Bryant DURAPAC PLUS 581B User Manual

installation, start-up and

service instructions

581B

DuraPac Plus Series

Sizes 036-072

3 to 6 Tons

SINGLE PACKAGE ROOFTOP

GAS HEATING/ELECTRIC COOLING UNITS

Cancels: II 581B-36-6

II 581B-36-7

10/1/05

WARNING: Before performing service or mainte-

nance operations on unit, turn off main power switch to

unit. Electrical shock could cause personal injury.

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1

INSTALLATION

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33

I. Step 1 — Provide Unit Support. . . . . . . . . . . . . . . . . 1

II. Step 2 — Field Fabricate Ductwork . . . . . . . . . . . . . 2

Unit is shipped in the vertical configuration. To convert to

horizontal application, remove side duct opening covers.

Using the same screws, install covers on vertical duct open-

ings with the insulation-side down. Seals around duct open-

ings must be tight. See Fig. 1.

III. Step 3 — Determine Location of Drain Line

and External Trap. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

IV. Step 4 — Rig and Place Unit. . . . . . . . . . . . . . . . . . . 4

V. Step 5 — Install Flue Hood . . . . . . . . . . . . . . . . . . . . 4

VI. Step 6 — Install Gas Piping . . . . . . . . . . . . . . . . . . . 4

VII. Step 7 — Make Electrical Connections . . . . . . . . . . 9

VIII. Step 8 — Adjust Factory-Installed Options. . . . . . 13

IX. Step 9 — Adjust Evaporator-Fan Speed . . . . . . . . 22

I. STEP 1 — PROVIDE UNIT SUPPORT

A. Roof Curb

Assemble and install accessory roof curb in accordance with

instructions shipped with curb. See Fig. 2. Install insulation,

cant strips, roofing felt, and counter flashing as shown. Duct-

work must be attached to curb. If gas is to be routed through

the curb, attach the accessory thru-the-curb service connec-

tion plate to the roof curb in accordance with the accessory

installation instructions. Connection plate must be installed

before unit is set in roof curb.

PRE-START-UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34-37

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38-44

TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . .45-49

INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1

IMPORTANT: The gasketing of the unit to the roof curb is crit-

ical for a watertight seal. Install gasket supplied with the roof

curb as shown in Fig. 2. Improperly applied gasket can also

result in air or water leaks and poor unit performance.

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can

be hazardous due to system pressure and electrical compo-

nents. Only trained and qualified service personnel should

install, repair, or service air-conditioning equipment.

Curb should be level. This is necessary for unit drain to func-

tion properly. Unit leveling tolerances are shown in Fig. 3.

Refer to Accessory Roof Curb Installation Instructions for

additional information as required.

Untrained personnel can perform basic maintenance func-

tions of cleaning coils and filters and replacing filters. All

other operations should be performed by trained service per-

sonnel. When working on air-conditioning equipment,

observe precautions in the literature, tags and labels

attached to the unit, and other safety precautions that may

apply.

B. Slab Mount (Horizontal Units Only)

Provide a level concrete slab that extends a minimum of 6 in.

beyond unit cabinet. Install a gravel apron in front of con-

denser coil air inlet to prevent grass and foliage from

obstructing airflow.

NOTE: Horizontal units may be installed on a roof curb if

required.

Follow all safety codes. Wear safety glasses and work gloves.

Use quenching cloth for unbrazing operations. Have fire

extinguishers available for all brazing operations.

C. Alternate Unit Support

A non-combustible sleeper rail can be used in the unit curb

support area. If sleeper rails cannot be used, support the long

sides of the unit with a minimum of 3 equally spaced 4-in. x

4-in. pads on each side.

CAUTION: Ensure voltage listed on unit data plate

agrees with electrical supply provided for the unit.

WARNING: Disconnect gas piping from unit when

leak testing at pressure greater than ¹/₂psig. Pressures

greater than /₂psig will cause gas valve damage result-

ing in hazardous condition. If gas valve is subjected to

pressure greater than /₂psig, it must be replaced before

use. When pressure testing field-supplied gas piping at

pressures of /₂psig or less, a unit connected to such

piping must be isolated by manually closing the gas

valve(s).

ROOF CURB

ACCESSORY

D ALT

DRAIN

HOLE

UNIT SIZE

CONNECTOR

PKG. ACCY.

ACCESSORY

PWR

GAS

POWER

CONTROL

1′-2″

CRRFCURB001A01

CRRFCURB002A01

CRBTMPWR001A01

CRBTMPWR002A01

³/₄″ [19] NPT

1¹/₄″ [31.7]

³/₄″ [19] NPT

³/₄″

¹/₂″

[356]

581B036-072

[19] NPT

[12.7]

2′-0″

1′-9¹¹

″

1′-4″

1³/₄″

¹/₂″

[610]

¹/₂″

[551¹]⁶[406]

[44.5]

[12.7]

CRBTMPWR003A01

CRBTMPWR004A01

¹/₂″

[12.7] NPT

³/₄″

[12.7]

NOTES:

1¹/₄″ [31.7]

1. Roof curb accessory is shipped disassembled.

2. Insulated panels.

[19] NPT

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.

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.

Fig. 2 — Roof Curb Details

—3—

A. Positioning

Maintain clearance around and above unit to provide mini-

mum distance from combustible materials, proper airflow,

and service access. See Fig. 7.

Do not install unit in an indoor location. Do not locate unit

air inlets near exhaust vents or other sources of contami-

nated air.

Be sure that unit is installed so that snow will not block the

combustion intake or flue outlet.

MAXIMUM ALLOWABLE

DIFFERENCE (in.)

Unit may be installed directly on wood flooring or on Class

A, B, or C roof-covering material when roof curb is used.

A-B

0.5

B-C

1.0

A-C

1.0

Although unit is weatherproof, guard against water from

higher level runoff and overhangs.

Fig. 3 — Unit Leveling Tolerances

Position unit on roof curb so that the following clearances are

maintained: /₄in. clearance between the roof curb and the

base rail inside the front and rear, 0.0 in. clearance between

the roof curb and the base rail inside on the duct end of the

unit. This will result in the distance between the roof curb

and the base rail inside on the condenser end of the unit

being approximately equal to Fig. 2, section C-C.

Locate mechanical draft system flue assembly at least 48 in.

from an adjacent building or combustible material. Units

having accessory flue discharge deflector require only 18 in.

clearance. When unit is located adjacent to public walkways,

flue assembly must be at least 7 ft above grade.

Flue gas can deteriorate building materials. Orient unit so

that flue gas will not affect building materials.

HORIZONTAL

DRAIN PLUG

Adequate combustion and ventilation air space must be pro-

vided for proper operation of this equipment. Be sure that

installation complies with all local codes and Section 5.3, Air

for Combustion and Ventilation per NFGC (National Fuel Gas

Code), ANSI (American National Standards Institute) Z223.1-

latest year and addendum Z223.1A-latest year. In Canada,

installation must be in accordance with the CAN1.B149.1 and

CAN1.B149.2 installation codes for gas burning appliances.

NOTE: Drain plug is shown in factory-installed position.

Fig. 4 — Condensate Drain Pan

Flue vent discharge must have a minimum horizontal clear-

ance of 4 ft from electric and gas meters, gas regulators, and

gas relief equipment.

After unit is in position, remove shipping materials and rig-

ging skids.

V. 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. 7

and 8.

For units being installed in California Air Quality Manage-

ment Districts which require NOx emissions of 40 nanograms/

joule or less, a low NOx unit must be installed.

NOTE: Trap should be deep enough to offset maximum unit static dif-

ference. A 4-in. trap is recommended.

NOTE: Low NOx units are available for 3 to 5 ton units.

Fig. 5 — Condensate Drain Piping Details

VI. STEP 6 — INSTALL GAS PIPING

Unit is equipped for use with type of gas shown on name-

plate. Refer to local building codes, or in the absence of local

codes, to ANSI Z223.1-latest year and addendum Z223.1A-

latest year entitled NFGC. In Canada, installation must be

in accordance with the CAN1.B149.1 and CAN1.B149.2

installation codes for gas burning appliances.

IV. STEP 4 — RIG AND PLACE UNIT

Inspect unit for transportation damage. File any claim with

transportation agency. Keep unit upright and do not drop.

Spreader bars are not required if top crating is left on unit.

Rollers may be used to move unit across a roof. Level by

using unit frame as a reference. See Table 1 and Fig. 6

for additional information. Operating weight is shown in

Table 1 and Fig. 6.

For natural gas applications, gas pressure at unit gas con-

nection must not be less than 4.0 in. wg or greater than

13.0 in. wg while unit is operating. For liquid propane and

high heat applications, the gas pressure must not be less

than 5.0 in. wg or greater than 13.0 in. wg at the unit

connection.

Lifting holes are provided in base rails as shown in Fig. 6

and 7. Refer to rigging instructions on unit.

—4—

NOTES:

OPERATING

WEIGHT

1. Place unit on curb as close as possible to the duct end.

2. Dimension in ( ) is in millimeters.

“A”

“B”

“C”

UNIT

581B

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 grav-

ity. 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 and economizer weights.

5. Weights include base unit without the Perfect Humidity™ dehumid-

ification system. See Table 1 for additional unit operating weights

with the Perfect Humidity system.

in.

036

048

060

072

530

540

560

635

240

245

254

288

73.69 1872 35.50 902 33.31 847

CAUTION: All panels must be in place when rigging.

Fig. 6 — Rigging Details

Size gas supply piping for 0.5-in. wg maximum pressure

drop. Do not use supply pipe smaller than unit gas

connection.

Installation Instructions for information on power wiring

and gas connection piping. Power wiring, control wiring and

gas connection piping can be routed through field-drilled

holes in the basepan, which is specifically designed and dim-

pled for drilling the accessory connection holes.

Support gas piping as shown in the table in Fig. 9. For exam-

ple, a ³/₄-in. gas pipe must have one field-fabricated support

beam every 8 ft. Therefore, an 18-ft long gas pipe would have

a minimum of 3 support beams. See Fig. 9 for typical pipe

guide and locations of external manual gas shutoff valve.

CAUTION: When connecting the gas line to the

unit gas valve, the installer MUST use a backup

wrench to prevent damage to the valve.

NOTE: If accessory thru-the-bottom connections and roof

curb are used, refer to the Thru-the-Bottom Accessory

—5—

Table 1 — Physical Data — 581B036-072

UNIT SIZE 581B

036

048

060

072

NOMINAL CAPACITY

OPERATING WEIGHT (lb)

Unit

EconoMi$er IV

Perfect Humidity™ Dehumidification System

Roof Curb

530

540

560

635

115

COMPRESSOR

Quantity

Oil (oz)

Scroll

R-22

REFRIGERANT TYPE

Operating Charge (lb-oz)

Standard Unit

5-8

9-0

10-2

15-8

10-0

17-0

12-8

21-0

Unit With Perfect Humidity Dehumidification System

CONDENSER FAN

Propeller

Quantity...Diameter (in.)

1...22

3500

1...22

3500

1...22

4100

1...22

4100

Nominal Cfm

Motor Hp...Rpm

¹/₄...825

180

¹/₄...825

180

¹/₄...1100

320

¹/₄...1100

320

Watts Input (Total)

CONDENSER COIL

Rows...Fins/in.

Total Face Area (sq ft)

Enhanced Copper Tubes, Aluminum Lanced Fins

1...17

14.6

2...17

16.5

2...17

16.5

2...17

16.5

EVAPORATOR COIL

Standard Unit

Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol™ Metering Device

Rows...Fins/in.

Total Face Area (sq ft)

2...15

5.5

2...15

5.5

4...15

5.5

4...15

5.5

Unit with Perfect Humidity Dehumidification System

Rows...Fins/in.

1...17

3.9

2...17

3.9

2...17

3.9

2...17

5.2

Total Face Area (sq ft)

EVAPORATOR FAN

Centrifugal Type, Belt Drive

1...10 x 10

Quantity...Size (in.)

1...10 x 10

1200

1...10 x 10

2400

Nominal Cfm

1600

1.20

2000

1.30/2.40*

2.90

48/56*

Maximum Continuous Bhp

Std

Hi-Static

Std

1.20

2.40

2.90

Motor Frame Size

Fan Rpm Range

Hi-Static

Std

680-1044

1075-1455

Ball

770-1185

1075-1455

Ball

1035-1460

1300-1685

Ball

1119-1585

1300-1685

Ball

Hi-Static

Motor Bearing Type

Maximum Fan Rpm

2100

Motor Pulley Pitch Diameter A/B (in.)

Std

Hi-Static

Std

1.9/2.9

1.9/2.0

2.4/3.4

2.8/3.8

3.4/4.4

3.4/3.4

Nominal Motor Shaft Diameter (in.)

Fan Pulley Pitch Diameter (in.)

Belt — Type...Length (in.)

Hi-Static

Std

4.⁸5

4.⁸0

4.0

Hi-Static

Std

4.5

1...A...36

1....4...40

1...A...38

Hi-Static

1...A...39

1...A...40

Pulley Center Line Distance (in.)

Speed Change per Full Turn of

Movable Pulley Flange (rpm)

Movable Pulley Maximum Full

Turns from Closed Position

10.0-12.4

14.7-15.5

Std

Hi-Static

Std

Hi-Static

Std

Factory Setting — Full Turns Open

Hi-Static

Std

3¹/₂

826

3¹/₂

936

3¹/₂

1248

3¹/₂

1305

Factory Speed Setting (rpm)

Hi-Static

1233

1396

Fan Shaft Diameter at Pulley (in.)

LEGEND

Bhp — Brake Horsepower

††An LP kit is available as an accessory. If an LP kit is used with low NO_xunits,

one low NO_xbaffle must be removed and the units will no longer be classified

as low NO_xunits.

||California compliant three-phase models.

*Single phase/three phase.

†Indicates automatic reset.

**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_xmodels have combustion products that

are controlled to 40 nanograms per joule or less.

