GZKDJRRJDGHZ2[JZFJR
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
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
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
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
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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
Unitary Products Group
279550-YIM-A-0207
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
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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
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279550-YIM-A-0207
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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.
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.
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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
• Blower compartment access panel
• Gas control/electrical access panel
• Refrigerant connections
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.
appropriate unit wiring diagram for control circuit and power
wiring information.
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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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Figure 9: Typical Field Control Wiring Diagram Two Stage Thermostat - Single Stage Gas Heat
Unitary Products Group
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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
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
openings. Typical supply piping arrangements are shown in
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
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
Unitary Products Group
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
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
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.
Unitary Products Group
21
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
Unitary Products Group
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.
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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
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
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.
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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
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.
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
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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:
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
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
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
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
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279550-YIM-A-0207
Typical DNX024 Cooling Unit with Two Stage Gas Heat 208/230-1-60 volt Wiring Diagram
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279550-YIM-A-0207
Typical DNX036-048 Cooling Unit with Single Stage Gas Heat 208/230-1-60 volt Wiring Diagram
30
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279550-YIM-A-0207
Typical DNX036-048 Cooling Unit with Two Stage Gas Heat 208/230-1-60 volt Wiring Diagram
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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
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279550-YIM-A-0207
Typical DNX036-048 Cooling Unit with Single Stage Gas Heat 460-3-60 volt Wiring Diagram
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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
|