York Affinity Series R 410a User Manual

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R-410A  
AFFINITY SERIES  
DNX024-048  
2-4 Ton  
TABLE OF CONTENTS  
LIST OF TABLES  
LIST OF FIGURES  
Safety Considerations  
General  
®
This is a safety alert symbol . When you see this symbol on  
labels or in manuals, be alert to the potential for personal injury.  
YORK Affinity Model DNX units are cooling/heating air  
conditioners designed for outdoor installation. Only gas piping,  
electric power and duct connections are required at the point of  
installation.  
Understand and pay particular attention the signal words  
DANGER, WARNING or CAUTION.  
The single or two stage gas-fired heaters have spark to pilot  
ignition. The tubular heat exchangers are aluminized steel.  
DANGER indicates an imminently hazardous situation, which,  
if not avoided, will result in death or serious injury.  
The refrigerant system is fully charged with R-410A Refrigerant,  
and is tested and factory sealed.  
WARNING indicates a potentially hazardous situation, which,  
if not avoided, could result in death or serious injury.  
CAUTION indicates a potentially hazardous situation, which, if  
not avoided may result in minor or moderate injury. It is also  
used to alert against unsafe practices and hazards involving  
only property damage.  
279550-YIM-A-0207  
 
279550-YIM-A-0207  
3. For installation on combustible material and may be  
installed directly on combustible flooring or, in the U.S., on  
wood flooring or Class A, Class B or Class C roof covering  
materials.  
Improper installation may create a condition where the  
operation of the product could cause personal injury or  
property damage.  
4. For use with natural gas (convertible to LP with kit).  
This product must be installed in strict compliance with  
the enclosed installation instructions and any applicable  
local, state, and national codes including, but not limited  
to, building, electrical, and mechanical codes.  
This system uses R-410A Refrigerant which operates at  
higher pressures than R-22. No other refrigerant may be  
used in this system.  
Nomenclature  
D 1 NX 036 N 036 06  
Product Category  
Voltage Code  
D = Single Package Air Conditioner  
06 = 208/230-1-60  
25 = 208/230-3-60  
46 = 460-3-60  
Product Generation  
1 = 1st Generation  
2 = 2nd Generation  
Nominal Gas Heating Output Capacity  
(Nominal Low Gas Heat Output Capacity)  
Factory Installed Gas Heat  
Product Identifier  
036 = 36,000 BTUH  
056 = 56,000 BTUH (36,400 BTUH)  
065 = 65,000 BTUH  
N = Single Stage  
D = Two Stage  
NX = R-410A 15 SEER  
Gas Heat/Electric  
072 = 72,000 BTUH (46,800 BTUH)  
090 = 90,000 BTUH (56,160 BTUH)  
110 = 110,000 BTUH (70,200 BTUH)  
Nominal Cooling Capacity (MBH)  
024 = 24,000 BTUH  
036 = 36,000 BTUH  
048 = 48,000 BTUH  
Installation  
Installation Safety Information  
FIRE OR EXPLOSION HAZARD  
Read these instructions before continuing this appliance  
installation. This is an outdoor combination heating and cooling  
unit. The installer must assure that these instructions are made  
available to the consumer and with instructions to retain them  
for future reference.  
Failure to follow the safety warning exactly could result  
in serious injury, death or property damage.  
Never test for gas leaks with an open flame. use a  
commercially available soap solution made specifically  
for the detection of leaks to check all connections. A fire  
or explosion may result causing property damage,  
personal injury or loss of life.  
1. Refer to the unit rating plate for the approved type of gas  
for this product.  
2. Install this unit only in a location and position as specified  
on Page 5 of these instructions.  
Limitations  
3. Never test for gas leaks with an open flame. Use  
commercially available soap solution made specifically for  
the detection of leaks when checking all connections, as  
specified on Pages 3 and 16 of these instructions.  
These units must be installed in accordance with the following:  
In U.S.A.:  
1. National Electrical Code, ANSI/NFPA No. 70 - Latest Edition  
2. National Fuel Gas Code, ANSI Z223.1 - Latest Edition  
4. Always install furnace to operate within the furnace's  
intended temperature-rise range with the duct system and  
within the allowable external static pressure range, as  
specified on the unit name/rating plate, specified on  
Page 17 of these instructions.  
3. Gas-Fired Central Furnace Standard, ANSI Z21.47a. -  
Latest Edition  
4. Local building codes, and  
5. This equipment is not to be used for temporary heating of  
buildings or structures under construction.  
5. Local gas utility requirements  
Unitary Products Group  
3
       
279550-YIM-A-0207  
In Canada:  
If components are to be added to a unit to meet local codes,  
they are to be installed at the dealer’s and/or customer’s  
expense.  
1. Canadian Electrical Code, CSA C22.1  
2. Installation Codes, CSA - B149.1.  
3. Local plumbing and waste water codes, and  
4. Other applicable local codes.  
Size of unit for proposed installation should be based on heat  
loss/heat gain calculation made according to the methods of Air  
Conditioning Contractors of America (ACCA).  
Refer to unit application data found in this document.  
This furnace is not to be used for temporary heating of buildings  
or structures under construction.  
After installation, gas fired units must be adjusted to obtain a  
temperature rise within the range specified on the unit rating plate.  
Direct Drive  
Condenser Fan Motor  
Blow-Through Design With  
Reliable Aluminized Steel  
Tubular Heat Exchangers  
Highly Efficient Enhanced Copper  
Tube/Aluminum Fin Evaporator Coil  
Highly Efficient Enhanced Copper  
Tube/Aluminum Fin Condenser Coil  
Long Lasting Powder  
Paint Finish  
Decorative Protective  
Coil Guard  
High Efficiency  
Compressor Rigidly  
Mounted  
Rear and Bottom Return Air  
and Supply Airduct Openings  
Pilot Assembly  
High Grade Aluminized In-Shot Burners  
Low Voltage Terminal Block  
Heavy Gauge  
Removable Base Rails  
Self-Diagnostic Controls  
Direct Drive Blower Motor With  
Slide-Out Blower Assembly  
Automatic Gas Valve (1/2" - 14 NPTI)  
Power Draft Motor  
High Voltage  
Terminal Block  
Figure 1: Component Location  
Table 1: Unit Limitations  
Unit Limitations  
Applied Voltage  
Size  
(Tons)  
Unit Voltage  
Outdoor DB Temp  
Max (°F)  
Min  
Max  
024  
(2.0)  
208/230-1-60  
187  
252  
115  
208/230-1-60  
208/230-3-60  
460-3-60  
187  
187  
432  
187  
187  
432  
252  
252  
504  
252  
252  
504  
115  
115  
115  
115  
115  
115  
036  
(3.0)  
208/230-1-60  
208/230-3-60  
460-3-60  
048  
(4.0)  
4
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279550-YIM-A-0207  
codes. Refer to Table 5 for clearances required for combustible  
construction, servicing, and proper unit operation.  
Location  
Use the following guidelines to select a suitable location for  
these units:  
1. Unit is designed for outdoor installation only.  
2. Condenser coils must have an unlimited supply of air.  
Where a choice of location is possible, position the unit on  
either north or east side of building.  
Do not permit overhanging structures or shrubs to  
obstruct condenser air discharge outlet, combustion air  
inlet or vent outlets.  
3. Suitable for mounting on roof curb.  
4. For ground level installation, a level pad or slab should be  
used. The thickness and size of the pad or slab used  
should meet local codes and unit weight. Do not tie the  
slab to the building foundation.  
Rigging And Handling  
Exercise care when moving the unit. Do not remove any  
packaging until the unit is near the place of installation. Rig the  
unit by attaching chain or cable slings to the lifting holes  
provided in the base rails. Spreader bars, whose length  
exceeds the largest dimension across the unit, MUST be used  
across the top of the unit.  
5. Roof structures must be able to support the weight of the  
unit and its options/accessories. Unit must be installed on a  
solid, level roof curb or appropriate angle iron frame.  
6. Maintain level tolerance to 1/8” across the entire width and  
length of unit.  
If a unit is to be installed on a roof curb other than a  
®
York roof curb, gasketing must be applied to all  
surfaces that come in contact with the unit underside.  
Excessive exposure of this furnace to contaminated  
combustion air may result in equipment damage or  
personal injury. Typical contaminates include:  
permanent wave solution, chlorinated waxes and  
cleaners, chlorine based swimming pool chemicals,  
water softening chemicals, carbon tetrachloride,  
Halogen type refrigerants, cleaning solvents (e.g.  
perchloroethylene), printing inks, paint removers,  
varnishes, hydrochloric acid, cements and glues,  
antistatic fabric softeners for clothes dryers, masonry  
acid washing materials.  
Before lifting, make sure the unit weight is distributed  
equally on the rigging cables so it will lift evenly.  
Units may be moved or lifted with a forklift. Slotted openings in  
the base rails are provided for this purpose.  
Clearances  
All units require particular clearances for proper operation and  
service. Installer must make provisions for adequate  
combustion and ventilation air in accordance with section 5.3 of  
Air for Combustion and Ventilation of the National Fuel Gas  
Code, ANSI Z223.1 – Latest Edition (in U.S.A.), or Sections 7.2,  
7.3, or 7.4 of Gas Installation Codes, CSA-B149.1 (in Canada) -  
Latest Edition, and/or applicable provisions of the local building  
All panels must be secured in place when the unit is  
lifted.  
The condenser coils should be protected from rigging  
cable damage with plywood or other suitable material.  
Unitary Products Group  
5
   