—6—

Table 1 — Physical Data — 581B036-072 (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

071/072

114/115

149/150

.113...33

—

.113...33

.129...30

.113...33

.129...30

.113...33

.129...30

060N

090N

120N

.102...38

—

.102...38

.116...32

.102...38

.116...32

—

Liquid Propane — Alt††

071/072

114/115

149/150

.089...43

—

.089...43

.102...38

.089...43

.102...38

.089...43

.102...38

060N

090N

120N

.082...45

—

.082...45

.094...42

.082...45

.094...42

—

Thermostat Heat Anticipator Setting (amps)

208/230/460 v

First Stage

.14

Second Stage

Gas Input (Btuh)

First Stage/Second Stage (3-phase units)

072

115

150

50,000/ 72,000

82,000/115,000

—

50,000/ 72,000

82,000/115,000

120,000/150,000

50,000/ 72,000

82,000/115,000

120,000/150,000

50,000/ 72,000

82,000/115,000

120,000/150,000

071II

114II

149II

—/ 72,000

—/115,000

—

—/ 72,000

—/115,000

—/150,000

—/ 72,000

—/115,000

—/150,000

—

060N***

090N***

120N***

—/ 60,000

—/ 90,000

—

—/ 60,000

—/ 90,000

—/120,000

—/ 60,000

—/ 90,000

—/120,000

—

Efficiency (Steady State) (%)

072

115

150

82.8

—

82.8

80.4

82.8

80.4

071

114

149

—

060N

090N

120N

80.2

—

80.2

80.7

80.2

80.7

—

Temperature Rise Range

072

115

150

25-55

55-85

—

25-55

35-65

50-80

25-55

35-65

50-80

25-55

35-65

50-80

071

114

149

25-55

55-85

—

25-55

35-65

50-80

25-55

35-65

50-80

—

060N

090N

120N

20-50

30-60

—

20-50

30-60

40-70

20-50

30-60

40-70

—

Manifold Pressure (in. wg)

Natural Gas — Std

3.5

Liquid Propane — Alt††

Maximum Static Pressure (in. wg)

Field Gas Connection Size (in.)

1.0

HIGH-PRESSURE SWITCH (psig)

450 50

428

320

Standard Compressor Internal Relief

Cutout

Reset (Auto.)

LOSS-OF-CHARGE SWITCH/LOW-PRESSURE

SWITCH (Liquid LIne) (psig)

Cutout

Reset (Auto.)

FREEZE PROTECTION THERMOSTAT

Opens (F)

Closes (F)

OUTDOOR-AIR INLET SCREENS

Quantity...Size (in.)

Cleanable

1...20 x 24 x 1

RETURN-AIR FILTERS

Quantity...Size (in.)

Throwaway

2...16 x 25 x 2

4...16 x 16 x 2

LEGEND

††An LP kit is available as an accessory. If an LP kit is used with low NO_xunits,

one low NO_xbaffle must be removed and the units will no longer be classified

as low NO_xunits.

Bhp— Brake Horsepower

||California compliant three-phase models.

*Single phase/three phase.

†Indicates automatic reset.

**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_xmodels have combustion products that

are controlled to 40 nanograms per joule or less.

—7—

—8—

Refer to unit label diagram for additional information. Pig-

tails 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 require-

ments. In Canada, electrical connections must be in accor-

dance with CSA (Canadian Standards Association) C22.1

Canadian Electrical Code Part One.

Install conduit through side panel openings indicated in

Fig. 7. Route power lines through connector to terminal

connections as shown in Fig. 10.

On 3-phase units, voltages between phases must be balanced

within 2% and the current within 10%. Use the formula

shown in Note 3 under Tables 2A-2D to determine the per-

centage of 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.

Fig. 8 — Flue Hood Details

NOTE: If thru-the-bottom accessory connections are used,

refer to the thru-the-bottom accessory installation instruc-

tions for power wiring. Refer to Fig. 7 for location to drill

holes in basepan.

B. Field Control Wiring

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 accor-

dance with thermostat installation instructions.

LEGEND

NFGC — National Fuel Gas Code

*Field supplied.

Route thermostat cable or equivalent single leads of colored

wire from thermostat subbase terminals to low-voltage con-

nections on unit (shown in Fig. 11) as described in Steps 1-4

below.

NOTE: Follow all local codes.

1. If mounted on a roof curb and electrical power is to be

run through the basepan, an accessory thru-the-bot-

tom connection kit is required. This is available

through the local Bryant distributor. This kit is

required to ensure a reliable water-tight connection.

STEEL PIPE

SPACING OF SUPPORTS

NOMINAL DIAMETER

X DIMENSION

(ft)

(in.)

³/₄or 1

1¹/₄or larger

2. If unit is mounted on roof curb and accessory thru-

the-bottom connections are used, route wire through

connection plate.

Fig. 9 — Gas Piping Guide (With Accessory

Thru-the-Curb Service Connections)

3. Pass control wires through the hole provided on unit

(see connection D, Connection Sizes table, Fig. 7).

VII. STEP 7 — MAKE ELECTRICAL CONNECTIONS

4. 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. 12. The raceway provides the

UL-required clearance between high- and low-voltage

wiring.

WARNING: Unit cabinet must have an uninter-

rupted, 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 Associa-

tion), latest edition, and local electrical codes. Do not

use gas piping as an electrical ground. Failure to follow

this warning could result in the installer being liable

for personal injury of others.

5. Connect thermostat wires to screw terminals of low-

voltage connection board (see Fig. 11).

NOTE: For wire runs up to 50 ft, use no. 18 AWG (American

Wire Gage) insulated wire (35 C minimum). For 51 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).

NOTE: 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.

A. 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

on the transformer.

C. Heat Anticipator Settings

Set heat anticipator settings at 0.14 amp for first stage and

0.14 amp for second-stage heating, when available.

—9—

LEGEND

—

Contactor

—

Contactor

COMP

—

Compressors

S — Compre sors

EQUIP — Equipment

GND

IFC

—

Equipment

—

Ground

—

Ground

—

Indoor (Evaporator)

—

Ind or (Evaporator)

Fan Contactor

NEC

—

National Electrical Code

—

Terminal Block

—

Fig. 10 — Power Wiring Connections

BRYANT ELECTRONIC THERMOSTAT

COOL STAGE 1

FAN

Y1/W2

RACEWAY

LOW VOLTAGE

CONNECTIONS

INTEGRATED GAS UNIT

CONTROLLER (IGC)

HEAT STAGE 1

COOL STAGE 2

HEAT STAGE 2

24 VAC HOT

W/W1

Y/Y2

O/W2

WIRE

CONNECTIONS

LOW-VOLTAGE

SECTION

24 VAC COM

N/A

IPD/X

OUTDOOR AIR

SENSOR

THERMOSTAT DIPSWITCH SETTINGS

OFF

LEGEND

Field Wiring

HOLE IN END PANEL (HIDDEN)

NOTE: Underlined letter indicates active thermostat output when con-

figured for A/C operation.

Fig. 12 — Field Control Wiring Raceway

Fig. 11 — Low-Voltage Connections With or

Without Economizer

—10—

Table 2A — Electrical Data — Standard Motor Units Without Electrical Convenience Outlet

VOLTAGE

RANGE

Min Max Qty

COMPRESSOR

(each)

OFM

COMBUSTION

FAN MOTOR

POWER

MINIMUM UNIT

IFM

UNIT

581B

NOMINAL VOLTAGE

(V-Ph-Hz)

(each)

SUPPLY*

DISCONNECT SIZE†

RLA

16.0

10.3

5.1

LRA

FLA

0.7

0.4

0.7

0.4

1.5

0.8

1.4

0.6

FLA

4.9

2.2

4.9

2.2

8.8

5.8

2.6

5.8

2.6

FLA

.60

.30

.60

.30

.60

.30

.60

.30

MCA

MOCP**

30/30

25/25

FLA

25/25

18/18

LRA

101/101

90/90

208/230-1-60

208/230-3-60

460-3-60

187

414

518

187

414

518

187

414

518

187

414

518

254

508

632

254

508

632

254

508

632

254

508

632

88.0

77.0

39.0

31.0

126.0

93.0

46.5

40.0

169.0

123.0

62.0

50.0

156.0

75.0

56.0

25.6/25.6

18.5/18.5

9.0

036

(3 Tons)

575-3-60

4.2

7.3

208/230-1-60

208/230-3-60

460-3-60

23.7

13.5

6.4

35.2/35.2

22.5/22.5

10.6

45/45

30/30

34/34

22/22

139/139

106/106

048

(4 Tons)

575-3-60

6.4

10.1

208/230-1-60

208/230-3-60

460-3-60

575-3-60

208/230-3-60

460-3-60

28.8

17.3

9.0

46.3/46.3

28.9/28.9

14.7

60/60

35/35

45/45

28/28

216/216

168/168

060

(5 Tons)

7.1

11.6

20.5

9.6

32.8/32.8

15.2

40/40

32/32

200/200

072

(6 Tons)

575-3-60

7.7

12.2

Table 2B — Electrical Data — Standard Motor Units With Electrical Convenience Outlet

POWER

VOLTAGE

RANGE

COMPRESSOR

(each)

OFM

(each)

COMBUSTION

FAN MOTOR

MINIMUM UNIT

DISCONNECT SIZE†

IFM

SUPPLY

UNIT

581B

NOMINAL VOLTAGE

(V-Ph-Hz)

WITH OUTLET*

Min Max Qty

RLA

16.0

10.3

5.1

LRA

FLA

0.7

0.4

0.7

0.4

1.5

0.8

1.4

0.6

FLA

4.9

2.2

4.9

2.2

8.8

5.8

2.6

5.8

2.6

FLA

.60

.30

.60

.30

.60

.30

.60

.30

MCA

31.6/31.6

24.5/24.5

11.7

MOCP**

FLA

30/30

24/24

LRA

106/106

95/95

208/230-1-60

208/230-3-60

460-3-60

187

414

518

187

414

518

187

414

518

187

414

518

254

508

632

254

508

632

254

508

632

254

508

632

88.0

77.0

39.0

31.0

126.0

93.0

46.5

40.0

169.0

123.0

62.0

50.0

156.0

75.0

56.0

35/35

30/30

036

(3 Tons)

575-3-60

4.2

9.5

208/230-1-60

208/230-3-60

460-3-60

23.7

13.5

6.4

41.2/41.2

28.5/28.5

13.3

50/50

35/35

39/39

27/27

144/144

111/111

048

(4 Tons)

575-3-60

6.4

12.2

208/230-1-60

208/230-3-60

460-3-60

28.8

17.3

9.0

7.1

20.5

9.6

52.3/52.3

34.9/34.9

17.4

13.8

38.8/38.8

17.9

60/60

40/40

45/45

50/50

34/34

37/37

221/221

173/173

205/205

060

(5 Tons)

575-3-60

208/230-3-60

460-3-60

575-3-60

072

(6 Tons)

7.7

14.3

LEGEND

(AB) 457 – 452 = 5 v

(BC) 464 – 457 = 7 v

(AC) 457 – 455 = 2 v

FLA

— Full Load Amps

HACR — Heating, Air Conditioning and

Refrigeration

Maximum deviation is 7 v.

IFM

LRA

— Indoor (Evaporator) Fan Motor

— Locked Rotor Amps

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

457

MCA — Minimum Circuit Amps

MOCP — Maximum Overcurrent Protection

NEC — National Electrical Code

= 1.53%

OFM — Outdoor (Condenser) Fan Motor

This amount of phase imbalance is satisfactory as it is below the maximum

allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%,

contact your local electric utility company immediately.

RLA

— Rated Load Amps

— Underwriters’ Laboratories

*The values listed in this table do not include power exhaust. See table at right for

power exhaust requirements.

†Used to determine minimum disconnect per NEC.

**Fuse or HACR circuit breaker.

POWER EXHAUST ELECTRICAL DATA

MOCP

POWER EXHAUST

PART NO.

MCA

NOTES:

(for separate

(230 v)

(460 v)

(575 v)

1. In compliance with NEC requirements for multimotor and combination load

equipment (refer to NEC Articles 430 and 440), the overcurrent protective

device for the unit shall be fuse or HACR breaker. The UL, Canada units

may be fuse or circuit breaker.

power source)

CRPWREXH021A01

CRPWREXH022A01

CRPWREXH023A01

CRPWREXH028A01

CRPWREXH029A01

CRPWREXH030A01

N/A

3.3

N/A

1.7

N/A

1.6

0.9

N/A

1.8

N/A

1.0

N/A

1.32

N/A

0.68

N/A

2. Electrical data based on 95 F ambient outdoor-air temperature 10% voltage.

3. Unbalanced 3-Phase Supply Voltage

Never operate a motor where phase imbalance in supply voltage is greater

than 2%. Use the following formula to determine the percent voltage

imbalance.

N/A

0.64

% Voltage Imbalance

N/A — Not available

max voltage deviation from average voltage

= 100 x

NOTE: If a single power source is to be used, size wire to include power exhaust

MCA and MOCP.

average voltage

Example: Supply voltage is 460-3-60.

Check MCA and MOCP when power exhaust is powered through the unit. Deter-

mine the new MCA including the power exhaust using the following formula:

MCA New = MCA unit only + MCA of Power Exhaust

For example, using a 581B072 unit with MCA = 32.8 and MOCP = 40, with

CRPWREXH030A01 power exhaust.

MCA New = 32.8 amps + 1.6 amps = 34.4 amps

If the new MCA does not exceed the published MOCP, then MOCP would not

change. The MOCP in this example is 40 amps and the MCA New is below 40;

therefore the MOCP is acceptable. If “MCA New” is larger than the published

MOCP, raise the MOCP to the next larger size. For separate power, the MOCP for

the power exhaust will be 15 amps per NEC.

AB = 452 v

BC = 464 v

AC = 455 v

452 + 464 + 455

Average Voltage =

1371

= 457

Determine maximum deviation from average voltage.

