8.  
C06358  
Fig. 15 --- Accessory Field--Installed Humidistat  
2. Remove and save outdoor air opening panel and screws.  
(See Fig. 19.)  
3. Remove evaporator coil access panel. Separate hood and  
screen from basepan by removing the 4 screws securing  
them. Save all screws.  
4. Replace evaporator coil access panel.  
5. Place hood on front of outdoor air opening panel. See  
Fig. 20 for hood details. Secure top of hood with the  
4 screws removed in Step 3. (See Fig. 21.)  
6. Remove and save 6 screws (3 on each side) from sides of  
the manual outdoor-air damper.  
7. Align screw holes on hood with screw holes on side of  
manual outdoor-air damper. (See Fig. 28 and 21.) Secure  
hood with 6 screws from Step 6.  
C06359  
8. Adjust minimum position setting of the damper blade by  
adjusting the manual outdoor-air adjustment screws on the  
front of the damper blade. (See Fig. 19.) Slide blade  
vertically until it is in the appropriate position determined  
by Fig. 22. Tighten screws.  
Fig. 16 --- Light Commercial Thermidistat Device  
To install the humidistat:  
1. Route humidistat cable through hole provided in unit  
control box.  
9. Remove and save screws currently on sides of hood.  
Insert screen. Secure screen to hood using the screws. (See  
Fig. 21.)  
2. Some models may be equipped with a raceway built into  
the corner post located on the left side of control box (See  
Fig. 14). This raceway provides the required clearance  
between high--voltage and low voltage wiring. For models  
without a raceway, ensure to provide the NEC required  
clearance between the high--voltage and low--voltage  
wiring.  
Convenience Outlet  
An optional convenience outlet provides power for rooftop use.  
For maintenance personnel safety, the convenience outlet power  
is off when the unit disconnect is off. Adjacent unit outlets may  
be used for service tools.  
3. Use a wire nut to connect humidistat cable into low-  
voltage wiring as shown in Fig. 17.  
16  
LEGEND  
CB  
Circuit Breaker  
Terminal (Unmarked)  
Splice  
CR  
Cooling Relay  
DHR  
DSV  
HR  
LPS  
LSV  
LTLO  
Dehumidify Relay  
Discharge Solenoid Valve  
Heater Relay  
Low Pressure Switch  
Liquid Solenoid Valve  
Low Temperature Lockout  
Factory Wiring  
Field Control Wiring  
Field Power Wiring  
Field Splice  
C06128  
Fig. 17 --- Typical Perfect Humidityt Adaptive Dehumidification System  
Humidistat Wiring (208/230--V Unit Shown)  
LCT  
ROOF TOP UNIT  
R
C
R
C
Y1  
Y2  
G
Y1  
Y2  
G
W1  
W2  
W1  
W2  
DEHUM  
OC  
CB  
R1  
R1  
3.2 AMPS  
PINK  
PINK  
RED  
24V  
TSTATWIRES  
LEGEND  
LTLO  
PINK  
FROM  
PERFECT HUMIDITY SYSTEM  
LLSV  
CB  
Circuit Breaker  
LCT — Light Commercial Thermidistat™ Device  
LLSV — Liquid Line Solenoid Valve  
LTLO — Low Temperature Lockout  
PERFECT HUMIDITY SYSTEM  
C06360  
Fig. 18 --- Typical Rooftop Unit with Perfect Humidity  
Adaptive Dehumidification System with Thermidistat Device  
OUTDOOR  
AIR OPENING  
PANEL  
3 SCREWS  
(SIDE)  
C06130  
Fig. 19 --- Damper Panel with Manual Outdoor--Air  
Damper Installed  
C06013  
Fig. 20 --- Outdoor--Air Hood Details  
17  
Optional Economi$er IV  
See Fig. 23 for EconoMi$er IV component locations.  
NOTE: These instructions are for installing the optional  
EconoMi$er IV. Refer to the accessory EconoMi$er IV when  
field installing an EconoMi$er IV accessory.  
1. To remove the existing unit filter access panel, raise the  
panel and swing the bottom outward. The panel is now  
disengaged from the track and can be removed. (See  
Fig. 24.)  
2. The box with the economizer hood components is shipped  
in the compartment behind the economizer. The  
EconoMi$er IV controller is mounted on top of the  
EconoMi$er IV. To remove the component box from its  
shipping position, remove the screw holding the hood box  
bracket to the top of the economizer. Slide the hood box  
out of the unit. (See Fig. 25.)  
C06131  
Fig. 21 --- Outdoor--Air Damper With  
Hood Attached  
IMPORTANT: If the power exhaust accessory is to be installed  
on the unit, the hood shipped with the unit will not be used and  
must be discarded. Save the aluminum filter for use in the power  
exhaust hood assembly.  
3. The indoor coil access panel will be used as the top of the  
hood. Remove the screws along the sides and bottom of  
the indoor coil access panel. (See Fig. 26.)  
4. Swing out indoor coil access panel and insert the hood  
sides under the panel (hood top). Use the screws provided  
to attach the hood sides to the hood top. Use screws  
provided to attach the hood sides to the unit. (See Fig. 27.)  
5. Remove the shipping tape holding the economizer  
barometric relief damper in place.  
6. Insert the hood divider between the hood sides. (See  
Fig. 28 and 29.) Secure hood divider with 2 screws on  
each hood side. The hood divider is also used as the  
bottom filter rack for the aluminum filter.  
7. Open the filter clips which are located underneath the  
hood top. Insert the aluminum filter into the bottom filter  
rack (hood divider). Push the filter into position past the  
open filter clips. Close the filter clips to lock the filter into  
place. (See Fig. 28.)  
C06132  
Fig. 22 --- Outdoor--Air Damper Position Setting  
8. Caulk the ends of the joint between the unit top panel and  
the hood top. (See Fig. 26.)  
ECONOMI$ER IV  
CONTROLLER  
9. Replace the filter access panel.  
10. Install all EconoMi$er IV accessories. EconoMi$er IV  
wiring is shown in Fig. 29.  
OUTSIDE AIR  
WIRING  
TEMPERATURE SENSOR  
HARNESS  
LOW AMBIENT  
SENSOR  
Barometric flow capacity is shown in Fig. 30. Outdoor air  
leakage is shown in Fig. 33. Return air pressure drop is shown in  
Fig. 32.  
ACTUATOR  
FILTER ACCESS PANEL  
C06021  
Fig. 23 --- EconoMi$er IV Component Locations  
COMPRESSOR  
ACCESS PANEL  
OUTDOOR-AIR OPENING AND  
INDOOR COIL ACCESS PANEL  
C06023  
Fig. 24 --- Typical Access Panel Locations  
18  
Supply Air Temperature (SAT) Sensor  
The supply air temperature sensor is a 3k ohm thermistor located  
at the inlet of the indoor fan. (See Fig. 34.) This sensor is factory  
installed. The operating range of temperature measurement is 0°  
to 158_F. See Table 5 for sensor temperature/resistance values.  
HOOD BOX  
BRACKET  
Table 5—Supply Air Sensor Temperature/  
Resistance Values  
TEMPERATURE (F)  
RESISTANCE (ohms)  
–58  
–40  
–22  
–4  
200,250  
100,680  
53,010  
29,091  
16,590  
9,795  
5,970  
3,747  
3,000  
2,416  
1,597  
1,080  
746  
525  
376  
321  
274  
203  
153  
116  
102  
14  
32  
C06024  
50  
Fig. 25 --- Hood Box Removal  
68  
77  
86  
104  
122  
140  
158  
176  
185  
194  
212  
230  
248  
257  
266  
284  
302  
SIDE  
PANEL  
89  
70  
55  
TOP  
SIDE  
PANEL  
CAULK  
HERE  
INDOOR  
COIL  
ACCESS  
PANEL  
INDOOR  
COIL  
ACCESS  
PANEL  
17 1/4”  
C06025  
Fig. 26 --- Indoor Coil Access Panel Relocation  
DIVIDER  
TOP  
PANEL  
OUTSIDE  
AIR  
INDOOR COIL  
ACCESS PANEL  
HOOD  
CLEANABLE  
ALUMINUM  
FILTER  
FILTER  
LEFT  
HOOD  
SIDE  
SCREW  
B
19 1/16”  
BAROMETRIC  
RELIEF  
FILTER  
CLIP  
33 3/8”  
C06027  
Fig. 28 --- Filter Installation  
HOOD DIVIDER  
The temperature sensor looks like an eyelet terminal with wires  
running to it. The sensor is located in the “crimp end” and is  
sealed from moisture.  
C06026  
Fig. 27 --- Outdoor--Air Hood Construction  
Outdoor Air Lockout Sensor  
Economi$er IV Standard Sensors  
Outdoor Air Temperature (OAT) Sensor  
The Economi$er IV is equipped with an ambient temperature  
lockout switch located in the outdoor air stream which is used to  
lockout the compressors below a 42_F ambient temperature. (See  
Fig. 23.)  
The outdoor air temperature sensor (HH57AC074) is a 10 to 20  
mA device used to measure the outdoor-air temperature. The  
outdoor-air temperature is used to determine when the  
EconoMi$er IV can be used for free cooling. The sensor is  
factory-installed on the EconoMi$er IV in the outdoor airstream.  
(See Fig. 23 and 33.) The operating range of temperature  
measurement is 40_ to 100_F.  
19  
Economi$er IV Control Modes  
Differential Dry Bulb Control  
Determine the EconoMi$er IV control mode before set up of the  
control. Some modes of operation may require different  
sensors. (See Table 6.) The EconoMi$er IV is supplied from the  
factory with a supply--air temperature sensor and an outdoor-- air  
temperature sensor. This allows for operation of the EconoMi$er  
IV with outdoor air dry bulb changeover control. Additional  
accessories can be added to allow for different types of  
changeover control and operation of the EconoMi$er IV and unit.  
For differential dry bulb control the standard outdoor dry bulb  
sensor is used in conjunction with an additional accessory dry  
bulb sensor (part number CRTEMPSN002A00). The accessory  
sensor must be mounted in the return airstream. (See Fig. 37.)  
Wiring is provided in the EconoMi$er IV wiring harness. (See  
Fig. 29.)  
In this mode of operation, the outdoor-air temperature is  
compared to the return-air temperature and the lower temperature  
airstream is used for cooling. When using this mode of  
changeover control, turn the enthalpy setpoint potentiometer fully  
clockwise to the D setting. (See Fig. 35.)  
Outdoor Dry Bulb Changeover  
The standard controller is shipped from the factory configured for  
outdoor dry bulb changeover control. The outdoor--air and  
supply--air temperature sensors are included as standard. For this  
control mode, the outdoor temperature is compared to an  
adjustable set point selected on the control. If the outdoor-air  
temperature is above the set point, the EconoMi$er IV will adjust  
the outdoor-air dampers to minimum position. If the outdoor air  
temperature is below the set point, the position of the outdoor air  
dampers will be controlled to provide free cooling using outdoor  
air. When in this mode, the LED next to the free cooling set point  
potentiometer will be on. The changeover temperature set point is  
controlled by the free cooling set point potentiometer located on  
the control. (See Fig. 35.) The scale on the potentiometer is A, B,  
C, and D. See Fig. 36 for the corresponding temperature  
changeover values.  
Outdoor Enthalpy Changeover  
For enthalpy control, accessory enthalpy sensor (part number  
HH57AC078) is required. Replace the standard outdoor dry bulb  
temperature sensor with the accessory enthalpy sensor in the same  
mounting location. (See Fig. 23 and 33.) When the outdoor air  
enthalpy rises above the outdoor enthalpy changeover set point,  
the outdoor-air damper moves to its minimum position. The  
outdoor enthalpy changeover set point is set with the outdoor  
enthalpy set point potentiometer on the EconoMi$er IV  
controller. The set points are A, B, C, and D. (See Fig. 38.) The  
factory-installed 620-ohm jumper must be in place across  
terminals SR and SR+ on the EconoMi$er IV controller. (See Fig.  
23 and 39.)  
Differential Enthalphy Control  
Table 6—Economi$er IV Sensor Usage  
For differential enthalpy control, the EconoMi$er IV controller  
uses  
two  
enthalpy  
sensors  
(HH57AC078  
and  
ECONOMI$ER IV WITH OUTDOOR AIR  
CRENTDIF004A00), one in the outside air and one in the return  
air duct. The EconoMi$er IV controller compares the outdoor air  
enthalpy to the return air enthalpy to determine EconoMi$er IV  
use. The controller selects the lower enthalpy air (return or  
outdoor) for cooling. For example, when the outdoor air has a  
lower enthalpy than the return air, the EconoMi$er IV opens to  
bring in outdoor air for free cooling.  
DRY BULB SENSOR  
Accessories Required  
APPLICATION  
None. The outdoor air dry bulb sensor  
Outdoor Air  
Dry Bulb  
Differential  
Dry Bulb  
is factory installed.  
CRTEMPSN002A00*  
Single Enthalpy  
HH57AC078  
HH57AC078  
Differential  
Enthalpy  
Replace the standard outside air dry bulb temperature sensor with  
the accessory enthalpy sensor in the same mounting location.  
(See Fig. 23.) Mount the return air enthalpy sensor in the return  
air duct. (See Fig. 37.) Wiring is provided in the EconoMi$er IV  
wiring harness. (See Fig. 29.) The outdoor enthalpy changeover  
set point is set with the outdoor enthalpy set point potentiometer  
on the EconoMi$er IV controller. When using this mode of  
changeover control, turn the enthalpy setpoint potentiometer fully  
clockwise to the D setting.  
and  
CRENTDIF004A00*  
CO for DCV  
2
Control using a  
Wall-Mounted  
33ZCSENCO2  
CO Sensor  
2
CO for DCV  
2
33ZCSENCO2†  
O
Control using a  
Duct-Mounted  
and  
CRCBDIOX005A00††  
R
33ZCASPCO2**  
CO Sensor  
2
*CRENTDIF004A00 and CRTEMPSN002A00 accessories are used on many  
different base units. As such, these kits may contain parts that will not be  
needed for installation.  
† 33ZCSENCO2 is an accessory CO sensor.  
2
** 33ZCASPCO2 is an accessory aspirator box required for duct-mounted  
applications.  
†† CRCBDIOX005A00 is an accessory that contains both 33ZCSENCO2  
and 33ZCASPCO2 accessories.  
20  
FOR OCCUPANCY CONTROL  
REPLACE JUMPER WITH  
FIELD-SUPPLIED TIME CLOCK  
8
7
Potentiometer Defaults Settings:  
LEGEND  
NOTES:  
Power Exhaust Middle  
1. 620 ohm, 1 watt 5% resistor should be removed only when using differential  
DCV— Demand Controlled Ventilation  
IAQ — Indoor Air Quality  
Minimum Pos.  
DCV Max.  
DCV Set  
Fully Closed  
enthalpy or dry bulb.  
Middle  
2. If a separate field-supplied 24 v transformer is used for the IAQ sensor power  
supply, it cannot have the secondary of the transformer grounded.  
3. For field-installed remote minimum position POT, remove black wire jumper  
between P and P1 and set control minimum position POT to the minimum  
position.  
LA — Low Ambient Lockout Device  
OAT — Outdoor-Air Temperature  
POTPotentiometer  
Middle  
C Setting  
Enthalpy  
RAT — Return-Air Temperature  
C06028  
Fig. 29 --- EconoMi$er IV Wiring  
6000  
5000  
4000  
3000  
2000  
1000  
0
2500  
2000  
1500  
1000  
500  
0
0.15  
0.05  
0.25  
0.05  
0.10  
0.15  
0.20  
0.25  
0.30  
0.35  
STATIC PRESSURE (in. wg)  
STATIC PRESSURE (in. wg)  
C06030  
C06032  
Fig. 30 --- Barometric Flow Capacity  
Fig. 32 --- Return--Air Pressure Drop  
30  
25  
20  
15  
10  
5
HH57AC078 ENTHALPY  
SENSOR  
C7400A1004  
+
MOUNTING PLATE  
0
0.13 0.20 0.22 0.25 0.30 0.35 0.40 0.45 0.50  
STATIC PRESSURE (in. wg)  
C06031  
Fig. 31 --- Outdoor--Air Damper Leakage  
C06361  
Fig. 33 --- Enthalpy Sensor and Mounting Plate  
21  
Minimum Position Control  
There is a minimum damper position potentiometer on the  
EconoMi$er IV controller. (See Fig. 35.) The minimum damper  
position maintains the minimum airflow into the building during  
the occupied period.  
SUPPLY AIR  
TEMPERATURE  
SENSOR  
MOUNTING  
LOCATION  
When using demand ventilation, the minimum damper position  
represents the minimum ventilation position for VOC (volatile  
organic compound) ventilation requirements. The maximum  
demand ventilation position is used for fully occupied ventilation.  
When demand ventilation control is not being used, the minimum  
position potentiometer should be used to set the occupied  
ventilation position. The maximum demand ventilation position  
should be turned fully clockwise.  
SUPPLY AIR  
TEMPERATURE  
SENSOR  
Adjust the minimum position potentiometer to allow the  
minimum amount of outdoor air, as required by local codes, to  
enter the building. Make minimum position adjustments with at  
least 10_F temperature difference between the outdoor and  
return-air temperatures.  
C06033  
Fig. 34 --- Supply Air Sensor Location  
To determine the minimum position setting, perform the  
following procedure:  
1. Calculate the appropriate mixed air temperature using the  
following formula:  
OA  
100  
RA  
100  
+ (TR x  
(TO x  
)
) =TM  
T
O
= Outdoor-Air Temperature  
OA = Percent of Outdoor Air  
T = Return-Air Temperature  
R
RA = Percent of Return Air  
T
M
= Mixed-Air Temperature  
As an example, if local codes require 10% outdoor air during  
occupied conditions, outdoor-air temperature is 60_F, and  
return-air temperature is 75_F.  
C06034  
Fig. 35 --- EconoMi$er IV Controller Potentiometer  
and LED Locations  
(60 x .10) + (75 x .90) = 73.5_F  
2. Disconnect the supply air sensor from terminals T and T1.  
Indoor Air Quality (IAQ) Sensor Input  
3. Ensure that the factory-installed jumper is in place across  
terminals P and P1. If remote damper positioning is being  
used, make sure that the terminals are wired according to  
Fig. 29 and that the minimum position potentiometer is  
turned fully clockwise.  
The IAQ input can be used for demand control ventilation control  
based on the level of CO measured in the space or return air  
2
duct.  
Mount the accessory IAQ sensor according to manufacturer  
specifications. The IAQ sensor is wired to the AQ and AQ1  
terminals of the controller. Adjust the DCV potentiometers to  
correspond to the DCV voltage output of the indoor air quality  
sensor at the user-determined set point. (See Fig. 40.)  