279550-YIM-A-0207  
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Figure 2: Unit 4 Point Load Weight  
Table 2: Weights and Dimensions  
Weight (lbs.)  
Shipping Operating  
Center of Gravity  
4 Point Load Location (lbs.)  
Size  
(Tons)  
024  
(2.0)  
036  
(3.0)  
048  
(4.0)  
X
Y
A
B
C
D
445  
445  
505  
440  
440  
500  
20  
24.5  
127  
93  
93  
127  
20  
20  
24.25  
24  
126  
142  
91  
93  
129  
149  
102  
107  
Table 3: Unit Accessory Weights  
Weight (lbs.)  
Unit Accessory  
Model  
Shipping  
45  
Operating  
Add Economizer  
All  
40  
6
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Figure 3: Unit Dimensions  
Table 4: Unit Dimensions  
Unit Size  
Dimensions  
“A”  
“B”  
024  
33-1/2  
41-1/2  
18-1/4  
23-1/8  
036, 048  
1 2  
Table 5: Unit Clearances  
Direction  
Distance  
(in.)  
Distance  
(in.)  
Direction  
Top3  
Front  
Rear  
36  
36  
0
Right  
Left  
Bottom4  
12  
24  
0
1. A 1" clearance must be provided between any combustible material and the supply air duct work.  
2. The products of combustion must not be allowed to accumulate within a confined space and recirculate.  
3. Units must be installed outdoors. Over hanging structure or shrubs should not obscure condenser air  
discharge outlet.  
4. Units may be installed on combustable floors made from wood or class A, B or C roof covering  
materials.  
Unitary Products Group  
7
     
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Figure 4: Dimensions Front and Bottom  
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Figure 5: Dimensions Back and Bottom  
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Figure 6: Roof Curb  
Ductwork  
Roof Curb  
These units are adaptable to downflow use as well as rear  
supply and return air duct openings. To convert to downflow,  
use the following steps:  
On applications when a roof curb is used, the unit must be  
positioned on the curb so the front of the unit is tight against the  
curb.  
1. Remove the duct covers found in the bottom return and  
supply air duct openings. There are four (4) screws  
securing each duct cover (save these screws to use in  
Step 2).  
Filters  
Single phase units are shipped without a filter or filter racks. It is  
the responsibility of the installer to secure a filter in the return air  
ductwork or install a Filter/Frame Kit (1FF0110).  
2. Install the duct covers (removed in step one) to the rear  
supply and return air duct openings. Secure with the four  
(4) screws used in step one.  
A filter rack and high velocity filters are standard on three phase  
units.  
3. Seal duct covers with silicone caulk.  
Filters must always be used and must be kept clean. When  
filters become dirt laden, insufficient air will be delivered by the  
blower, decreasing your units efficiency and increasing  
operating costs and wear-and-tear on the unit and controls.  
Duct work should be designed and sized according to the  
methods of the Air Conditioning Contractors of America  
(ACCA), as set forth in their Manual D.  
A closed return duct system shall be used. This shall not  
preclude use of economizers or ventilation air intake. Flexible  
joints may be used in the supply and return duct work to  
minimize the transmission of noise.  
Filters should be checked monthly; this is especially important  
since this unit is used for both heating and cooling.  
Condensate Drain  
NOTE: Be sure to note supply and return openings.  
A condensate trap is recommended to be installed in the  
condensate drain. The plumbing must conform to local codes.  
Refer to Figures 4 and 5 for information concerning rear and  
bottom supply and return air duct openings.  
Use a sealing compound on male pipe threads. Install the  
condensate drain line (3/4” NPTF) to spill into an open drain.  
1. 8” Roof Curb also available.  
Unitary Products Group  
9
         
279550-YIM-A-0207  
Service Access  
Thermostat  
Access to all serviceable components is provided at the  
following locations:  
The room thermostat should be located on an inside wall  
approximately 56" above the floor where it will not be subject to  
drafts, sun exposure or heat from electrical fixtures or  
appliances. Follow manufacturer's instructions enclosed with  
the thermostat for general installation procedure. Color coded  
insulated wires (minimum #18 AWG) should be used to connect  
thermostat to unit. See Figures 7 thru 10.  
• Blower compartment access panel  
• Gas control/electrical access panel  
• Refrigerant connections  
Refer to Figure 3 for location of these access locations and  
minimum clearances in Table 5.  
Power And Control Wiring  
Field wiring to the unit must conform to provisions of the current  
N.E.C. ANSI/NFPA No. 70 or C.E.C. and/or local ordinances.  
The unit must be electrically grounded in accordance with local  
codes or, in their absence, with the N.E.C./C.E.C. Voltage  
tolerances which must be maintained at the compressor  
terminals during starting and running conditions are indicated  
on the unit Rating Plate and Table 6.  
This system uses R-410A Refrigerant which operates at  
higher pressures than R-22. No other refrigerant may be  
used in this system. Gage sets, hoses, refrigerant  
containers and recovery systems must be designed to  
handle R-410A. If you are unsure, consult the  
equipment manufacturer. Failure to use R-410A  
compatible servicing equipment may result in property  
damage or injury.  
The wiring entering the cabinet must be provided with  
mechanical strain relief.  
A fused disconnect switch should be field provided for the unit.  
If any of the wire supplied with the unit must be replaced,  
replacement wire must be of the type shown on the wiring  
diagram.  
Electrical line must be sized properly to carry the load. Each  
unit must be wired with a separate branch circuit fed directly  
from the meter panel and properly fused.  
Wear safety glasses and gloves when handling  
refrigerants. Failure to follow this warning can cause  
serious personal injury.  
Refer to Figures 7 thru 11 for typical field wiring and to the  
appropriate unit wiring diagram for control circuit and power  
wiring information.  
Refer to Figure 20 for the R-410A Quick Reference Guide.  
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Figure 7: Typical Field Control Wiring Diagram Single Stage Thermostat - Single Stage Gas Heat  
10  
Unitary Products Group  
       
279550-YIM-A-0207  
NOTE: HEAT ANTICIPATOR  
SHOULD BE SET AT 0.35  
AMPS FOR ALL MODELS.  
SINGLE STAGE  
THERMOSTAT  
UNIT CONTROL BOARD  
TERMINAL STRIP  
** = Minimum wire size of 18 AWG  
wire should be used for all field  
installed 24 volt wire.  
**  
R
G
Y
R
G
JUMPER NEEDED FOR FULL SPEED  
COMPRESSOR OPERATION  
Y1  
24 VOLT  
TRANSFORMER  
Y/Y2  
W
1
2
W
C
W
C
PROGRAMMABLE  
THERMOSTAT ONLY  
Figure 8: Typical Field Control Wiring Diagram Single Stage Thermostat - Two Stage Gas Heat  
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7+(50267$7ꢀ21/<  
Figure 9: Typical Field Control Wiring Diagram Two Stage Thermostat - Single Stage Gas Heat  
Unitary Products Group  
11  
   
279550-YIM-A-0207  
NOTE: HEAT ANTICIPATOR  
SHOULD BE SET AT 0.35  
AMPS FOR ALL MODELS.  
2 STAGE  
THERMOSTAT  
UNIT CONTROL BOARD  
TERMINAL STRIP  
** = Minimum wire size of 18 AWG  
wire should be used for all field  
installed 24 volt wire.  
**  
R
G
R
G
Y
1
2
Y
1
24 VOLT  
TRANSFORMER  
Y
Y/Y2  
W
1
2
W
1
2
W
W
C
C
PROGRAMMABLE  
THERMOSTAT ONLY  
Figure 10: Typical Field Control Wiring Diagram Two Stage Thermostat - Two Stage Gas Heat  
Figure 11: Typical Field Power Wiring Diagram  
Table 6: Electrical Data  
OD Fan Supply  
Max  
Compressors  
(each)  
2
Motors  
(each)  
Blower  
Motor  
Fuse /  
Breaker  
Size  
1
Size  
(Tons)  
MCA  
3
Volt  
(Amps)  
RLA LRA MCC  
FLA  
FLA  
(Amps)  
024  
(2.0)  
208/230-1-60 10.2  
52  
16  
1.4  
4.3  
18.1  
25  
208/230-1-60 16.6  
208/230-3-60 11.1  
82  
58  
29  
96  
88  
41  
26  
17  
7
33  
21  
10  
0.9  
0.9  
0.5  
1.8  
1.8  
0.9  
9.1  
9.1  
4.6  
9.1  
9.1  
4.6  
30.7  
23.8  
10.7  
36.3  
26.7  
13.0  
40  
30  
15  
45  
35  
15  
036  
(3.0)  
460-3-60  
4.5  
208/230-1-60 21.1  
208/230-3-60 13.4  
048  
(4.0)  
460-3-60  
6.4  
1. Minimum Circuit Ampacity.  
2. Maximum Over Current Protection per standard UL 1995.  
3. Fuse or HACR circuit breaker size installed at factory or field installed.  
12  
Unitary Products Group  
     