—11—

Table 2C — Electrical Data — High-Static Motor Units Without Electrical Convenience Outlet

MINIMUM UNIT

DISCONNECT

SIZE†

VOLTAGE

RANGE

COMPRESSOR

(each)

OFM

COMBUSTION

FAN MOTOR

POWER

NOMINAL

VOLTAGE

(V-Ph-Hz)

IFM

UNIT

581B

(each)

SUPPLY*

Min

Max

Qty

RLA

10.3

5.1

LRA

FLA

0.7

0.4

0.7

0.4

1.5

0.8

1.4

0.6

FLA

5.8

RLA

0.6

0.3

0.6

0.3

0.6

0.3

0.6

0.3

MCA

MOCP**

FLA

LRA

120

208/230-3-60

460-3-60

575-3-60

208/230-3-60

460-3-60

575-3-60

208/230-3-60

460-3-60

575-3-60

208/230-3-60

460-3-60

575-3-60

187

414

518

187

414

518

187

414

518

187

414

518

254

508

632

254

508

632

254

508

632

254

508

632

77.0

39.0

31.0

93.0

46.5

40.0

123.0

62.0

50.0

156.0

75.0

56.0

19.4

9.4

7.7

036

048

060

072

2.6

5.8

2.6

7.5

3.4

7.5

3.4

4.2

13.5

6.4

23.4

11.0

10.4

30.6

15.5

12.2

34.5

136

187

219

107

6.4

17.3

9.0

7.1

20.5

9.6

7.7

12.8

Table 2D — Electrical Data — High-Static Motor Units With Electrical Convenience Outlet

MINIMUM UNIT

DISCONNECT

SIZE†

VOLTAGE

RANGE

COMPRESSOR

(each)

OFM

COMBUSTION

FAN MOTOR

POWER

NOMINAL

VOLTAGE

(V-Ph-Hz)

IFM

UNIT

581B

(each)

SUPPLY*

Min

Max

254

508

632

254

508

632

254

508

632

254

508

632

Qty

RLA

10.3

5.1

LRA

FLA

0.7

0.4

0.7

0.4

1.5

0.8

1.4

0.6

FLA

5.8

RLA

0.6

0.3

0.6

0.3

0.6

0.3

0.6

0.3

MCA

MOCP**

FLA

LRA

124

140

192

208/230-3-60

460-3-60

575-3-60

208/230-3-60

460-3-60

575-3-60

208/230-3-60

460-3-60

575-3-60

208/230-3-60

460-3-60

575-3-60

187

414

518

187

414

518

187

414

518

187

414

518

77.0

39.0

31.0

93.0

46.5

40.0

123.0

62.0

50.0

156.0

75.0

56.0

25.4

12.1

9.8

036

048

060

072

2.6

5.8

2.6

7.5

3.4

7.5

3.4

4.2

13.5

6.4

29.4

13.7

12.6

36.6

18.2

14.4

40.5

18.7

15.0

6.4

17.3

9.0

7.1

20.5

9.6

224

109

7.7

LEGEND

(AB) 457 – 452 = 5 v

(BC) 464 – 457 = 7 v

(AC) 457 – 455 = 2 v

FLA

— Full Load Amps

HACR — Heating, Air Conditioning and

Refrigeration

Maximum deviation is 7 v.

IFM

LRA

— Indoor (Evaporator) Fan Motor

— Locked Rotor Amps

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

457

MCA — Minimum Circuit Amps

MOCP — Maximum Overcurrent Protection

NEC

— National Electrical Code

= 1.53%

OFM — Outdoor (Condenser) Fan Motor

This amount of phase imbalance is satisfactory as it is below the maximum

allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%,

contact your local electric utility company immediately.

RLA

— Rated Load Amps

— Underwriters’ Laboratories

*The values listed in this table do not include power exhaust. See table at right for

power exhaust requirements.

†Used to determine minimum disconnect per NEC.

**Fuse or HACR circuit breaker.

POWER EXHAUST ELECTRICAL DATA

MOCP

POWER EXHAUST

PART NO.

MCA

NOTES:

(for separate

(230 v)

(460 v)

(575 v)

1. In compliance with NEC requirements for multimotor and combination load

equipment (refer to NEC Articles 430 and 440), the overcurrent protective

device for the unit shall be fuse or HACR breaker. The UL, Canada units

may be fuse or circuit breaker.

power source)

CRPWREXH021A01

CRPWREXH022A01

CRPWREXH023A01

CRPWREXH028A01

CRPWREXH029A01

CRPWREXH030A01

N/A

3.3

N/A

1.7

N/A

1.6

0.9

N/A

1.8

N/A

1.0

N/A

1.32

N/A

0.68

N/A

2. Electrical data based on 95 F ambient outdoor-air temperature 10% voltage.

3. Unbalanced 3-Phase Supply Voltage

Never operate a motor where phase imbalance in supply voltage is greater

than 2%. Use the following formula to determine the percent voltage

imbalance.

N/A

0.64

% Voltage Imbalance

N/A — Not available

max voltage deviation from average voltage

= 100 x

NOTE: If a single power source is to be used, size wire to include power exhaust

MCA and MOCP.

average voltage

Example: Supply voltage is 460-3-60.

Check MCA and MOCP when power exhaust is powered through the unit. Deter-

mine the new MCA including the power exhaust using the following formula:

MCA New = MCA unit only + MCA of Power Exhaust

For example, using a 581B072 unit with MCA = 32.8 and MOCP = 40, with

CRPWREXH030A01 power exhaust.

MCA New = 32.8 amps + 1.6 amps = 34.4 amps

If the new MCA does not exceed the published MOCP, then MOCP would not

change. The MOCP in this example is 40 amps and the MCA New is below 40;

therefore the MOCP is acceptable. If “MCA New” is larger than the published

MOCP, raise the MOCP to the next larger size. For separate power, the MOCP for

the power exhaust will be 15 amps per NEC.

AB = 452 v

BC = 464 v

AC = 455 v

452 + 464 + 455

Average Voltage =

1371

= 457

Determine maximum deviation from average voltage.

—12—

VIII. STEP 8 — ADJUST FACTORY-INSTALLED OPTIONS

A. Disconnect Switch

The optional disconnect switch is non-fused. The switch has

the capability of being locked in place for safety purposes.

B. Perfect Humidity™ Dehumidification System

Perfect Humidity system operation can be controlled by field

installation of a Bryant-approved humidistat device (Fig. 13),

or light commercial Thermidistat™ device (Fig. 14). To install

the humidistat device:

% RELATIVE HUMIDITY

1. Route humidistat cable through hole provided in unit

corner post.

2. 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. 12. The raceway provides the

UL-required clearance between high-voltage and low-

voltage wiring.

Fig. 13 — Accessory Field-Installed Humidistat Device

3. Use a wire nut to connect humidistat cable into low-

voltage wiring as shown in Fig. 15.

To install Thermidistat device:

1. Route Thermidistat cable through hole provided in

unit corner post.

2. Feed the wires through the raceway built into the cor-

ner post to the 24-v barrier located on the left side of

the control box. See Fig. 12. The raceway provides the

UL-required clearance between high and low voltage

wiring.

3. A field-supplied relay must be installed between the

Thermidistat device and the Perfect Humidity circuit

(recommended relay: HN612KK324). See Fig. 16. The

relay coil is connected between the DEHUM output

and C (common) of the unit. The relay controls the

Perfect Humidity solenoid valve and must be wired

between the Perfect Humidity fuse and the low-pres-

sure switch. Refer to the installation instructions

included with the Bryant Light Commercial Thermi-

distat device for more information.

Fig. 14 — Light Commercial Thermidistat Device

LEGEND

— Contactor (Compressor)

— Circuit Breaker

Low Temperature Lockout

LTLO

—

TRAN — Transformer

— Cooling Relay

Terminal (Unmarked)

DHR — Dehumidify Relay

DSV — Discharge Solenoid Valve

Splice

LPS

— Humidistat

Factory Wiring

Low Pressure Switch

—

LSV — Liquid Line Solenoid Valve

Accessory or Optional Wiring

Fig. 15 — Typical Perfect Humidity Dehumidification System

Humidistat Wiring (208/230-v Unit Shown)

—13—

LCT

ROOF TOP UNIT

DEHUM

3.2 AMPS

PINK

RED

24V

T STAT WIRES

LTLO

PINK

FROM

PERFECT HUMIDITY

SYSTEM LLSV

LEGEND

— Circuit Breaker

LCT — Light Commercial Thermidistat™ Device

LLSV — Liquid Line Solenoid Valve

LTLO — Low Temperature Lockout

PERFECT HUMIDITY SYSTEM

Fig. 16 — Typical Rooftop Unit with Perfect Humidity™ Dehumidification System with Thermidistat Device

C. Convenience Outlet

An optional convenience outlet provides power for rooftop

use. For maintenance personnel safety, the convenience out-

let power is off when the unit disconnect is off. Adjacent unit

outlets may be used for service tools. An optional “Hot Out-

let” is available from the factory as a special order item.

OUTDOOR

AIR OPENING

PANEL

3 SCREWS

(SIDE)

D. Manual Outdoor-Air Damper

The outdoor-air hood and screen are attached to the basepan

at the bottom of the unit for shipping.

Assembly:

1. Determine quantity of ventilation required for build-

ing. Record amount for use in Step 8.

2. Remove outdoor-air opening panel. Save panels and

screws. See Fig. 17.

3. Remove evaporator coil access panel. Separate hood

and screen from basepan by removing the 4 screws

securing them. Save all screws.

Fig. 17 — Damper Panel with Manual

Outdoor-Air Damper Installed

4. Replace evaporator coil access panel.

5. Place hood on front of outdoor-air opening panel. See

Fig. 18 for hood details. Secure top of hood with the 4

screws removed in Step 3. See Fig. 19.

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. 18 and 19.

Secure hood with 6 screws from Step 6.

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. 17.

Slide blade vertically until it is in the appropriate

position determined by Fig. 20. Tighten screws.

9. Remove and save screws currently on sides of hood.

Insert screens. Secure screens to hood using the

screws. See Fig. 19.

Fig. 18 — Outdoor-Air Hood Details

—14—

ECONOMI$ER IV

CONTROLLER

OUTSIDE AIR

TEMPERATURE SENSOR

WIRING

HARNESS

LOW AMBIENT

SENSOR

ACTUATOR

Fig. 19 — Optional Manual Outdoor-Air Damper

with Hood Attached

Fig. 21 — EconoMi$er IV Component Locations

FILTER ACCESS PANEL

COMPRESSOR

ACCESS PANEL

OUTDOOR-AIR OPENING AND

INDOOR COIL ACCESS PANEL

Fig. 22 — Typical Access Panel Locations

Fig. 20 — Outdoor-Air Damper Position Setting

E. Optional EconoMi$er IV

HOOD BOX

BRACKET

See Fig. 21 for EconoMi$er IV component locations.

NOTE: These instructions are for installing the optional

EconoMi$er IV only. Refer to the accessory EconoMi$er IV

installation instructions 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. 22.

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 in the position shown in Fig. 21.

To remove the component box from its shipping posi-

tion, remove the screw holding the hood box bracket

to the top of the economizer. Slide the hood box out of

the unit. See Fig. 23.

Fig. 23 — Hood Box Removal

—15—

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. Sa ve th e a lu m in u m filter

for u se in th e p ow er exh a u st h ood a ssem b ly.

17 1/4”

3. The indoor coil access panel will be used as the top of

the hood. Remove the screws along the sides and bot-

tom of the indoor coil access panel. See Fig. 24.

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. 25.

DIVIDER

OUTSIDE

AIR

5. Remove the shipping tape holding the economizer

barometric relief damper in place.

HOOD

CLEANABLE

ALUMINUM

FILTER

6. Insert the hood divider between the hood sides. See

Fig. 25 and 26. 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.

FILTER

BAROMETRIC

RELIEF

FILTER

CLIP

Fig. 26 — Filter Installation

SIDE

PANEL

7. Open the filter clips which are located underneath

the hood top. Insert the aluminum filter into the bot-

tom 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. 26.

8. Caulk the ends of the joint between the unit top panel

and the hood top. See Fig. 24.

9. Replace the filter access panel.

TOP

10. Install all EconoMi$er IV accessories. EconoMi$er IV

wiring is shown in Fig. 27.

SIDE

PANEL

CAULK

HERE

Barometric flow capacity is shown in Fig. 28. Outdoor air

leakage is shown in Fig. 29. Return air pressure drop is

shown in Fig. 30.

INDOOR

COIL

ACCESS

PANEL

INDOOR

COIL

ACCESS

PANEL

F. EconoMi$er IV Standard Sensors

Outdoor Air Temperature (OAT) Sensor

Fig. 24 — Indoor Coil Access Panel Relocation

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. 21. The operating range of temperature

measurement is 40 to 100 F.

TOP

PANEL

INDOOR COIL

ACCESS PANEL

Supply Air Temperature (SAT) Sensor

The supply air temperature sensor is a 3 K thermistor

located at the inlet of the indoor fan. See Fig. 31. This sensor

is factory installed. The operating range of temperature

measurement is 0° to 158 F. See Table 3 for sensor tempera-

ture/resistance values.

LEFT

HOOD

SIDE

SCREW

19 1/16”

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.

33 3/8”

Outdoor Air Lockout Sensor

The EconoMi$er IV is equipped with an ambient tempera-

ture lockout switch located in the outdoor airstream which is

used to lockout the compressors below a 42 F ambient tem-

perature. See Fig. 21.

HOOD DIVIDER

Fig. 25 — Outdoor-Air Hood Construction

—16—

FOR OCCUPANCY CONTROL

REPLACE JUMPER WITH

FIELD-SUPPLIED TIME CLOCK

Potentiometer Defaults Settings:

Power Exhaust Middle

LEGEND

NOTES:

1. 620 ohm, 1 watt 5% resistor should be removed only when using differential

enthalpy or dry bulb.

DCV— Demand Controlled Ventilation

IAQ — Indoor Air Quality

Minimum Pos.

DCV Max.