If a separate field-supplied transformer is used to power the IAQ  
sensor, the sensor must not be grounded or the EconoMi$er IV  
control board will be damaged.  
4. Connect 24 vac across terminals TR and TR1.  
5. Carefully adjust the minimum position potentiometer  
until the measured supply air temperature matches the  
calculated value.  
6. Reconnect the mixed air sensor to terminals T and T1.  
Remote control of the EconoMi$er IV damper is desirable when  
requiring  
additional  
temporary  
ventilation.  
If  
a
Exhaust Set Point Adjustment  
field-supplied remote potentiometer (Honeywell part number  
S963B1128) is wired to the EconoMi$er IV controller, the  
minimum position of the damper can be controlled from a remote  
location.  
The exhaust set point will determine when the exhaust fan runs  
based on damper position (if accessory power exhaust is  
installed). The set point is modified with the Exhaust Fan Set  
Point (EXH SET) potentiometer. (See Fig. 35.) The set point  
represents the damper position above which the exhaust fans will  
be turned on. When there is a call for exhaust, the EconoMi$er IV  
controller provides a 45 ± 15 second delay before exhaust fan  
activation to allow the dampers to open. This delay allows the  
damper to reach the appropriate position to avoid unnecessary fan  
overload.  
22  
To control the minimum damper position remotely, remove the  
factory-installed jumper on the P and P1 terminals on the  
EconoMi$er IV controller. Wire the field-supplied potentiometer  
to the P and P1 terminals on the EconoMi$er IV controller. (See  
Fig. 39.)  
Occupancy Control  
The factory default configuration for the EconoMi$er IV control  
is occupied mode. Occupied mode is provided by the black  
jumper from terminal TR to terminal N. When unoccupied mode  
is desired, install a field-supplied timeclock function in place of  
the jumper between TR and N. (See Fig. 29.) When the timeclock  
contacts are closed, the EconoMi$er IV control will be in  
occupied mode. When the timeclock contacts are open (removing  
the 24-v signal from terminal N), the EconoMi$er IV will be in  
unoccupied mode.  
Damper Movement  
Damper movement from full open to full closed (or vice versa)  
1
takes 2 / minutes.  
2
Thermostats  
The EconoMi$er IV control works with conventional thermostats  
that have a Y1 (cool stage 1), Y2 (cool stage 2), W1 (heat stage  
1), W2 (heat stage 2), and G (fan). The EconoMi$er IV control  
does not support space temperature sensors. Connections are  
made at the thermostat terminal connection board located in the  
main control box.  
Typically the maximum ventilation rate will be about 5 to 10%  
more than the typical cfm required per person, using normal  
outside air design criteria.  
Demand Controlled Ventilation (DCV)  
When using the EconoMi$er IV for demand controlled  
ventilation, there are some equipment selection criteria which  
should be considered. When selecting the heat capacity and cool  
capacity of the equipment, the maximum ventilation rate must be  
evaluated for design conditions. The maximum damper position  
must be calculated to provide the desired fresh air.  
A proportional anticipatory strategy should be taken with the  
following conditions: a zone with a large area, varied occupancy,  
and equipment that cannot exceed the required ventilation rate at  
design conditions. Exceeding the required ventilation rate means  
the equipment can condition air at a maximum ventilation rate  
that is greater than the required ventilation rate for maximum  
occupancy. A proportional-anticipatory strategy will cause the  
19  
LED ON  
18  
D
17  
LED ON  
LED OFF  
16  
15  
14  
C
LED ON  
LED OFF  
B
13  
12  
LED ON  
LED OFF  
A
11  
10  
9
LED OFF  
85 90  
95  
fresh air supplied to increase as the room CO level increases  
100  
2
50  
55 60  
70 75  
40 45  
65  
80  
DEGREES FAHRENHEIT  
even though the CO set point has not been reached. By the time  
2
the CO level reaches the set point, the damper will be at  
2
C06035  
maximum ventilation and should maintain the set point.  
Fig. 36 --- Outside Air Temperature  
In order to have the CO sensor control the economizer damper in  
Changeover Set Points  
2
this manner, first determine the damper voltage output for  
minimum or base ventilation. Base ventilation is the ventilation  
required to remove contaminants during unoccupied periods. The  
following equation may be used to determine the percent of  
outside-air entering the building for a given damper position. For  
best results there should be at least a 10 degree difference in  
outside and return-air temperatures.  
ECONOMI$ER IV  
CONTROLLER  
ECONOMI$ER IV  
OA  
100  
RA  
100  
+ (TR x  
(TO x  
)
) =TM  
GROMMET  
T
O
= Outdoor-Air Temperature  
OA = Percent of Outdoor Air  
T = Return-Air Temperature  
RA = Percent of Return Air  
R
RETURN AIR TEMPERATURE  
SENSOR  
T
= Mixed-Air Temperature  
M
RETURN DUCT  
(FIELD-PROVIDED)  
Once base ventilation has been determined, set the minimum  
damper position potentiometer to the correct position.  
C06036  
Fig. 37 --- Return Air Temperature or Enthalpy  
Sensor Mounting Location  
23  
85  
90  
95 100 105 110  
(29) (32) (35) (38) (41) (43)  
46  
4
CONTROL CONTROL POINT  
4
CURVE  
APPROX. deg. F (deg. C)  
AT 50% RH  
80  
(27)  
42  
A
B
C
D
73 (23)  
70 (21)  
67 (19)  
63 (17)  
40  
8
3
6
75  
3
(24)  
4
3
32  
70  
(21)  
30  
RELATIVE HUMIDITY (%)  
28  
ENTHALPY BTU PER POUND DRY AIR  
0
0
0
1
26  
9
65  
80  
(18)  
4
70  
2
0
6
2
2
60  
50  
(16)  
0
2
0
4
A
8
55  
1
(13)  
B
30  
6
1
50  
(10)  
C
4
1
20  
2
45  
(7)  
D
1
40  
(4)  
0
1
35  
(2)  
A
B
C
D
HIGH LIMIT  
CURVE  
35  
(2)  
40  
45  
50  
55  
60  
65  
70  
75  
80  
85  
90  
95 100 105 110  
(4) (7) (10) (13) (16) (18) (21) (24) (27) (29) (32) (35) (38) (41) (43)  
APPROXIMATE DRY BULB TEMPERATURE--degrees F (degrees C)  
C06037  
Fig. 38 --- Enthalpy Changeover Set Points  
The same equation can be used to determine the occupied or  
maximum ventilation rate to the building. For example, an output  
of 3.6 volts to the actuator provides a base ventilation rate of 5%  
and an output of 6.7 volts provides the maximum ventilation rate  
of 20% (or base plus 15 cfm per person). Use Fig. 37 to  
TR1  
EXH  
Set  
10V  
TR  
N1  
N
2V  
EXH  
24  
Vac  
HOT  
24 Vac  
COM  
P1  
T1  
P
T
Min  
Pos  
determine the maximum setting of the CO sensor. For example,  
2
_
+
a 1100 ppm set point relates to a 15 cfm per person design. Use  
Open  
the 1100 ppm curve on Fig. 40 to find the point when the CO  
2
DCV  
Max  
10V  
sensor output will be 6.7 volts. Line up the point on the graph  
with the left side of the chart to determine that the range  
1
2
5
2V  
configuration for the CO sensor should be 1800 ppm. The  
2
AQ1  
AQ  
SO+  
SO  
SR+  
SR  
DCV  
EconoMi$er IV controller will output the 6.7 volts from the CO  
2
DCV  
Set  
10V  
sensor to the actuator when the CO concentration in the space is  
4
3
2
2V  
at 1100 ppm. The DCV set point may be left at 2 volts since the  
Free  
Cool  
CO sensor voltage will be ignored by the EconoMi$er IV  
EF1  
EF  
2
controller until it rises above the 3.6 volt setting of the minimum  
position potentiometer.  
C
D
B
A
Once the fully occupied damper position has been determined, set  
the maximum damper demand control ventilation potentiometer  
to this position. Do not set to the maximum position as this can  
result in over-ventilation to the space and potential high-humidity  
levels.  
C06038  
Fig. 39 --- EconoMi$er IV Control  
24  
CO SENSOR MAX RANGE SETTING  
2
6000  
5000  
4000  
3000  
2000  
1000  
0
800 ppm  
900 ppm  
1000 ppm  
1100 ppm  
2
3
4
5
6
7
8
DAMPER VOLTAGE FOR MAX VENTILATION RATE  
C06039  
Fig. 40 --- CO Sensor Maximum Range Setting  
2
CO Sensor Configuration  
2
Step 9 Adjust Evaporator--Fan Speed  
The CO sensor has preset standard voltage settings that can be  
2
Adjust evaporator-fan speed to meet jobsite conditions.  
selected anytime after the sensor is powered up. (See Table 7.)  
Tables 8 and 9 show fan rpm at motor pulley settings. Tables 10  
and 14 show maximum amp draw of belt-drive motor. Table 13  
shows sound data. Refer to Tables 15--34 for performance data.  
See Table 11 for accessory static pressure drop. See Fig. 41 for  
the Perfect Humiditysystem static pressure drops.  
Use setting 1 or 2 for Bryant equipment. (See Table 7.)  
1. Press Clear and Mode buttons. Hold at least 5 seconds  
until the sensor enters the Edit mode.  
2. Press Mode twice. The STDSET Menu will appear.  
Belt Drive Motors  
3. Use the Up/Down button to select the preset number. (See  
Table 7.)  
4. Press Enter to lock in the selection.  
Fan motor pulleys are factory set for speed shown in Table 1 or 2.  
Check pulley alignment and belt tension prior to start-up.  
To change fan speed:  
5. Press Mode to exit and resume normal operation.  
1. Shut off the unit power supply and tag disconnect.  
The custom settings of the CO sensor can be changed anytime  
2
after the sensor is energized. Follow the steps below to change the  
non-standard settings:  
2. Loosen the belt by loosening the fan motor mounting nuts.  
(See Fig. 42.)  
1. Press Clear and Mode buttons. Hold at least 5 seconds  
until the sensor enters the Edit mode.  
3. Loosen movable pulley flange setscrew. (See Fig. 43.)  
4. Screw movable flange toward fixed flange to increase  
speed and away from fixed flange to decrease speed.  
Increasing fan speed increases load on motor. Do not  
exceed maximum speed specified in Table 1 or 2.  
2. Press Mode twice. The STDSET Menu will appear.  
3. Use the Up/Down button to toggle to the NONSTD menu  
and press Enter.  
5. Set movable flange at nearest keyway of pulley hub and  
tighten setscrew. (See Table 1 or 2 for speed change for  
each full turn of pulley flange.)  
4. Use the Up/Down button to toggle through each of the  
nine variables, starting with Altitude, until the desired  
setting is reached.  
6. Adjust belt tension and align fan and motor pulleys per  
guidance below.  
NOTE: Once the required flange position is determined for the  
correct blower rpm, it is recommended (bu not required) that the  
variable pitch pulley be replaced with a corresponding size fixed  
sheave pulley.  
5. Press Mode to move through the variables.  
6. Press Enter to lock in the selection, then press Mode to  
continue to the next variable.  
Dehumidification of Fresh Air with DCV Control  
Information from ASHRAE indicates that the largest humidity  
load on any zone is the fresh air introduced. For some  
applications, a device such as an energy recovery unit can be  
added to reduce the moisture content of the fresh air being  
brought into the building when the enthalpy is high. In most  
cases, the normal heating and cooling processes are more than  
adequate to remove the humidity loads for most commercial  
applications.  
To align fan and motor pulleys, loosen fan pulley setscrews and  
slide fan pulley along fan shaft. Make angular alignment by  
loosening motor from mounting.  
Additional motor and fan alignment, as well as angular alignment  
can be made by loosening the four motor mounting bolts from  
the mounting plate.  
To adjust belt tension:  
If normal rooftop heating and cooling operation is not adequate  
for the outdoor humidity level, an energy recovery unit and/or a  
dehumidification option should be considered.  
1. Loosen the two motor mounting nuts as shown in Fig. 42.  
Some models may have a third mounting nut located on  
the opposite side of the fan motor mounting plate.  
2. Slide motor mounting plate away from fan scroll for  
1
proper belt tension ( / -in. deflection with 8 to 10 lb of  
2
force) and tighten mounting nuts.  
3. Adjust lock bolt and nut on mounting plate to secure  
motor in fixed position.  
25  
Table 7—CO Sensor Standard Settings  
2
VENTILATION  
ANALOG  
CO  
OPTIONAL  
RELAY  
2
RATE  
CONTROL RANGE RELAY SETPOINT HYSTERESIS  
SETTING  
EQUIPMENT  
OUTPUT  
OUTPUT  
(cfm/Person)  
(ppm)  
(ppm)  
(ppm)  
0-10V  
Proportional  
Proportional  
Exponential  
Proportional  
Proportional  
Exponential  
Exponential  
Proportional  
Proportional  
Any  
Any  
Any  
15  
0-2000  
1000  
50  
1
2
3
4
5
6
7
8
9
4-20 mA  
2-10V  
Interface w/Standard  
0-2000  
0-2000  
0-1100  
0- 900  
0-1100  
0- 900  
0-9999  
0-2000  
1000  
1100  
1100  
900  
50  
50  
7-20 mA  
Building Control System  
0-10V  
4-20 mA  
0-10V  
50  
4-20 mA  
0-10V  
20  
50  
4-20 mA  
Economizer  
0-10V  
15  
1100  
900  
50  
4-20 mA  
0-10V  
20  
50  
4-20 mA  
0-10V  
Health & Safety  
5000  
700  
500  
50  
4-20 mA  
Parking/Air Intakes/  
Loading Docks  
0-10V  
4-20 mA  
LEGEND  
ppm — Parts Per Million  
0.35  
0.3  
0.25  
0.2  
0.15  
0.1  
4 & 5 ton  
6 ton  
3 ton  
0.05  
0
0
4000  
1000  
3000  
2000  
5000  
6000  
C06133  
Fig. 41 --- Perfect Humidityt Adaptive Dehumidification System Static Pressure Drop (in. wg)  
C06134  
C06041  
Fig. 42 --- Belt Drive Motor Mounting  
Fig. 43 --- Indoor--Fan Pulley Adjustment  
26  
Table 8—581B and 581C Fan Rpm at Motor Pulley Setting With Standard Motor*  
MOTOR PULLEY TURNS OPEN  
UNIT  
1
1
1
1
1
1
0
/
2
1
1 /  
2
2 /  
3
3 /  
4
4 /  
5
5 /  
2
6
2
2
2
2
024  
036  
048  
060  
072  
936  
906  
876  
971  
1102  
1389  
1492  
846  
935  
1061  
1354  
1445  
816  
898  
1019  
1318  
1399  
786  
862  
978  
1283  
1352  
756  
826  
936  
1248  
1305  
726  
789  
895  
1212  
1259  
696  
753  
853  
1177  
1212  
666  
716  
812  
1141  
1166  
639  
680  
770  
1106  
1119  
1070  
1035  
1044  
1185  
1460  
1585  
1008  
1144  
1425  
1538  
*Approximate fan rpm shown (standard motor/drive).  
Table 9—581B Fan Rpm at Motor Pulley Setting With High-Static Motor*  
MOTOR PULLEY TURNS OPEN  
UNIT  
1
1
1
1
1
1
0
/
1
1 /  
2
2 /  
3
3 /  
4
4 /  
5
5 /  
6
2
2
2
2
2
2
1107  
1107  
036  
048  
060  
072  
1455  
1455  
1685  
1685  
1423  
1423  
1589  
1589  
1392  
1392  
1557  
1557  
1360  
1360  
1525  
1525  
1328  
1328  
1493  
1493  
1297  
1297  
1460  
1460  
1265  
1265  
1428  
1428  
1233  
1233  
1396  
1396  
1202  
1202  
1364  
1364  
1170  
1170  
1332  
1332  
1138  
1138  
1300  
1300  
1075  
1075  
*Approximate fan rpm shown (high-static motor/drive).  
Table 10—Evaporator-Fan Motor Data — Standard Motor  
UNIT  
581B  
581C  
UNIT  
PHASE  
MAXIMUM  
CONTINUOUS BHP*  
MAXIMUM  
OPERATING WATTS*  
MAXIMUM  
AMP DRAW  
UNIT VOLTAGE  
024  
Single  
Single  
0.58  
1.20  
580  
1000  
208/230  
2.0  
208/230  
208/230  
460  
4.9  
4.9  
2.2  
2.2  
4.9  
4.9  
2.2  
2.2  
7.0  
6.7  
3.0  
3.0  
6.7  
3.0  
3.0  
036  
Three  
Single  
Three  
Single  
Three  
1.20  
1.20  
1.20  
1.30  
2.40  
1000  
1000  
1000  
1455  
2120  
575  
208/230  
208/230  
460  
048  
575  
208/230  
208/230  
460  
060  
072  
575  
208/230  
460  
575  
Three  
2.40  
2120  
LEGEND  
Bhp — Brake Horsepower  
*Extensive motor and electrical testing on these units ensures that the full horsepower and watts range of the motors can be utilized with confidence. Using the  
fan motors up to the ratings shown in this table will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.  
Table 11—Accessory Static Pressure  
CFM  
COMPONENT  
600  
0.010  
800  
0.020  
1000  
0.035  
1250  
0.045  
1500  
0.065  
1750  
0.080  
0.100  
2000  
0.120  
0.125  
2250  
0.145  
0.150  
2500  
0.175  
0.180  
2750  
0.220  
0.225  
3000  
0.255  
0.275  
Vertical EconoMi$er IV  
Horizontal EconoMi$er IV  
Table 12—Evaporator-Fan Motor Data — High-Static Motors  
UNIT  
581B  
UNIT  
PHASE  
MAXIMUM  
CONTINUOUS BHP*  
MAXIMUM  
OPERATING WATTS*  
MAXIMUM  
AMP DRAW  
UNIT VOLTAGE  
208/230  
460  
575  
208/230  
460  
575  
208/230  
460  
575  
208/230  
460  
575  
6.7  
3.0  
3.0  
6.7  
3.0  
3.0  
8.6  
3.9  
3.9  
8.6  
3.9  
3.9  
036  
048  
060  
072  
Three  
Three  
Three  
Three  
2.40  
2.40  
2.90  
2.90  
2120  
2120  
2615  
2615  
LEGEND  
Bhp — Brake Horsepower  
*Extensive motor and electrical testing on these units ensures that the full horsepower and watts range of the motors can be utilized with confidence. Using the  
fan motors up to the ratings shown in this table will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.  