279550-YIM-A-0207  
DNX024-048 Single Stage Gas Heat  
Models  
DNX036  
Component  
DNX024  
2.0  
DNX048  
4.0  
Nominal Tonnage  
ARI COOLING PERFORMANCE  
Gross Capacity @ ARI A point (Btu)  
ARI net capacity (Btu)  
EER  
3.0  
24.6  
24.0  
11.5  
15.0  
800  
38.4  
37.0  
50.0  
48.0  
11.2  
15.0  
1550  
4.3  
12.3  
SEER  
16.5  
Nominal CFM  
1275  
3.0  
System power (KW)  
Refrigerant type  
Refrigerant charge (lb-oz)  
ARI HEATING PERFORMANCE  
Heating model  
2.1  
R-410A  
7-8  
R-410A  
9-12  
R-410A  
9-8  
36  
56  
70  
65  
90  
108  
87  
65  
80  
90  
108  
87  
110  
135  
108  
80.0  
80  
Heat input (K Btu)  
Heat output (K Btu)  
AFUE %  
45  
36  
80  
64  
56  
64  
80.0  
80  
80.0  
80  
80.0  
80  
80.0  
80  
80.0  
80  
80.0  
80  
Steady state efficiency (%)  
No. burners  
2
3
3
4
3
4
5
No. stages  
1
1
1
1
1
1
1
Temperature Rise Range (ºF)  
Gas Limit Setting (ºF)  
Gas piping connection (in.)  
DIMENSIONS (inches)  
Length  
25-55  
140  
30-60  
160  
25-55  
140  
45-75  
160  
25-55  
150  
35-65  
170  
1/2  
45-75  
160  
1/2  
1/2  
49 1/8  
47 1/4  
33 1/2  
440  
49 1/8  
47 1/4  
41 1/2  
480  
49 1/8  
47 1/4  
41 1/2  
500  
Width  
Height  
OPERATING WT. (lbs.)  
COMPRESSORS  
Type  
Scroll 2-spd  
1
Scroll 2-spd  
1
Scroll 2-spd  
1
Quantity  
CONDENSER COIL DATA  
Face area (Sq. Ft.)  
Rows  
11.7  
14.7  
14.7  
2
20  
2
20  
2
20  
Fins per inch  
Tube diameter (in.)  
Circuitry Type  
3/8  
3/8  
3/8  
Interlaced  
Interlaced  
Interlaced  
EVAPORATOR COIL DATA  
Face area (Sq. Ft.)  
Rows  
3.4  
2
4.4  
3
4.4  
3
Fins per inch  
15  
16  
16  
Tube diameter  
3/8  
3/8  
3/8  
Circuitry Type  
Interlaced  
TXV  
Interlaced  
TXV  
Interlaced  
TXV  
Refrigerant control  
CONDENSER FAN DATA  
Quantity  
1
22  
1
22  
1
22  
Fan diameter (Inch)  
Type  
Prop  
Direct  
1
Prop  
Direct  
2
Prop  
Direct  
1
Drive type  
No. speeds  
Number of motors  
Motor HP each  
RPM  
1
1
2
1/4  
1/3  
1/3  
1100  
2400  
900/1100  
2400  
900/1100  
3000  
Nominal total CFM  
DIRECT DRIVE EVAP FAN DATA  
Quantity  
1
10 x 8  
Centrifugal  
1/2  
1
11 x 10  
Centrifugal  
1
1
11 x 10  
Centrifugal  
1
Fan Size (Inch)  
Type  
Motor HP each  
RPM  
Variable  
48  
Variable  
48  
Variable  
48  
Frame size  
FILTERS  
Quantity - Size  
1 - 20 x 20 x 1  
2 - 20 x 12 x 1  
2 - 20 x 12 x 1  
Unitary Products Group  
13  
279550-YIM-A-0207  
DNX024-048 Two Stage Gas Heat  
Models  
DNX036  
3.0  
Component  
DNX024  
DNX048  
4.0  
Nominal Tonnage  
ARI COOLING PERFORMANCE  
Gross Capacity @ ARI A point (Btu)  
ARI net capacity (Btu)  
EER  
2.0  
24.6  
24.0  
11.5  
15.0  
800  
38.4  
37.0  
50.0  
48.0  
11.2  
15.0  
1550  
4.3  
12.3  
SEER  
16.5  
Nominal CFM  
1275  
3.0  
System power (KW)  
Refrigerant type  
Refrigerant charge (lb-oz)  
ARI HEATING PERFORMANCE  
Heating model  
2.1  
R-410A  
7-8  
R-410A  
9-12  
R-410A  
9-8  
56  
70/45.5  
56/36.4  
80.0  
80  
90  
108/70.2  
87/56.2  
80.0  
80  
90  
110  
Heat input (K Btu)  
Heat output (K Btu)  
AFUE %  
108/70.2 135/87.8  
87/56.2 108/70.2  
80.0  
80  
80.0  
80  
Steady state efficiency (%)  
No. burners  
3
4
4
5
No. stages  
2
2
2
2
Temperature Rise Range (ºF)  
Gas Limit Setting (ºF)  
Gas piping connection (in.)  
DIMENSIONS (inches)  
Length  
30-60  
160  
45-75  
175  
35-65  
170  
45-75  
160  
1/2  
1/2  
1/2  
49 1/8  
47 1/4  
33 1/2  
440  
49 1/8  
47 1/4  
41 1/2  
480  
49 1/8  
47 1/4  
41 1/2  
500  
Width  
Height  
OPERATING WT. (lbs.)  
COMPRESSORS  
Type  
Scroll 2-spd  
1
Scroll 2-spd  
1
Scroll 2-spd  
1
Quantity  
CONDENSER COIL DATA  
Face area (Sq. Ft.)  
Rows  
11.7  
14.7  
14.7  
2
20  
2
20  
2
20  
Fins per inch  
Tube diameter (in.)  
Circuitry Type  
3/8  
3/8  
3/8  
Interlaced  
Interlaced  
Interlaced  
EVAPORATOR COIL DATA  
Face area (Sq. Ft.)  
Rows  
3.4  
2
4.4  
3
4.4  
3
Fins per inch  
15  
16  
16  
Tube diameter  
3/8  
3/8  
3/8  
Circuitry Type  
Interlaced  
TXV  
Interlaced  
TXV  
Interlaced  
TXV  
Refrigerant control  
CONDENSER FAN DATA  
Quantity  
1
22  
1
22  
1
22  
Fan diameter (Inch)  
Type  
Prop  
Direct  
1
Prop  
Direct  
2
Prop  
Direct  
1
Drive type  
No. speeds  
Number of motors  
Motor HP each  
RPM  
1
1
2
1/4  
1/3  
1/3  
1100  
2400  
900/1100  
2400  
900/1100  
3000  
Nominal total CFM  
DIRECT DRIVE EVAP FAN DATA  
Quantity  
1
10 x 8  
Centrifugal  
1/2  
1
11 x 10  
Centrifugal  
1
1
11 x 10  
Centrifugal  
1
Fan Size (Inch)  
Type  
Motor HP each  
RPM  
Variable  
48  
Variable  
48  
Variable  
48  
Frame size  
FILTERS  
Quantity - Size  
1 - 20 x 20 x 1  
2 - 20 x 12 x 1  
2 - 20 x 12 x 1  
14  
Unitary Products Group  
279550-YIM-A-0207  
Compressors  
The scroll compressor used in this product is specifically  
designed to operate with R-410A Refrigerant and cannot be  
interchanged.  
Scroll compressors require proper rotation to operate  
properly. Failure to check and correct rotation may result  
in property damage.  
Gas Heat  
This system uses R-410A Refrigerant which operates at  
higher pressures than R-22. No other refrigerant may be  
used in this system.  
These single or two stage gas-fired heaters have aluminized-  
steel tubular heat exchangers with spark to pilot ignition.  
Gas Piping  
The compressor also uses a polyolester (POE oil), Mobil 3MA  
POE. This oil is extremely hydroscopic, meaning it absorbs  
water readily. POE oil can absorb 15 times as much water as  
other oils designed for HCFC and CFC refrigerants. Take all  
necessary precautions to avoid exposure of the oil to the  
atmosphere.  
Proper sizing of gas piping depends on the cubic feet per hour  
of gas flow required, specific gravity of the gas and the length of  
run. National Fuel Gas Code Z223.1 or CSA B149.1 should be  
followed in all cases unless superseded by local codes or gas  
company requirements. Refer to Tables 7 and 8.  
The heating value of the gas may differ with locality. The value  
should be checked with the local gas utility.  
NOTE: There may be a local gas utility requirement specifying  
a minimum diameter for gas piping. All units require a  
1/2 inch pipe connection at the gas valve.  
Do not leave the system open to the atmosphere. Unit  
damage could occur due to moisture being absorbed by  
the POE oil in the system. This type of oil is highly  
susceptible to moisture absorption  
Gas Connection  
The gas supply line can be routed through the hole located on  
the left side of the unit. Refer to Figure 3 to locate these access  
openings. Typical supply piping arrangements are shown in  
Figure 12.  
POE (polyolester) compressor lubricants are known to cause  
long term damage to some synthetic roofing materials.  
Gas piping requirements:  
1. A drip leg and a ground joint union must be installed in the  
gas piping.  
Exposure, even if immediately cleaned up, may cause  
embrittlement (leading to cracking) to occur in one year  
or more. When performing any service that may risk  
exposure of compressor oil to the roof, take precautions  
to protect roofing.  
2. When required by local codes, a manual shut-off valve may  
have to be installed outside of the unit.  
3. Use wrought iron or steel pipe for all gas lines. Pipe dope  
should be applied sparingly to male threads only.  
Procedures which risk oil leakage include, but are not limited to,  
compressor replacement, repairing refrigerant leaks, replacing  
refrigerant components such as filter drier, pressure switch,  
metering device or coil.  
$8720$7,&ꢀ*$6ꢀ9$/9(  
ꢄꢅꢋꢀ[ꢀꢄꢅꢋꢀ81,21  
Units are shipped with compressor mountings which are  
factory-adjusted and ready for operation.  
ꢄꢅꢋꢀ[ꢀꢄꢅꢋꢀ*$6ꢀ&2&.  
Do not loosen compressor mounting bolts.  
Phasing  
Three-phase, scroll compressors operate in only one direction.  
If the scroll is drawing low amperage, has similar suction and  
discharge pressures, or is producing a high noise level, the  
scroll is misphased. Change the incoming line connection  
phasing to obtain the proper rotation.  
ꢄꢅꢋꢀꢃꢀꢄꢁ137  
'5,3ꢀ/(*  
Figure 12: External Supply Connection External Shut-Off  
Unitary Products Group  
15  
       