DCV Set

Fully Closed

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

POT— Potentiometer

Middle

Enthalpy

C Setting

RAT — Return-Air Temperature

Fig. 27 — EconoMi$er IV Wiring

6000

5000

4000

3000

2000

1000

2500

2000

1500

1000

500

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.15

STATIC PRESSURE (in. wg)

0.05

0.25

STATIC PRESSURE (in. wg)

Fig. 30 — Return-Air Pressure Drop

Fig. 28 — Barometric Flow Capacity

SUPPLY AIR

TEMPERATURE

SENSOR

MOUNTING

LOCATION

SUPPLY AIR

TEMPERATURE

SENSOR

0.13 0.20 0.22 0.25 0.30 0.35 0.40 0.45 0.50

STATIC PRESSURE (in. wg)

Fig. 31 — Supply Air Sensor Location

Fig. 29 — Outdoor-Air Damper Leakage

—17—

Table 3 — Supply Air Sensor

Table 4 — EconoMi$er IV Sensor Usage

Temperature/Resistance Values

ECONOMI$ER IV WITH OUTDOOR AIR

DRY BULB SENSOR

Accessories Required

APPLICATION

TEMPERATURE (F)

RESISTANCE (ohms)

–58

–40

–22

–4

104

122

140

158

176

185

194

212

230

248

257

266

284

302

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

Outdoor Air

Dry Bulb

None. The outdoor air dry bulb sensor

is factory installed.

Differential

Dry Bulb

Single Enthalpy

CRTEMPSN002A00*

HH57AC078

and

CRENTDIF004A00*

Differential

Enthalpy

CO₂for DCV

Control using a

Wall-Mounted

CO₂Sensor

33ZCSENCO2

CO₂for DCV

Control using a

Duct-Mounted

CO₂Sensor

33ZCSENCO2†

and

CRCBDIOX005A00††

33ZCASPCO2**

525

376

321

274

203

153

116

102

*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 CO₂sensor.

**33ZCASPCO2 is an accessory aspirator box required for duct-mounted appli-

cations.

††CRCBDIOX005A00 is an accessory that contains both 33ZCSENCO2 and

33ZCASPCO2 accessories.

G. EconoMi$er IV Control Modes

Determine the EconoMi$er IV control mode before set up of the

control. Some modes of operation may require different sensors.

Refer to Table 4. The EconoMi$er IV is supplied from the fac-

tory 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.

Outdoor Dry Bulb Changeover

The standard controller is shipped from the factory config-

ured for outdoor dry bulb changeover control. The outdoor

air and supply air temperature sensors are included as stan-

dard. For this control mode, the outdoor temperature is com-

pared 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 outside air dampers to mini-

mum position. If the outdoor-air temperature is below the set

point, the position of the outdoor-air dampers will be con-

trolled to provide free cooling using outdoor air. When in this

mode, the LED next to the free cooling set point potentiome-

ter will be on. The changeover temperature set point is con-

trolled by the free cooling set point potentiometer located on

the control. See Fig. 32. The scale on the potentiometer is A,

B, C, and D. See Fig. 33 for the corresponding temperature

changeover values.

Fig. 32 — EconoMi$er IV Controller Potentiometer

and LED Locations

LED ON

LED OFF

LED ON

LED OFF

Differential Dry Bulb Control

LED ON

For differential dry bulb control the standard outdoor dry

bulb sensor is used in conjunction with an additional acces-

sory dry bulb sensor (part number CRTEMPSN002A00). The

accessory sensor must be mounted in the return airstream.

See Fig. 34. Wiring is provided in the EconoMi$er IV wiring

harness. See Fig. 27.

LED OFF

85 90

100

55 60

40 45

65 70 75 80

DEGREES FAHRENHEIT

Fig. 33 — Outdoor Air Temperature

Changeover Set Points

In this mode of operation, the outdoor-air temperature is

compared to the return-air temperature and the lower tem-

perature airstream is used for cooling. When using this mode

of changeover control, turn the enthalpy set point potentiom-

eter fully clockwise to the D setting. See Fig. 32.

—18—

Exhaust Set Point Adjustment

ECONOMI$ER IV

CONTROLLER

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. 32. 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.

ECONOMI$ER IV

GROMMET

Minimum Position Control

There is a minimum damper position potentiometer on the

EconoMi$er IV controller. See Fig. 32. The minimum damper

position maintains the minimum airflow into the building

during the occupied period.

RETURN AIR

SENSOR

RETURN DUCT

(FIELD-PROVIDED)

When using demand ventilation, the minimum damper posi-

tion represents the minimum ventilation position for VOC

(volatile organic compound) ventilation requirements. The

maximum demand ventilation position is used for fully occu-

pied ventilation.

Fig. 34 — Return Air Temperature or Enthalpy

Sensor Mounting Location

Outdoor Enthalpy Changeover

For enthalpy control, accessory enthalpy sensor (part num-

ber HH57AC078) is required. Replace the standard outdoor

dry bulb temperature sensor with the accessory enthalpy

sensor in the same mounting location. See Fig. 21. 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 potentiome-

ter on the EconoMi$er IV controller. The set points are A, B,

C, and D. See Fig. 35. The factory-installed 620-ohm jumper

must be in place across terminals SR and SR+ on the

EconoMi$er IV controller. See Fig. 21 and 36.

When demand ventilation control is not being used, the min-

imum position potentiometer should be used to set the occu-

pied ventilation position. The maximum demand ventilation

position should be turned fully clockwise.

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 out-

door and return-air temperatures.

To determine the minimum position setting, perform the fol-

lowing procedure:

1. Calculate the appropriate mixed air temperature

using the following formula:

Differential Enthalpy Control

For differential enthalpy control, the EconoMi$er IV control-

ler uses two enthalpy sensors (HH57AC078 and

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.

100

(T_O

) + (T_R

) = T_M

T_O= Outdoor-Air Temperature

OA = Percent of Outdoor Air

T_R= Return-Air Temperature

RA = Percent of Return Air

T_M= Mixed-Air Temperature

Replace the standard outside air dry bulb temperature sen-

sor with the accessory enthalpy sensor in the same mounting

location. See Fig. 21. Mount the return air enthalpy sensor

in the return air duct. See Fig. 34. Wiring is provided in the

EconoMi$er IV wiring harness. See Fig. 27. The outdoor

enthalpy changeover set point is set with the outdoor

enthalpy set point potentiometer on the EconoMi$er IV con-

troller. When using this mode of changeover control, turn the

enthalpy set point potentiometer fully clockwise to the D

setting.

As an example, if local codes require 10% outdoor air dur-

ing occupied conditions, outdoor-air temperature is 60 F,

and return-air temperature is 75 F.

(60 x .10) + (75 x .90) = 73.5 F

2. Disconnect the supply air sensor from terminals T

and T1.

3. Ensure that the factory-installed jumper is in place

across terminals P and P1. If remote damper posi-

tioning is being used, make sure that the terminals

are wired according to Fig. 27 and that the minimum

position potentiometer is turned fully clockwise.

Indoor Air Quality (IAQ) Sensor Input

The IAQ input can be used for demand control ventilation

control based on the level of CO₂measured in the space or

return air duct.

4. Connect 24 vac across terminals TR and TR1.

5. Carefully adjust the minimum position potentiometer

until the measured mixed air temperature matches

the calculated value.

Mount the accessory IAQ sensor according to manufacturer

specifications. The IAQ sensor should be wired to the AQ and

AQ1 terminals of the controller. Adjust the DCV potentiome-

ters to correspond to the DCV voltage output of the indoor air

quality sensor at the user-determined set point. See Fig. 37.

6. Reconnect the supply air sensor to terminals T and T1.

Remote control of the EconoMi$er IV damper is desirable when

requiring additional temporary ventilation. If a 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.

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.

—19—

95 100 105 110

(29) (32) (35) (38) (41) (43)

CONTROL CONTROL POINT

CURVE

APPROX. °F (°C)

AT 50% RH

(27)

73 (23)

70 (21)

67 (19)

63 (17)

(24)

(21)

(18)

(16)

(13)

(10)

(7)

(4)

(2)

HIGH LIMIT

CURVE

95 100 105 110

(2)

(4) (7) (10) (13) (16) (18) (21) (24) (27) (29) (32) (35) (38) (41) (43)

APPROXIMATE DRY BULB TEMPERATURE— °F (°C)

Fig. 35 — Enthalpy Changeover Set Points

CO SENSOR MAX RANGE SETTING

TR1

6000

5000

4000

3000

2000

1000

EXH

Set

10V

EXH

Vac

HOT

24 Vac

COM

Min

Pos

800 ppm

900 ppm

1000 ppm

1100 ppm

Open

DCV

Max

10V

AQ1

SO+

SR+

DCV

Set

10V

Free

Cool

DAMPER VOLTAGE FOR MAX VENTILATION RATE

EF1

Fig. 37 — CO₂Sensor Maximum Range Setting

Fig. 36 — EconoMi$er IV Control

—20—

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 poten-

tiometer to the P and P1 terminals on the EconoMi$er IV

controller. See Fig. 36.

Once base ventilation has been determined, set the mini-

mum damper position potentiometer to the correct position.

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 determine the maximum setting of the CO₂sensor.

For example, a 1100 ppm set point relates to a 15 cfm per

person design. Use the 1100 ppm curve on Fig. 37 to find the

point when the CO₂sensor output will be 6.7 volts. Line up

the point on the graph with the left side of the chart to deter-

mine that the range configuration for the CO₂sensor should

be 1800 ppm. The EconoMi$er IV controller will output the

6.7 volts from the CO₂sensor to the actuator when the CO₂

concentration in the space is at 1100 ppm. The DCV set point

may be left at 2 volts since the CO₂sensor voltage will be

ignored by the EconoMi$er IV controller until it rises above

the 3.6 volt setting of the minimum position potentiometer.

Damper Movement

Damper movement from full open to full closed (or vice

versa) takes 2¹/₂minutes.

Thermostats

The EconoMi$er IV control works with conventional thermo-

stats that have a Y1 (cool stage 1), Y2 (cool stage 2), W1

(heat stage 1), W2 (heat stage 2), and

(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.

Occupancy Control

The factory default configuration for the EconoMi$er IV con-

trol is occupied mode. Occupied status is provided by the

black jumper from terminal TR to terminal N. When unoccu-

pied mode is desired, install a field-supplied timeclock func-

tion in place of the jumper between TR and N. See Fig. 27.

When the timeclock contacts are closed, the EconoMi$er IV

control will be in occupied mode. When the timeclock con-

tacts are open (removing the 24-v signal from terminal N),

the EconoMi$er IV will be in unoccupied mode.

Once the fully occupied damper position has been deter-

mined, 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.

CO₂Sensor Configuration

The CO₂sensor has preset standard voltage settings that

can be selected anytime after the sensor is powered up. See

Table 5.

Demand Controlled Ventilation (DCV)

When using the EconoMi$er IV for demand controlled venti-

lation, 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.

Use setting 1 or 2 for Bryant equipment. See Table 5.

1. Press Clear and Mode buttons. Hold at least 5 sec-

onds until the sensor enters the Edit mode.

2. Press Mode twice. The STDSET Menu will appear.

3. Use the Up/Down button to select the preset number.

See Table 5.

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.

4. Press Enter to lock in the selection.

5. Press Mode to exit and resume normal operation.

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 fresh air supplied to

increase as the room CO₂level increases even though the

CO₂set point has not been reached. By the time the CO₂

level reaches the set point, the damper will be at maximum

ventilation and should maintain the set point.

The custom settings of the CO₂sensor can be changed any-

time after the sensor is energized. Follow the steps below to

change the non-standard settings:

1. Press Clear and Mode buttons. Hold at least 5 sec-

onds until the sensor enters the Edit mode.

2. Press Mode twice. The STDSET Menu will appear.

3. Use the Up/Down button to toggle to the NONSTD

menu and press Enter.

4. Use the Up/Down button to toggle through each of

the nine variables, starting with Altitude, until the

desired setting is reached.

In order to have the CO₂sensor control the economizer

damper in 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 tem-

peratures.

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 humid-

ity load on any zone is the fresh air introduced. For some

applications, a device such as an energy recovery unit is

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 com-

mercial applications.

100

(T_O

) + (T_R

) = T_M

T_O= Outdoor-Air Temperature

OA = Percent of Outdoor Air

T_R= Return-Air Temperature

RA = Percent of Return Air

T_M= Mixed-Air Temperature

If normal rooftop heating and cooling operation is not ade-

quate for the outdoor humidity level, an energy recovery unit

and/or a dehumidification option should be considered.

—21—

Table 5 — CO₂Sensor Standard Settings

VENTILATION

RATE

(cfm/Person)

CO₂

CONTROL RANGE

(ppm)

OPTIONAL

RELAY SETPOINT

(ppm)

RELAY

HYSTERESIS

(ppm)

ANALOG

OUTPUT

SETTING

EQUIPMENT

OUTPUT

0-10V

Proportional

Exponential

Proportional

Exponential

Proportional

Any

0-2000

0-1100

0- 900

0-1100

0- 900

0-9999

0-2000

1000

1100

900

4-20 mA

Interface w/Standard

2-10V

7-20 mA

0-10V

4-20 mA

0-10V

4-20 mA

0-10V

4-20 mA

0-10V

4-20 mA

0-10V

4-20 mA

0-10V

4-20 mA

0-10V

4-20 mA

Building Control System

Economizer

1100

900

Health & Safety

—

5000

700

500

Parking/Air Intakes/

Loading Docks

—

LEGEND

ppm — Parts Per Million

IX. STEP 9 — ADJUST EVAPORATOR-FAN SPEED

speed. Increasing fan speed increases load on motor.

Do not exceed maximum speed specified in Table 1.

Adjust evaporator-fan speed to meet jobsite conditions.

Tables 6A and 6B show fan rpm at motor pulley settings for

standard and alternate motors. Tables 7 and 8 show evapora-

tor fan motor data. Table 9 shows EconoMi$er IV pressure

drop. Table 10 shows sound data. Refer to Tables 11-28 for

fan performance data. See Fig. 38 for Perfect Humidity™ sys-

tem static pressure drop.