27  
Table 13—581B Outdoor Sound Power (Total Unit)  
ARI  
OCTAVE BANDS  
RATING  
(decibels)  
UNIT  
63  
125  
250  
500  
1000  
2000  
4000  
8000  
036, 048  
060, 072  
76  
80  
55.9  
59.1  
66.0  
68.9  
64.0  
68.7  
66.2  
71.9  
68.4  
74.0  
64.5  
68.9  
61.7  
65.7  
57.3  
59.0  
LEGEND  
ARI --- Air Conditioning and Refrigeration Institute  
Table 14—581C Outdoor Sound Power (Total Unit)  
ARI  
RATING  
(decibels)  
OCTAVEBANDS  
A ---  
WEIGHTED  
(db)  
UNIT  
63  
125  
250  
500  
1000  
2000  
4000  
8000  
024---048  
060  
76  
80  
76  
80  
55.9  
59.1  
66.0  
68.9  
64.0  
68.7  
66.2  
71.9  
68.4  
74.0  
64.5  
68.9  
61.7  
65.7  
57.3  
59.0  
GENERAL FAN PERFORMANCE NOTES  
1. Values include losses for filters, unit casing, and wet coils. See Table 11 and Fig. 38 for accessory/FIOP static pressure information.  
2. Extensive motor and electrical testing on these units ensures that the full range of the motor can be utilized with confidence. Using the  
fan motors up to the ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.  
See Tables 8 and 9 for additional information.  
3. Use of a field-supplied motor may affect wire sizing. Contact your Bryant representative to verify.  
4. Interpolation is permissible. Do not extrapolate.  
Table 15—Fan Performance 581C 024 — Vertical Discharge Units; Standard Motor (Belt Drive)**  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
0.1  
Rpm  
0.2  
Rpm  
0.4  
Rpm  
0.6  
Rpm  
0.8  
Rpm  
1.0  
(Cfm)  
Bhp  
Bhp  
Bhp  
Bhp  
Bhp  
Rpm  
878  
902  
937  
957  
981  
Bhp  
0.37  
0.41  
0.47  
0.53  
0.58  
600  
700  
800  
900  
1000  
500  
529  
547  
570  
599  
0.08  
0.09  
0.10  
0.13  
0.15  
531  
567  
592  
620  
650  
0.08  
0.09  
0.12  
0.14  
0.16  
607  
633  
660  
691  
717  
0.14  
0.16  
0.19  
0.22  
0.26  
713  
739  
761  
793  
818  
0.21  
0.24  
0.27  
0.32  
0.36  
788  
816  
845  
870  
894  
0.29  
0.32  
0.37  
0.42  
0.47  
28  
Table 16—Fan Performance 581B 036, 581C 036 — Vertical Discharge Units; Standard Motor  
(Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
900  
1000  
1100  
1200  
1300  
1400  
1500  
567  
599  
632  
666  
701  
737  
773  
0.15  
0.18  
0.22  
0.26  
0.31  
0.36  
0.42  
145  
177  
215  
257  
306  
361  
422  
688  
717  
747  
778  
810  
842  
875  
0.22  
0.27  
0.31  
0.37  
0.43  
0.49  
0.57  
222  
265  
313  
367  
426  
491  
564  
786  
814  
842  
871  
901  
931  
963  
0.30  
0.35  
0.41  
0.47  
0.54  
0.62  
0.70  
296  
349  
407  
471  
540  
616  
699  
871  
897  
925  
952  
981  
1010  
1040  
0.37  
0.43  
0.50  
0.57  
0.65  
0.74  
0.84  
368  
430  
498  
572  
651  
738  
831  
947  
972  
999  
1025  
1053  
1081  
1110  
0.44  
0.51  
0.59  
0.67  
0.76  
0.86  
0.96  
437  
509  
587  
670  
760  
856  
960  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
900  
1000  
1100  
1200  
1300  
1400  
1500  
1016  
1041  
1066  
1093  
1119  
1147  
1175  
0.51  
0.59  
0.68  
0.77  
0.87  
0.98  
1.09  
505  
587  
674  
767  
866  
972  
1086  
1080  
1104  
1129  
1155  
1181  
1208  
0.57  
0.67  
0.76  
0.87  
0.98  
1.09  
572  
662  
759  
861  
970  
1086  
1139  
1163  
1188  
1213  
1239  
0.64  
0.74  
0.85  
0.96  
1.08  
637  
737  
843  
955  
1073  
1195  
1219  
1243  
1268  
1294  
0.71  
0.81  
0.93  
1.05  
1.18  
702  
811  
925  
1047  
1175  
1249  
1272  
1296  
1321  
0.77  
0.89  
1.01  
1.14  
765  
883  
1007  
1137  
NOTES:  
LEGEND  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 1.20.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 680 to 1044 rpm. All other rpms require field-supplied  
drive.  
3. See general fan performance notes.  
Table 17—Fan Performance 581B 036, 581C 036 — Vertical Discharge Units; High-Static Motor  
(Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts  
Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
900  
1000  
1100  
1200  
1300  
1400  
1500  
567  
599  
632  
666  
701  
737  
773  
0.15  
0.18  
0.22  
0.26  
0.31  
0.36  
0.42  
145  
177  
215  
257  
306  
361  
422  
688  
717  
747  
778  
810  
842  
875  
0.22  
0.27  
0.31  
0.37  
0.43  
0.49  
0.57  
222  
265  
313  
367  
426  
491  
564  
786  
814  
842  
871  
901  
931  
963  
0.30  
0.35  
0.41  
0.47  
0.54  
0.62  
0.70  
296  
349  
407  
471  
540  
616  
699  
871  
897  
925  
952  
981  
0.37  
0.43  
0.50  
0.57  
0.65  
0.74  
0.84  
368  
430  
498  
572  
651  
738  
831  
947  
972  
999  
1025  
1053  
1081  
1110  
0.44  
0.51  
0.59  
0.67  
0.76  
0.86  
0.96  
437  
509  
587  
670  
760  
856  
960  
1010  
1040  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts  
Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
900  
1000  
1100  
1200  
1300  
1400  
1500  
1016  
1041  
1066  
1093  
1119  
1147  
1175  
0.51  
0.59  
0.68  
0.77  
0.87  
0.98  
1.09  
505  
587  
674  
767  
866  
972  
1086  
1080  
1104  
1129  
1155  
1181  
1208  
1235  
0.57  
0.67  
0.76  
0.87  
0.98  
1.09  
1.22  
572  
662  
759  
861  
970  
1139  
1163  
1188  
1213  
1239  
1265  
1292  
0.64  
0.74  
0.85  
0.96  
1.08  
1.21  
1.34  
637  
737  
843  
1195  
1219  
1243  
1268  
1294  
1320  
1346  
0.71  
0.81  
0.93  
1.05  
1.18  
1.32  
1.46  
702  
811  
925  
1047  
1175  
1310  
1452  
1249  
1272  
1296  
1321  
1346  
1371  
1397  
0.77  
0.89  
1.01  
1.14  
1.28  
1.43  
1.58  
765  
883  
1007  
1137  
1275  
1419  
1572  
955  
1073  
1199  
1332  
LEGEND  
1086  
1209  
NOTES:  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 2.40.  
3. See general fan performance notes.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 1075 to 1455 rpm. All other rpms require field-supplied  
drive.  
29  
Table 18—Fan Performance 581B 048, 581C 048 — Vertical Discharge Units; Standard Motor  
(Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts  
Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1200  
1300  
1400  
1500  
1600  
1700  
1800  
1900  
2000  
666  
701  
737  
773  
810  
847  
885  
923  
962  
0.26  
0.31  
0.36  
0.42  
0.49  
0.57  
0.66  
0.75  
0.85  
257  
306  
361  
422  
491  
567  
652  
745  
847  
778  
810  
842  
875  
909  
943  
978  
1014  
1049  
0.37  
0.43  
0.49  
0.57  
0.65  
0.73  
0.83  
0.94  
1.05  
367  
426  
491  
564  
643  
730  
826  
930  
1043  
871  
901  
931  
963  
994  
1027  
1060  
1093  
0.47  
0.54  
0.62  
0.70  
0.79  
0.89  
1.00  
1.11  
471  
540  
616  
699  
790  
888  
994  
1109  
952  
981  
0.57  
0.65  
0.74  
0.84  
0.94  
1.05  
1.16  
572  
651  
738  
831  
932  
1040  
1157  
1025  
1053  
1081  
1110  
1140  
1170  
0.67  
0.76  
0.86  
0.96  
1.08  
1.20  
670  
760  
856  
960  
1070  
1189  
1010  
1040  
1070  
1101  
1133  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts  
Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1200  
1300  
1400  
1500  
1600  
1700  
1800  
1900  
2000  
1093  
1119  
1147  
1175  
0.77  
0.87  
0.98  
1.09  
767  
866  
972  
1086  
1155  
1181  
1208  
0.87  
0.98  
1.09  
861  
970  
1086  
1213  
1239  
0.96  
1.08  
955  
1073  
1268  
1294  
1.05  
1.18  
1047  
1175  
1321  
1.14  
1137  
NOTES:  
LEGEND  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 2.40.  
3. See general fan performance notes.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 770 to 1185 rpm. All other rpms require field-supplied drive.  
30  
Table 19—Fan Performance 581B 048, 581C 048 — Vertical Discharge Units; High-Static Motor (Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
670  
760  
856  
960  
1070  
1189  
1316  
1453  
1598  
1200  
1300  
1400  
1500  
1600  
1700  
1800  
1900  
2000  
666  
701  
737  
773  
810  
847  
885  
923  
962  
0.26  
0.31  
0.36  
0.42  
0.49  
0.57  
0.66  
0.75  
0.85  
257  
306  
361  
422  
491  
567  
652  
745  
847  
778  
810  
842  
875  
909  
943  
978  
1014  
1049  
0.37  
0.43  
0.49  
0.57  
0.65  
0.73  
0.83  
0.94  
1.05  
367  
426  
491  
564  
643  
730  
826  
930  
1043  
871  
901  
931  
963  
994  
1027  
1060  
1093  
1127  
0.47  
0.54  
0.62  
0.70  
0.79  
0.89  
1.00  
1.11  
1.24  
471  
540  
616  
699  
790  
888  
994  
1109  
1233  
952  
981  
0.57  
0.65  
0.74  
0.84  
0.94  
1.05  
1.16  
1.29  
1.42  
572  
651  
738  
831  
932  
1040  
1157  
1283  
1417  
1025  
1053  
1081  
1110  
1140  
1170  
1200  
1231  
1263  
0.67  
0.76  
0.86  
0.96  
1.08  
1.20  
1.32  
1.46  
1.61  
1010  
1040  
1070  
1101  
1133  
1165  
1198  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1200  
1300  
1400  
1500  
1600  
1700  
1800  
1900  
2000  
1093  
1119  
1147  
1175  
1204  
1233  
1262  
1293  
1323  
0.77  
0.87  
0.98  
1.09  
1.21  
1.34  
1.48  
1.63  
1.79  
767  
866  
972  
1086  
1207  
1336  
1473  
1620  
1776  
1155  
1181  
1208  
1235  
1263  
1292  
1321  
1350  
1380  
0.87  
0.98  
1.09  
1.22  
1.35  
1.49  
1.64  
1.79  
1.96  
861  
970  
1213  
1239  
1265  
1292  
1320  
1348  
1376  
1405  
1434  
0.96  
1.08  
1.21  
1.34  
1.48  
1.63  
1.79  
1.96  
2.13  
955  
1073  
1199  
1332  
1472  
1622  
1779  
1946  
2123  
1268  
1294  
1320  
1346  
1373  
1401  
1428  
1457  
1486  
1.05  
1.18  
1.32  
1.46  
1.61  
1.77  
1.94  
2.12  
2.31  
1047  
1175  
1310  
1452  
1603  
1762  
1930  
2106  
2293  
1321  
1346  
1371  
1397  
1424  
1451  
1479  
1506  
1.14  
1.28  
1.43  
1.58  
1.74  
1.91  
2.09  
2.28  
1137  
1275  
1419  
1572  
1732  
1901  
2078  
2265  
1086  
1209  
1340  
1480  
1627  
1784  
1950  
NOTES:  
LEGEND  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 2.40.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 1075 to 1455 rpm. All other rpms require field-supplied  
drive.  
3. See general fan performance notes.  
Table 20—Fan Performance 581B 060, 581C 060 Single-Phase — Vertical Discharge Units;  
Standard Motor (Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1500  
1600  
1700  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
848  
887  
927  
0.42  
0.49  
0.57  
0.65  
0.75  
0.85  
0.97  
1.09  
1.23  
371  
433  
502  
579  
663  
757  
859  
970  
1091  
968  
1004  
1040  
1077  
1115  
1153  
1191  
1230  
0.55  
0.63  
0.71  
0.81  
0.91  
1.03  
1.15  
1.29  
486  
556  
633  
718  
811  
913  
1023  
1143  
1069  
1103  
1137  
1172  
1208  
1244  
0.68  
0.76  
0.86  
0.96  
1.08  
1.20  
600  
678  
763  
856  
957  
1066  
1158  
1190  
1223  
1257  
1291  
0.80  
0.90  
1.00  
1.12  
1.24  
715  
800  
892  
993  
1101  
1238  
1269  
1302  
1334  
0.94  
1.04  
1.15  
1.27  
831  
922  
1022  
1130  
967  
1007  
1048  
1090  
1131  
1173  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1500  
1600  
1700  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
1312  
1342  
1374  
1.07  
1.18  
1.30  
948  
1047  
1153  
1380  
1.20  
1067  
NOTES:  
LEGEND  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 1.30.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 1035 to 1460 rpm. All other rpms require field-supplied  
drive.  
3. See general fan performance notes.  
31  
Table 21—Fan Performance 581B 060, 581C 060 Three-Phase — Vertical Discharge Units;  
Standard Motor (Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
831  
922  
1500  
1600  
1700  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
848  
887  
927  
0.42  
0.49  
0.57  
0.65  
0.75  
0.85  
0.97  
1.09  
1.23  
1.38  
1.54  
371  
433  
502  
579  
663  
757  
859  
970  
968  
1004  
1040  
1077  
1115  
1153  
1191  
1230  
1269  
1309  
1349  
0.55  
0.63  
0.71  
0.81  
0.91  
1.03  
1.15  
1.29  
1.43  
1.59  
1.76  
486  
556  
633  
718  
811  
1069  
1103  
1137  
1172  
1208  
1244  
1281  
1318  
1355  
1393  
1431  
0.68  
0.76  
0.86  
0.96  
1.08  
1.20  
1.33  
1.48  
1.63  
1.80  
1.98  
600  
678  
763  
856  
957  
1066  
1185  
1313  
1451  
1600  
1759  
1158  
1190  
1223  
1257  
1291  
1326  
1361  
1397  
1433  
1470  
1506  
0.80  
0.90  
1.00  
1.12  
1.24  
1.37  
1.51  
1.67  
1.83  
2.01  
2.20  
715  
800  
892  
1238  
1269  
1302  
1334  
1368  
1401  
1435  
1470  
1505  
1540  
0.94  
1.04  
1.15  
1.27  
1.40  
1.54  
1.69  
1.86  
2.03  
2.21  
1022  
1130  
1246  
1371  
1505  
1649  
1803  
1967  
967  
993  
1007  
1048  
1090  
1131  
1173  
1215  
1258  
1101  
1219  
1345  
1481  
1627  
1784  
1951  
913  
1023  
1143  
1273  
1413  
1564  
1091  
1223  
1365  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1500  
1600  
1700  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
1312  
1342  
1374  
1406  
1438  
1471  
1504  
1538  
1572  
1.07  
1.18  
1.30  
1.43  
1.57  
1.72  
1.87  
2.04  
2.23  
948  
1047  
1153  
1268  
1391  
1523  
1665  
1816  
1978  
1380  
1411  
1441  
1473  
1504  
1536  
1569  
1602  
1.20  
1.32  
1.45  
1.58  
1.73  
1.89  
2.06  
2.23  
1067  
1173  
1286  
1407  
1537  
1677  
1825  
1984  
1445  
1474  
1505  
1535  
1567  
1598  
1630  
1.34  
1.46  
1.60  
1.74  
1.90  
2.06  
2.24  
1189  
1300  
1420  
1548  
1685  
1831  
1986  
1506  
1535  
1565  
1595  
1626  
1657  
1.48  
1.61  
1.75  
1.90  
2.06  
2.24  
1312  
1429  
1555  
1690  
1833  
1986  
1564  
1593  
1622  
1652  
1682  
1.62  
1.76  
1.91  
2.06  
2.23  
1437  
1560  
1692  
1833  
1983  
NOTES:  
LEGEND  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 2.40.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 1035 to 1460 rpm. All other rpms require field-supplied  
drive.  
3. See general fan performance notes.  
Table 22—Fan Performance 581B 060, 581C 060 — Vertical Discharge Units; High-Static Motor (Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
831  
922  
1500  
1600  
1700  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
848  
887  
927  
0.42  
0.49  
0.57  
0.65  
0.75  
0.85  
0.97  
1.09  
1.23  
1.38  
1.54  
371  
433  
502  
579  
663  
757  
859  
970  
968  
1004  
1040  
1077  
1115  
1153  
1191  
1230  
1269  
1309  
1349  
0.55  
0.63  
0.71  
0.81  
0.91  
1.03  
1.15  
1.29  
1.43  
1.59  
1.76  
486  
556  
633  
718  
811  
1069  
1103  
1137  
1172  
1208  
1244  
1281  
1318  
1355  
1393  
1431  
0.68  
0.76  
0.86  
0.96  
1.08  
1.20  
1.33  
1.48  
1.63  
1.80  
1.98  
600  
678  
763  
856  
957  
1066  
1185  
1313  
1451  
1600  
1759  
1158  
1190  
1223  
1257  
1291  
1326  
1361  
1397  
1433  
1470  
1506  
0.80  
0.90  
1.00  
1.12  
1.24  
1.37  
1.51  
1.67  
1.83  
2.01  
2.20  
715  
800  
892  
1238  
1269  
1302  
1334  
1368  
1401  
1435  
1470  
1505  
1540  
1576  
0.94  
1.04  
1.15  
1.27  
1.40  
1.54  
1.69  
1.86  
2.03  
2.21  
2.41  
1022  
1130  
1246  
1371  
1505  
1649  
1803  
1967  
2142  
967  
993  
1007  
1048  
1090  
1131  
1173  
1215  
1258  
1101  
1219  
1345  
1481  
1627  
1784  
1951  
913  
1023  
1143  
1273  
1413  
1564  
1091  
1223  
1365  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1500  
1600  
1700  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
1312  
1342  
1374  
1406  
1438  
1471  
1504  
1538  
1572  
1607  
1642  
1.07  
1.18  
1.30  
1.43  
1.57  
1.72  
1.87  
2.04  
2.23  
2.42  
2.63  
948  
1047  
1153  
1268  
1391  
1523  
1665  
1816  
1978  
2150  
2333  
1380  
1411  
1441  
1473  
1504  
1536  
1569  
1602  
1635  
1669  
1704  
1.20  
1.32  
1.45  
1.58  
1.73  
1.89  
2.06  
2.23  
2.42  
2.63  
2.84  
1067  
1173  
1286  
1407  
1537  
1677  
1825  
1984  
2153  
2332  
2523  
1445  
1474  
1505  
1535  
1567  
1598  
1630  
1663  
1695  
1729  
1.34  
1.46  
1.60  
1.74  
1.90  
2.06  
2.24  
2.42  
2.62  
2.83  
1189  
1300  
1420  
1548  
1685  
1831  
1986  
2152  
2328  
2515  
1506  
1535  
1565  
1595  
1626  
1657  
1688  
1720  
1753  
1.48  
1.61  
1.75  
1.90  
2.06  
2.24  
2.42  
2.61  
2.82  
1312  
1429  
1555  
1690  
1833  
1986  
2149  
2321  
2504  
1564  
1593  
1622  
1652  
1682  
1713  
1744  
1775  
1.62  
1.76  
1.91  
2.06  
2.23  
2.41  
2.60  
2.81  
1437  
1560  
1692  
1833  
1983  
2142  
2312  
2491  
NOTES:  
LEGEND  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 2.90.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 1300 to 1685 rpm. All other rpms require field-supplied drive.  