279550-YIM-A-0207  
1
Limitations, shown on Page 3. After the gas connections  
have been completed, open the main shut-off valve  
admitting normal gas pressure to the mains. Check all  
joints for leaks with soap solution or other material suitable  
for the purpose. NEVER USE A FLAME.  
Table 7: Natural Gas Pipe Sizing Chart  
Nominal Inches Iron Pipe Size  
Length  
In Feet  
10  
20  
30  
40  
50  
60  
70  
1/2”  
132  
92  
73  
63  
56  
50  
46  
3/4”  
278  
190  
152  
130  
115  
105  
96  
1”  
1-1/4”  
1,050  
730  
590  
500  
440  
400  
370  
350  
520  
350  
285  
245  
215  
195  
180  
170  
160  
150  
FIRE OR EXPLOSION HAZARD  
Failure to follow the safety warning exactly could result  
in serious injury, death or property damage.  
80  
43  
90  
90  
40  
84  
320  
305  
100  
38  
79  
Never test for gas leaks with an open flame. use a  
commercially available soap solution made specifically  
for the detection of leaks to check all connections. A fire  
or explosion may result causing property damage,  
personal injury or loss of life.  
1. Maximum capacity of pipe in cubic feet of gas per hour  
(based upon a pressure drop of 0.3 inch water column and  
0.6 specific gravity gas).  
1
Table 8: Propane (LP) Gas Pipe Sizing Chart  
6. The furnace must be isolated from the gas supply piping  
system by closing its individual manual shut-off valve  
before conducting any pressure testing of the gas supply  
piping system at test pressures equal to or less than 1/2  
psig (3.48 kPa).  
Nominal Inches Iron Pipe Size  
Length  
In Feet  
10  
20  
30  
40  
50  
60  
70  
1/2”  
275  
189  
152  
129  
114  
103  
96  
3/4”  
567  
393  
315  
267  
237  
217  
196  
185  
173  
162  
1”  
1,071  
732  
590  
504  
448  
409  
378  
346  
322  
307  
1-1/4”  
2,205  
1,496  
1,212  
1,039  
913  
834  
771  
724  
677  
Flue Vent Hood  
The flue vent hood with screen is shipped loose. This hood must  
be installed to assure proper unit operation. The hood must be  
fastened to the outside of the side gas control/electrical  
compartment with the screws provided in the bag attached to the  
inside of the gas control/electrical compartment, see Figure 13.  
80  
90  
100  
89  
83  
78  
630  
1. Maximum capacity of pipe in thousands of BTU per hour  
(based upon a pressure drop of 0.5 inch water column).  
Flue hood surfaces may be hot.  
9(17ꢀ287/(7ꢀ6&5((1  
If flexible stainless steel tubing is allowed by the  
authority having jurisdiction, wrought iron or steel pipe  
must be installed at the gas valve and extend a  
minimum of two (2) inches outside of the unit casing.  
)/8(ꢀ9(17ꢀ287/(7ꢀ  
$,5ꢀꢀ+22'  
Natural gas may contain some propane. Propane being  
an excellent solvent, will quickly dissolve white lead or  
most standard commercial compounds. Therefore, a  
special pipe dope must be applied when wrought iron or  
steel pipe is used. Shellac base compounds such as  
gaskoloc or stalastic, and compounds such as  
Figure 13: Flue Vent Outlet Air Hood  
rectorseal # 5, Clyde’s or John Crane may be used.  
The flue exhaust hood must be properly installed and  
within the recommended clearances. Further commu-  
nications and action must be given to the home or  
building owner(s) to eliminate any unauthorized human  
contact around this area during the heating cycle. Flue  
hood surface and the immediate area reach high tem-  
peratures during the heating cycle.  
4. All piping should be cleaned of dirt and scale by  
hammering on the outside of the pipe and blowing out the  
loose dirt and scale. Before initial start-up, be sure that all  
of the gas lines external to the unit have been purged of air.  
5. The gas supply should be a separate line and installed in  
accordance with all safety codes as prescribed under  
16  
Unitary Products Group  
         
279550-YIM-A-0207  
Table 9: Natural Gas Application Data-Single Stage  
Temp. Rise ºF  
At Full Input3  
Input  
Available On Models  
(MBH)1  
Output  
(MBH)  
Gas Rate2  
Ft.3/Hr.  
Number of  
Burners  
Min.  
25  
Max.  
55  
2 Ton  
2 Ton  
3,4 Ton  
3 Ton  
4 Ton  
4 Ton  
45  
70  
80  
108  
108  
135  
36  
56  
64  
87  
87  
42  
65  
74  
100  
100  
126  
2
3
3
4
4
5
30  
60  
25  
55  
45  
75  
35  
65  
108  
45  
75  
1. Heating capacity valid for elevations up to 2000 feet above sea level. For elevations above 2,000 feet, rated capacity should be reduced by  
4% for each 1,000 feet above sea level.  
2. Based on 1075 BTU/Ft.3.  
3. The air flow must be adequate to obtain a temperature rise within the range shown. Continuous return air temperature should not be below 55°F.  
Table 10: Natural Gas Application Data-Two Stage  
Input  
Output  
(MBH)  
Gas Rate2  
Ft.3/Hr.  
Temp. Rise ºF  
At Full Input3  
Number of  
Burners  
Available On Models  
(MBH)1  
High Fire/Low Fire High Fire/Low Fire High Fire/Low Fire  
Min.  
30  
Max.  
60  
2 Ton  
3 Ton  
4 Ton  
4 Ton  
70 / 45.5  
108 / 70.2  
108 / 70.2  
135 / 87.75  
56 / 36.4  
87 / 56.2  
87 / 56.2  
108 / 70.2  
65 / 42  
100 / 65  
100 / 65  
126 / 82  
3
4
4
5
45  
75  
35  
65  
45  
75  
1. Heating capacity valid for elevations up to 2000 feet above sea level. For elevations above 2,000 feet, rated capacity should be reduced by  
4% for each 1,000 feet above sea level.  
2. Based on 1075 BTU/Ft.3.  
3. The air flow must be adequate to obtain a temperature rise within the range shown. Continuous return air temperature should not be below 55°F.  
1
Table 11: Propane (LP) Gas Application Data-Single Stage  
Temp. Rise ºF  
Input Capacity  
(Mbh)2  
Output Capacity  
(Mbh)  
Gas Rate3  
Ft.3/Hr.  
Available On Models  
Number of Burners  
At Full Input4  
Min.  
25  
Max.  
55  
2 Ton  
2 Ton  
3,4 Ton  
3 Ton  
4 Ton  
4 Ton  
45  
70  
80  
108  
108  
135  
36  
56  
64  
87  
87  
18  
28  
32  
43  
43  
54  
2
3
3
4
4
5
30  
60  
25  
55  
45  
75  
35  
65  
108  
45  
75  
1. Propane applications are accomplished by field installation of a Propane Conversion Accessory, Model 1NP0807 for 2 Ton unit with 33-1/2”  
tall cabinet and Model 1NP0808 for 3 and 4 Ton units with 41-1/2” tall cabinets.  
2. Heating capacity valid for elevations up to 2,000 feet above sea level. For elevations above 2,000 feet, rated capacity should be reduced  
by 4% for each 1,000 feet above sea level.  
3. Based on 2500 BTU/Ft.3.  
4. The air flow must be adequate to obtain a temperature rise within the range shown. Continuous return air temperature should not be below 55°F.  
1
Table 12: Propane (LP) Gas Application Data-Two Stage  
Input Capacity  
(Mbh)2  
Output Capacity  
(Mbh)  
Gas Rate3  
Ft.3/Hr.  
Temp. Rise ºF  
At Full Input4  
Available On Models  
Number of Burners  
High Fire/Low Fire High Fire/Low Fire High Fire/Low Fire  
Min.  
30  
45  
35  
45  
Max.  
60  
75  
65  
75  
2 Ton  
3 Ton  
4 Ton  
4 Ton  
70 / 45.5  
108 / 70.2  
108 / 70.2  
135 / 87.75  
56 / 36.4  
87 / 56.2  
87 / 56.2  
108 / 70.2  
28 / 18.2  
43 / 27.95  
43 / 27.95  
54 / 35.1  
3
4
4
5
1. Propane applications are accomplished by field installation of a Propane Conversion Accessory, Model 1NP0809 for 2 Ton unit with 33-1/2”  
tall cabinet and Model 1NP0810 for 3 and 4 Ton units with 41-1/2” tall cabinets.  
2. Heating capacity valid for elevations up to 2,000 feet above sea level. For elevations above 2,000 feet, rated capacity should be reduced  
by 4% for each 1,000 feet above sea level.  
3. Based on 2500 BTU/Ft.3.  
4. The air flow must be adequate to obtain a temperature rise within the range shown. Continuous return air temperature should not be below 55°F.  
Unitary Products Group  
17  
       