5. Set movable flange at nearest keyway of pulley hub

and tighten setscrew. (See Table 1 for speed change

for each full turn of pulley flange.)

To align fan and motor pulleys:

1. Loosen fan pulley setscrews.

2. Slide fan pulley along fan shaft.

NOTE: Before adjusting fan speed, make sure the new fan

speed will provide an acceptable air temperature rise range

on heating as shown in Table 1.

3. Make angular alignment by loosening motor from

mounting plate.

To adjust belt tension:

To change fan speed:

1. Loosen fan motor mounting nuts.

1. Shut off unit power supply.

2. Slide motor mounting plate away from fan scroll for

proper belt tension (¹/₂-in. deflection with 8 to 10 lb of

force) and tighten mounting nuts (see Fig. 39).

2. Loosen belt by loosening fan motor mounting nuts.

See Fig. 39.

3. Loosen movable pulley flange setscrew (see Fig. 40).

3. Adjust bolt and nut on mounting plate to secure

motor in fixed position.

4. Screw movable flange toward fixed flange to increase

fan speed and away from fixed flange to decrease fan

Table 6A — 581B Fan Rpm at Motor Pulley Setting With Standard Motor*

MOTOR PULLEY TURNS OPEN

UNIT

581B

971

1102

1389

1492

1¹/₂

935

1061

1354

1445

898

1019

1318

1399

2¹/₂

862

3¹/₂

789

4¹/₂

716

812

1141

1166

5¹/₂

—

1070

—

1035

—

036

1044

1185

1460

1585

1008

1144

1425

1538

826

936

1248

1305

753

853

1177

1212

680

770

1106

1119

048

060 (single and 3-phase)

072

978

895

1283

1352

1212

1259

*Approximate fan rpm shown (standard motor/drive).

Table 6B — 581B Fan Rpm at Motor Pulley Setting With High-Static Motor*

MOTOR PULLEY TURNS OPEN

UNIT

581B

1¹/₂

2¹/₂

3¹/₂

4¹/₂

5¹/₂

036

048

060

072

1455

1685

1423

1589

1392

1557

1360

1525

1328

1493

1297

1460

1265

1428

1233

1396

1202

1364

1170

1332

1138

1300

1107

—

1075

—

*Approximate fan rpm shown (high-static motor/drive).

—22—

0.35

0.3

0.25

0.2

0.15

0.1

4 & 5 ton

6 ton

0.05

3 ton

4000

1000

3000

2000

5000

6000

Fig. 38 — Humidi-MiZer™ Adaptive Dehumidification System Static Pressure Drop (in. wg)

MOTOR MOUNTING

PLATE NUTS

Fig. 39 — Belt-Drive Motor Mounting

Fig. 40 — Evaporator-Fan Pulley Adjustment

Table 7 — Evaporator-Fan Motor Data — Standard Motor

UNIT

581B

UNIT

PHASE

MAXIMUM

CONTINUOUS BHP*

MAXIMUM

OPERATING WATTS*

MAXIMUM

AMP DRAW

UNIT VOLTAGE

Single

Three

Single

Three

Single

Three

1.20

1.30

2.40

1000

1650

2120

208/230

460

4.9

2.2

4.9

2.2

10.1

6.7

3.0

6.7

3.0

036

048

575

208/230

460

575

208/230

460

575

208/230

460

060

072

Three

2.40

2120

575

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 con-

fidence. 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.

—23—

Table 8 — 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

6.7

3.0

8.6

3.9

8.6

3.9

036

046

060

072

Three

2.40

2.90

2120

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 con-

fidence. 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 9 — Accessory/FIOP EconoMi$er IV Static Pressure* (in. wg)

CFM

COMPONENT

1250

0.045

—

1500

0.065

—

1750

0.08

0.1

2000

0.12

0.125

2250

0.145

0.15

2500

0.175

0.18

2750

0.22

0.225

3000

0.255

0.275

Vertical EconoMi$er IV

Horizontal EconoMi$er IV

LEGEND

FIOP — Factory-Installed Option

*The static pressure must be added to external static pressure. The

sum and the evaporator entering-air cfm should be used in conjunction

with the Fan Performance tables to determine indoor blower rpm and

watts.

Table 10 — Outdoor Sound Power (Total Unit)

OCTAVE BANDS

ARI RATING

UNIT

581B

(decibels)

55.9

59.1

125

66.0

68.9

250

64.0

68.7

500

66.2

71.9

1000

68.4

74.0

2000

64.5

68.9

4000

61.7

65.7

8000

57.3

59.0

036-048

060-072

LEGEND

Air Conditioning and Refrigeration Institute

ARI

—

Table 11 — Fan Performance 581B036 — Vertical Discharge Units; Standard Motor (Belt Drive)*

EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW

CFM

0.2

0.4

0.6

0.8

1.0

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

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

0.37

0.43

0.50

0.57

0.65

0.74

0.84

368

430

498

572

651

738

831

947

972

0.44

0.51

0.59

0.67

0.76

0.86

0.96

437

509

587

670

760

856

960

925

999

952

981

1010

1040

1025

1053

1081

1110

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

—

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 1.20.

Bhp

3. See page 33 for general fan performance notes.

*Motor drive range: 680 to 1044 rpm. All other rpms require field-

supplied drive.

—24—

Table 12 — Fan Performance 581B036 — Vertical Discharge Units; High-Static Motor (Belt Drive)*

EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW

CFM

0.2

0.4

0.6

0.8

1.0

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

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

0.37

0.43

0.50

0.57

0.65

0.74

0.84

368

430

498

572

651

738

831

947

972

0.44

0.51

0.59

0.67

0.76

0.86

0.96

437

509

587

670

760

856

960

925

999

952

1025

1053

1081

1110

981

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

1139

1163

1188

1213

1239

1265

1292

0.64

0.74

0.85

0.96

1.08

1.21

1.34

637

737

1195

1219

1243

1268

1294

1320

1346

0.71

0.81

0.93

1.05

1.18

1.32

1.46

702

811

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

759

843

925

861

970

1086

1209

955

1047

1175

1310

1452

1073

1199

1332

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 2.40.

Bhp

3. See page 33 for general fan performance notes.

*Motor drive range: 1075 to 1455 rpm. All other rpms require field-

supplied drive.

Table 13 — Fan Performance 581B048 — Vertical Discharge Units; Standard Motor (Belt Drive)*

EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW

CFM

0.2

0.4

0.6

0.8

1.0

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

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

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

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

—

842

931

1010

1040

1070

1101

1133

—

875

963

994

1027

1060

1093

—

909

943

978

1014

1049

—

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

—

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 1.20.

Bhp

3. See page 33 for general fan performance notes.

*Motor drive range: 770 to 1185 rpm. All other rpms require field-

supplied drive.

—25—

Table 14 — Fan Performance 581B048 — Vertical Discharge Units; High-Static Motor (Belt Drive)*

EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW

CFM

0.2

0.4

0.6

0.8

1.0

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

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

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

0.47

0.54

0.62

0.70

0.79

0.89

1.00

1.11

1.24

471

540

952

981

0.57

0.65

0.74

0.84

0.94

1.05

1.16

1.29

1.42

572

651

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

670

760

842

931

616

1010

1040

1070

1101

1133

1165

1198

738

856

875

963

994

1027

1060

1093

1127

699

831

932

1040

1157

1283

1417

960

909

790

1070

1189

1316

1453

1598

943

888

978

994

1014

1049

1109

1233

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

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

—

972

1086

1209

1340

1480

1627

1784

1950

1086

1207

1336

1473

1620

1776

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 2.40.

Bhp

3. See page 33 for general fan performance notes.

*Motor drive range: 1075 to 1455 rpm. All other rpms require field-

supplied drive.

Table 15 — Fan Performance 581B060, 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

1.0

Rpm

Watts

Rpm

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

1500

1600

1700

1800

1900

2000

2100

2200

2300

2400

2500

848

887

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

—

927

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

—

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 1.30.

Bhp

3. See page 33 for general fan performance notes.

*Motor drive range: 1035 to 1460 rpm. All other rpms require field-

supplied drive.

—26—

Table 16 — Fan Performance 581B060, 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

1.0

Rpm

Watts

Rpm

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

1500

1600

1700

1800

1900

2000

2100

2200

2300

2400

2500

848

887

0.42

0.49

0.57

0.65

0.75

0.85

0.97

1.09

1.23

1.38

1.54

371

433

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

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

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

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

—

831

922

927

502

633

763

892

1022

1130

1246

1371

1505

1649

1803

1967

—

967

579

718

856

957

993

1007

1048

1090

1131

1173

1215

1258

663

811

1101

1219

1345

1481

1627

1784

1951

757

913

1066

1185

1313

1451

1600

1759

859

1023

1143

1273

1413

1564

970

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

—

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 2.40.

Bhp

3. See page 33 for general fan performance notes.

*Motor drive range: 1035 to 1460 rpm. All other rpms require field-

supplied drive.

Table 17 — Fan Performance 581B060 — Vertical Discharge Units; High-Static Motor (Belt Drive)*

EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW

CFM

0.2

0.4

0.6

0.8

1.0

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

1500

1600

1700

1800

1900

2000

2100

2200

2300

2400

2500

848

887

0.42

0.49

0.57

0.65

0.75

0.85

0.97

1.09

1.23

1.38

1.54

371

433

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

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

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

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

831

922

927

502

633

763

892

1022

1130

1246

1371

1505

1649

1803

1967

2142

967

579

718

856

957

993

1007

1048

1090

1131

1173

1215

1258

663

811

1101

1219

1345

1481

1627

1784

1951

757

913

1066

1185

1313

1451

1600

1759

859

1023

1143

1273

1413

1564

970

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

—

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 2.90.

Bhp

3. See page 33 for general fan performance notes.

*Motor drive range: 1300 to 1685 rpm. All other rpms require field-

supplied drive.

—27—

Table 18 — Fan Performance 581B072 — Vertical Discharge Units; Standard Motor (Belt Drive)*

EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW

CFM

0.2

0.4

0.6

0.8

1.0

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

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

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

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

—

731

903

1068

1183

1308

1441

1584

1736

1900

2073

—

827

933

1008

1123

1247

1380

1523

1677

1841

2016

—

1047

1170

1304

1448

1602

1768

1945

2135

—

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

—

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 2.40.

Bhp

3. See page 33 for general fan performance notes.

*Motor drive range: 1119 to 1585 rpm. All other rpms require field-

supplied drive.

Table 19 — Fan Performance 581B072 — 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

1.0

Rpm

Watts

Rpm

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

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

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

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

—

731

903

1068

1183

1308

1441

1584

1736

1900

2073

2258

2455

—

827

933

1008

1123

1247

1380

1523

1677

1841

2016

2203

2402

1047

1170

1304

1448

1602

1768

1945

2135

—

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

—

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 2.90.

Bhp

3. See page 33 for general fan performance notes.

*Motor drive range: 1300 to 1685 rpm. All other rpms require field-

supplied drive.

—28—

Table 20 — Fan Performance 581B036 — Horizontal Discharge Units; Standard Motor (Belt Drive)*

EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW

CFM

0.2

0.4

0.6

0.8

1.0

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

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

0.53

0.58

0.64

0.71

0.78

0.86

0.95

526

580

639

705

777

855

941

995

1020

1044

1070

1096

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

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

—

765

—

837

—

915

—

1000

1092

—

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 1.20.

Bhp

3. See page 33 for general fan performance notes.

*Motor drive range: 680 to 1044 rpm. All other rpms require field-

supplied drive.

Table 21 — Fan Performance 581B036 — Horizontal Discharge Units; High-Static Motor (Belt Drive)*

EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW

CFM

0.2

0.4

0.6

0.8

1.0

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

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

0.53

0.58

0.64

0.71

0.78

0.86

0.95

526

580

639

705

777

855

941

995

1020

1044

1070

1096

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

1084

1107

1130

1153

1177

1201

1226

0.76

0.83

0.90

0.98

1.06

1.15

1.25

760

825

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

765

896

837

915

1000

1092

974

1058

1149

1247

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 2.40.

Bhp

3. See page 33 for general fan performance notes.

*Motor drive range: 1075 to 1455 rpm. All other rpms require field-

supplied drive.

—29—

Table 22 — Fan Performance 581B048 — Horizontal Discharge Units; Standard Motor (Belt Drive)*

EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW

CFM

0.2

0.4

0.6

0.8

1.0

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

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

0.46

0.52

0.58

0.66

0.73

0.82

0.91

1.02

1.13

458

517

944

969

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

—

913

581

996

941

653

1023

1050

1078

1106

1135

—

970

731

999

817

1029

1059

1090

910

1012

1122

—

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

—

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 1.20.

Bhp

3. See page 33 for general fan performance notes.

*Motor drive range: 770 to 1185 rpm. All other rpms require field-

supplied drive.

Table 23 — Fan Performance 581B048 — Horizontal Discharge Units; High-Static Motor (Belt Drive)*

EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW

CFM

0.2

0.4

0.6

0.8

1.0

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

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

0.46

0.52

0.58

0.66

0.73

0.82

0.91

1.02

1.13

458

517

944

969

0.58

0.65

0.72

0.80

0.88

0.98

1.08

1.19

1.31

579

644

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

705

777

913

581

996

716

855

941

653

1023

1050

1078

1106

1135

1165

795

941

970

731

880

1034

1134

1242

1360

1485

999

817

973

1029

1059

1090

910

1074

1184

1302

1012

1122

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

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 2.40.

Bhp

3. See page 33 for general fan performance notes.

*Motor drive range: 1075 to 1455 rpm. All other rpms require field-

supplied drive.

—30—

Table 24 — Fan Performance 581B060, 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

1.0

Rpm

Watts

Rpm

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

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

—

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 1.30.

Bhp

3. See page 33 for general fan performance notes.

*Motor drive range: 1035 to 1460 rpm. All other rpms require field-

supplied drive.