3. See general fan performance notes.  
32  
Table 23—Fan Performance 581C 072 — Vertical Discharge Units; Standard Motor (Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
2600  
2700  
2800  
2900  
3000  
967  
1008  
1049  
1091  
1133  
1176  
1218  
1261  
1305  
1348  
1392  
1435  
1479  
0.63  
0.72  
0.82  
0.93  
1.05  
1.18  
1.32  
1.47  
1.63  
1.80  
1.99  
2.19  
2.40  
563  
643  
731  
827  
933  
1047  
1170  
1304  
1448  
1602  
1768  
1945  
2135  
1075  
1112  
1151  
1189  
1229  
1268  
1308  
1349  
1390  
1431  
1472  
0.80  
0.91  
1.02  
1.14  
1.26  
1.40  
1.55  
1.72  
1.89  
2.07  
2.27  
715  
805  
903  
1170  
1205  
1241  
1278  
1315  
1352  
1390  
1429  
1468  
1507  
0.97  
1.08  
1.20  
1.33  
1.47  
1.62  
1.78  
1.96  
2.14  
2.33  
861  
960  
1255  
1289  
1323  
1358  
1393  
1429  
1466  
1503  
1540  
1.13  
1.25  
1.38  
1.52  
1.67  
1.84  
2.01  
2.19  
2.38  
1002  
1111  
1228  
1353  
1487  
1630  
1782  
1945  
2117  
1333  
1366  
1399  
1433  
1467  
1501  
1537  
1.28  
1.42  
1.56  
1.71  
1.87  
2.04  
2.23  
1139  
1258  
1384  
1519  
1662  
1815  
1977  
1068  
1183  
1308  
1441  
1584  
1736  
1900  
2073  
1008  
1123  
1247  
1380  
1523  
1677  
1841  
2016  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
2600  
2700  
2800  
2900  
3000  
1406  
1438  
1470  
1502  
1535  
1569  
1.43  
1.58  
1.73  
1.89  
2.06  
2.25  
1273  
1401  
1537  
1681  
1834  
1996  
1475  
1505  
1537  
1568  
1600  
1.58  
1.73  
1.90  
2.07  
2.25  
1403  
1541  
1686  
1840  
2002  
1540  
1569  
1600  
1631  
1.72  
1.89  
2.06  
2.25  
1531  
1678  
1833  
1996  
1601  
1630  
1660  
1.87  
2.04  
2.23  
1657  
1813  
1977  
1660  
1689  
1718  
2.00  
2.19  
2.38  
1780  
1945  
2118  
NOTES:  
LEGEND  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 2.40.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 1119 to 1585 rpm. All other rpms require field-supplied drive.  
3. See general fan performance notes.  
33  
Table 24—Fan Performance 581C 072 — Vertical Discharge Units; High-Static Motor (Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
2600  
2700  
2800  
2900  
3000  
967  
1008  
1049  
1091  
1133  
1176  
1218  
1261  
1305  
1348  
1392  
1435  
1479  
0.63  
0.72  
0.82  
0.93  
1.05  
1.18  
1.32  
1.47  
1.63  
1.80  
1.99  
2.19  
2.40  
563  
643  
731  
827  
933  
1047  
1170  
1304  
1448  
1602  
1768  
1945  
2135  
1075  
1112  
1151  
1189  
1229  
1268  
1308  
1349  
1390  
1431  
1472  
1514  
1556  
0.80  
0.91  
1.02  
1.14  
1.26  
1.40  
1.55  
1.72  
1.89  
2.07  
2.27  
2.48  
2.70  
715  
805  
903  
1170  
1205  
1241  
1278  
1315  
1352  
1390  
1429  
1468  
1507  
1547  
1587  
0.97  
1.08  
1.20  
1.33  
1.47  
1.62  
1.78  
1.96  
2.14  
2.33  
2.54  
2.76  
861  
960  
1255  
1289  
1323  
1358  
1393  
1429  
1466  
1503  
1540  
1578  
1616  
1.13  
1.25  
1.38  
1.52  
1.67  
1.84  
2.01  
2.19  
2.38  
2.59  
2.81  
1002  
1111  
1228  
1353  
1487  
1630  
1782  
1945  
2117  
2301  
2495  
1333  
1366  
1399  
1433  
1467  
1501  
1537  
1572  
1608  
1645  
1.28  
1.42  
1.56  
1.71  
1.87  
2.04  
2.23  
2.42  
2.62  
2.84  
1139  
1258  
1384  
1519  
1662  
1815  
1977  
2149  
2331  
2524  
1068  
1183  
1308  
1441  
1584  
1736  
1900  
2073  
2258  
2455  
1008  
1123  
1247  
1380  
1523  
1677  
1841  
2016  
2203  
2402  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
2600  
2700  
2800  
2900  
3000  
1406  
1438  
1470  
1502  
1535  
1569  
1603  
1638  
1673  
1.43  
1.58  
1.73  
1.89  
2.06  
2.25  
2.44  
2.64  
2.86  
1273  
1401  
1537  
1681  
1834  
1996  
2167  
2349  
2541  
1475  
1505  
1537  
1568  
1600  
1633  
1666  
1700  
1.58  
1.73  
1.90  
2.07  
2.25  
2.45  
2.65  
2.87  
1403  
1541  
1686  
1840  
2002  
2174  
2355  
2546  
1540  
1569  
1600  
1631  
1662  
1694  
1727  
1.72  
1.89  
2.06  
2.25  
2.44  
2.64  
2.86  
1531  
1678  
1833  
1996  
2167  
2348  
2539  
1601  
1630  
1660  
1690  
1721  
1752  
1.87  
2.04  
2.23  
2.42  
2.62  
2.84  
1657  
1813  
1977  
2149  
2330  
2520  
1660  
1689  
1718  
1747  
1778  
2.00  
2.19  
2.38  
2.59  
2.80  
1780  
1945  
2118  
2300  
2490  
NOTES:  
LEGEND  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 2.90.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 1300 to 1685 rpm. All other rpms require field-supplied drive.  
3. See general fan performance notes.  
Table 25—Fan Performance 581B 024 — Horizontal Discharge Units; Standard Motor (Belt Drive)**  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(Cfm)  
0.1  
Rpm  
0.2  
Rpm  
0.4  
Rpm  
0.6  
Rpm  
0.8  
Rpm  
1.0  
Bhp  
Bhp  
Bhp  
Bhp  
Bhp  
Rpm  
868  
892  
927  
947  
971  
Bhp  
0.37  
0.41  
0.47  
0.53  
0.58  
600  
700  
800  
900  
1000  
490  
519  
537  
560  
589  
0.08  
0.09  
0.10  
0.13  
0.15  
521  
557  
582  
610  
640  
0.08  
0.09  
0.12  
0.14  
0.16  
597  
623  
650  
681  
707  
0.14  
0.16  
0.19  
0.22  
0.26  
703  
729  
751  
783  
808  
0.21  
0.24  
0.27  
0.32  
0.36  
788  
816  
845  
870  
894  
0.29  
0.32  
0.37  
0.42  
0.47  
34  
Table 26—Fan Performance 581B 036, 581C 036 — Horizontal Discharge Units; Standard Motor  
(Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
900  
1000  
1100  
1200  
1300  
1400  
1500  
553  
582  
612  
643  
675  
707  
740  
0.14  
0.16  
0.20  
0.23  
0.28  
0.33  
0.38  
134  
163  
196  
234  
277  
326  
382  
681  
707  
734  
762  
790  
819  
849  
0.22  
0.26  
0.30  
0.34  
0.40  
0.45  
0.52  
221  
257  
297  
343  
394  
452  
515  
782  
807  
833  
859  
886  
913  
941  
0.32  
0.36  
0.41  
0.46  
0.52  
0.58  
0.66  
316  
358  
405  
458  
517  
581  
653  
870  
894  
919  
944  
969  
996  
1023  
0.42  
0.47  
0.52  
0.58  
0.65  
0.72  
0.80  
417  
466  
519  
579  
644  
716  
795  
948  
971  
995  
1020  
1044  
1070  
1096  
0.53  
0.58  
0.64  
0.71  
0.78  
0.86  
0.95  
526  
580  
639  
705  
777  
855  
941  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
900  
1000  
1100  
1200  
1300  
1400  
1500  
1019  
1042  
1065  
1089  
1113  
1138  
1163  
0.64  
0.70  
0.77  
0.84  
0.92  
1.01  
1.10  
640  
700  
765  
837  
915  
1000  
1092  
1084  
1107  
1130  
1153  
1177  
1201  
0.76  
0.83  
0.90  
0.98  
1.06  
1.15  
760  
825  
896  
974  
1058  
1149  
1146  
1168  
1190  
1213  
0.89  
0.96  
1.04  
1.12  
885  
956  
1032  
1115  
1203  
1225  
1247  
1.02  
1.10  
1.18  
1016  
1091  
1173  
1258  
1.16  
1152  
NOTES:  
LEGEND  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 1.20.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 680 to 1044 rpm. All other rpms require field-supplied drive.  
3. See general fan performance notes.  
Table 27—Fan Performance 581B 036, 581C 036 — Horizontal Discharge Units; High-Static Motor  
(Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
900  
1000  
1100  
1200  
1300  
1400  
1500  
553  
582  
612  
643  
675  
707  
740  
0.14  
0.16  
0.20  
0.23  
0.28  
0.33  
0.38  
134  
163  
196  
234  
277  
326  
382  
681  
707  
734  
762  
790  
819  
849  
0.22  
0.26  
0.30  
0.34  
0.40  
0.45  
0.52  
221  
257  
297  
343  
394  
452  
515  
782  
807  
833  
859  
886  
913  
941  
0.32  
0.36  
0.41  
0.46  
0.52  
0.58  
0.66  
316  
358  
405  
458  
517  
581  
653  
870  
894  
919  
944  
969  
996  
1023  
0.42  
0.47  
0.52  
0.58  
0.65  
0.72  
0.80  
417  
466  
519  
579  
644  
716  
795  
948  
971  
995  
1020  
1044  
1070  
1096  
0.53  
0.58  
0.64  
0.71  
0.78  
0.86  
0.95  
526  
580  
639  
705  
777  
855  
941  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
900  
1000  
1100  
1200  
1300  
1400  
1500  
1019  
1042  
1065  
1089  
1113  
1138  
1163  
0.64  
0.70  
0.77  
0.84  
0.92  
1.01  
1.10  
640  
700  
765  
837  
915  
1000  
1092  
1084  
1107  
1130  
1153  
1177  
1201  
1226  
0.76  
0.83  
0.90  
0.98  
1.06  
1.15  
1.25  
760  
825  
896  
1146  
1168  
1190  
1213  
1237  
1261  
1285  
0.89  
0.96  
1.04  
1.12  
1.21  
1.31  
1.41  
885  
956  
1032  
1115  
1205  
1303  
1407  
1203  
1225  
1247  
1270  
1293  
1317  
1341  
1.02  
1.10  
1.18  
1.27  
1.36  
1.47  
1.58  
1016  
1091  
1173  
1262  
1358  
1461  
1571  
1258  
1279  
1301  
1324  
1347  
1370  
1394  
1.16  
1.24  
1.33  
1.42  
1.52  
1.63  
1.75  
1152  
1232  
1319  
1413  
1514  
1623  
1740  
974  
1058  
1149  
1247  
NOTES:  
LEGEND  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 2.40.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 1075 to 1455 rpm. All other rpms require field-supplied drive.  
3. See general fan performance notes.  
35  
Table 28—Fan Performance 581B 048, 581C 048 — Horizontal Discharge Units; Standard Motor  
(Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1200  
1300  
1400  
1500  
1600  
1700  
1800  
1900  
2000  
643  
675  
707  
740  
773  
807  
841  
875  
910  
0.23  
0.28  
0.33  
0.38  
0.45  
0.52  
0.59  
0.68  
0.77  
234  
277  
326  
382  
444  
513  
589  
674  
767  
762  
790  
819  
849  
879  
910  
942  
974  
1006  
0.34  
0.40  
0.45  
0.52  
0.59  
0.67  
0.75  
0.85  
0.95  
343  
394  
452  
515  
586  
663  
749  
842  
944  
859  
886  
913  
941  
970  
0.46  
0.52  
0.58  
0.66  
0.73  
0.82  
0.91  
1.02  
1.13  
458  
517  
581  
653  
731  
817  
910  
1012  
1122  
944  
969  
996  
1023  
1050  
1078  
1106  
1135  
0.58  
0.65  
0.72  
0.80  
0.88  
0.98  
1.08  
1.19  
579  
644  
716  
795  
880  
973  
1074  
1184  
1020  
1044  
1070  
1096  
1123  
1150  
0.71  
0.78  
0.86  
0.95  
1.04  
1.14  
705  
777  
855  
941  
1034  
1134  
999  
1029  
1059  
1090  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1200  
1300  
1400  
1500  
1600  
1700  
1800  
1900  
2000  
1089  
1113  
1138  
1163  
1189  
0.84  
0.92  
1.01  
1.10  
1.20  
837  
915  
1000  
1092  
1191  
1153  
1177  
1201  
0.98  
1.06  
1.15  
974  
1058  
1149  
1213  
1.12  
1115  
NOTES:  
LEGEND  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 1.20.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 770 to 1185 rpm. All other rpms require field-supplied drive.  
3. See general fan performance notes.  
Table 29—Fan Performance 581B 048, 581C 048 — Horizontal Discharge Units; High-Static Motor  
(Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
705  
777  
855  
941  
1034  
1134  
1242  
1360  
1485  
1200  
1300  
1400  
1500  
1600  
1700  
1800  
1900  
2000  
643  
675  
707  
740  
773  
807  
841  
875  
910  
0.23  
0.28  
0.33  
0.38  
0.45  
0.52  
0.59  
0.68  
0.77  
234  
277  
326  
382  
444  
513  
589  
674  
767  
762  
790  
819  
849  
879  
910  
942  
974  
1006  
0.34  
0.40  
0.45  
0.52  
0.59  
0.67  
0.75  
0.85  
0.95  
343  
394  
452  
515  
586  
663  
749  
842  
944  
859  
886  
913  
941  
970  
0.46  
0.52  
0.58  
0.66  
0.73  
0.82  
0.91  
1.02  
1.13  
458  
517  
581  
653  
731  
817  
910  
1012  
1122  
944  
969  
996  
1023  
1050  
1078  
1106  
1135  
1165  
0.58  
0.65  
0.72  
0.80  
0.88  
0.98  
1.08  
1.19  
1.31  
579  
644  
716  
795  
880  
1020  
1044  
1070  
1096  
1123  
1150  
1177  
1205  
1234  
0.71  
0.78  
0.86  
0.95  
1.04  
1.14  
1.25  
1.37  
1.49  
999  
973  
1029  
1059  
1090  
1074  
1184  
1302  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1200  
1300  
1400  
1500  
1600  
1700  
1800  
1900  
2000  
1089  
1113  
1138  
1163  
1189  
1216  
1242  
1270  
1297  
0.84  
0.92  
1.01  
1.10  
1.20  
1.31  
1.42  
1.55  
1.68  
837  
915  
1153  
1177  
1201  
1226  
1252  
1277  
1303  
1330  
1357  
0.98  
1.06  
1.15  
1.25  
1.36  
1.48  
1.60  
1.73  
1.87  
974  
1058  
1149  
1247  
1353  
1468  
1590  
1721  
1862  
1213  
1237  
1261  
1285  
1310  
1335  
1361  
1387  
1414  
1.12  
1.21  
1.31  
1.41  
1.53  
1.65  
1.78  
1.92  
2.07  
1115  
1205  
1303  
1407  
1520  
1640  
1770  
1908  
2055  
1270  
1293  
1317  
1341  
1365  
1390  
1415  
1441  
1467  
1.27  
1.36  
1.47  
1.58  
1.70  
1.83  
1.96  
2.11  
2.26  
1262  
1358  
1461  
1571  
1690  
1817  
1953  
2098  
2252  
1324  
1347  
1370  
1394  
1418  
1442  
1467  
1493  
1.42  
1.52  
1.63  
1.75  
1.87  
2.01  
2.15  
2.30  
1413  
1514  
1623  
1740  
1865  
1998  
2140  
2292  
1000  
1092  
1191  
1299  
1414  
1538  
1672  
NOTES:  
LEGEND  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 2.40.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 1075 to 1455 rpm. All other rpms require field-supplied drive.  
3. See general fan performance notes.  
36  
Table 30—Fan Performance 581B 060, 581C 060 Single-Phase — Horizontal Discharge Units;  
Standard Motor (Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1500  
1600  
1700  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
800  
839  
879  
919  
960  
1001  
1043  
1085  
1127  
0.39  
0.46  
0.54  
0.63  
0.73  
0.84  
0.96  
1.09  
1.23  
350  
412  
483  
561  
648  
744  
850  
966  
1092  
904  
938  
974  
1010  
1047  
1085  
1123  
1162  
0.49  
0.57  
0.65  
0.75  
0.85  
0.96  
1.09  
1.22  
438  
505  
580  
663  
754  
855  
965  
1086  
999  
1030  
1062  
1095  
1129  
1163  
1199  
0.60  
0.68  
0.77  
0.87  
0.98  
1.09  
1.22  
535  
605  
684  
771  
867  
972  
1086  
1087  
1115  
1144  
1174  
1206  
1238  
0.72  
0.80  
0.90  
1.00  
1.11  
1.23  
640  
714  
796  
886  
986  
1095  
1169  
1195  
1221  
1250  
1279  
0.85  
0.93  
1.03  
1.14  
1.25  
753  
829  
914  
1008  
1111  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1500  
1600  
1700  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
1247  
1270  
1295  
1321  
0.98  
1.07  
1.17  
1.28  
873  
952  
1040  
1137  
1320  
1342  
1.13  
1.22  
1002  
1083  
1390  
1.28  
1137  
NOTES:  
LEGEND  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 1.30.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 1035 to 1460 rpm. All other rpms require field-supplied drive.  