279550-YIM-A-0207  
Airflow Performance  
Table 13: Side Duct Application  
External Static Pressure (Inch Water Gauge)  
0.3 0.4 0.5 0.6 0.7 0.8 0.9  
Watts Watts Watts Watts Watts Watts Watts Watts Watts  
Size  
(Tons)  
Thermostat  
Input  
Speed  
Tap  
Mode  
CFM  
0.2  
1.0  
Y1  
Y1  
COOL-A  
COOL-B  
COOL-C  
COOL-D  
COOL-A  
COOL-B  
COOL-C  
COOL-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
COOL-A  
COOL-B  
COOL-C  
COOL-D  
COOL-A  
COOL-B  
COOL-C  
COOL-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
COOL-A  
COOL-B  
COOL-C  
COOL-D  
COOL-A  
COOL-B  
COOL-C  
COOL-D  
600  
450  
100  
65  
122  
81  
145  
100  
121  
176  
232  
145  
184  
288  
172  
198  
227  
259  
312  
334  
351  
386  
172  
180  
189  
207  
312  
331  
351  
386  
272  
222  
245  
302  
454  
340  
394  
522  
423  
487  
558  
635  
394  
439  
471  
522  
216  
230  
243  
260  
394  
436  
474  
522  
323  
282  
343  
375  
696  
561  
745  
851  
169  
122  
145  
202  
261  
169  
211  
319  
197  
225  
255  
289  
344  
368  
385  
422  
197  
206  
215  
235  
344  
364  
385  
422  
313  
262  
286  
344  
501  
384  
439  
570  
469  
535  
607  
686  
439  
485  
518  
570  
255  
270  
284  
301  
439  
482  
521  
570  
367  
326  
386  
419  
752  
611  
804  
916  
194  
147  
170  
228  
290  
194  
238  
351  
224  
252  
284  
319  
378  
403  
422  
461  
224  
233  
242  
262  
378  
400  
422  
461  
358  
310  
332  
388  
548  
428  
484  
620  
515  
583  
659  
743  
484  
531  
565  
620  
304  
317  
330  
347  
484  
528  
568  
620  
411  
369  
430  
463  
810  
663  
864  
982  
221  
176  
197  
256  
320  
221  
265  
385  
251  
280  
314  
351  
-
249  
279  
310  
208  
243  
281  
Low  
Y1  
530  
81  
100  
151  
204  
122  
159  
258  
147  
172  
199  
230  
281  
303  
319  
353  
147  
155  
163  
181  
281  
300  
319  
353  
233  
190  
210  
260  
408  
296  
348  
475  
377  
440  
511  
590  
348  
392  
424  
475  
185  
196  
208  
223  
348  
389  
427  
475  
280  
237  
300  
332  
640  
513  
687  
787  
226  
258  
291  
Y1  
680  
127  
177  
100  
134  
229  
123  
146  
173  
202  
253  
274  
290  
324  
123  
130  
138  
155  
253  
271  
290  
324  
198  
166  
180  
221  
361  
253  
302  
429  
330  
394  
467  
550  
302  
345  
377  
429  
163  
170  
178  
189  
302  
342  
380  
429  
237  
192  
257  
289  
586  
466  
630  
723  
284  
313  
342  
Cool  
Heat  
Cool  
Heat  
Cool  
Y1+Y2  
Y1+Y2  
Y1+Y2  
Y1+Y2  
W1  
800  
350  
382  
414  
600  
249  
279  
310  
High  
N036  
N056  
700  
293  
323  
352  
900  
420  
457  
494  
670  
-
-
-
W1  
730  
-
-
-
W1  
790  
-
-
-
W1  
850  
-
-
-
024  
(2.0)  
W1  
940  
-
-
-
W1  
975  
-
-
-
-
W1  
1000  
1050  
670  
-
-
-
-
W1  
-
-
-
-
W1  
-
-
-
-
W1  
690  
-
-
-
-
W1  
710  
-
-
-
-
W1  
750  
-
-
-
-
D056  
W1+W2  
W1+W2  
W1+W2  
W1+W2  
Y1  
940  
-
-
-
-
970  
-
-
-
-
1000  
1050  
900  
-
-
-
-
-
-
-
-
406  
366  
384  
434  
594  
472  
528  
671  
560  
631  
713  
804  
528  
577  
612  
671  
362  
372  
382  
396  
528  
573  
616  
671  
455  
413  
475  
509  
869  
715  
926  
458  
512  
569  
Y1  
760  
431  
503  
584  
Low  
High  
N065  
N090  
Y1  
830  
441  
503  
571  
Y1  
970  
481  
530  
579  
Y1+Y2  
Y1+Y2  
Y1+Y2  
Y1+Y2  
W1  
1250  
1050  
1150  
1350  
1200  
1300  
1400  
1500  
1150  
1225  
1275  
1350  
740  
640  
687  
733  
516  
561  
605  
571  
615  
657  
723  
777  
831  
-
-
-
W1  
-
-
-
W1  
-
-
-
W1  
-
-
-
036  
(3.0)  
W1  
-
-
-
W1  
-
-
-
W1  
-
-
-
W1  
-
-
-
W1  
-
-
-
-
W1  
785  
-
-
-
W1  
825  
-
-
-
W1  
870  
-
-
D090  
W1+W2  
W1+W2  
W1+W2  
W1+W2  
Y1  
1150  
1220  
1280  
1350  
1030  
930  
-
-
-
-
-
-
-
-
-
-
-
-
499  
455  
520  
555  
929  
770  
988  
543  
497  
565  
602  
991  
826  
588  
539  
611  
649  
1053  
882  
Y1  
Low  
Y1  
1070  
1130  
1550  
1400  
1600  
1700  
Y1  
048  
(4.0)  
Y1+Y2  
Y1+Y2  
Y1+Y2  
Y1+Y2  
High  
1052 1116  
1049 1116 1185  
-
18  
Unitary Products Group  
   
279550-YIM-A-0207  
Table 13: Side Duct Application (Continued)  
External Static Pressure (Inch Water Gauge)  
0.3 0.4 0.5 0.6 0.7 0.8 0.9  
Watts Watts Watts Watts Watts Watts Watts Watts Watts  
Size  
(Tons)  
Thermostat  
Input  
Speed  
Tap  
Mode  
CFM  
0.2  
1.0  
W1  
W1  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
1200  
1300  
1400  
1500  
1325  
1400  
1500  
1600  
870  
330  
394  
466  
544  
412  
466  
544  
630  
168  
188  
216  
247  
415  
466  
544  
630  
504  
544  
630  
723  
196  
209  
247  
273  
504  
544  
630  
723  
373  
439  
513  
596  
456  
513  
596  
687  
215  
233  
260  
290  
460  
513  
596  
687  
553  
596  
687  
787  
241  
253  
290  
315  
553  
596  
687  
787  
416  
484  
561  
648  
503  
561  
648  
745  
261  
278  
303  
333  
506  
561  
648  
745  
604  
648  
745  
851  
285  
297  
333  
358  
604  
648  
745  
851  
461  
531  
611  
702  
550  
611  
702  
804  
306  
322  
347  
376  
554  
611  
702  
804  
656  
702  
804  
916  
329  
341  
376  
402  
656  
702  
804  
916  
507  
579  
663  
758  
599  
663  
758  
864  
350  
366  
391  
420  
603  
663  
758  
864  
-
554  
629  
715  
815  
649  
715  
815  
926  
393  
409  
434  
464  
653  
715  
815  
926  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
N065  
W1  
W1  
W1  
W1  
N090  
D090  
N110  
D110  
W1  
W1  
W1  
W1  
920  
W1  
985  
W1  
1050  
1330  
1400  
1500  
1600  
1450  
1500  
1600  
1700  
940  
W1+W2  
W1+W2  
W1+W2  
W1+W2  
W1  
048  
(4.0)  
Heat  
W1  
-
-
W1  
-
-
W1  
-
-
W1  
-
-
W1  
970  
-
-
W1  
1050  
1100  
1450  
1500  
1600  
1700  
-
-
W1  
-
-
W1+W2  
W1+W2  
W1+W2  
W1+W2  
-
-
-
-
-
-
-
-
Table 14: Bottom Duct Application  
External Static Pressure (Inch Water Gauge)  
0.3 0.4 0.5 0.6 0.7 0.8 0.9  
Size  
(Tons)  
Thermostat  
Input  
Speed  
Tap  
Mode  
CFM  
0.2  
1.0  
Watts Watts Watts Watts Watts Watts Watts Watts Watts  
Y1  
Y1  
COOL-A  
COOL-B  
COOL-C  
COOL-D  
COOL-A  
COOL-B  
COOL-C  
COOL-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
600  
450  
530  
680  
800  
600  
700  
900  
670  
730  
790  
850  
940  
975  
1000  
1050  
670  
690  
710  
750  
940  
970  
1000  
1050  
100  
65  
122  
81  
145  
100  
121  
176  
232  
145  
184  
288  
172  
198  
227  
259  
312  
334  
351  
386  
172  
180  
189  
207  
312  
331  
351  
386  
169  
122  
145  
202  
261  
169  
211  
319  
197  
225  
255  
289  
344  
368  
385  
422  
197  
206  
215  
235  
344  
364  
385  
422  
194  
147  
170  
228  
290  
194  
238  
351  
224  
252  
284  
319  
378  
403  
422  
461  
224  
233  
242  
262  
378  
400  
422  
461  
221  
249  
279  
310  
176  
208  
243  
281  
Low  
Y1  
81  
100  
151  
204  
122  
159  
258  
147  
172  
199  
230  
281  
303  
319  
353  
147  
155  
163  
181  
281  
300  
319  
353  
197  
226  
258  
291  
Y1  
127  
177  
100  
134  
229  
123  
146  
173  
202  
253  
274  
290  
324  
123  
130  
138  
155  
253  
271  
290  
324  
256  
284  
313  
342  
Cool  
Y1+Y2  
Y1+Y2  
Y1+Y2  
Y1+Y2  
W1  
320  
350  
382  
414  
221  
249  
279  
310  
High  
N036  
N056  
265  
293  
323  
352  
385  
420  
457  
494  
251  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
W1  
280  
W1  
314  
W1  
351  
024  
(2.0)  
W1  
-
-
-
-
-
-
-
-
-
-
-
-
W1  
W1  
W1  
Heat  
W1  
W1  
W1  
W1  
D056  
W1+W2  
W1+W2  
W1+W2  
W1+W2  
Unitary Products Group  
19  
 