Table 25 — Fan Performance 581B060, 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

1.0

Rpm

Watts

Rpm

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

1500

1600

1700

1800

1900

2000

2100

2200

2300

2400

2500

800

839

0.39

0.46

0.54

0.63

0.73

0.84

0.96

1.09

1.23

1.38

1.55

350

412

904

938

0.49

0.57

0.65

0.75

0.85

0.96

1.09

1.22

1.37

1.53

1.70

438

505

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

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

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

753

829

879

483

974

580

684

796

914

919

960

561

1010

1047

1085

1123

1162

1201

1241

1281

663

771

886

986

1008

1111

1224

1346

1479

1623

1778

1945

648

754

867

1001

1043

1085

1127

1169

1212

744

855

972

1095

1213

1342

1482

1633

1796

850

965

1086

1211

1347

1493

1652

966

1086

1217

1359

1513

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

—

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 2.40.

Bhp

3. See page 33 for general fan performance notes.

*Motor drive range: 1035 to 1460 rpm. All other rpms require field-

supplied drive.

—31—

Table 26 — Fan Performance 581B060 — Horizontal Discharge Units; High-Static Motor (Belt Drive)*

EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW

CFM

0.2

0.4

0.6

0.8

1.0

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

1500

1600

1700

1800

1900

2000

2100

2200

2300

2400

2500

800

839

0.39

0.46

0.54

0.63

0.73

0.84

0.96

1.09

1.23

1.38

1.55

350

412

904

938

0.49

0.57

0.65

0.75

0.85

0.96

1.09

1.22

1.37

1.53

1.70

438

505

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

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

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

753

829

879

483

974

580

684

796

914

919

960

561

1010

1047

1085

1123

1162

1201

1241

1281

663

771

886

986

1008

1111

1224

1346

1479

1623

1778

1945

648

754

867

1001

1043

1085

1127

1169

1212

744

855

972

1095

1213

1342

1482

1633

1796

850

965

1086

1211

1347

1493

1652

966

1086

1217

1359

1513

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

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 2.90.

Bhp

3. See page 33 for general fan performance notes.

*Motor drive range: 1300 to 1685 rpm. All other rpms require field-

supplied drive.

Table 27 — Fan Performance 581B072 — Horizontal Discharge Units; Standard Motor (Belt Drive)*

EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW

CFM

0.2

Bhp

0.4

Bhp

0.6

0.8

1.0

Rpm

Watts

Rpm

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

1800

1900

2000

2100

2200

2300

2400

2500

2600

2700

2800

2900

3000

913

952

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

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

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

—

992

744

903

1070

1184

1307

1440

1584

1738

1904

2081

—

1032

1073

1114

1155

1196

1238

1280

1322

1364

—

844

954

1010

1127

1254

1391

1538

1697

1867

2050

—

1074

1204

1345

1497

1660

1835

2023

—

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

—

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 2.40.

Bhp

3. See page 33 for general fan performance notes.

*Motor drive range: 1119 to 1585 rpm. All other rpms require field-

supplied drive.

—32—

Table 28 — Fan Performance 581B072 — Horizontal Discharge Units; High-Static Motor (Belt Drive)*

EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW

CFM

0.2

0.4

0.6

0.8

1.0

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

1800

1900

2000

2100

2200

2300

2400

2500

2600

2700

2800

2900

3000

913

952

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

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

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

—

992

744

903

1070

1184

1307

1440

1584

1738

1904

2081

2270

2472

—

1032

1073

1114

1155

1196

1238

1280

1322

1364

1406

844

954

1010

1127

1254

1391

1538

1697

1867

2050

2245

2452

1074

1204

1345

1497

1660

1835

2023

2224

—

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

—

LEGEND

— Brake Horsepower

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 2.90.

Bhp

3. See below for general fan performance notes.

*Motor drive range: 1300 to 1686 rpm. All other rpms require field-

supplied drive.

GENERAL FAN PERFORMANCE NOTES

1. Values include losses for filters, unit casing, and wet coils. See Fig. 38 and

Table 9 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 7 and 8 for additional information.

3. Use of a field-supplied motor may affect wire sizing. Contact your Bryant repre-

sentative to verify.

4. Interpolation is permissible. Do not extrapolate.

—33—

PRE-START-UP

START-UP

I. UNIT PREPARATION

WARNING: Failure to observe the following warn-

ings could result in serious personal injury.

Make sure that 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

refrigerant system.

II. GAS PIPING

Check gas piping for leaks.

2. Do not operate compressor or provide any elec-

tric power to unit unless compressor terminal

cover is in place and secured.

WARNING: Disconnect gas piping from unit when

leak testing at pressure greater than

sures greater than /₂psig will cause gas valve damage

psig. Pres-

3. Do not remove compressor terminal cover until

all electrical sources are disconnected.

resulting in hazardous condition. If gas valve is sub-

jected to pressure greater than

psig, it must be

4. Relieve all pressure from system before touch-

ing or disturbing anything inside terminal box

if refrigerant leak is suspected around compres-

sor terminals.

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 man-

ually closing the gas valve.

5. Never attempt to repair soldered connection

while refrigerant system is under pressure.

III. RETURN-AIR FILTERS

Make sure correct filters are installed in unit (see Table 1). Do

not operate unit without return-air filters.

6. Do not use torch to remove any component. Sys-

tem contains oil and refrigerant under pres-

sure. To remove a component, wear protective

goggles and proceed as follows:

IV. OUTDOOR-AIR INLET SCREENS

Outdoor-air inlet screen must be in place before operating

unit.

a. Shut off electrical power and then gas to

unit.

b. Recover refrigerant to relieve all pressure

from system using both high-pressure and

low-pressure ports.

c. Cut component connection tubing with tub-

ing cutter and remove component from

unit.

d. Carefully unsweat remaining tubing stubs

when necessary. Oil can ignite when

exposed to torch flame.

V. COMPRESSOR MOUNTING

Compressors are internally spring mounted. Do not loosen or

remove compressor holddown bolts.

VI. INTERNAL WIRING

Check all electrical connections in unit control boxes.

Tighten as required.

VII. REFRIGERANT SERVICE PORTS

Each unit system has 4 Schrader-type service ports: one on

the suction line, one on the liquid line, and 2 on the compres-

sor 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.

Proceed as follows to inspect and prepare the unit for initial

start-up:

1. Remove all access panels.

2. Read and follow instructions on all WARNING, CAU-

TION, and INFORMATION labels attached to, or

shipped with, unit.

VIII. HIGH FLOW REFRIGERANT VALVES

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.

3. Make the following inspections:

a. Inspect for shipping and handling damages such

as broken lines, loose parts, or disconnected

wires, etc.

b. Inspect for oil at all refrigerant tubing connec-

tions and on unit base. Detecting oil generally

indicates a refrigerant leak. Leak-test all refrig-

erant tubing connections using electronic leak

detector, halide torch, or liquid-soap solution.

c. Inspect all field-wiring and factory-wiring con-

nections. Be sure that connections are completed

and tight. Be sure that wires are not in contact

with refrigerant tubing or sharp edges.

IX. COMPRESSOR ROTATION

On 3-phase units with scroll compressors, it is important to

be certain compressor is rotating in the proper direction. To

determine whether or not compressor is rotating in the

proper direction:

d. Inspect coil fins. If damaged during shipping and

handling, carefully straighten fins with a fin

comb.

1. Connect service gages to suction and discharge pres-

sure fittings.

2. Energize the compressor.

4. Verify the following conditions:

3. The suction pressure should drop and the discharge

pressure should rise, as is normal on any start-up.

a. Make sure that condenser-fan blade are correctly

positioned in fan orifice. See Condenser-Fan

Adjustment section on page 38 for more details.

b. Make sure that air filter(s) is in place.

c. Make sure that condensate drain trap is filled

with water to ensure proper drainage.

If the suction pressure does not drop and the discharge pres-

sure does not rise to normal levels:

1. Note that the evaporator fan (size 060 and 072 only)

is probably also rotating in the wrong direction.

d. Make sure that all tools and miscellaneous loose

parts have been removed.

2. Turn off power to the unit and install lockout tag.

—34—

3. Reverse any two of the unit power leads.

Table 29B — Altitude Compensation* —

581B036-072 Low NOx Units

4. Reenergize to the compressor. Check pressures.

60,000 AND 90,000 BTUH

NOMINAL INPUT

120,000 BTUH

NOMINAL INPUT

The suction and discharge pressure levels should now move

to their normal start-up levels.

ELEVATION

(Ft)

Natural

Gas

Orifice

Size†

Liquid

Propane

Orifice

Size†

Natural

Liquid

Propane

Orifice

Size†

Gas

Orifice

Size†

NOTE: When the compressor is rotating in the wrong direc-

tion, the unit will make an elevated level of noise and will

not provide cooling.

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

X. COOLING

Set space thermostat to OFF position. To start unit, turn on

main power supply. Set system selector switch at COOL

position and fan switch at AUTO. position. Adjust thermo-

stat to a setting below room temperature. Compressor starts

on closure of contactor.

Check unit charge. Refer to Refrigerant Charge section on

page 38.

Reset thermostat at a position above room temperature.

Compressor will shut off. Evaporator fan will shut off after a

30-second delay.

*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 altitudes.

†Orifice available through your local Bryant distributor.

A. To Shut Off Unit

XII. HEATING

Set system selector switch at OFF position. Resetting ther-

mostat at a position above room temperature shuts unit off

temporarily until space temperature exceeds thermostat

setting. Units are equipped with Cycle-LOC™ protection

device. Unit shuts down on any safety trip, and indicator

light on thermostat comes on. Check reason for all safety

trips.

1. Purge gas supply line of air by opening union ahead

of the gas valve. If gas odor is detected, tighten union

and wait 5 minutes before proceeding.

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 temper-

ature lever above room temperature.

Compressor restart is accomplished by manual reset at the

thermostat by turning the selector switch to OFF and then to

ON position.

4. The induced-draft motor will start.

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.

XI. 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 ver-

ify 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.

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.

8. Adjust airflow to obtain a temperature rise within

the range specified on the unit nameplate.

Refer to Tables 29A and 29B for the correct orifice to use at

high altitudes.

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.

Table 29A — Altitude Compensation* —

581B036-072 Standard Units

72,000 AND 115,000 BTUH

NOMINAL INPUT

150,000 BTUH

NOMINAL INPUT

ELEVATION

(Ft)

Natural

Gas

Liquid

Propane

Orifice

Size†

Natural

Liquid

Propane

Orifice

Size†

Gas

Orifice

Size†

Orifice

Size†

If the limit switch trips at the start of the heating cycle dur-

ing 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.

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

The evaporator-fan off delay can also be modified. Once the

call for heating has ended, there is a 10-minute period dur-

ing 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.

*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 altitudes.

†Orifice available through your local Bryant distributor.

To restore the original default value, reset the power to the

unit.

—35—

A. To Shut Off Unit

decreases 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.

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.

Damper movement from full closed to full open (or vice

versa) will take between 1¹/₂and 2¹/₂minutes.

XIII. SAFETY RELIEF

A soft-solder joint at the suction service Schrader port

provides pressure relief under abnormal temperature and

pressure conditions.

If free cooling can be used as determined from the appropri-

ate changeover command (switch, dry bulb, enthalpy curve,

differential dry bulb, or differential enthalpy), a call for cool-

ing (Y1 closes at the thermostat) will cause the control to

modulate the dampers open to maintain the supply air tem-

perature set point at 50 to 55 F.

XIV. VENTILATION (Continuous Fan)

Set fan and system selector switches at ON and OFF posi-

tions, 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 damp-

ers closed to maintain the proper supply-air temperature.

D. Heating, Units With EconoMi$er IV

XV. OPERATING SEQUENCE

When the room temperature calls for heat, the heating con-

trols are energized as described in the Heating, Units With-

out Economizer section. When the thermostat is satisfied,

the economizer damper moves to the minimum position.

A. Cooling, Units Without Economizer

When thermostat calls for cooling, terminals G and Y1 and

the compressor contactor (C) are energized. The indoor

(evaporator) fan motor (IFM), compressor, and outdoor (con-

denser) fan motor (OFM) start. The OFM runs continuously

while the unit is in cooling. When the thermostat is satisfied,

C is deenergized and the compressor and OFM shut off. After

a 30-second delay, the IFM shuts off. If the thermostat fan

selector switch is in the ON position, the evaporator motor

will run continuously.

E. Units With Perfect Humidity™ Dehumidification

System

Normal Design Cooling Operation

When the rooftop operates under the normal sequence of

operation, the compressors will cycle to maintain indoor con-

ditions. See Fig. 41.

B. Heating, Units Without Economizer

The Perfect Humidity adaptive dehumidification system

includes a factory-installed Motormaster® low ambient con-

trol to keep the head and suction pressure high, allowing

normal design cooling mode operation down to 0° F.

When the thermostat calls for heating, terminal W1 is ener-

gized. 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. 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.

Subcooling Mode

When subcooling mode is initiated, this will energize (close)

the liquid line solenoid valve (LLSV) forcing the hot liquid

refrigerant to enter the subcooling coil (see Fig. 42).

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 fur-

ther 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 pres-

sure. 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 Acutrol™ device at the evaporator coil.

C. 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 avail-

able, 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 modu-

lated (open or close) to bring the supply-air temperature

back within the set points.

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 refriger-

ant 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.

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 mini-

mum position during the occupied mode.

If the increase in cooling capacity causes the supply-air tem-

perature 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.

Subcooling mode operates only when the outside-air temper-

ature is warmer than 40 F. A factory-installed temperature

switch located in the condenser section will lock out subcool-

ing 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 addi-

tional refrigerant charge required by the subcooling/reheat

coil.