3. See general fan performance notes.  
37  
Table 31—Fan Performance 581B 060, 581C 060 Three-Phase — Horizontal Discharge Units;  
Standard Motor (Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
753  
829  
1500  
1600  
1700  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
800  
839  
879  
919  
960  
1001  
1043  
1085  
1127  
1169  
1212  
0.39  
0.46  
0.54  
0.63  
0.73  
0.84  
0.96  
1.09  
1.23  
1.38  
1.55  
350  
412  
483  
561  
648  
744  
850  
966  
904  
938  
974  
0.49  
0.57  
0.65  
0.75  
0.85  
0.96  
1.09  
1.22  
1.37  
1.53  
1.70  
438  
505  
580  
663  
754  
855  
965  
1086  
1217  
1359  
1513  
999  
1030  
1062  
1095  
1129  
1163  
1199  
1235  
1272  
1310  
1348  
0.60  
0.68  
0.77  
0.87  
0.98  
1.09  
1.22  
1.36  
1.52  
1.68  
1.86  
535  
605  
684  
771  
867  
1087  
1115  
1144  
1174  
1206  
1238  
1271  
1305  
1340  
1375  
1412  
0.72  
0.80  
0.90  
1.00  
1.11  
1.23  
1.37  
1.51  
1.67  
1.84  
2.02  
640  
714  
796  
886  
986  
1095  
1213  
1342  
1482  
1633  
1796  
1169  
1195  
1221  
1250  
1279  
1309  
1340  
1372  
1405  
1439  
1473  
0.85  
0.93  
1.03  
1.14  
1.25  
1.38  
1.52  
1.67  
1.83  
2.00  
2.19  
914  
1010  
1047  
1085  
1123  
1162  
1201  
1241  
1281  
1008  
1111  
1224  
1346  
1479  
1623  
1778  
1945  
972  
1086  
1211  
1347  
1493  
1652  
1092  
1229  
1378  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1500  
1600  
1700  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
1247  
1270  
1295  
1321  
1348  
1377  
1406  
1437  
1468  
1500  
1533  
0.98  
1.07  
1.17  
1.28  
1.40  
1.53  
1.67  
1.83  
1.99  
2.17  
2.36  
873  
952  
1320  
1342  
1365  
1390  
1415  
1442  
1470  
1499  
1529  
1559  
1.13  
1.22  
1.32  
1.43  
1.56  
1.69  
1.83  
1.99  
2.16  
2.35  
1002  
1083  
1173  
1273  
1381  
1500  
1629  
1769  
1920  
2083  
1390  
1411  
1432  
1455  
1479  
1505  
1531  
1559  
1587  
1.28  
1.37  
1.48  
1.59  
1.72  
1.86  
2.00  
2.16  
2.34  
1137  
1221  
1313  
1415  
1526  
1648  
1780  
1923  
2077  
1457  
1476  
1497  
1518  
1541  
1565  
1591  
1617  
1.44  
1.54  
1.64  
1.76  
1.89  
2.03  
2.18  
2.34  
1280  
1365  
1459  
1563  
1677  
1801  
1936  
2082  
1522  
1540  
1559  
1579  
1601  
1624  
1648  
1.61  
1.71  
1.82  
1.93  
2.06  
2.21  
2.36  
1430  
1517  
1612  
1718  
1834  
1961  
2098  
1040  
1137  
1243  
1359  
1485  
1621  
1769  
1928  
2098  
NOTES:  
LEGEND  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 2.40.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 1035 to 1460 rpm. All other rpms require field-supplied drive.  
3. See general fan performance notes.  
Table 32—Fan Performance 581B 060, 581C 060 — Horizontal Discharge Units; High-Static Motor (Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
753  
829  
1500  
1600  
1700  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
800  
839  
879  
919  
960  
1001  
1043  
1085  
1127  
1169  
1212  
0.39  
0.46  
0.54  
0.63  
0.73  
0.84  
0.96  
1.09  
1.23  
1.38  
1.55  
350  
412  
483  
561  
648  
744  
850  
966  
904  
938  
974  
0.49  
0.57  
0.65  
0.75  
0.85  
0.96  
1.09  
1.22  
1.37  
1.53  
1.70  
438  
505  
580  
663  
754  
855  
965  
1086  
1217  
1359  
1513  
999  
1030  
1062  
1095  
1129  
1163  
1199  
1235  
1272  
1310  
1348  
0.60  
0.68  
0.77  
0.87  
0.98  
1.09  
1.22  
1.36  
1.52  
1.68  
1.86  
535  
605  
684  
771  
867  
1087  
1115  
1144  
1174  
1206  
1238  
1271  
1305  
1340  
1375  
1412  
0.72  
0.80  
0.90  
1.00  
1.11  
1.23  
1.37  
1.51  
1.67  
1.84  
2.02  
640  
714  
796  
886  
986  
1095  
1213  
1342  
1482  
1633  
1796  
1169  
1195  
1221  
1250  
1279  
1309  
1340  
1372  
1405  
1439  
1473  
0.85  
0.93  
1.03  
1.14  
1.25  
1.38  
1.52  
1.67  
1.83  
2.00  
2.19  
914  
1010  
1047  
1085  
1123  
1162  
1201  
1241  
1281  
1008  
1111  
1224  
1346  
1479  
1623  
1778  
1945  
972  
1086  
1211  
1347  
1493  
1652  
1092  
1229  
1378  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1500  
1600  
1700  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
1247  
1270  
1295  
1321  
1348  
1377  
1406  
1437  
1468  
1500  
1533  
0.98  
1.07  
1.17  
1.28  
1.40  
1.53  
1.67  
1.83  
1.99  
2.17  
2.36  
873  
952  
1320  
1342  
1365  
1390  
1415  
1442  
1470  
1499  
1529  
1559  
1591  
1.13  
1.22  
1.32  
1.43  
1.56  
1.69  
1.83  
1.99  
2.16  
2.35  
2.54  
1002  
1083  
1173  
1273  
1381  
1500  
1629  
1769  
1920  
2083  
2257  
1390  
1411  
1432  
1455  
1479  
1505  
1531  
1559  
1587  
1616  
1647  
1.28  
1.37  
1.48  
1.59  
1.72  
1.86  
2.00  
2.16  
2.34  
2.53  
2.73  
1137  
1221  
1313  
1415  
1526  
1648  
1780  
1923  
2077  
2243  
2421  
1457  
1476  
1497  
1518  
1541  
1565  
1591  
1617  
1644  
1672  
1.44  
1.54  
1.64  
1.76  
1.89  
2.03  
2.18  
2.34  
2.52  
2.71  
1280  
1365  
1459  
1563  
1677  
1801  
1936  
2082  
2239  
2408  
1522  
1540  
1559  
1579  
1601  
1624  
1648  
1673  
1699  
1726  
1.61  
1.71  
1.82  
1.93  
2.06  
2.21  
2.36  
2.53  
2.71  
2.90  
1430  
1517  
1612  
1718  
1834  
1961  
2098  
2246  
2406  
2579  
1040  
1137  
1243  
1359  
1485  
1621  
1769  
1928  
2098  
NOTES:  
LEGEND  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 2.90.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 1300 to 1685 rpm. All other rpms require field-supplied drive.  
3. See general fan performance notes.  
38  
Table 33—Fan Performance 581B 072 — Horizontal Discharge Units; Standard Motor (Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
2600  
2700  
2800  
2900  
3000  
913  
952  
992  
0.64  
0.73  
0.84  
0.95  
1.07  
1.21  
1.36  
1.51  
1.69  
1.87  
2.07  
2.28  
569  
652  
744  
844  
954  
1074  
1204  
1345  
1497  
1660  
1835  
2023  
1010  
1046  
1083  
1120  
1158  
1196  
1234  
1273  
1312  
1352  
1392  
0.80  
0.91  
1.02  
1.14  
1.27  
1.41  
1.57  
1.73  
1.91  
2.10  
2.31  
715  
805  
903  
1098  
1131  
1166  
1200  
1236  
1272  
1308  
1345  
1382  
1420  
0.98  
1.09  
1.21  
1.33  
1.47  
1.62  
1.78  
1.96  
2.14  
2.34  
869  
965  
1178  
1210  
1242  
1275  
1308  
1343  
1377  
1412  
1448  
1.16  
1.28  
1.40  
1.54  
1.68  
1.84  
2.01  
2.19  
2.38  
1032  
1134  
1245  
1365  
1495  
1634  
1784  
1945  
2117  
1252  
1282  
1313  
1345  
1377  
1409  
1443  
1.35  
1.48  
1.61  
1.75  
1.90  
2.07  
2.24  
1203  
1311  
1427  
1553  
1689  
1834  
1990  
1070  
1184  
1307  
1440  
1584  
1738  
1904  
2081  
1032  
1073  
1114  
1155  
1196  
1238  
1280  
1322  
1364  
1010  
1127  
1254  
1391  
1538  
1697  
1867  
2050  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
2600  
2700  
2800  
2900  
3000  
1322  
1351  
1380  
1411  
1441  
1473  
1.56  
1.68  
1.82  
1.97  
2.13  
2.30  
1382  
1495  
1617  
1748  
1890  
2041  
1388  
1416  
1444  
1473  
1503  
1.77  
1.90  
2.04  
2.20  
2.36  
1568  
1686  
1814  
1950  
2097  
1451  
1477  
1505  
1.98  
2.12  
2.27  
1762  
1885  
2017  
1510  
1536  
2.21  
2.35  
1962  
2090  
NOTES:  
LEGEND  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 2.40.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 1119 to 1585 rpm. All other rpms require field-supplied drive.  
3. See general fan performance notes.  
39  
Table 34—Fan Performance 581B 072 — Horizontal Discharge Units; High-Static Motor (Belt Drive)*  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
CFM  
0.2  
Bhp  
0.4  
Bhp  
0.6  
0.8  
Bhp  
1.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
2600  
2700  
2800  
2900  
3000  
913  
952  
992  
0.64  
0.73  
0.84  
0.95  
1.07  
1.21  
1.36  
1.51  
1.69  
1.87  
2.07  
2.28  
2.50  
569  
652  
744  
844  
954  
1074  
1204  
1345  
1497  
1660  
1835  
2023  
2224  
1010  
1046  
1083  
1120  
1158  
1196  
1234  
1273  
1312  
1352  
1392  
1432  
1472  
0.80  
0.91  
1.02  
1.14  
1.27  
1.41  
1.57  
1.73  
1.91  
2.10  
2.31  
2.53  
2.76  
715  
805  
903  
1098  
1131  
1166  
1200  
1236  
1272  
1308  
1345  
1382  
1420  
1458  
1496  
0.98  
1.09  
1.21  
1.33  
1.47  
1.62  
1.78  
1.96  
2.14  
2.34  
2.56  
2.78  
869  
965  
1178  
1210  
1242  
1275  
1308  
1343  
1377  
1412  
1448  
1484  
1521  
1.16  
1.28  
1.40  
1.54  
1.68  
1.84  
2.01  
2.19  
2.38  
2.59  
2.81  
1032  
1134  
1245  
1365  
1495  
1634  
1784  
1945  
2117  
2300  
2496  
1252  
1282  
1313  
1345  
1377  
1409  
1443  
1477  
1511  
1546  
1.35  
1.48  
1.61  
1.75  
1.90  
2.07  
2.24  
2.43  
2.63  
2.84  
1203  
1311  
1427  
1553  
1689  
1834  
1990  
2157  
2335  
2526  
1070  
1184  
1307  
1440  
1584  
1738  
1904  
2081  
2270  
2472  
1032  
1073  
1114  
1155  
1196  
1238  
1280  
1322  
1364  
1406  
1010  
1127  
1254  
1391  
1538  
1697  
1867  
2050  
2245  
2452  
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
CFM  
1.2  
Bhp  
1.4  
Bhp  
1.8  
Bhp  
2.0  
Bhp  
Rpm  
Watts  
Rpm  
Watts Rpm  
Bhp  
Watts  
Rpm  
Watts  
Rpm  
Watts  
1800  
1900  
2000  
2100  
2200  
2300  
2400  
2500  
2600  
2700  
2800  
2900  
3000  
1322  
1351  
1380  
1411  
1441  
1473  
1505  
1537  
1571  
1.56  
1.68  
1.82  
1.97  
2.13  
2.30  
2.48  
2.68  
2.88  
1382  
1495  
1617  
1748  
1890  
2041  
2203  
2376  
2560  
1388  
1416  
1444  
1473  
1503  
1533  
1564  
1.77  
1.90  
2.04  
2.20  
2.36  
2.54  
2.73  
1568  
1686  
1814  
1950  
2097  
2254  
2422  
1451  
1477  
1505  
1533  
1562  
1591  
1.98  
2.12  
2.27  
2.43  
2.60  
2.79  
1762  
1885  
2017  
2159  
2311  
2474  
1510  
1536  
1563  
1590  
1618  
2.21  
2.35  
2.51  
2.67  
2.85  
1962  
2090  
2227  
2374  
2532  
1568  
1593  
1619  
2.44  
2.59  
2.75  
2169  
2302  
2443  
NOTES:  
LEGEND  
1. Grey cells indicate field-supplied drive is required.  
2. Maximum continuous bhp is 2.90.  
Bhp — Brake Horsepower  
Watts — Input Watts to Motor  
*Motor drive range: 1300 to 1685 rpm. All other rpms require field-supplied drive.  
3. See general fan performance notes.  
40  
c. Make sure that condensate drain trap is filled with water  
to ensure proper drainage.  
PRE-START-UP  
d. Make sure that all tools and miscellaneous loose parts  
have been removed.  
!
WARNING  
START-UP  
FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD  
Failure to follow this warning could result in personal  
injury, death and/or property damage:  
Unit Preparation  
Make sure that the unit has been installed in accordance with  
installation instructions and applicable codes.  
1. Follow recognized safety practices and wear  
protective goggles when checking or servicing a  
refrigerant system.  
2. Do not operate the compressor or provide any  
electric power to the unit unless the compressor terminal  
cover is in place and secured.  
3. Do not remove the compressor terminal cover until  
all electrical sources are disconnected and tagged with  
lockout tags.  
4. Relieve all pressure from the system before touching  
or disturbing anything inside the terminal box if a  
refrigerant leak is suspected around the compressor  
terminals. Use accepted methods to recover the  
refrigerant.  
5. Never attempt to repair a soldered connection while  
the refrigerant system is under pressure.  
6. Do not use a torch to remove any component. The  
system contains oil and refrigerant under pressure. To  
remove a component, wear protective goggles and  
proceed as follows:  
Gas Piping  
Check gas piping for leaks.  
!
WARNING  
ELECTRICAL SHOCK HAZARD  
Failure to follow this warning could cause personal  
injury or death.  
Disconnect gas piping from unit when leak testing at  
pressure greater than / psig. Pressures greater than /  
psig will cause gas valve damage resulting in hazardous  
1
1
2
2
condition. If gas valve is subjected to pressure greater  
1
than  
/
2
psig, it must be replaced before use. When  
pressure testing field-supplied gas piping at pressures of  
/ psig or less, a unit connected to such piping must be  
isolated by manually closing the gas valve.  
1
2
a. Shut off electrical power to the unit and tag  
disconnect.  
b. Recover refrigerant to relieve all pressure  
from the system using both high-pressure  
and low-pressure ports.  
c. Cut component connection tubing with a  
tubing cutter, and remove the component  
from the unit.  
Return--Air Filters  
Make sure the correct filters are installed in the unit (See Table 1  
or 2). Do not operate the unit without return-air filters.  
Outdoor--Air Inlet Screens  
Outdoor-air inlet screen(s) must be in place before operating the  
unit.  
d. Carefully unsweat the remaining tubing  
stubs when necessary. Oil can ignite when  
exposed to a torch flame.  
Compressor Mounting  
Compressors are internally spring mounted. Do not loosen or  
remove the compressor holddown bolts.  
Internal Wiring  
Check all electrical connections in unit control boxes; tighten  
them as required.  
Proceed as follows to inspect and prepare the unit for initial  
start-up:  
1. Remove all access panels.  
Refrigerant Service Ports  
2. Read and follow instructions on all WARNING,  
CAUTION, and INFORMATION labels attached to, or  
shipped with, unit.  
Each unit system has 4 Schrader--type service ports: one on the  
suction line, one on the liquid line, and 2 on the compressor  
discharge line. Be sure that caps on the ports are tight. Two  
additional Schrader valves are located under the high--pressure  
and low--pressure switches, respectively.  
3. Make the following inspections:  
a. Inspect for shipping and handling damages such as  
broken lines, loose parts, or disconnected wires, etc.  
High Flow Refrigerant Valves  
b. Inspect for oil at all refrigerant tubing connections and on  
unit base. Detecting oil generally indicates a refrigerant  
leak. Leak-test all refrigerant tubing connections using  
electronic leak detector, halide torch, or liquid-soap  
solution.  
Two high flow valves are located on the hot gas tube coming out  
of the compressor and the suction tube going into the compressor.  
Large black plastic caps identify these valves. These valves have  
O--rings inside which screw the cap onto a brass body to prevent  
leaks. No field access to these valves is available at this time.  
Ensure the plastic caps remain on the valves and are tight or the  
possibility of refrigerant leakage could occur.  
c. Inspect all field-wiring and factory-wiring connections.  
Be sure that connections are completed and tight. Be sure  
that wires are not in contact with refrigerant tubing or  
sharp edges.  
d. Inspect coil fins. If damaged during shipping and  
handling, carefully straighten fins with a fin comb.  
4. Verify the following conditions:  
a. Make sure that condenser-fan blade are correctly  
positioned in fan orifice. See Condenser-Fan Adjustment  
section for more details.  
b. Make sure that air filter(s) is in place.  
41  
Table 35—Altitude Compensation*  
581B 036--072, 581C 024--060 Standard Units  
Compressor Rotation  
On 3-phase units be certain that the compressor is rotating in the  
proper direction. To determine whether or not compressor is  
rotating in the proper direction:  
72,000 AND  
150,000 BTUH  
115,000 BTUH  
NOMINAL INPUT  
NOMINAL INPUT  
1. Connect the service gauges to suction and discharge  
pressure fittings.  