279550-YIM-A-0207  
Table 14: Bottom Duct Application (Continued)  
External Static Pressure (Inch Water Gauge)  
0.3 0.4 0.5 0.6 0.7 0.8 0.9  
Watts Watts Watts Watts Watts Watts Watts Watts Watts  
Size  
(Tons)  
Thermostat  
Input  
Speed  
Tap  
Mode  
CFM  
0.2  
1.0  
Y1  
Y1  
COOL-A  
COOL-B  
COOL-C  
COOL-D  
COOL-A  
COOL-B  
COOL-C  
COOL-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
COOL-A  
COOL-B  
COOL-C  
COOL-D  
COOL-A  
COOL-B  
COOL-C  
COOL-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
HEAT-A  
HEAT-B  
HEAT-C  
HEAT-D  
900  
760  
198  
166  
180  
221  
361  
253  
302  
429  
330  
394  
467  
550  
302  
345  
377  
429  
163  
170  
178  
189  
302  
342  
380  
429  
237  
192  
257  
289  
586  
466  
630  
723  
330  
394  
466  
544  
412  
466  
544  
630  
168  
188  
216  
247  
415  
466  
544  
630  
504  
544  
630  
723  
196  
209  
247  
273  
504  
544  
630  
723  
233  
190  
210  
260  
408  
296  
348  
475  
377  
440  
511  
590  
348  
392  
424  
475  
185  
196  
208  
223  
348  
389  
427  
475  
280  
237  
300  
332  
640  
513  
687  
787  
373  
439  
513  
596  
456  
513  
596  
687  
215  
233  
260  
290  
460  
513  
596  
687  
553  
596  
687  
787  
241  
253  
290  
315  
553  
596  
687  
787  
272  
222  
245  
302  
454  
340  
394  
522  
423  
487  
558  
635  
394  
439  
471  
522  
216  
230  
243  
260  
394  
436  
474  
522  
323  
282  
343  
375  
696  
561  
745  
851  
416  
484  
561  
648  
503  
561  
648  
745  
261  
278  
303  
333  
506  
561  
648  
745  
604  
648  
745  
851  
285  
297  
333  
358  
604  
648  
745  
851  
313  
262  
286  
344  
501  
384  
439  
570  
469  
535  
607  
686  
439  
485  
518  
570  
255  
270  
284  
301  
439  
482  
521  
570  
367  
326  
386  
419  
752  
611  
804  
916  
461  
531  
611  
702  
550  
611  
702  
804  
306  
322  
347  
376  
554  
611  
702  
804  
656  
702  
804  
916  
329  
341  
376  
402  
656  
702  
804  
916  
358  
310  
332  
388  
548  
428  
484  
620  
515  
583  
659  
743  
484  
531  
565  
620  
304  
317  
330  
347  
484  
528  
568  
620  
411  
369  
430  
463  
810  
663  
864  
982  
507  
579  
663  
758  
599  
663  
758  
864  
350  
366  
391  
420  
603  
663  
758  
864  
-
406  
366  
384  
434  
594  
472  
528  
671  
560  
631  
713  
804  
528  
577  
612  
671  
362  
372  
382  
396  
528  
573  
616  
671  
455  
413  
475  
509  
869  
715  
926  
458  
512  
569  
431  
503  
584  
Low  
Y1  
830  
441  
503  
571  
Y1  
970  
481  
530  
579  
Cool  
Heat  
Cool  
Y1+Y2  
Y1+Y2  
Y1+Y2  
Y1+Y2  
W1  
1250  
1050  
1150  
1350  
1200  
1300  
1400  
1500  
1150  
1225  
1275  
1350  
740  
640  
687  
733  
516  
561  
605  
High  
N065  
N090  
571  
615  
657  
723  
777  
831  
-
-
-
W1  
-
-
-
W1  
-
-
-
W1  
-
-
-
036  
(3.0)  
W1  
-
-
-
W1  
-
-
-
W1  
-
-
-
W1  
-
-
-
W1  
-
-
-
-
W1  
785  
-
-
-
W1  
825  
-
-
-
W1  
870  
-
-
D090  
W1+W2  
W1+W2  
W1+W2  
W1+W2  
Y1  
1150  
1220  
1280  
1350  
1030  
930  
-
-
-
-
-
-
-
-
-
-
-
-
499  
455  
520  
555  
929  
770  
988  
543  
497  
565  
602  
991  
826  
588  
539  
611  
649  
1053  
882  
Y1  
Low  
High  
N065  
N090  
Y1  
1070  
1130  
1550  
1400  
1600  
1700  
1200  
1300  
1400  
1500  
1325  
1400  
1500  
1600  
870  
Y1  
Y1+Y2  
Y1+Y2  
Y1+Y2  
Y1+Y2  
W1  
1052 1116  
1049 1116 1185  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
554  
629  
715  
815  
649  
715  
815  
926  
393  
409  
434  
464  
653  
715  
815  
926  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
W1  
W1  
W1  
W1  
W1  
W1  
W1  
W1  
W1  
920  
048  
(4.0)  
W1  
985  
W1  
1050  
1330  
1400  
1500  
1600  
1450  
1500  
1600  
1700  
940  
D090  
N110  
D110  
W1+W2  
W1+W2  
W1+W2  
W1+W2  
W1  
Heat  
W1  
-
-
W1  
-
-
W1  
-
-
W1  
-
-
W1  
970  
-
-
W1  
1050  
1100  
1450  
1500  
1600  
1700  
-
-
W1  
-
-
W1+W2  
W1+W2  
W1+W2  
W1+W2  
-
-
-
-
-
-
-
-
20  
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279550-YIM-A-0207  
Table 15: Additional Static Resistance  
Size  
(Tons)  
1
CFM  
Wet Indoor Coil  
Economizer  
Filter/Frame Kit  
Electric Heat  
500  
600  
0.01  
0.01  
0.01  
0.02  
0.03  
0.04  
0.05  
0.06  
0.01  
0.02  
0.03  
0.04  
0.05  
0.06  
0.07  
0.08  
0.02  
0.03  
0.04  
0.05  
0.06  
0.07  
0.07  
0.08  
0.09  
0.09  
0.00  
0.00  
0.00  
0.01  
0.01  
0.01  
0.01  
0.02  
0.00  
0.01  
0.01  
0.01  
0.01  
0.02  
0.03  
0.04  
0.02  
0.02  
0.02  
0.03  
0.04  
0.04  
0.04  
0.04  
0.05  
0.05  
0.01  
0.02  
0.04  
0.06  
0.08  
0.10  
0.13  
0.16  
0.04  
0.06  
0.08  
0.10  
0.13  
0.16  
0.17  
0.18  
0.04  
0.04  
0.05  
0.05  
0.06  
0.07  
0.08  
0.09  
0.10  
0.11  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
700  
800  
024  
(2.0)  
900  
1000  
1100  
1200  
700  
800  
900  
1000  
1100  
1200  
1300  
1400  
1100  
1200  
1300  
1400  
1500  
1600  
1700  
1800  
1900  
2000  
036  
(3.0)  
048  
(4.0)  
1. The pressure drop through the economizer is greater for 100% outdoor air than for 100% return air. If the resistance  
of the return air duct is less than 0.25 IWG, the unit will deliver less CFM during full economizer operation.  
To Set Cooling CFM for DNX Units:  
Table 16: Indoor Blower Specifications  
Refer to Airflow Performance Tables 13 and 14 for the possible  
cooling speed CFM selections.  
Motor  
Eff.  
Size  
(Tons)  
024  
(2.0)  
036  
(3.0)  
048  
(4.0)  
HP  
RPM  
SF  
Frame  
Set “COOL” and “ADJ” Jumpers on the CFM selection board as  
indicated in Tables 13, 14 and Figure 14.  
1/2  
Variable  
0.8  
0.8  
0.8  
1.0  
48  
1
1
Variable  
Variable  
1.0  
1.0  
48  
48  
NOTE: CFM indicator light flashes once for every 100 CFM  
(i.e. 12 flashes = 1200 CFM).  
Blower Speed Selection  
The variable speed blowers are designed to deliver constant  
CFM regardless of the external static pressure (ESP) in the  
ductwork. Therefore, if too many supply registers are closed, a  
filter becomes clogged, or there is a restriction in the ductwork,  
the motor will automatically operate at a higher speed to  
compensate for the higher ESP. This may result in a higher  
operating sound level.  
Do not change the "ADJ" tab position on the CFM  
selection board as this will change your cooling CFM  
previously selected.  
To Set Delay Profile:  
Every unit has multiple cooling “blower off delay” profiles to  
optimize system performance and efficiency. Refer to Table 17  
for the regional climate in your area. Place the “DELAY” jumper  
tap on the CFM selection board on the appropriate pin setting.  
These units have variable speed motors that automatically  
adjust to provide constant CFM from 0.2" to 0.6" w.c. static  
pressure. From 0.6" to 1.0" static pressure, CFM is reduced by  
2% per 0.1" increase in static. Operation on duct systems with  
greater than 1.0" w.c. external static pressure is not  
recommended.  
Factory Set Gas Heat CFM:  
The blower speed required for gas heat is different than for  
cooling. The heating CFM is factory set, but is adjustable.  
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279550-YIM-A-0207  
The “Heat” Jumper on the CFM selection board should be  
set to “A”.  
to close. When the low pressure switch closes, the control  
begins Pre-purge period. If the call for heat is lost, the control  
de-energizes the inducer without post-purge and returns to  
standby.  
Fan Only CFM:  
When the connection is made from “R” to “G”, the fan only  
mode is activated. In this mode, the blower will deliver 75% of  
the cooling system CFM. This connection is factory set from the  
manufacturer, but can be field adjusted.  
If the low pressure switch does not close within 10 seconds of  
inducer energizing, the control board flashes “2” on the LED. If  
the pressure switch does not close within 5 minutes of inducer  
energizing, the control shuts off the inducer for 30 seconds,  
then energizes the inducer for another 5 minute try to close the  
pressure switch. This cycle continues indefinitely until either the  
pressure switch is proved closed, or the call for heat ends.  
:ꢀ  
:ꢁ  
Pre-purge  
The control board monitors the low pressure switch and  
ensures it remains closed during pre-purge. If the pressure  
switch opens, the control goes back to pressure switch proving  
mode. The control waits for a 15 second pre-purge period, then  
begins the ignition trial  
5
<ꢂ<ꢀ  
<ꢁ  
Ignition Trial Period  
The control board energizes the pilot gas valve and spark  
outputs for an 85 second Ignition trial. The control de-energizes  
the spark when flame is sensed and enters a flame stabilization  
period.  
Figure 14: Control Board Speed Tap Location  
Table 17: Delay Profile  
If flame is not established within the ignition trial period, the  
control de-energizes the spark and gas valve and begins an  
inter-purge period before attempting another ignition trial.  
Delay Tap  
Jumper at “A”  
Jumper at “B”  
Jumper at “C”  
Jumper at “D”  
Regional Climate Type  
Standard Setting  
Humid Climate  
If the call for heat is lost during an ignition trial period, the  
control immediately de-energizes spark and gas. The control  
runs the inducer motor through a post purge period before de-  
energizing.  
Dry Climate  
Temperate Climate  
If the pressure switch is lost during an ignition trial period, the  
control immediately de-energizes spark and gas. The control  
begins pressure switch proving before an inter-purge and re-  
ignition attempt.  
Operation  
The unit is controlled by a conventional heating/cooling thermostat  
common to this class of equipment.  
Pilot Flame Stabilization Period  
Heating Sequence Of Operation  
Heat  
The control board de-energizes the spark output, and waits for  
a 2 second flame stabilization period before energizing the  
main gas valve.  
The control board begins a call for heat when W1 is energized  
(connected to R). The control ignores W2 until pilot ignition has  
been established.  
If flame is lost during the flame stabilization period, the control  
board counts it as a flame loss and retries ignition or locks out  
flashing a “5” on the LED.  
The control checks to see if the pressure switch is open. If the  
pressure switch is closed, the control board flashes “3” on the  
LED and waits indefinitely for it to open. When the pressure  
switch is sensed as open, the control begins pressure switch  
proving period. If the call for heat is lost, the control goes back  
to Standby.  
Heat Blower On Delay  
The control board waits for 30 seconds and then energizes the  
indoor blower heat speed. Blower on delay time begins at the  
start of flame proving period in the trial for ignition.  
If the thermostat demand for heat is removed, the control de-  
energizes the gas valve, energizes the blower on heat speed  
and initiates a post-purge and heat blower off delay.  
Pressure Switch Proving  
The control board energizes the induced draft motor (High  
speed for 2 stage model) and waits for the low pressure switch  
22  
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279550-YIM-A-0207  
Main Burner Operation  
Heat Blower Off Delay  
The control board de-energizes the indoor blower motor after a  
delay time as selected by movable shunt (60, 90, 120 or 180  
seconds). Blower timing begins when the thermostat is satisfied  
or heat cycle was interrupted. The control returns to standby  
when the blower off delay is complete.  
High Heat Warm-up  
Two stage models run high heat for the first 60 seconds  
following Pilot Flame Stabilization period regardless of W2  
demand. If W2 is not energized at the end of this 60 second  
period the control de energizes the high gas output and steps  
the inducer to low speed. If W2 is energized the control remains  
on high heat.  
If the thermostat call for heat returns before the blower off delay  
is complete, the control begins an ignition sequence with pre-  
purge while the blower off delay continues.  
There is no high heat warm-up on single stage models.  
Low Heat  
Lockout  
While in lockout, the control board keeps the pilot gas valve,  
main gas valve and induced draft motor de-energized.  
The control board keeps the pilot gas valve, main gas valve and  
induced draft motor energized while continuously monitoring  
the call for heat, low pressure switch, and flame status.  
Lockouts due to failed ignition or flame losses may be reset by  
removing the call for heat (W1) for more than 1 second, but less  
than 20 seconds, or by removing power from the control for  
over 0.25 seconds. The control will automatically reset lockout  
after 60 minutes.  
If the call for heat (W1) is lost, the control de-energizes the gas  
valve and begins post purge.  
If low pressure switch opens, the control de-energizes the gas  
valve and begins pressure switch proving mode.  
Lockouts due to detected internal control faults will reset after  
60 minutes or power interruption.  
If flame is lost, the control de-energizes the gas valve within 2.0  
second and counts the flame loss. If flame has been lost more  
than 16 times within the same call for heat, the control board  
locks out flashing “5” on the LED. If flame has been lost less  
than 16 times, the control attempts re-ignition after a 300  
second inter-purge period.  
High Temperature Limit Switch  
Any time the high temperature limit switch is open the control  
board will run the indoor blower motor on heat speed, the  
inducer (on high speed for 2 stage models), de-energize the  
gas valve, and flash “6” on the LED. When the high temperature  
switch closes, the control will restart the ignition sequence  
beginning with pre-purge.  
High Heat  
If the W2 terminal was energized more than 1 second before  
W1 at the start of the call for heat, and remains continuously  
energized through the call for heat, the control considers it to be  
connected to a single stage thermostat and implements a 10  
minute Auto staging feature. The 2nd stage thermostat call is  
ignored until 10 minutes into steady heat (9 minutes after high  
heat warm-up ended).  
Rollout Switch  
If the rollout switch opens for more than 0.25 seconds, the  
control board will run the inducer (on high speed for 2 stage  
models) for a post-purge period, immediately de-energize the  
gas valve, and flash “7” on the LED. The blower output will be  
energized during an open rollout condition.  