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 CO₂sensors are connected to the

EconoMi$er IV control, a demand controlled ventilation

strategy will begin to operate. As the CO₂level in the zone

increases above the CO₂set point, the minimum position of

the damper will be increased proportionally. As the CO₂level

When in subcooling mode, there is a slight decrease in sys-

tem total gross capacity (5% less), a lower gross sensible

capacity (20% less), and a greatly increased latent capacity

(up to 40% more).

—36—

Hot Gas Reheat Mode

When the humidity levels in the space require humidity con-

trol, 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. 43).

This hot gas will mix with liquid refrigerant leaving the con-

denser 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.

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.

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 lock out this mode of operation.

Fig. 42 — Perfect Humidity Subcooling

Mode Operation

See Table 30 for the dehumidification system sequence of

operation.

Fig. 43 — Perfect Humidity Hot Gas

Reheat Mode Operation

Fig. 41 — Perfect Humidity™ Normal

Design Cooling Operation

Table 30 — Perfect Humidity Dehumidification System Sequence of Operation and

System Response — Single Compressor Unit

THERMOSTAT INPUT

ECONOMIZER FUNCTION

581B UNIT OPERATION

Subcooling Mode Hot Gas Reheat Mode

—

OAT. < Economizer Set Point

Economizer

Comp. 1

Normal Operation

Off

Yes

Off

Yes

LEGEND

OAT — Outdoor Air Temperature

NOTE: On a thermostat call for W1, all cooling and dehumidification will

be off.

—37—

SERVICE

D. Filters

Clean or replace at start of each heating and cooling season,

or more often if operating conditions require it. Replacement

filters must be same dimensions as original filters.

CAUTION: When servicing unit, shut off all elec-

trical power to unit and install lockout tag to avoid

shock hazard or injury from rotating parts.

E. Outdoor-Air Inlet Screens

Clean screen with steam or hot water and a mild detergent.

Do not use disposable filters in place of screen.

I. CLEANING

Inspect unit interior at the beginning of heating and cooling

season and as operating conditions require.

II. LUBRICATION

A. Compressors

A. Evaporator Coil

Each compressor is charged with correct amount of oil at the

factory.

1. Turn unit power off, tag disconnect. Remove evapora-

tor coil access panel.

B. Fan Motor Bearings

2. If economizer or two-position damper is installed,

remove economizer by disconnecting Molex plug and

removing mounting screws. Refer to accessory econo-

mizer installation instructions or Optional EconoMi$er

IV section on page 15 for additional information.

Fan motor bearings are of the permanently lubricated type.

No further lubrication is required. No lubrication of con-

denser-fan or evaporator-fan motors is required.

III. CONDENSER-FAN ADJUSTMENT (Fig. 47)

3. Slide filters out of unit.

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. 47. Tighten

setscrews and replace condenser-fan assembly.

4. Clean coil using a commercial coil cleaner or dish-

washer 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.

IV. ECONOMI$ER IV ADJUSTMENT

Refer to Optional EconoMi$er IV section on page 15.

5. Reinstall economizer and filters.

6. Reconnect wiring.

V. 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.

7. Replace access panels.

B. Condenser Coil

Inspect coil monthly. Clean condenser coil annually, and as

required by location and outdoor air conditions.

VI. 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.

One-Row Coil

Wash coil with commercial coil cleaner. It is not necessary to

remove top panel.

2-Row Coils

VII. LOSS-OF-CHARGE SWITCH

Clean coil as follows:

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.

1. Turn off unit power, tag disconnect.

2. Remove top panel screws on condenser end of unit.

VIII. FREEZE-STAT

3. Remove condenser coil corner post. See Fig. 44. To

hold top panel open, place coil corner post between

top panel and center post. See Fig. 45.

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.

4. Remove screws securing coil to compressor plate and

compressor access panel.

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. 46.

IX. 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 follow-

ing procedures.

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.

Unit panels must be in place when unit is operating during

charging procedure. Unit must operate

10 minutes before checking or adjusting refrigerant charge.

minimum of

7. Secure inner and outer coil rows together with a field-

supplied fastener.

An accurate superheat, thermocouple-type or thermistor-

type thermometer, and a gage 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.

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.

C. Condensate Drain

Check and clean each year at start of cooling season. In win-

ter, keep drain dry or protect against freeze-up.

—38—

A. No Charge

Use standard evacuating techniques. After evacuating sys-

tem to 500 microns, weigh in the specified amount of refrig-

erant. (Refer to Table 1 and unit information plate.)

B. Low Charge Cooling

Using Cooling Charging Charts, Fig. 48-51, 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 gage and

temperature sensing device are required. Connect the

pressure gage 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.

Fig. 44 — Cleaning Condenser Coil

C. Perfect Humidity™ System Charging

The system charge for units with the Perfect Humidity 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. 52-55. To charge systems using the

Perfect Humidity Dehumidification system, fully evacuate,

recover, and recharge the system to the unit information plate

specified charge level.

To check or adjust refrigerant charge on systems using the Per-

fect Humidity Dehumidification system, charge per Fig. 52-55.

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 dehumid-

ification coil liquid line solenoid valve MUST be energized to

use the charging charts and the outdoor motor speed control-

ler jumpered to run the fan at full speed.

Fig. 45 — Propping Up Top Panel

The charts reference a liquid pressure (psig) and tempera-

ture at

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. 52-55) are to be used ONLY with units having the

optional Perfect Humidity subcooling option. DO NOT use

standard charge (Fig. 48-51) for units with Perfect Humidity

system, and DO NOT use Fig. 52-55 for standard units.

D. To Use Cooling Charging Chart, Standard Unit

Take the outdoor ambient temperature and read the suction

pressure gage. Refer to charts to determine what suction tem-

perature should be. If suction temperature is high, add refrig-

erant. If suction temperature is low, carefully recover some of

the charge. Recheck the suction pressure as charge is adjusted.

Example (Fig. 50):

Outdoor Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 F

Suction Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70 psig

Suction Temperature should be . . . . . . . . . . . . . . . . . . . . 48 F

(Suction temperature may very ± 5 F.)

Fig. 46 — Separating Coil Sections

If charging device is used, temperature and pressure read-

ings must be accomplished using the charging charts.

UNIT 581B

FAN HEIGHT — “A” (in.)

036-060 and 072 (208/230 V)

072 (460 and 575 V)

2.75

3.50

Fig. 47 — Condenser-Fan Adjustment

—39—

Fig. 50 — Cooling Charging Chart, Standard 581B060

Fig. 48 — Cooling Charging Chart, Standard 581B036

Fig. 49 — Cooling Charging Chart, Standard 581B048

Fig. 51 — Cooling Charging Chart, Standard 581B072

—40—

CONDENSER FAN MUST BE OPERATING

NOTE: When using the charging charts, it is important that only the subcooling/reheat dehu-

midification coil liquid line solenoid valve be energized. The subcooling/reheat dehumidifica-

tion 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.

NOTE: When using the charging charts, it is important that only the subcooling/reheat dehu-

midification coil liquid line solenoid valve be energized. The subcooling/reheat dehumidifica-

tion 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.

Fig. 52 — Cooling Charging Chart, 581B036 with the

Perfect Humidity Dehumidification System

Fig. 54 — Cooling Charging Chart, 581B060 with the

Perfect Humidity Dehumidification System

CONDENSER FAN MUST BE OPERATING

NOTE: When using the charging charts, it is important that only the subcooling/reheat dehu-

midification coil liquid line solenoid valve be energized. The subcooling/reheat dehumidifica-

tion 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.

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 dehu-

midification 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.

Fig. 53 — Cooling Charging Chart, 581B048 with the

Perfect Humidity Dehumidification System

Fig. 55 — Cooling Charging Chart, 581B072 with the

Perfect Humidity Dehumidification System

—41—

E. To Use Cooling Charging Charts, Units With Perfect

Humidity™ Dehumidification System

Refer to charts (Fig. 52-55) to determine the proper leaving

condenser pressure and temperature.

Example (Fig. 52):

Leaving Condenser Pressure. . . . . . . . . . . . . . . . . . . .250 psig

Leaving Condenser Temperature . . . . . . . . . . . . . . . . . . 105 F

Table 31 — LED Error Code Description*

LED INDICATION

ERROR CODE DESCRIPTION

Normal Operation

OFF

Hardware Failure

1 Flash†

2 Flashes

3 Flashes

4 Flashes

5 Flashes

6 Flashes

7 Flashes

8 Flashes

9 Flashes

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

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 dehumid-

ification coil liquid line solenoid valve MUST be energized to

use the charging charts and the outdoor motor speed control-

ler jumpered to run the fan at full speed.

X. FLUE GAS PASSAGEWAYS

To inspect the flue collector box and upper areas of the heat

exchanger:

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

numerical sequence.

†Indicates a code that is not an error. The unit will continue to operate

when this code is displayed.

1. Remove the combustion blower wheel and motor

assembly according to directions in Combustion-Air

Blower section following.

2. Remove the 3 screws holding the blower housing to

the flue cover.

IMPORTANT: Refer to Troubleshooting Tables 32-36 for additional

information.

3. Remove the flue cover to inspect the heat exchanger.

4. Clean all surfaces as required using a wire brush.

XIV. MAIN BURNERS

At the beginning of each heating season, inspect for deteriora-

tion or blockage due to corrosion or other causes. Observe the

main burner flames and adjust, if necessary.

XI. COMBUSTION-AIR BLOWER

Clean periodically to ensure proper airflow and heating effi-

ciency. Inspect blower wheel every fall and periodically during

heating season. For the first heating season, inspect blower

wheel bimonthly to determine proper cleaning frequency.

CAUTION: When working on gas train, do not hit

or plug orifice spuds.

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:

A. Removal and Replacement of Gas Train (See Fig. 56

and 57)

1. Slide burner access panel out.

1. Shut off manual gas valve.

2. Remove the 5 screws that attach induced-draft motor

assembly to the vestibule cover.

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.

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.

6. Remove wires connected to gas valve. Mark each

wire.

4. To remove blower from the motor shaft, by remove

2 setscrews.

7. Remove induced-draft motor, ignitor, and sensor

wires at the Integrated Gas Unit Controller (IGC).

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.

8. Remove the 2 screws that attach the burner rack to

the vestibule plate.

9. Remove the gas valve bracket.

10. Slide the burner tray out of the unit (Fig. 57).

11. To reinstall, reverse the procedure outlined above.

6. To reinstall, reverse the procedure outlined above.

XII. LIMIT SWITCH

B. Cleaning and Adjustment

Remove blower access panel (Fig. 7). Limit switch is located

on the fan deck.

1. Remove burner rack from unit as described above.

2. Inspect burners and, if dirty, remove burners from

rack.

XIII. BURNER IGNITION

Unit is equipped with a direct spark ignition 100% lockout

system. Integrated Gas Unit Controller (IGC) is located in

the control box (Fig. 12). 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 servic-

ing, refer to the label on the control box cover or Table 31 for

an explanation of LED error code descriptions.

3. Using a soft brush, clean burners and cross-over port

as required.

4. Adjust spark gap. See Fig. 58.

5. Reinstall burners on rack.

6. Reinstall burner rack as described above.

XV. REPLACEMENT PARTS

A complete list of replacement parts may be obtained from

your Bryant distributor upon request. Refer to Fig. 59 for a

typical unit wiring schematic.

If lockout occurs, unit may be reset by interrupting power

supply to unit for at least 5 seconds.

—42—

INDUCED-

DRAFT

ROLLOUT

SWITCH

MOTOR

MOUNTING

PLATE

BURNER

SECTION

FLUE

EXHAUST

VESTIBULE

PLATE

INDUCED-

DRAFT

MOTOR

Fig. 57 — Burner Tray Details

BLOWER

HOUSING

MANIFOLD

PRESSURE

TAP

GAS

VALVE

Fig. 56 — Burner Section Details

LOW HEAT UNITS

581B036060N

60,000 BTUH

INPUT

581B048060N

581B060060N

581B036071

581B036072

581B048071

581B048072

581B060071

581B060072

581B072072

72,000 BTUH

INPUT

MEDIUM AND

HIGH HEAT UNITS

581B036090N

90,000 BTUH

581B048090N

INPUT

581B060090N

581B036114

581B036115

581B048114

115,000 BTUH

581B048115

INPUT

581B060114

581B060115

581B072115

581B048120N

581B060120N

581B048149

581B048150

581B060149

581B060150

581B072150

120,000 BTUH

INPUT

150,000 BTUH

INPUT

Fig. 58 — Spark Gap Adjustment

—43—

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

—

Outdoor (Condenser) Fan Motor

Overload Relay

—

Contactor, Compressor

Capacitor

Compressor Lockout

Compressor Motor

Equipment

Freeze Up Protection Thermostat

Fuse

Ground

High-Pressure Switch

Hall-Effect Sensor

Ignitor

CAP

CLO

COMP

EQUIP

FPT

Splice

Plug

Plug Assembly

Quadruple Terminal

Rollout Switch

Supply Air Temperature Sensor

Transformer

Splice (Marked)

Factory Wiring

SAT

TRAN

GND

HPS

Field Control Wiring

Field Splice

Field Power Wiring

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

MGV

Main Gas Valve

Fig. 59 — Typical Wiring Schematic and Component Arrangement (208/230-3-60 Shown)

—44—

TROUBLESHOOTING

I. UNIT TROUBLESHOOTING

Refer to Tables 32-36.

Table 32 — LED Error Code Service Analysis

CAUSE

SYMPTOM

REMEDY

Hardware Failure

(LED OFF)

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.

Fan ON/OFF Delay Modified High limit switch opens during heat

IGC board has modified either blower on delay time or blower off

delay time.

(LED/FLASH)

exchanger warm-up period before fan-on

delay expires.

Limit switch opens within three minutes

after blower-off delay timing in Heating mode.

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

Switch Faults

(LED 4 Flashes)

Inadequate airflow to unit.

Check operation of indoor (evaporator) fan motor and that supply-air

temperature rise agrees with range on unit nameplate information.

Ignition Lockout

(LED 5 Flashes)

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 routed

and terminated. Verify that unit is obtaining proper amount of gas.