ELEVATION  
(ft)  
Natural  
Liquid  
Propane  
Orifice  
Size†  
Natural  
Liquid  
Propane  
Orifice  
Size†  
Gas  
Gas  
2. Energize the compressor.  
3. The suction pressure should drop and the discharge  
pressure should rise, as is normal on any start-up.  
Orifice  
Size†  
Orifice  
Size†  
0-2,000  
2,000  
3,000  
4,000  
5,000  
6,000  
7,000  
8,000  
9,000  
10,000  
11,000  
12,000  
13,000  
14,000  
33  
36  
36  
37  
38  
40  
41  
42  
43  
44  
45  
46  
47  
48  
43  
44  
45  
45  
46  
47  
48  
49  
50  
50  
51  
52  
52  
53  
30  
31  
31  
32  
32  
34  
35  
36  
37  
39  
41  
42  
43  
44  
37  
39  
40  
41  
42  
43  
43  
44  
45  
46  
47  
48  
49  
50  
If the suction pressure does not drop and the discharge pressure  
does not rise to normal levels:  
1. Note that the indoor fan (006 and 007 three-phase units  
only) is probably also rotating in the wrong direction.  
2. Turn off power to the unit and tag disconnect.  
3. Reverse any two of the unit power leads.  
4. Turn on power to the unit and energize the compressor.  
The suction and discharge pressure levels should now move to  
their normal start-up levels.  
NOTE: When the compressor is rotating in the wrong direction,  
the unit makes more noise and does not provide cooling.  
*As the height above sea level increases, there is less oxygen per cubic  
foot of air. Therefore, heat input rate should be reduced at higher alti-  
tudes.  
Cooling  
Set the space thermostat to the OFF position. Set the system  
selector switch at COOL position and the fan switch at AUTO  
position. Adjust the thermostat to a setting below room  
temperature. The compressor starts when contactor closes.  
†Orifices available through your Bryant distributor.  
Table 36—Altitude Compensation* —  
581B 036--072, 581C 024--060 Low NOx Units  
Check the unit charge. Refer to Refrigerant Charge section.  
Reset the thermostat at a position above room temperature. The  
compressor will shut off. Evaporator fan will shut off after a  
30--second delay.  
60,000 AND  
120,000 BTUH  
90,000 BTUH  
NOMINAL INPUT  
NOMINAL INPUT  
ELEVATION  
Natural  
Liquid  
Propane  
Orifice  
Size†  
Natural  
Liquid  
Propane  
Orifice  
Size†  
To Shut Off Unit -- Set the system selector switch at OFF  
position. Resetting the thermostat at a position above room  
temperature shuts off the unit temporarily until the space  
temperature exceeds the thermostat setting. Units are equipped  
with a Cycle-LOCprotection device. The unit shuts down on  
any safety trip and remains off; an indicator light on the  
thermostat comes on. Check the reason for the safety trip.  
(ft)  
Gas  
Gas  
Orifice  
Size†  
Orifice  
Size  
0-2,000  
2,000  
3,000  
4,000  
5,000  
6,000  
7,000  
8,000  
9,000  
10,000  
11,000  
12,000  
13,000  
14,000  
38  
40  
41  
42  
43  
43  
44  
45  
46  
47  
48  
49  
50  
51  
45  
47  
48  
49  
49  
50  
50  
51  
52  
52  
53  
53  
54  
54  
32  
33  
35  
36  
37  
38  
39  
41  
42  
43  
44  
44  
46  
47  
42  
43  
43  
44  
45  
45  
46  
47  
48  
49  
50  
51  
52  
52  
Main Burners  
Main burners are factory set and should require no adjustment.  
TO CHECK ignition of main burners and heating controls, move  
thermostat set point above room temperature and verify that the  
burners light and evaporator fan is energized. Check heating  
effect, then lower the thermostat setting below the room  
temperature and verify that the burners and evaporator fan turn  
off.  
Refer to Tables 35 and 36 for the correct orifice to use at high  
altitudes.  
*As the height above sea level increases, there is less oxygen per cubic  
foot of air. Therefore, the input rate should be reduced at higher alti-  
tudes.  
†Orifices are available through your local Bryant distributor.  
42  
Heating  
Operating Sequence  
1. Purge gas supply line of air by opening union ahead of the  
Cooling -- Units Without Economizer  
gas valve. If gas odor is detected, tighten union and wait 5  
minutes before proceeding.  
When thermostat calls for cooling, terminals G and Y1 are  
energized. The indoor-fan contactor (IFC), reversing valve  
solenoid (RVS) and compressor contactor are energized and  
indoor-fan motor, compressor, and outdoor fan starts. The  
outdoor fan motor runs continuously while unit is cooling.  
2. Turn on electrical supply and manual gas valve.  
3. Set system switch selector at HEAT position and fan  
switch at AUTO or ON position. Set heating temperature  
lever above room temperature.  
Heating -- Units Without Economizer  
4. The induced-draft motor will start.  
When the thermostat calls for heating, terminal W1 is energized.  
To prevent thermostat short--cycling, the unit is locked into the  
Heating mode for at least 1 minute when W1 is energized. The  
induced--draft motor is energized and the burner ignition  
sequence begins. The indoor (evaporator) fan motor (IFM) is  
energized 45 seconds after a flame is ignited. On units equipped  
for two stages of heat, when additional heat is needed, W2 is  
energized and the high--fire solenoid on the main gas valve  
(MGV) is energized. When the thermostat is satisfied and W1 is  
deenergized, the IFM stops after a 45--second time--off delay.  
5. After a call for heating, the main burners should light  
within 5 seconds. If the burner does not light, then there is  
a 22-second delay before another 5-second try. If the  
burner still does not light, the time delay is repeated. If the  
burner does not light within 15 minutes, there is a lockout.  
To reset the control, break the 24 v power to W1.  
6. The evaporator-fan motor will turn on 45 seconds after  
burner ignition.  
7. The evaporator-fan motor will turn off in 45 seconds after  
the thermostat temperature is satisfied.  
Cooling -- Units With Economi$er IV  
When free cooling is not available, the compressors will be  
controlled by the zone thermostat. When free cooling is available,  
the outdoor-air damper is modulated by the EconoMi$er IV  
control to provide a 50_ to 55_F supply-air temperature into the  
zone. As the supply-air temperature fluctuates above 55_ or  
below 50_F, the dampers will be modulated (open or close) to  
bring the supply-air temperature back within the set point limits.  
Integrated EconoMi$er IV operation on single-stage units  
requires a 2-stage thermostat (Y1 and Y2).  
For EconoMi$er IV operation, there must be a thermostat call for  
the fan (G). This will move the damper to its minimum position  
during the occupied mode.  
If the increase in cooling capacity causes the supply--air  
temperature to drop below 45_F, then the outdoor--air damper  
position will be fully closed. If the supply--air temperature  
continues to fall, the outdoor--air damper will close. Control  
returns to normal once the supply--air temperature rises above  
48_F.  
8. Adjust airflow to obtain a temperature rise within the  
range specified on the unit nameplate.  
NOTE: The default value for the evaporator-fan motor on/off  
delay is 45 seconds. The Integrated Gas Unit Controller (IGC)  
modifies this value when abnormal limit switch cycles occur.  
Based upon unit operating conditions, the on delay can be  
reduced to 0 seconds and the off delay can be extended to  
180  
seconds. When one flash of the LED (light-emitting diode) is  
observed, the evaporator-fan on/off delay has been modified.  
If the limit switch trips at the start of the heating cycle during the  
evaporator on delay, the time period of the on delay for the next  
cycle will be 5 seconds less than the time at which the switch  
tripped. (Example: If the limit switch trips at 30 seconds, the  
evaporator-fan on delay for the next cycle will occur at 25  
seconds.) To prevent short-cycling, a 5-second reduction will  
only occur if a minimum of 10 minutes has elapsed since the last  
call for heating.  
The evaporator-fan off delay can also be modified. Once the call  
for heating has ended, there is a 10-minute period during which  
the modification can occur. If the limit switch trips during this  
period, the evaporator-fan off delay will increase by 15 seconds.  
A maximum of 9 trips can occur, extending the evaporator-fan off  
delay to 180 seconds.  
If optional power exhaust is installed, as the outdoor--air damper  
opens and closes, the power exhaust fans will be energized and  
deenergized.  
If field--installed accessory CO sensors are connected to the  
2
EconoMi$er IV control, a demand controlled ventilation strategy  
will begin to operate. As the CO level in the zone increases  
2
To restore the original default value, reset the power to the unit.  
above the CO set point, the minimum position of the damper  
2
To Shut Off Unit —Set system selector switch at off position.  
Resetting heating selector lever below room temperature will  
temporarily shut unit off until space temperature falls below  
thermostat setting.  
will be increased proportionally. As the CO level decreases  
2
because of the increase in fresh air, the outdoor--air damper will  
be proportionally closed. Damper position will follow the higher  
demand condition from DCV mode or free cooling mode.  
Safety Relief  
A soft solder joint at the suction line fitting provides pressure  
relief under abnormal temperature and pressure conditions.  
Damper movement from full closed to full open (or vice versa)  
will take between 1--1/2 and 2--1/2 minutes.  
If free cooling can be used as determined from the appropriate  
changeover command (switch, dry bulb, enthalpy curve,  
differential dry bulb, or differential enthalpy), a call for cooling  
(Y1 closes at the thermostat) will cause the control to modulate  
the dampers open to maintain the supply air temperature set point  
at 50_ to 55_F.  
Ventilation (Continuous Fan)  
Set fan and system selector switches at ON and OFF positions,  
respectively. Evaporator fan operates continuously to provide  
constant air circulation. When the evaporator--fan selector switch  
is turned to the OFF position, there is a 30--second delay before  
the fan turns off.  
As the supply air temperature drops below the set point range of  
50_ to 55_F, the control will modulate the outdoor--air dampers  
closed to maintain the proper supply--air temperature.  
43  
Heating -- Units With Economi$er IV  
When the room temperature calls for heat, the heating controls are  
energized as described in the Heating, Units Without Economizer  
section. During the occupied mode, whenever the indoor fan  
contactor is energized, the economizer damper moves to the  
minimum position.  
Units With Perfect HumidityAdaptive  
Dehumidification System  
Normal Design Operation  
When the rooftop operates under the normal sequence of  
operation, the compressors will cycle to maintain indoor  
conditions. (See Fig. 44.)  
The Perfect Humidity adaptive dehumidification system includes  
a factory-installed Motormaster® low ambient control to keep the  
head and suction pressure high, allowing normal design cooling  
mode operation down to 0°F.  
Subcooling Mode  
C06135  
C06136  
C06137  
Fig. 44 --- Perfect Humidityt Normal  
When subcooling mode is initiated, this will energize (close) the  
liquid line solenoid valve (LLSV) forcing the hot liquid  
refrigerant to enter into the subcooling coil. (See Fig. 45.)  
Design Cooling Operation  
As the hot liquid refrigerant passes through the subcooling/ reheat  
dehumidification coil, it is exposed to the cold supply airflow  
coming through the evaporator coil. The liquid is further  
subcooled to  
a
temperature approaching the evaporator  
leaving-air temperature. The liquid then enters a thermostatic  
expansion valve (TXV) where the liquid drops to a lower  
pressure. The TXV does not have a pressure drop great enough to  
change the liquid to a 2-phase fluid, so the liquid then enters the  
Acutroldevice at the evaporator coil.  
The liquid enters the evaporator coil at a temperature lower than  
in standard cooling operation. This lower temperature increases  
the latent capacity of the rooftop unit. The refrigerant passes  
through the evaporator and is turned into a vapor. The air passing  
over the evaporator coil will become colder than during normal  
operation. However, as this same air passes over the subcooling  
coil, it will be slightly warmed, partially reheating the air.  
Subcooling mode operates only when the outside air  
temperature is warmer than 40_F. A factory-installed temperature  
switch located in the condenser section will lock out subcooling  
mode when the outside temperature is cooler than 40_F.  
The scroll compressors are equipped with crankcase heaters to  
provide protection for the compressors due to the additional  
refrigerant charge required by the subcooling/reheat coil.  
Fig. 45 --- Perfect Humidity Subcooling  
Mode Operation  
When in subcooling mode, there is a slight decrease in system  
total gross capacity (5% less), a lower gross sensible capacity  
(20% less), and a greatly increased latent capacity (up to 40%  
more).  
Hot Gas Reheat Mode  
When the humidity levels in the space require humidity control, a  
hot gas solenoid valve (specific to hot gas reheat mode only) will  
open to bypass a portion of hot gas refrigerant around the  
condenser coil. (See Fig. 46.)  
This hot gas will mix with liquid refrigerant leaving the  
condenser coil and flow to the subcooling/reheat  
dehumidification coil. Now the conditioned air coming off the  
evaporator will be cooled and dehumidified, but will be warmed  
to neutral conditions (72_F to 75_F) by the subcooling/reheat  
dehumidification coil.  
Fig. 46 --- Perfect Humidity Hot Gas  
Reheat Mode Operation  
See Table 37 for the Perfect Humidity adaptive dehumidification  
system sequence of operation.  
44  
Table 37—Perfect Humidity Adaptive Dehumidification System Sequence of Operation and  
System Response — Single Compressor Unit (581C 024--060, 581B 036--072)  
THERMOSTAT INPUT  
ECONOMIZER FUNCTION  
581B,C UNIT OPERATION  
H
Y1  
Y2  
OAT. < Economizer Set Point  
Economizer  
Comp. 1  
Subcooling Mode  
Hot Gas Reheat Mode  
Normal Operation  
Off  
On  
On  
On  
On  
On  
On  
On  
On  
On  
Off  
On  
Off  
On  
Off  
Off  
No  
No  
Yes  
Yes  
No  
Off  
Off  
On  
On  
Off  
On  
On  
On  
On  
On  
Yes  
Yes  
Yes  
No  
No  
No  
No  
Yes  
Yes  
No  
NOTE: On a thermostat call for W1, all cooling and dehumidification will be off.  
LEGEND  
OAT --- Outdoor Air Temperature  
The net effect of the rooftop when in hot gas reheat mode is to  
provide nearly all latent capacity removal from the space when  
sensible loads diminish (when outdoor temperature conditions are  
moderate). When in hot gas reheat mode, the unit will operate to  
provide mostly latent capacity and extremely low sensible heat  
ratio capability.  
One--Row Coils  
Wash coil with commercial coil cleaner. It is not necessary to  
remove top panel.  
2-Row Coils  
Clean coil as follows:  
1. Turn off unit power, tag disconnect.  
2. Remove top panel screws on condenser end of unit.  
Similar to the subcooling mode of operation, hot gas reheat mode  
operates only when the outside air temperature is warmer than  
40_F. Below this temperature, a factory installed outside air  
temperature switch will lockout this mode of operation.  
3. Remove condenser coil corner post. (See Fig. 47.) To hold  
top panel open, place coil corner post between top panel  
and center post. (See Fig. 48.)  
SERVICE  
!
WARNING  
ELECTRICAL SHOCK HAZARD  
Failure to follow this warning could cause personal  
injury or death.  
When sevicing unit, shut off all electrical power to unit  
and install lockout tag.  
Step 1 Cleaning  
Inspect unit interior at the beginning of heating and cooling  
season and as operating conditions require.  
Evaporator Coil  
1. Turn unit power off, tag disconnect. Remove evaporator  
coil access panel.  
2. If economizer or two-position damper is installed, remove  
economizer by disconnecting Molex plug and  
removing mounting screws.  
C06044  
Fig. 47 --- Cleaning Condenser Coil  
3. Slide filters out of unit.  
4. Clean coil using a commercial coil cleaner or dishwasher  
detergent in a pressurized spray canister. Wash both sides  
of coil and flush with clean water. For best results,  
back-flush toward return-air section to remove foreign  
material. Flush condensate pan after completion.  
5. Reinstall economizer and filters.  
6. Reconnect wiring.  
7. Replace access panels.  
Condenser Coil  
Inspect coil monthly. Clean condenser coil annually, and as  
required by location and outdoor air conditions.  
C06045  
Fig. 48 --- Propping Up Top Panel  
45  
UNIT  
FAN HEIGHT (in.) - A  
024-060 and 072 (208/230 v)  
072 (460 v)  
2.75  
3.50  
C06138  
Fig. 50 --- Condenser--Fan Adjustment  
Step 4 EconoMi$er IV Adjustment  
Refer to Optional EconoMi$er IV section.  
Step 5 Evaporator Fan Belt Inspection  
Check condition of evaporator belt or tension during heating and  
cooling inspections or as conditions require. Replace belt or  
adjust as necessary.  
C06046  
Fig. 49 --- Separating Coil Sections  
4. Remove screws securing coil to compressor plate and  
compressor access panel.  
Step 6 High Pressure Switch  
The high-pressure switch contains a Schrader core depressor, and  
is located on the compressor hot gas line. This switch opens at  
428 psig and closes at 320 psig. No adjustments are necessary.  
5. Remove fastener holding coil sections together at return  
end of condenser coil. Carefully separate the outer coil  
section 3 to 4 in. from the inner coil section. (See Fig. 49.)  
6. Use a water hose or other suitable equipment to flush  
down between the 2 coil sections to remove dirt and  
debris. Clean the outer surfaces with a stiff brush in the  
normal manner.  
Step 7 Loss--of--Charge Switch  
The loss-of-charge switch contains a Schrader core depressor, and  
is located on the compressor liquid line. This switch opens at 7  
psig and closes at 22 psig. No adjustments are necessary.  
7. Secure inner and outer coil rows together with  
field-supplied fastener.  
a
Step 8 Freeze--Stat  
8. Reposition the outer coil section and remove the coil  
corner post from between the top panel and center post.  
Reinstall the coil corner post and replace all screws.  
The freeze-stat is a bimetal temperature-sensing switch that is  
located on the “hair-pin” end of the evaporator coil. The switch  
protects the evaporator coil from freeze-up due to lack of airflow.  
The switch opens at 30_F and closes at 45_F. No adjustments are  
necessary.  
Condensate Drain  
Check and clean each year at the start of the cooling season. In  
winter, keep the drain dry or protect it against freeze-up.  
Filters  
Step 9 Refrigerant Charge  
Amount of refrigerant charge is listed on unit nameplate (also  
refer to Table 1). Refer to HVAC Servicing Procedures literature  
available at your local distributor and the following procedures.  
Unit panels must be in place when unit is operating during  
charging procedure. Unit must operate a minimum of 10 minutes  
before checking or adjusting refrigerant charge.  
An accurate superheat, thermocouple-type or thermistor-type  
thermometer, and a gauge manifold are required when using the  
superheat charging method for evaluating the unit charge. Do not  
use mercury or small dial-type thermometers because they are not  
adequate for this type of measurement.  