The control recognizes a call for 2nd stage heat when W2 is  
energized (connected to “R”). The control energizes the high  
gas output and induced draft motor on high speed.  
If the rollout switch closes, the control shall remain locked out  
until power removed or “W” is removed.  
If the call for 2nd stage heat goes away and the 1st stage call  
remains, the control de energizes the high gas valve, drops  
inducer speed to low, and returns to low heat operation.  
Rollout switch lockout shall not reset automatically.  
Power Interruptions  
Power interruptions of any duration shall not cause lockout or  
any operation requiring manual intervention.  
Response to loss of W1, low pressure switch, and flame are  
identical to low heat operation.  
Flame present with Gas off  
Post Purge  
If flame is sensed for longer than 4.0 seconds during a period  
when the gas valve should be closed, the control will enter  
lockout flashing “8” on the LED. The control will turn on the  
inducer blower while the flame is present.  
The control board runs the induced draft motor for a 30 second  
post-purge period, and then de-energizes the inducer. If a call  
for heat occurs during post-purge, the control finishes the post-  
purge, drops inducer out to re-prove open pressure switch  
before continuing with the heat cycle.  
Unitary Products Group  
23  
279550-YIM-A-0207  
Welded Gas Valve Relay Response.  
Table 18: Ignition Control Board FLASH CODES  
Flash Code  
On Steady  
Heart Beat  
1 Flash  
Description  
If either or both Pilot and Main Gas valve outputs are sensed to  
be off for more than 1 seconds when commanded to be on the  
control board shuts off all outputs and enters a hard lockout  
Control Failure - Replace Control  
Normal Operation  
Not Applicable  
If the Pilot valve or Main valve output is sensed to be energized  
for more than 1 second when commanded to be off, the control  
de-energizes the induced draft motor (if flame is not present) to  
attempt to open the pressure switch to de-energize the gas  
valve. If the pilot or main gas valve is still sensed as energized  
after the inducer has been off for 5 seconds, the control re-  
energizes the inducer to attempt to vent the unburned gas. In  
either case, the control enters a hard lockout. If the pilot or main  
valve becomes Un-Welded the inducer will de-energize, but the  
control will remain in a hard lockout.  
2 Flashes  
3 Flashes  
4 Flashes  
5 Flashes  
6 Flashes  
7 Flashes  
8 Flashes  
Pressure / Centrifugal Switch Open with Inducer On  
Pressure / Centrifugal Switch Closed with Inducer Off  
Not Applicable  
Lock Out From Too Many Flame Losses  
High Temperature Switch Open (Primary or Aux.)  
Rollout Switch Open  
Flame Present With Gas OFF  
Cooling Sequence Of Operations  
When the thermostat calls for first-stage cooling, the thermostat  
terminals G and Y1 energize, signaling the compressor, indoor  
blower and outdoor fan to operate. The indoor blower will operate  
according to the fan delay profile selected using Table 17.  
During a hard lockout, the control board LED will remain off and  
the control will not respond to any thermostat demands.  
The only way to recover from a hard lockout is to remove and  
then reapply 24VAC power to the control board.  
When the thermostat calls for second-stage cooling the  
thermostat terminal Y2 energizes, signaling the compressor  
bypass ports to close and the indoor blower to increase speed.  
If the outdoor fan motor has an ECM controller, Y2 will also  
signal the motor to increase speed.  
Safety Controls  
The control circuit includes the following safety controls:  
1. Limit Switch (LS) - This control is located inside the heat  
exchanger compartment and is set to open at the  
temperature indicated in the Temperature Controls Table  
of the unit wiring diagram. It resets automatically. The limit  
switch operates when a high temperature condition caused  
by inadequate supply air flow occurs, thus shutting down  
the ignition control and closing the main gas valve and  
energizing the blower.  
When the thermostat is satisfied, terminals G, Y1 and Y2 are  
de-energized, thus stopping operation of the compressor and  
outdoor fan. The indoor blower will remain on according to the  
fan delay profile selected using Table 17.  
Safety Controls  
The control circuit includes the following safety controls:  
2. Pressure Switch (PS) - If the draft motor should fail, the  
pressure switch prevents the ignition controls and gas  
valves from being energized.  
1. High Pressure Switch (HP)- This switch protects against  
excessive discharge pressures due to a blocked  
condenser coil or a condenser motor failure (opens at 625  
± 25 psig and resets at 500 ± 25 psig).  
3. Flame Sensor - The flame sensor and controls are located  
per Proper Flame Adjustment Figure 19. If an ignition  
control fails to detect a signal from the flame sensor  
indicating the pilot flame is properly ignited, then the main  
gas valve will not open.  
2. Low Pressure Switch (LP)- This switch protects against  
loss of refrigerant charge (opens at 7 ± 3 psig and resets at  
22 ± 5 psig).  
4. Rollout Switch (RS) - This switch is located in the burner  
vestibule. In the event of a sustained main burner flame  
rollout, it shuts off the ignition control and closes the main  
gas valve.  
The above pressure switches are specifically designed to  
operate with R-410A systems. R-22 pressure switches must not  
be used as replacements for the R-410A pressure switches.  
NOTE: The manual reset Rollout Switch (RS) must be reset  
before allowing furnace operation.  
5. Auxiliary Limit Switch (ALS) - This control is located  
inside the heat exchanger compartment and is set to open  
at 160°F. It is a manual reset switch. If ALS trips, then the  
primary limit (LS) has not functioned correctly. Replace the  
primary limit LS.  
The ability to properly perform maintenance on this  
equipment requires certain expertise, mechanical  
skills, tools and equipment. If you do not possess  
these, do not attempt to perform any maintenance  
other than those procedures recommended in this  
Installation Manual. Failure to heed this warning could  
result in serious injury and possible damage to this  
equipment.  
24  
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279550-YIM-A-0207  
Circulating Fan  
To Turn Off Gas To Unit  
When the thermostat calls for FAN, the thermostat terminal G is  
energized signaling the circulating fan to run at the heat speed  
2 seconds after the G terminal is energized.  
1. Set the thermostat to the OFF position.  
2. Turn off all electric power to the appliance if service is to be  
performed.  
If a call for HEAT occurs, the circulating fan continues to run at  
the heat speed.  
3. Remove the control access panel.  
4. Turn the gas valve switch to the OFF position. DO NOT  
FORCE.  
If a call for COOL occurs, the circulating fan switches to cool  
speed according to the fan delay profile selected in Table 17.  
5. Replace the control access panel.  
When the thermostat ends the call for FAN, the thermostat  
terminal G is de-energized, de-energizing the circulating fan.  
Post Start Check List  
After the entire control circuit has been energized and the  
heating section is operating, make the following checks:  
Start-Up  
1. Check for gas leaks in the unit piping as well as the supply  
piping.  
Prestart Check List  
2. Check for correct manifold gas pressures. See Checking  
Gas Input.  
Complete the following checks before starting the unit.  
1. Check the type of gas being supplied. Be sure that it is the  
same as listed on the unit nameplate.  
3. Check the supply gas pressure. It must be within the limits  
shown on rating nameplate. Supply pressure should be  
checked with all gas appliances in the building at full fire. At  
no time should the standby gas line pressure exceed 13.5",  
nor the operating pressure drop below 4.5" for natural gas  
units. If gas pressure is outside these limits, contact the  
local gas utility for corrective action.  
2. Make sure that the vent outlet air hood has been properly  
installed.  
Operating Instructions  
1. STOP! Read the information on the unit safety label.  
2. Set the thermostat to the OFF position.  
3. Turn off all electrical power to the unit.  
Manifold Gas Pressure Adjustment  
Small adjustments to the gas flow may be made by turning the  
pressure regulator adjusting screw on the automatic gas valve.  
Refer to Figures 15 and 16.  
4. DO NOT try to light the burners by hand. This appliance is  
equipped with an ignition device which automatically lights  
the burners.  
Manual  
5. Remove the access panel.  
Gas Switch  
Pilot  
Adjustment  
6. Turn the gas valve switch to the OFF position.  
(Remove Cap)  
Electrical  
Connection  
7. Wait five (5) minutes to clear out any gas. If you then smell  
gas, STOP! Follow B in the information on the unit safety  
label. If you don't smell gas, go to the next step.  
8. Turn the gas valve switch to the ON position.  
9. Replace the control access panel.  
Manifold  
Pressure  
10. Turn on all electric power to the unit.  
11. Set the thermostat to the desired setting.  
Adjustment  
(Remove Cap)  
½ NPT  
(Outlet)  
Pilot Gas  
Connection  
Manifold  
Pressure Tap  
12. If the unit will not operate, follow the instructions To Turn  
Off Gas To Appliance and call your service technician or  
gas supplier.  
Figure 15: Single Stage Gas Valve Front  
Unitary Products Group  
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279550-YIM-A-0207  
3. To increase the gas pressure, turn the adjusting screw  
clockwise.  
Hi Fire  
(2nd Stage)  
Manifold Pressure  
Low Fire  
NOTE: The correct manifold pressure for natural gas furnaces  
is 3.5 IWG high heat and 1.5 IWG low heat. The correct  
manifold pressure for propane (LP) is 10.0 IWG high  
heat and 4.5 IWG low heat.  
(1st Stage)  
Manifold Pressure  
Adjustment  
Manual  
Gas  
Switch  
Burner Instructions  
Electrical  
Connection  
To check or change the burners, CLOSE THE MAIN MANUAL  
SHUT-OFF VALVE AND SHUT OFF ALL POWER TO THE  
UNIT.  
Manifold  
Pressure  
Tap  
1. Remove the two (2) #8 screws holding each burner in place.  
2. Remove the burner assembly from the manifold assembly  
by moving the burner assembly forward, turn at an angle  
and pull back.  
Pilot  
Adjustment  
(Remove Cap)  
½ NPT  
(Outlet)  
Pilot  
Gas  
Connect  
3. Burners are now accessible for service.  
Pilot Instruction  
Figure 16: Two Stage Gas Valve Front  
To adjust the pilot flame:  
3
"
8 min.  
Line  
Pressure  
Tap  
½ NPT  
(Inlet)  
Figure 17: Single Stage Gas Valve Rear  
Spark Ignitor  
Pilot  
Flame Sensor  
Figure 19: Proper Flame Adjustment  
1. Remove the pilot adjustment cover screw.  
2. Adjust the pilot adjustment screw to achieve the proper  
pilot flame.  
3. The pilot flame should envelope 3/8” of the end of the flame  
sensor and not contain any yellow color, see Figure 19.  
4. Replace the pilot adjustment cover screw after the pilot  
flame is set.  
½ NPT  
(Inlet)  
To check, adjust or remove the pilot assembly, CLOSE THE  
MAIN MANUAL SHUT-OFF VALVE AND SHUT OFF ALL  
POWER TO THE UNIT.  
Line Pressure  
Tap  
Figure 18: Two Stage Gas Valve Rear  
1. Disconnect the wiring from the control board to the pilot  
assembly.  
Adjust as follows:  
1. Remove the cap from the valve body. See Figures 15 and  
16 for location.  
2. Remove the two (2) #8 screws holding the pilot assembly  
in place.  
2. To decrease the gas pressure, turn the adjusting screw  
counterclockwise.  
3. Remove the pilot assembly.  
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279550-YIM-A-0207  
NOTE: To find the BTU input, multiply the number of cubic feet  
of gas consumed per hour by the BTU content of the gas  
in your particular locality. (Contact your gas company for  
this information since it varies widely from city to city.)  
Adjustment of Temperature Rise  
After about 20 minutes of high heat operation, determine the  
furnace temperature rise. Take readings of both the return air  
and the heated air in the ducts about six feet from the furnace  
where they will not be affected by radiant heat.  
1
Table 19: Gas Rate Cubic Feet Per Hour  
Size of Test Dial  
1/2 cu. ft.  
Seconds for  
One Rev.  
10  
The temperature rise (or temperature difference between the  
return air and the heated air from the furnace) must lie within  
the range shown on the rating plate and the data in Tables 9  
and 11.  
1 cu. ft.  
360  
300  
257  
225  
200  
180  
164  
150  
138  
129  
120  
113  
106  
100  
95  
90  
86  
82  
78  
75  
72  
69  
67  
180  
150  
129  
113  
100  
90  
82  
75  
69  
64  
60  
56  
53  
50  
47  
45  
43  
41  
39  
37  
36  
35  
34  
32  
31  
30  
12  
14  
16  
18  
20  
22  
24  
26  
28  
30  
32  
34  
36  
38  
40  
42  
44  
46  
48  
50  
52  
54  
56  
58  
After the temperature rise has been determined, the CFM can  
be calculated as follows:  
%78+ꢀ2XWSXW  
'HJUHHVꢀ)ꢀ7HPSꢀ5LVH     
ꢁꢂꢃꢄꢀ[ꢀ&)0  
25  
%78+ꢀ2XWSXW  
&)0     
ꢁꢂꢃꢄꢀ[ꢀ'HJUHHVꢀ)ꢀ7HPSꢀ5LVH  
Direct Drive Blower  
All units have direct drive, constant CFM blower motors.  
Checking Gas Heat Input  
Natural Gas  
64  
62  
60  
1. Turn off all other gas appliances connected to the gas meter.  
60  
2. With the furnace turned on, measure the time needed for  
one revolution of the hand on the smallest dial on the  
meter. A typical gas meter usually has a 1/2 or a 1 cubic  
foot test dial.  
1. EXAMPLE: By actual measurement, it takes 38 seconds for the  
hand on the 1-cubic foot dial to make a revolution with just a  
100,000 BTUH furnace running. Using this information, locate  
38 seconds in the first column of Table 19. Read across to the  
column headed “1 Cubic Foot,” where you will see that 95 cubic  
feet of gas per hour are consumed by the furnace at that rate.  
Multiply 95 x 1050 (the BTU rating of the gas obtained from the  
local gas company). The result is 99,750 BTUH, which is close  
to the 100,000 BTUH rating of the furnace.  
3. Using the number of seconds for each revolution and the  
size of the test dial increment, find the cubic feet of gas  
consumed per hour from Table 19.  
If the actual input is not within 5% of the furnace rating with  
allowance being made for the permissible range of the regulator  
setting, replace the orifice spuds with spuds of the proper size.  
Unitary Products Group  
27  
       