Induced-Draft Motor Fault

(LED 6 Flashes)

IGC does not sense that induced-draft

motor is operating.

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.

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

Lockout

(LED 9 Flashes)

Electrical interference is impeding the IGC

software.

Reset 24-v to control board or turn thermostat off and then on.

Fault will automatically reset itself in one hour.

IMPORTANT: Refer to heating troubleshooting for additional heating

CAUTION: 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 pre-

cautions are not taken.

section troubleshooting information.

LEGEND

IGC — Integrated Gas Unit Controller

LED — Light-Emitting Diode

—45—

Table 33 — Heating Service Analysis

PROBLEM

CAUSE

REMEDY

Burners Will Not

Ignite

Misaligned spark electrodes.

No gas at main burners.

Check flame ignition and sensor electrode positioning. Adjust as needed.

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 unit.

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 necessary.

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 suit-

able 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

Characteristics

Incomplete combustion (lack of

combustion air) results in:

Check all screws around flue outlets and burner compartment.

Tighten as necessary.

Aldehyde odors, CO (carbon monoxide),

sooting flame, or floating flame.

Cracked heat exchanger. Replace heat exchanger.

Overfired unit — reduce input, change orifices, or adjust gas line or mani-

fold 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 34 — Perfect Humidity™ Adaptive Dehumidification System Subcooling Mode Service Analysis

PROBLEM

CAUSE

REMEDY

Subcooling Mode (Liquid Reheat)

Will Not Energize.

No power to control transformer from

evaporator-fan motor.

Check power source and evaporator-fan relay. Ensure all

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. 52-55.

2. Evaporator coil frosted; check and replace low-

pressure 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 suction

line.

2. Replace TXV if stuck open or closed.

Table 35 — Perfect Humidity Dehumidification System Hot Gas Reheat Mode Service Analysis

PROBLEM

CAUSE

REMEDY

Reheat Mode Will Not Energize.

No power to control transformer from

evaporator-fan motor.

Check power source and evaporator-fan relay. Ensure all

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. 52-55.

2. Evaporator coil frosted; check and replace low-

pressure 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 suction

line.

2. Replace TXV if stuck open or closed.

Excessive Superheat.

Liquid line solenoid valve will not operate.

Hot gas line solenoid valve will not close.

Valve is stuck; replace valve.

—46—

Table 36 — Cooling Service Analysis

CAUSE

PROBLEM

REMEDY

Compressor and Condenser Fan

Will Not Start

Power failure.

Fuse blown or circuit breaker tripped.

Defective thermostat, contactor, transformer,

or control relay.

Call power company.

Replace fuse or reset circuit breaker.

Replace component.

Insufficient line voltage.

Incorrect or faulty wiring.

Thermostat setting too high.

Faulty wiring or loose connections in com-

pressor circuit.

Determine cause and correct.

Check wiring diagram and rewire correctly.

Lower thermostat setting below room temperature.

Check wiring and repair or replace.

Compressor Will Not Start

But Condenser Fan Runs

Compressor motor burned out, seized, or

internal overload open.

Defective run/start capacitor, overload, start

relay.

Determine cause. Replace compressor.

Determine cause and replace.

One leg of 3-phase power dead.

Replace fuse or reset circuit breaker. Determine

cause.

Compressor Cycles (Other Than

Normally Satisfying Thermostat)

Refrigerant overcharge or undercharge.

Recover refrigerant, evacuate system, and recharge

to nameplate.

Defective compressor.

Insufficient line voltage.

Blocked condenser.

Defective run/start capacitor, overload, or

start relay.

Replace and determine cause.

Determine cause and correct.

Determine cause and replace.

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

recharge.

Condenser coil dirty or restricted.

Dirty air filter.

Clean coil or remove restriction.

Replace filter.

Excessive Head Pressure

Dirty condenser coil.

Refrigerant overcharged.

Air in system.

Clean coil.

Recover excess refrigerant.

Recover refrigerant, evacuate system, and

recharge.

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.

Head Pressure Too Low

Excessive Suction Pressure

Suction Pressure Too Low

Recover excess refrigerant.

Replace filter.

Low refrigerant charge.

Metering device or low side restricted.

Insufficient evaporator airflow.

Check for leaks, repair, and recharge.

Remove source of restriction.

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

—47—

II. ECONOMI$ER IV TROUBLESHOOTING

D. DCV (Demand Controlled Ventilation) and Power

Exhaust

See Table 37 for EconoMi$er IV logic.

To check DCV and Power Exhaust:

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 avail-

able from Bryant to help with EconoMi$er IV training and

troubleshooting.

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.

A. EconoMi$er IV Preparation

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.

This procedure is used to prepare the EconoMi$er IV for

troubleshooting. No troubleshooting or testing is done by

performing the following procedure.

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.

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.

IMPORTANT: Be sure to record the positions of all potenti-

ometers before starting troubleshooting.

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 9 v. The

actuator should drive fully closed.

1. Disconnect power at TR and TR1. All LEDs should be

off. Exhaust fan contacts should be open.

2. Disconnect device at P and P1.

3. Jumper P to P1.

6. Turn the DCV and Exhaust potentiometers CCW

until the Exhaust LED turns on. The exhaust con-

tacts will close 30 to 120 seconds after the Exhaust

LED turns on.

4. Disconnect wires at T and T1. Place 5.6 kilo-ohm

resistor across T and T1.

5. Jumper TR to 1.

6. Jumper TR to N.

7. Return EconoMi$er IV settings and wiring to normal

after completing troubleshooting.

7. If connected, remove sensor from terminals S_Oand +.

Connect 1.2 kilo-ohm 4074EJ M checkout resistor

across terminals S_Oand +.

E. DCV Minimum and Maximum Position

To check the DCV minimum and maximum position:

8. Put 620-ohm resistor across terminals S_Rand +.

1. Make sure EconoMi$er IV preparation procedure has

been performed.

9. Set minimum position, DCV set point, and exhaust

potentiometers fully CCW (counterclockwise).

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.

10. Set DCV maximum position potentiometer fully CW

(clockwise).

3. Turn the DCV Maximum Position potentiometer to

midpoint. The actuator should drive to between 20

and 80% open.

11. Set enthalpy potentiometer to D.

12. Apply power (24 vac) to terminals TR and TR1.

B. Differential Enthalpy

4. Turn the DCV Maximum Position potentiometer to

fully CCW. The actuator should drive fully closed.

To check differential enthalpy:

1. Make sure EconoMi$er IV preparation procedure has

been performed.

5. Turn the Minimum Position potentiometer to mid-

point. The actuator should drive to between 20 and

80% open.

2. Place 620-ohm resistor across S_Oand +.

6. Turn the Minimum Position Potentiometer fully CW.

The actuator should drive fully open.

3. Place 1.2 kilo-ohm resistor across S_Rand +. The Free

Cool LED should be lit.

7. Remove the jumper from TR and N. The actuator

should drive fully closed.

4. Remove 620-ohm resistor across S_Oand +. The Free

Cool LED should turn off.

8. Return EconoMi$er IV settings and wiring to normal

after completing troubleshooting.

5. Return EconoMi$er IV settings and wiring to normal

after completing troubleshooting.

F. Supply-Air Input

C. Single Enthalpy

To check supply-air input:

To check single enthalpy:

1. Make sure EconoMi$er IV preparation procedure has

been performed.

1. Make sure EconoMi$er IV preparation procedure has

been performed.

2. Set the Enthalpy potentiometer to A. The Free Cool

LED turns on. The actuator should drive to between

20 and 80% open.

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.

3. Remove the 5.6 kilo-ohm resistor and jumper T to T1.

The actuator should drive fully open.

4. Return EconoMi$er IV settings and wiring to normal

after completing troubleshooting.

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.

—48—

G. EconoMi$er IV Troubleshooting Completion

6. Remove 1.2 kilo-ohm checkout resistor from termi-

nals S_Oand +. If used, reconnect sensor from termi-

nals S_Oand +.

This procedure is used to return the EconoMi$er IV to opera-

tion. No troubleshooting or testing is done by performing the

following procedure.

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.

9. Remove 5.6 kilo-ohm resistor from T and T1. Recon-

nect wires at T and T1.

3. Set DCV maximum position potentiometer to previ-

ous setting.

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.

5. Remove 620-ohm resistor from terminals S_Rand +.

Table 37 — EconoMi$er IV Input/Output Logic

INPUTS

Enthalpy*

OUTPUTS

Compressor

N Terminal†

Demand Control

Ventilation (DCV)

Y1 Y2

Occupied

Minimum position

Unoccupied

Stage Stage

Outdoor

Return

Damper

Below set

(DCV LED Off)

High

Low

On On

On Off

Off Off

On On

On Off

Off Off

On On

On Off

Off Off

On On

On Off

Off Off

Off

Closed

(Free Cooling LED Off)

Low

High

Low

High

Modulating** (between min.

position and full-open)

Modulating** (between

closed and full-open)

(Free Cooling LED On)

Minimum position

Modulating†† (between min.

position and DCV maximum)

Closed

Above set

(DCV LED On)

High

Modulating†† (between

closed and DCV

maximum)

(Free Cooling LED Off)

Low

Modulating***

Modulating†††

(Free Cooling LED On)

***Modulation is based on the greater of DCV and supply-air sensor

signals, between minimum position and either maximum position

(DCV) or fully open (supply-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 signal).

*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.

Fig. 60 — EconoMi$er IV Functional View

—49—

INDEX

Access panels 15

Heat exchanger

Weight

Corner

EconoMi$er IV 6, 8

Unit 5, 6, 8

Wiring

Altitude compensation 35

Barometric flow capacity 17

Burner ignition 42

High flow valves 34

High pressure switch

Horizontal units 1, 2

Humidistat 13

Burner rack 43

Burner section 43

Burner spark gap 43

Charging chart, refrigerant 40, 41

Indoor air quality sensor 19

Integrated gas controller 42

Error codes 42, 45

Leak test 34

Light commercial Thermistat™ device 13

Limit switch 42

Humidistat 13

EconoMi$er IV 17

Perfect Humidity dehumidification 14

Power connections 10

Thermostat 10

Clearance

CO₂sensor

Configuration 21

Settings 20, 22

Combustion blower wheel 42

Compressor

Unit 44

Liquid propane

Low pressure switch

Main burners 35, 42

Lubrication 38

Mounting 34

Manual outdoor air damper 14

Mounting

Rotation 34

Compressor 34

Condensate drain

Cleaning 38

Location 2, 4

Condenser coil

Cleaning 38

Condenser fan

Unit

Natural gas

Non-fused disconnect switch 13

Operating limits

Operating sequence 36

Cooling 36

Adjustment 38, 39

Control circuit

EconoMi$er IV 36

Heating 36

Wiring

Perfect Humidity dehumidification 36, 37

Outdoor air hood 14-16

Outdoor air temperature sensor 16

Outdoor air inlet screens 34

Wiring raceway 10

Convenience outlet 14

Demand control ventilation 21

Dehumidification 21

Dimensions 3, 8

Dimensions

Perfect Humidity dehumidification

package 13, 14, 23, 36, 39, 41, 46

Physical data 6, 7

Ductwork

EconoMi$er IV 15-21

Adjustment 38

Components 15

Controller 20

Power supply

Wiring 10

Pressure, drop

Damper movement 21

Wiring 17

Perfect Humidity dehumidification 23

Pre-Start-Up 34

Electrical connections

Electrical data 11, 12

Enthalpy changeover set points 20

Pressure switches

High pressure 7, 38

Low pressure 7, 38

Refrigerant

Evaporator coil

Cleaning 38

Evaporator fan motor

Lubrication 38

Motor data 23, 24

Performance 24-33

Pulley adjustment 23

Pulley setting 6, 22

Charge 6, 38-42

Type

Refrigerant service ports 34

Replacement parts 42

Return air filter 7, 34

Return air temperature sensor 19

Rigging unit 4, 5

Speed

Roof curb

Factory-installed options

Convenience outlet 14

Disconnect switch 13

EconoMi$er IV 15-21

Humidistat 13

Manual outdoor air damper 14

Perfect Humidity™ dehumidification 13

Filter

Assembly

Dimensions

Connector package

Leveling tolerances

Weight

Safety considerations

Safety relief 36

Service 38-44

Cleaning 38

Service ports 34

Installation 16

Slab mount

Start-up 34-37

Size

Flue gas passageways 42

Flue hood 4, 9

Freeze protection thermostat 7, 38

Start-up checklist CL-1

Thermostat 9, 10

Troubleshooting 45-49

Ventilation 36

Gas connection

Gas input

Gas piping 4, 9, 34

Gas pressure 1, 7

Heat anticipator settings 7, 9

Printed in U.S.A.

CATALOG NO. 04-53581002-01

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)

VERIFY THAT JOBSITE VOLTAGE AGREES WITH VOLTAGE LISTED ON RATING PLATE

VERIFY THAT ALL PACKING 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

CHECK TO ENSURE THAT ELECTRICAL WIRING IS NOT IN CONTACT WITH REFRIGERANT LINES

OR SHARP METAL EDGES

CHECK PULLEY ALIGNMENT AND BELT TENSION PER INSTALLATION INSTRUCTIONS

III. START-UP

ELECTRICAL

SUPPLY VOLTAGE

COMPRESSOR AMPS

INDOOR-FAN AMPS

L1-L2

L2-L3

L3-L1

TEMPERATURES

OUTDOOR-AIR TEMPERATURE

RETURN-AIR TEMPERATURE

COOLING SUPPLY AIR

GAS HEAT SUPPLY AIR

PRESSURES

GAS INLET PRESSURE

IN. WG

GAS MANIFOLD PRESSURE

REFRIGERANT SUCTION

REFRIGERANT DISCHARGE

IN. WG

PSIG

VERIFY REFRIGERANT CHARGE USING CHARGING TABLES

VERIFY THAT 3-PHASE SCROLL COMPRESSOR ROTATING IN CORRECT DIRECTION

Printed in U.S.A.

CL-1

CATALOG NO. 04-53581002-01

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