Clean or replace at the start of each heating and cooling season, or  
more often if operating conditions require it. Replacement filters  
must be the same dimensions as the original filters.  
Outdoor--Air Inlet Screens  
Clean the screens with steam or hot water and a mild detergent.  
Do not use disposable filters in place of screens.  
Step 2 Lubrication  
Compressor  
The compressor is charged with the correct amount of oil at the  
factory.  
No Charge  
Fan Motor Bearings  
Use standard evacuating techniques. After evacuating system to  
500 microns, weigh in the specified amount of refrigerant. (Refer  
to Table 1 or 2 and unit information plate.)  
Fan motor bearings are permanently lubricated. No further  
lubrication is required. No lubrication of condenser-fan or  
evaporator-fan motors is required.  
Step 3 Condenser--Fan Adjustment  
Shut off unit power supply. Remove condenser-fan assembly  
(grille, motor, motor cover, and fan) and loosen fan hub  
setscrews. Adjust fan height as shown in Fig. 50. Tighten  
setscrews and replace condenser-fan assembly.  
46  
Low Charge Cooling  
Using Cooling Charging Charts, Fig. 51--54 and 59--62, vary  
refrigerant until the conditions of the charts are met. Note the  
charging charts are different from type normally used. Charts are  
based on charging the units to the correct superheat for the  
various operating conditions. Accurate pressure gauge and  
temperature sensing device are required. Connect the pressure  
gauge to the service port on the suction line. Mount the  
temperature sensing device on the suction line and insulate it so  
that outdoor ambient temperature does not affect the reading.  
Indoor-air cfm must be within the normal operating range of the  
unit.  
Perfect HumiditySystem Charging  
The system charge for units with the Perfect Humidity adaptive  
dehumidification system is greater than that of the standard unit  
alone. The charge for units with this option is indicated on the  
unit nameplate drawing. Also refer to Fig. 55--58. To charge  
systems using the Perfect Humidity adaptive dehumidification  
system, fully evacuate, recover, and recharge the system to the  
nameplate specified charge level. To check or adjust refrigerant  
charge on systems using the Perfect Humidity adaptive  
dehumidification system, charge per Fig. 55--58.  
C06140  
Fig. 52 --- Cooling Charging Chart,  
Standard 581B 048  
C06139  
Fig. 51 --- Cooling Charging Chart,  
Standard 581B 036  
C06141  
Fig. 53 --- Cooling Charging Chart,  
Standard 581B 060  
47  
C06142  
Fig. 54 --- Cooling Charging Chart,  
Standard 581B 072  
C06144  
Fig. 56 --- Cooling Charging Chart, 581B 048 with  
Optional Perfect Humidity Adaptive Dehumidification  
System  
NOTE: When using the charging charts, it is important that only  
the subcooling/reheat dehumidification coil liquid line solenoid  
valve be energized. The subcooling/reheat dehumidification coil  
liquid line solenoid valve MUST be energized to use the charging  
charts and the outdoor motor speed controller jumpered to run the  
fan at full speed.  
The charts reference a liquid pressure (psig) and temperature at a  
point between the condenser coil and the subcooling/reheat  
dehumidification coil. A tap is provided on the unit to measure  
liquid pressure entering the subcooling/reheat dehumidification  
coil.  
IMPORTANT: The subcooling mode charging charts (Fig.  
55--58) are to be used ONLY with units having the Perfect  
Humidity adaptive dehumidification system. DO NOT use  
standard charge (Fig. 51--54 and 59--62) for units with Perfect  
Humidity system, and DO NOT use Fig. 55--58 for standard  
units.  
C06143  
Fig. 55 --- Cooling Charging Chart, 581B 036 with  
Optional Perfect Humidity Adaptive Dehumidification  
System  
48  
To Use Cooling Charging Chart, Standard Unit  
Take the outdoor ambient temperature and read the suction  
pressure gauge. Refer to charts to determine what suction  
temperature should be. If suction temperature is high, add  
refrigerant. If suction temperature is low, carefully recover some  
of the charge. Recheck the suction pressure as charge is adjusted.  
Example (Fig. 52):  
Outdoor Temperature . . . . . . . . . . . . . . . . . . . . . . . . . 75°F  
Suction Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 psig  
Suction Temperature should be . . . . . . . . . . . . . . . . . . 48°F  
(Suction temperature may vary ± 5°F.)  
If a charging device is used, temperature and pressure readings  
must be accomplished using the charging charts.  
To Use Cooling Charging Charts, Units With Perfect  
Humidityt Adaptive Dehumidification System  
Refer to charts (Fig. 55--58) to determine the proper leaving  
condenser pressure and temperature.  
Example (Fig. 55):  
Leaving Condenser Pressure . . . . . . . . . . . . . . . . . 250 psig  
Leaving Condenser Temperature . . . . . . . . . . . . . . . 105°F  
C06145  
Fig. 57 --- Cooling Charging Chart, 581B 048 with  
NOTE: When using the charging charts, it is important that only  
the subcooling/reheat dehumidification coil liquid line solenoid  
valve be energized. The subcooling/reheat dehumidification coil  
liquid line solenoid valve MUST be energized to use the charging  
charts and the outdoor motor speed controller jumpered to run the  
fan at full speed.  
Optional Perfect Humidity Adaptive Dehumidification  
System  
Step 10 Flue Gas Passageways  
To inspect the flue collector box and upper areas of the heat  
exchanger:  
1. Remove the combustion blower wheel and motor  
assembly according to directions in Combustion-Air  
Blower section below.  
2. Remove the 3 screws holding the blower housing to the  
flue cover.  
3. Remove the flue cover to inspect the heat exchanger.  
4. Clean all surfaces as required using a wire brush.  
C06146  
Fig. 58 --- Cooling Charging Chart, 581B 072 with  
Optional Perfect Humidity Adaptive Dehumidification  
System  
49  
F
C
581C - 2 TON CHARGING CHART  
Suction Line Temperature (deg C)  
125 52  
115 46  
105 41  
95  
85  
75  
35  
29  
24  
5.5  
10.5  
15.5  
20.5  
25.5  
105.0  
100.0  
95.0  
90.0  
85.0  
80.0  
75.0  
70.0  
65.0  
698.0  
648.0  
598.0  
548.0  
498.0  
448.0  
42  
52  
62  
72  
Suction Line Temp (deg F)  
C06148  
Fig. 59 --- Cooling Charging Chart,  
Standard 581C 024  
F
C
581C -- 3 TON CHARGING CHART  
115 46  
105 41  
95  
85  
75  
35  
29  
24  
Suction Line Temperature (deg C)  
6.1  
11.1  
16.1  
21.1  
95.0  
85.0  
75.0  
65.0  
648.2  
598.2  
548.2  
498.2  
448.2  
43  
48  
53  
58  
63  
68  
73  
78  
Suction Line Temp (deg F)  
C06149  
Fig. 60 --- Cooling Charging Chart,  
Standard 581C 036  
50  
F
C
115 46  
105 41  
581C -- 4 TON CHARGING CHART  
95  
85  
75  
35  
29  
24  
Suction Line Temperature (deg C)  
5.6  
10.6  
15.6  
20.6  
25.6  
692.0  
642.0  
592.0  
542.0  
492.0  
97.0  
87.0  
77.0  
67.0  
42  
47  
52  
57  
62  
67  
72  
77  
Suction Line Temp (deg F)  
C06150  
Fig. 61 --- Cooling Charging Chart,  
Standard 581C 048  
F
C
581C -- 5 TON CHARGING CHART  
115 46  
105 41  
95  
85  
75  
35  
29  
24  
Suction Line Temperature (deg C)  
0.0  
5.0  
10.0  
15.0  
20.0  
25.0  
810.0  
710.0  
610.0  
510.0  
410.0  
310.0  
115.0  
105.0  
95.0  
85.0  
75.0  
65.0  
55.0  
42  
47  
52  
57  
62  
67  
72  
77  
Suction Line Temp (deg F)  
C06151  
Fig. 62 --- Cooling Charging Chart,  
Standard 581C 060  
51  
Step 11 Combustion--Air Blower  
Step 14 Main Burners  
At the beginning of each heating season, inspect for deterioration  
or blockage due to corrosion or other causes. Observe the main  
burner flames and adjust, if necessary.  
Clean periodically to ensure proper airflow and heating  
efficiency. Inspect blower wheel every fall and periodically  
during heating season. For the first heating season, inspect blower  
wheel bimonthly to determine proper cleaning frequency.  
To inspect blower wheel, remove draft hood and screen. Shine a  
flashlight into opening to inspect wheel. If cleaning is required,  
remove motor and wheel as follows:  
!
CAUTION  
FURNACE DAMAGE HAZARD  
1. Slide burner access panel out.  
Failure to follow this caution may result in reduced furnace  
life.  
2. Remove the 5 screws that attach induced-draft motor  
assembly to the vestibule cover.  
When servicing gas train, do not hit or plug orifice spuds.  
3. Slide the motor and blower wheel assembly out of the  
blower housing. The blower wheel can be cleaned at this  
point. If additional cleaning is required, continue with  
Steps 4 and 5.  
4. To remove blower from the motor shaft, remove  
2 setscrews.  
5. To remove motor, remove the 4 screws that hold the  
motor to mounting plate. Remove the motor cooling fan  
by removing one setscrew. Then remove nuts that hold  
motor to mounting plate.  
Removal and Replacement of Gas Train  
(See Fig. 63 and 64)  
1. Shut off manual gas valve.  
2. Shut off power to unit, tag disconnect.  
3. Remove compressor access panel.  
4. Slide out burner compartment side panel.  
5. Disconnect gas piping at unit gas valve.  
6. Remove wires connected to gas valve. Mark each wire.  
6. To reinstall, reverse the procedure outlined above.  
7. Remove induced-draft motor, igniter, and sensor wires at  
the Integrated Gas Unit Controller (IGC).  
Step 12 Limit Switch  
Remove blower access panel (Fig. 8). Limit switch is located on  
the fan deck.  
8. Remove the 2 screws that attach the burner rack to the  
vestibule plate.  
9. Remove the gas valve bracket.  
Step 13 Burner Ignition  
10. Slide the burner tray out of the unit (Fig. 64).  
11. To reinstall, reverse the procedure outlined above.  
12. Reinstall burners on rack.  
Unit is equipped with a direct spark ignition 100% lockout  
system. Integrated Gas Unit Controller (IGC) is located in the  
control box (Fig. 13). A single LED on the IGC provides a visual  
display of operational or sequential problems when the power  
supply is uninterrupted. The LED can be observed through the  
viewport. When a break in power occurs, the IGC will be reset  
(resulting in a loss of fault history) and the evaporator fan on/off  
times delay will be reset. During servicing, refer to the label on  
the control box cover or Table 39 for an explanation of LED error  
code descriptions.  
INDUCED-  
DRAFT  
MOTOR  
ROLLOUT  
SWITCH  
MOUNTING  
PLATE  
If lockout occurs, unit may be reset by interrupting power supply  
to unit for at least 5 seconds.  
BURNER  
SECTION  
FLUE  
EXHAUST  
Table 38—LED Error Code Description*  
VESTIBULE  
PLATE  
LED INDICATION  
ON  
ERROR CODE DESCRIPTION  
Normal Operation  
Hardware Failure  
Evaporator Fan On/Off Delay Modified  
Limit Switch Fault  
Flame Sense Fault  
4 Consecutive Limit Switch Faults  
Ignition Lockout Fault  
Induced-Draft Motor Fault  
Rollout Switch Fault  
Internal Control Fault  
Software Lockout  
INDUCED-  
DRAFT  
BLOWER  
HOUSING  
MOTOR  
OFF  
1 Flash†  
MANIFOLD  
PRESSURE  
TAP  
GAS  
VALVE  
2 Flashes  
3 Flashes  
4 Flashes  
5 Flashes  
6 Flashes  
7 Flashes  
8 Flashes  
9 Flashes  
C06152  
Fig. 63 --- Burner Section Details  
LEGEND  
LED — Light-Emitting Diode  
*A 3-second pause exists between LED error code flashes. If more than  
one error code exists, all applicable codes will be displayed in numeri-  
cal sequence.  
†Indicates a code that is not an error. The unit will continue to operate  
when this code is displayed.  
IMPORTANT: Refer to Troubleshooting Tables for additional  
information.  
C06153  
Fig. 64 --- Burner Tray Details  
52  
LOW HEAT  
72,000 BTUH INPUT AND 60,000 BTUH INPUT  
MEDIUM AND HIGH HEAT  
115,000 BTUH INPUT,  
150,000 BTUH INPUT,  
90,000BTUH INPUT AND  
120,000 BTUH INPUT  
C06154  
Fig. 65 --- Spark Gap Adjustment  
Cleaning and Adjustment  
5. Reinstall burner rack as described above.  
1. Remove burner rack from unit as described above.  
2. Inspect burners and, if dirty, remove burners from rack.  
3. Using a soft brush, clean burners and cross-over port as  
required.  
Step 15 Replacement Parts  
A complete list of replacement parts may be obtained from any  
Bryant distributor upon request. Refer to Fig. 66 for a typical unit  
wiring schematic.  
4. Adjust spark gap. (See Fig. 65.)  
53  
NOTES:  
1. If any of the original wire furnished must be replaced, it must  
be replaced with type 90 C wire or its equivalent.  
2. Three phase motors are protected under primary single  
phasing conditions.  
3. Use copper conductors only.  
4. TRAN is wired for 230 v unit. If unit is to be run with 208 v  
power supply, disconnect BLK wire from 230 v tap (ORN)  
and connect to 208 v tap (RED). Insulate end of 230 v tap.  
LEGEND  
OFM  
OLR  
P
Outdoor (Condenser) Fan Motor  
Overload Relay  
C
Contactor, Compressor  
Capacitor  
CAP  
CLO  
COMP  
EQUIP  
FPT  
FU  
Splice  
Plug  
Compressor Lockout  
Compressor Motor  
Equipment  
PL  
Plug Assembly  
Splice (Marked)  
Factory Wiring  
QT  
RS  
SAT  
TRAN  
Quadruple Terminal  
Rollout Switch  
Freeze Up Protection Thermostat  
Fuse  
Supply Air Temperature Sensor  
Transformer  
GND  
HPS  
HS  
Ground  
Field Control Wiring  
High-Pressure Switch  
Hall-Effect Sensor  
Ignitor  
Field Splice  
Field Power Wiring  
I
Accessory or Optional Wiring  
To indicate common potential only;  
not to represent wiring.  
Marked Wire  
IDM  
IFC  
Induced-Draft Motor  
Indoor Fan Contactor  
Indoor Fan Motor  
Integrated Gas Unit Controller  
Low-Pressure Switch  
Limit Switch  
Terminal (Marked)  
Terminal (Unmarked)  
Terminal Block  
IFM  
IGC  
LPS  
LS  
MGV  
Main Gas Valve  
C06147  
Fig. 66 --- Typical Wiring Schematic and Component Arrangement (208/230--3--60 Shown)  
54  
DCV (Demand Controlled Ventilation) and Power Exhaust  
TROUBLESHOOTING  
Unit Troubleshooting  
Refer to Tables 39--43 for unit troubleshooting details.  
Economi$er IV Troubleshooting  
See Table 44 for EconoMi$er IV logic.  
A functional view of the EconoMi$er IV is shown in Fig. 60.  
Typical settings, sensor ranges, and jumper positions are also  
shown. An EconoMi$er IV simulator program is available from  
your Bryant distributor to help with EconoMi$er IV training and  
troubleshooting.  
To check DCV and Power Exhaust:  
1. Make sure EconoMi$er IV preparation procedure has been  
performed.  
2. Ensure terminals AQ and AQ1 are open. The LED for  
both DCV and Exhaust should be off. The actuator should  
be fully closed.  
3. Connect a 9-v battery to AQ (positive node) and AQ1  
(negative node). The LED for both DCV and Exhaust  
should turn on. The actuator should drive to between 90  
and 95% open.  
Economi$er IV Preparation  
4. Turn the Exhaust potentiometer CW until the Exhaust  
LED turns off. The LED should turn off when the  
potentiometer is approximately 90%. The actuator should  
remain in position.  
This procedure is used to prepare the EconoMi$er IV for  
troubleshooting. No troubleshooting or testing is done by  
performing the following procedure.  
5. Turn the DCV set point potentiometer CW until the DCV  
LED turns off. The DCV LED should turn off when the  
potentiometer is approximately 9v. The actuator should  
drive fully closed.  
6. Turn the DCV and Exhaust potentiometers CCW until the  
Exhaust LED turns on. The exhaust contacts will close 30  
to 120 seconds after the Exhaust LED turns on.  
NOTE: This procedure requires a 9-v battery, 1.2 kilo-ohm  
resistor, and a 5.6 kilo-ohm resistor which are not supplied with  
the EconoMi$er IV.  
IMPORTANT: Be sure to record the positions of all  
potentiometers before starting troubleshooting.  
1. Disconnect power at TR and TR1. All LEDs should be  
off. Exhaust fan contacts should be open.  
7. Return EconoMi$er IV settings and wiring to normal  
after completing troubleshooting.  
2. Disconnect device at P and P1.  
3. Jumper P to P1.  
DCV Minimum and Maximum Position  
4. Disconnect wires at T and T1. Place 5.6 kilo-ohm resistor  
across T and T1.  
To check the DCV minimum and maximum position:  
1. Make sure EconoMi$er IV preparation procedure has been  
performed.  
5. Jumper TR to 1.  
6. Jumper TR to N.  
2. Connect a 9-v battery to AQ (positive node) and AQ1  
(negative node). The DCV LED should turn on. The  
actuator should drive to between 90 and 95% open.  
3. Turn the DCV Maximum Position potentiometer to  
midpoint. The actuator should drive to between 20 and  
80% open.  
7. If connected, remove sensor from terminals S and +.  
O
Connect 1.2 kilo-ohm 4074EJM checkout resistor across  
terminals S and +.  
O
8. Put 620-ohm resistor across terminals S and +.  
R
9. Set minimum position, DCV set point, and exhaust  
potentiometers fully CCW (counterclockwise).  
4. Turn the DCV Maximum Position potentiometer to fully  
CCW. The actuator should drive fully closed.  
5. Turn the Minimum Position potentiometer to midpoint.  
The actuator should drive to between 20 and 80% open.  
6. Turn the Minimum Position Potentiometer fully CW. The  
actuator should drive fully open.  
10. Set DCV maximum position potentiometer fully CW  
(clockwise).  
11. Set enthalpy potentiometer to D.  
12. Apply power (24 vac) to terminals TR and TR1.  
Differential Enthalpy  
7. Remove the jumper from TR and N. The actuator should  
drive fully closed.  