279550-YIM-A-0207  
Typical Wiring Diagrams  
Typical DNX024 Cooling Unit with Single Stage Gas Heat 208/230-1-60 volt Wiring Diagram  
28  
Unitary Products Group  
 
279550-YIM-A-0207  
Typical DNX024 Cooling Unit with Two Stage Gas Heat 208/230-1-60 volt Wiring Diagram  
Unitary Products Group  
29  
279550-YIM-A-0207  
Typical DNX036-048 Cooling Unit with Single Stage Gas Heat 208/230-1-60 volt Wiring Diagram  
30  
Unitary Products Group  
279550-YIM-A-0207  
Typical DNX036-048 Cooling Unit with Two Stage Gas Heat 208/230-1-60 volt Wiring Diagram  
Unitary Products Group  
31  
279550-YIM-A-0207  
Typical DNX036-048 Cooling Unit with Single Stage Gas Heat 208/230-3-60 volt Wiring Diagram  
32  
Unitary Products Group  
279550-YIM-A-0207  
Typical DNX036-048 Cooling Unit with Two Stage Gas Heat 208/230-3-60 volt Wiring Diagram  
Unitary Products Group  
33  
279550-YIM-A-0207  
Typical DNX036-048 Cooling Unit with Single Stage Gas Heat 460-3-60 volt Wiring Diagram  
34  
Unitary Products Group  
279550-YIM-A-0207  
Typical DNX036-048 Cooling Unit with Two Stage Gas Heat 460-3-60 volt Wiring Diagram  
Unitary Products Group  
35  
R-410A QUICK REFERENCE GUIDE  
Refer to Installation Instructions for specific installation requirements.  
R-410A Refrigerant operates at 50 - 70 percent higher pressures than R-22. Be sure that servicing  
equipment and replacement components are designed to operate with R-410A.  
R-410A Refrigerant cylinders are rose colored.  
Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400, or DOT BW400.  
Recovery equipment must be rated for R-410A.  
Do Not use R-410A service equipment on R-22 systems. All hoses, gages, recovery cylinders, charging  
cylinders and recovery equipment must be dedicated for use on R-410A systems only.  
Manifold sets must be at least 700 psig high side, and 180 psig low side, with 550 psig retard.  
All hoses must have a service pressure rating of 800 psig.  
Leak detectors must be designed to detect HFC refrigerants.  
Systems must be charged with liquid refrigerant. Use a commercial type metering device in the  
manifold hose.  
R-410A can only be used with POE type oils.  
POE type oils rapidly absorb moisture from the atmosphere.  
Vacuum pumps will not remove moisture from POE type oils.  
Do not use liquid line driers with a rated working pressure rating less than 600 psig.  
Do not install suction line driers in the liquid line.  
A liquid line drier is required on every unit.  
Do not use a R-22 TXV. If a TXV is to be used, it must be a R-410A TXV.  
Never open system to atmosphere when under a vacuum.  
If system must be opened for service, evacuate system then break the vacuum with dry nitrogen and  
replace all filter driers.  
Figure 20: R-410A Quick Reference Guide  
Subject to change without notice. Printed in U.S.A.  
279550-YIM-A-0207  
Copyright © 2007 by Unitary Products Group. All rights reserved.  
Supersedes: 98811-YIM-C-1006  
Unitary  
Products  
Group  
5005  
York  
Drive  
Norman  
OK  
73069  
 

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