To check differential enthalpy:  
1. Make sure EconoMi$er IV preparation procedure has been  
performed.  
2. Place 620-ohm resistor across S and +.  
8. Return EconoMi$er IV settings and wiring to normal  
after completing troubleshooting.  
O
Supply--Air Input  
3. Place 1.2 kilo-ohm resistor across S and +. The Free  
R
To check supply-air input:  
Cool LED should be lit.  
1. Make sure EconoMi$er IV preparation procedure has been  
performed.  
4. Remove 620-ohm resistor across S and +. The Free Cool  
O
LED should turn off.  
2. Set the Enthalpy potentiometer to A. The Free Cool LED  
turns on. The actuator should drive to between 20 and  
80% open.  
5. Return EconoMi$er IV settings and wiring to normal  
after completing troubleshooting.  
Single Enthalpy  
3. Remove the 5.6 kilo-ohm resistor and jumper T to T1. The  
actuator should drive fully open.  
4. Remove the jumper across T and T1. The actuator should  
drive fully closed.  
5. Return EconoMi$er IV settings and wiring to normal  
after completing troubleshooting.  
To check single enthalpy:  
1. Make sure EconoMi$er IV preparation procedure has been  
performed.  
2. Set the enthalpy potentiometer to A (fully CCW). The  
Free Cool LED should be lit.  
3. Set the enthalpy potentiometer to D (fully CW). The Free  
Cool LED should turn off.  
4. Return EconoMi$er IV settings and wiring to normal  
after completing troubleshooting.  
55  
Economi$er IV Troubleshooting Completion  
5. Remove 620-ohm resistor from terminals S and +.  
R
6. Remove 1.2 kilo-ohm checkout resistor from terminals S  
This procedure is used to return the EconoMi$er IV to operation.  
No troubleshooting or testing is done by performing the  
following procedure.  
O
and +. If used, reconnect sensor from terminals S and +.  
O
7. Remove jumper from TR to N.  
8. Remove jumper from TR to 1.  
1. Disconnect power at TR and TR1.  
2. Set enthalpy potentiometer to previous setting.  
3. Set DCV maximum position potentiometer to previous  
setting.  
9. Remove 5.6 kilo-ohm resistor from T and T1. Reconnect  
wires at T and T1.  
10. Remove jumper from P to P1. Reconnect device at P and  
P1.  
4. Set minimum position, DCV set point, and exhaust  
potentiometers to previous settings.  
11. Apply power (24 vac) to terminals TR and TR1.  
Table 39—LED Error Code Service Analysis  
SYMPTOM  
CAUSE  
REMEDY  
Hardware Failure.  
Loss of power to control module (IGC).  
Check 5 amp fuse on IGC, power to unit, 24-v circuit breaker, and  
transformer. Units without a 24-v circuit breaker have an internal  
overload in the 24-v transformer. If the overload trips, allow  
10 minutes for automatic reset.  
(LED OFF)  
Fan ON/OFF Delay Modified High limit switch opens during heat  
Ensure unit is fired on rate and temperature rise is correct.  
exchanger warm-up period before fan-on  
(LED/FLASH)  
delay expires.  
Limit switch opens within three minutes  
after blower-off delay timing in Heating  
mode.  
Ensure units’ external static pressure is within application guide-  
lines.  
Limit Switch Fault.  
(LED 2 Flashes)  
High temperature limit switch is open.  
Check the operation of the indoor (evaporator) fan motor.  
Ensure that the supply-air temperature rise is in accordance with  
the range on the unit nameplate.  
Flame Sense Fault.  
(LED 3 Flashes)  
The IGC sensed flame that should not be  
present.  
Reset unit. If problem persists, replace control board.  
4 Consecutive Limit  
Inadequate airflow to unit.  
Check operation of indoor (evaporator) fan motor and that supply-air  
temperature rise agrees with range on unit nameplate information.  
Switch Faults.  
(LED 4 Flashes)  
Ignition Lockout.  
Unit unsuccessfully attempted ignition for  
15 minutes.  
Check ignitor and flame sensor electrode spacing, gaps, etc.  
Ensure that flame sense and ignition wires are properly  
terminated. Verify that unit is obtaining proper amount of gas.  
(LED 5 Flashes)  
Induced-Draft Motor Fault. IGC does not sense that induced-draft  
Check for proper voltage. If motor is operating, check the  
speed sensor plug/IGC Terminal J2 connection. Proper  
connection: PIN 1— White, PIN 2 — Red, PIN 3 — Black.  
(LED 6 Flashes)  
motor is operating.  
Rollout Switch Fault.  
(LED 7 Flashes)  
Rollout switch has opened.  
Rollout switch will automatically reset, but IGC will continue to  
lock out unit. Check gas valve operation. Ensure that induced-  
draft blower wheel is properly secured to motor shaft.  
Reset unit at unit disconnect.  
Internal Control Fault.  
(LED 8 Flashes)  
Microprocessor has sensed an error in the  
software or hardware.  
If error code is not cleared by resetting unit power, replace the IGC.  
Temporary Software  
Electrical interference is impeding the IGC  
Reset 24-v to control board or turn thermostat off and then on. Fault  
will automatically reset itself in one hour.  
Lockout  
software.  
(LED 9 Flashes)  
IMPORTANT: Refer to heating troubleshooting for additional  
heating section troubleshooting information.  
!
CAUTION  
COMPONENT DAMAGE HAZARD  
Failure to follow this caution may result in component  
damage.  
If the IGC must be replaced, be sure to ground yourself to  
dissipate any electrical charge that may be present before  
handling new control board. The IGC is sensitive to static  
electricity and may be damaged if the necessary precautions  
are not taken.  
LEGEND  
IGC --- Integrated Gas Unit Controller  
LED --- L igh t --- E mittin g D iode  
56  
Table 40— Heating Service Analysis  
PROBLEM  
CAUSE  
Misaligned spark electrodes.  
No gas at main burners.  
REMEDY  
Burners Will Not  
Check flame ignition and sensor electrode positioning. Adjust as needed.  
Ignite.  
Check gas line for air purge as necessary. After purging gas line of air, allow gas  
to dissipate for at least 5 minutes before attempting to relight unit.  
Check gas valve.  
Water in gas line.  
No power to furnace.  
Drain water and install drip leg to trap water.  
Check power supply, fuses, wiring, and circuit breaker.  
No 24 v power supply to control circuit.  
Check transformer. Transformers with internal overcurrent protection require a  
cool-down period before resetting. Check 24-v circuit breaker; reset if neces-  
sary.  
Miswired or loose connections.  
Burned-out heat anticipator in thermostat.  
Broken thermostat wires.  
Dirty air filter.  
Check all wiring and wirenut connections.  
Replace thermostat.  
Run continuity check. Replace wires, if necessary.  
Clean or replace filter as necessary.  
Inadequate Heating.  
Gas input to unit too low.  
Check gas pressure at manifold. Clock gas meter for input. If too low, increase  
manifold pressure or replace with correct orifices.  
Unit undersized for application.  
Restricted airflow.  
Replace with proper unit or add additional unit.  
Clean filter, replace filter, or remove any restrictions.  
Blower speed too low.  
Use high speed tap, increase fan speed, or install optional blower, as suitable  
for individual units, Adjust pulley.  
Limit switch cycles main burners.  
Too much outdoor air.  
Check rotation of blower, thermostat heat anticipator settings, and temperature  
rise of unit. Adjust as needed.  
Adjust minimum position.  
Check economizer operation.  
Poor Flame  
Incomplete combustion (lack of  
combustion air) results in:  
Check all screws around flue outlets and burner compartment. Tighten as nec-  
Characteristics.  
essary.  
Aldehyde odors, CO (carbon monoxide),  
Cracked heat exchanger.  
sooting flame, or floating flame.  
Overfired unit — reduce input, change orifices, or adjust gas line or manifold  
pressure.  
Check vent for restriction. Clean as necessary.  
Check orifice to burner alignment.  
Burners Will Not  
Turn Off.  
Unit is locked into Heating mode for a  
one minute minimum.  
Wait until mandatory one-minute time period has elapsed or reset power to  
unit.  
Table 41—Perfect HumidityAdaptive Dehumidification System Subcooling Mode Service Analysis  
PROBLEM  
CAUSE  
REMEDY  
Subcooling Mode (Liquid Reheat)  
No power to control transformer from  
Check power source and evaporator-fan relay. Ensure all  
Will Not Energize.  
evaporator-fan motor.  
wire connections are tight.  
No power from control transformer to liquid line  
solenoid valve.  
1. Fuse open; check fuse. Ensure continuity of wiring.  
2. Low-pressure switch open. Cycle unit off and allow  
low-pressure switch to reset. Replace switch if it will  
not close.  
3. Transformer bad; check transformer.  
Liquid line solenoid valve will not operate.  
1. Solenoid coil defective; replace.  
2. Solenoid valve stuck open; replace.  
Liquid line solenoid valve will not open.  
Valve is stuck closed; replace valve.  
Low System Capacity.  
Low refrigerant charge or frosted evaporator coil.  
1. Check charge amount. Charge per Fig. 55---58.  
2. Evaporator coil frosted; check and replace low-pres-  
sure switch if necessary.  
Loss of Compressor Superheat  
Conditions with Subcooling/Reheat  
Dehumidification Coil Energized.  
Thermostatic expansion valve (TXV).  
1. Check TXV bulb mounting, and secure tightly to suc-  
tion line.  
2. Replace TXV if stuck open or closed.  
Table 42—Perfect HumidityAdaptive Dehumidification System Hot Gas Reheat Mode Service Analysis  
PROBLEM  
Reheat Mode Will Not Energize.  
CAUSE  
REMEDY  
No power to control transformer from  
Check power source and evaporator-fan relay. Ensure all  
evaporator-fan motor.  
wire connections are tight.  
No power from control transformer to hot gas  
line solenoid valve  
1. Fuse open; check fuse. Ensure continuity of wiring.  
2. Low-pressure switch open. Cycle unit off and allow  
low-pressure switch to reset. Replace switch if it will  
not close.  
3. Transformer bad; check transformer.  
Hot gas line solenoid valve will not operate.  
1. Solenoid coil defective; replace.  
2. Solenoid valve stuck closed; replace.  
Low refrigerant charge or frosted evaporator coil.  
1. Check charge amount. Charge per Fig. 55---58.  
2. Evaporator coil frosted; check and replace low-pres-  
sure switch if necessary.  
Loss of Compressor Superheat  
Conditions with Subcooling/Reheat  
Dehumidification Coil Energized.  
Thermostatic expansion valve (TXV).  
1. Check TXV bulb mounting, and secure tightly to suc-  
tion line.  
2. Replace TXV if stuck open or closed.  
Valve is stuck, replace valve.  
Valve is stuck; replace valve.  
Excessive Superheat.  
Liquid line solenoid valve will not operate.  
Hot gas line solenoid valve will not close.  
57  
Table 43—Cooling Service Analysis  
PROBLEM  
CAUSE  
REMEDY  
Call power company.  
Replace fuse or reset circuit breaker.  
Replace component.  
Power failure.  
Compressor and Condenser Fan  
Will Not Start.  
Fuse blown or circuit breaker tripped.  
Defective thermostat, contactor, transformer, or  
control relay.  
Insufficient line voltage.  
Incorrect or faulty wiring.  
Thermostat setting too high.  
Determine cause and correct.  
Check wiring diagram and rewire correctly.  
Lower thermostat setting below room tempera-  
ture.  
Faulty wiring or loose connections in compres-  
sor circuit.  
Check wiring and repair or replace.  
Determine cause. Replace compressor.  
Determine cause and replace.  
Compressor Will Not Start  
But Condenser Fan Runs.  
Compressor motor burned out, seized, or in-  
ternal overload open.  
Defective run/start capacitor, overload, start  
relay.  
One leg of 3-phase power dead.  
Replace fuse or reset circuit breaker. Determine  
cause.  
Refrigerant overcharge or undercharge.  
Recover refrigerant, evacuate system, and re-  
Compressor Cycles (Other Than  
Normally Satisfying Thermostat).  
charge to nameplate.  
Defective compressor.  
Insufficient line voltage.  
Blocked condenser.  
Replace and determine cause.  
Determine cause and correct.  
Determine cause and correct.  
Determine cause and replace.  
Defective run/start capacitor, overload, or start  
relay.  
Defective thermostat.  
Replace thermostat.  
Faulty condenser-fan motor or capacitor.  
Restriction in refrigerant system.  
Dirty air filter.  
Replace.  
Locate restriction and remove.  
Replace filter.  
Compressor Operates Continuously.  
Unit undersized for load.  
Thermostat set too low.  
Low refrigerant charge.  
Leaking valves in compressor.  
Air in system.  
Decrease load or increase unit size.  
Reset thermostat.  
Locate leak, repair, and recharge.  
Replace compressor.  
Recover refrigerant, evacuate system, and re-  
charge.  
Condenser coil dirty or restricted.  
Dirty air filter.  
Dirty condenser coil.  
Refrigerant overcharged.  
Air in system.  
Clean coil or remove restriction.  
Replace filter.  
Clean coil.  
Excessive Head Pressure.  
Recover excess refrigerant.  
Recover refrigerant, evacuate system, and re-  
charge.  
Condenser air restricted or air short-cycling.  
Low refrigerant charge.  
Compressor valves leaking.  
Restriction in liquid tube.  
High heat load.  
Compressor valves leaking.  
Refrigerant overcharged.  
Dirty air filter.  
Determine cause and correct.  
Check for leaks, repair, and recharge.  
Replace compressor.  
Remove restriction.  
Check for source and eliminate.  
Replace compressor.  
Recover excess refrigerant.  
Replace filter.  
Check for leaks, repair, and recharge.  
Remove source of restriction.  
Head Pressure Too Low.  
Excessive Suction Pressure.  
Suction Pressure Too Low.  
Low refrigerant charge.  
Metering device or low side restricted.  
Insufficient evaporator airflow.  
Increase air quantity. Check filter and replace if  
necessary.  
Temperature too low in conditioned area.  
Outdoor ambient below 25 F.  
Time off delay not finished.  
Reset thermostat.  
Install low-ambient kit.  
Wait for 30-second off delay.  
Evaporator Fan Will Not Shut Off.  
58  
Table 44—EconoMi$er IV Input/Output Logic  
INPUTS  
Outdoor  
OUTPUTS  
N Terminal†  
Occupied  
Enthalpy*  
Compressor  
Stage Stage  
Demand Control  
Ventilation (DCV)  
Unoccupied  
Y1 Y2  
Return  
Damper  
Closed  
1
2
On  
Off  
Off  
Off  
Off  
Off  
On  
Off  
Off  
Off  
Off  
Off  
On On  
On Off  
Off Off  
On On  
On Off  
Off Off  
On On  
On Off  
Off Off  
On On  
On Off  
Off Off  
On  
On  
Off  
On  
Off  
Off  
On  
On  
Off  
On  
Off  
Off  
Below set  
High  
Low  
Minimum position  
(DCV LED Off)  
(Free Cooling LED Off)  
Low  
High  
Low  
High  
Modulating** (between min. Modulating** (between  
(Free Cooling LED On)  
position and full-open)  
closed and full-open)  
Minimum position  
Closed  
Above set  
High  
Modulating†† (between min. Modulating†† (between  
position and DCV maximum) closed and DCV  
maximum)  
(DCV LED On)  
(Free Cooling LED Off)  
Low  
Modulating***  
Modulating†††  
(Free Cooling LED On)  
*For single enthalpy control, the module compares outdoor enthalpy to the ABCD set point.  
†Power at N terminal determines Occupied/Unoccupied setting: 24 vac (Occupied), no power (Unoccupied).  
**Modulation is based on the supply-air sensor signal.  
††Modulation is based on the DCV signal.  
***Modulation is based on the greater of DCV and supply-air sensor signals, between minimum position and either maximum position (DCV) or fully open (sup-  
ply-air signal).  
†††Modulation is based on the greater of DCV and supply-air sensor signals, between closed and either maximum position (DCV) or fully open (supply-air sig-  
nal).  
C06053  
Fig. 67 --- EconoMi$er IV Functional View  
59  
START-UP CHECKLIST  
(Remove and Store in Job File)  
I. PRELIMINARY INFORMATION  
MODEL NO.:  
DATE:  
SERIAL NO.:  
TECHNICIAN:  
II. PRE-START-UP (insert checkmark in box as each item is completed)  
j
j
j
j
j
j
j
j
j
VERIFY THAT JOBSITE VOLTAGE AGREES WITH VOLTAGE LISTED ON RATING PLATE  
VERIFY THAT ALL PACKAGING MATERIALS HAVE BEEN REMOVED FROM UNIT  
REMOVE ALL SHIPPING HOLDDOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS  
VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS  
CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS  
CHECK GAS PIPING FOR LEAKS  
CHECK THAT RETURN (INDOOR) AIR FILTERS ARE CLEAN AND IN PLACE  
VERIFY THAT UNIT INSTALLATION IS LEVEL  
CHECK FAN WHEELS AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW  
TIGHTNESS  
j
CHECK TO ENSURE THAT ELECTRICAL WIRING IS NOT IN CONTACT WITH REFRIGERANT LINES  
OR SHARP METAL EDGES  
j CHECK PULLEY ALIGNMENT AND BELT TENSION PER INSTALLATION INSTRUCTIONS  
III. START-UP  
ELECTRICAL  
SUPPLY VOLTAGE  
COMPRESSOR AMPS  
INDOOR-FAN AMPS  
L1-L2  
L1  
L1  
L2-L3  
L2  
L2  
L3-L1  
L3  
L3  
TEMPERATURES  
OUTDOOR-AIR TEMPERATURE  
RETURN-AIR TEMPERATURE  
COOLING SUPPLY AIR  
DB  
DB  
DB  
DB  
WB  
HEATING SUPPLY AIR  
PRESSURES (Cooling Mode)  
GAS INLET PRESSURE  
IN.WG  
IN.WG (HIGH FIRE)  
GAS MANIFOLD PRESSURE  
REFRIGERANT SUCTION  
REFRIGERANT DISCHARGE  
PSIG  
PSIG  
j
VERIFY THAT 3-PHASE FAN MOTOR AND BLOWER ARE ROTATING IN CORRECT DIRECTION. IF THEY  
ARE NOT ROTATING IN CORRECT DIRECTION, LOCKING COLLAR MUST BE RE-TIGHTENED AFTER  
CORRECTING DIRECTION OF ROTATION  
j
j
VERIFY THAT 3-PHASE SCROLL COMPRESSOR IS ROTATING IN THE CORRECT DIRECTION  
VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS  
E2007 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231  
Printed in U.S.A.  
Edition Date: 2/07  
Catalog No. II581B---C---36---1  
Replaces: II 581B---36---7  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
60  

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