York DNZ 060 User manual

ISO 9001
Certified Quality
Management System
CONTENTS
INSTALLATION SAFETY INFORMATION. . . . . . . . .3
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
MAINTENANCE AND RENEWAL PARTS. . . . . . . . .3
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . .4
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . .15
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . .19
See following pages for a complete Table of Contents.
NOTES, CAUTIONS AND WARNINGS
The installer should pay particular attention to the words:
NOTE, CAUTION, and WARNING. Notes are intended to
clarify or make the installation easier. Cautions are given to
prevent equipment damage. Warnings are given to alert
installer that personal injury and/or equipment damage may
result if installation procedure is not handled properly.
INSTALLATION
MANUAL
CAUTION: READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
CHAMPION® R-410A
SINGLE PACKAGE GAS/ELECTRIC
AIR-COOLED AIR CONDITIONERS
2, 2-1/2, 3, 3-1/2, 4 and 5 NOMINAL TON
WITH R-410A REFRIGERANT
MODELS: DNZ 024, 030, 036, 042, 048, and 060
66433-YIM-B-1004

66433-YIM-B-1004
2Unitary Products Group
TABLE OF CONTENTS
INSTALLATION SAFETY INFORMATION . . . . . . . . . . . . . 3
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
MAINTENANCE AND RENEWAL PARTS . . . . . . . . . . . . .3
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
LIMITATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
LOCATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
CLEARANCES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
RIGGING OR HANDLING . . . . . . . . . . . . . . . . . . . . . . . . .5
DUCT WORK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
ROOF CURB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
CONDENSATE DRAIN . . . . . . . . . . . . . . . . . . . . . . . . . . .6
SERVICE ACCESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
THERMOSTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
POWER AND CONTROL WIRING . . . . . . . . . . . . . . . . . .7
COMPRESSORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
PHASING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
GAS CONNECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
FLUE VENT HOOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . 15
HEATING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
HEATING SAFETY CONTROLS. . . . . . . . . . . . . . . . . . .15
COOLING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
COOLING SAFETY CONTROLS. . . . . . . . . . . . . . . . . . .15
CIRCULATING FAN. . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
PRE-START CHECK LIST. . . . . . . . . . . . . . . . . . . . . . . .16
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . .16
TO TURN OFF GAS TO UNIT. . . . . . . . . . . . . . . . . . . . .16
POST-START CHECK LIST (GAS). . . . . . . . . . . . . . . . .16
MANIFOLD GAS PRESSURE ADJUSTMENT . . . . . . . .16
BURNER INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . .17
HOT SURFACE PILOT INSTRUCTIONS . . . . . . . . . . . .17
ADJUSTMENT OF TEMPERATURE RISE . . . . . . . . . . .18
DIRECT DRIVE BLOWER . . . . . . . . . . . . . . . . . . . . . .18
CHECKING GAS INPUT . . . . . . . . . . . . . . . . . . . . . . . . .18
NATURAL GAS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
TYPICAL WIRING DIAGRAM NOTES
(SEE FIGURES 13, 14, AND 15). . . . . . . . . . . . . . . . . . .23
LIST OF FIGURES
Fig. # Pg. #
1 UNIT CENTER OF GRAVITY . . . . . . . . . . . . . . . . . . . . 5
2 FIELD WIRING DIAGRAM CONTROL WIRING. . . . . . 7
3 POWER WIRING FIELD DIAGRAM . . . . . . . . . . . . . . . 7
4 EXTERNAL SUPPLY CONNECTION EXTERNAL
SHUT-OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5 FLUE VENT OUTLET AIR HOOD. . . . . . . . . . . . . . . . 11
6 UNIT DIMENSIONS - FRONT. . . . . . . . . . . . . . . . . . . 13
7 UNIT DIMENSIONS - FRONT & BOTTOM. . . . . . . . . 14
8 UNIT DIMENSIONS - BACK & BOTTOM . . . . . . . . . . 14
9 GAS VALVE - FRONT. . . . . . . . . . . . . . . . . . . . . . . . . 17
10 GAS VALVE - REAR. . . . . . . . . . . . . . . . . . . . . . . . . . 17
11 PROPER FLAME ADJUSTMENT. . . . . . . . . . . . . . . . 17
12 IGNITOR AND FLAME SENSOR ASSEMBLY. . . . . . 18
13 TYPICAL WIRING DIAGRAM DNZ (208/230-1-60) . . 20
14 TYPICAL WIRING DIAGRAM DNZ (208/230-3-60) . . 21
15 TYPICAL WIRING DIAGRAM DNZ (460-3-60). . . . . . 22
16 R-410A QUICK REFERENCE GUIDE . . . . . . . . . . . . 23
LIST OF TABLES
Tbl. # Pg. #
1 UNIT APPLICATION DATA. . . . . . . . . . . . . . . . . . . . . . 4
2 UNIT WEIGHTS AND CENTER OF GRAVITY. . . . . . . 5
3 NATURAL GAS APPLICATION DATA . . . . . . . . . . . . . 9
4 PROPANE (LP) GAS APPLICATION DATA. . . . . . . . . 9
5 NATURAL GAS PIPE SIZING CHART . . . . . . . . . . . . 10
6 PROPANE (LP) GAS PIPE SIZING CHART. . . . . . . . 10
7 PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8 ELECTRICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . 12
9 UNIT DIMENSIONS FRONT. . . . . . . . . . . . . . . . . . . . 13
10 UNIT MINIMUM CLEARANCES . . . . . . . . . . . . . . . . . 13
11 GAS RATE - CUBIC FEET PER HOUR . . . . . . . . . . . 18

66433-YIM-B-1004
Unitary Products Group 3
INSTALLATION SAFETY INFORMATION
Read these instructions before continuing this appliance
installation. This is an outdoor combination heating and cool-
ing unit. The installer must assure that these instructions are
made available to the consumer and instruct the consumer to
retain them for future reference.
1. Refer to the unit rating plate for the approved type of gas
for this furnace.
2. Install this furnace only in a location and position as
specified on pages 4 and 5 of these instructions.
3. Never test for gas leaks with an open flame. Use com-
mercially available soap solution made specifically for
the detection of leaks when checking all connections, as
specified on pages 3 and 11 of these instructions.
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
pages 9 and 18 of these instructions.
5. This equipment is not to be used for temporary heating
of buildings or structures under construction.
GENERAL
YORK Model DNZ 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.
The gas-fired heaters have hot surface to pilot ignition. The
tubular heat exchangers are aluminized steel.
The refrigerant system is fully charged with R-410A Refriger-
ant, and is tested and factory sealed.
The installer should pay particular attention to the words;
NOTE, CAUTION, and WARNING. NOTES are intended to
clarify or make the installation easier. CAUTIONS are given
to prevent equipment damage. WARNINGS are given to alert
the installer that personal injury and/or equipment damage
may result if installation procedure is not handled properly.
INSPECTION
As soon as a unit is received, it should be inspected for possi-
ble damage during transit. If damage is evident, the extent of
the damage should be noted on the carrier's freight bill. A
separate request for inspection by the carrier's agent should
be made in writing. Refer to Form 50.15-NM for additional
information.
MAINTENANCE AND RENEWAL PARTS
Refer to User’s, Maintenance and Service Information Man-
ual, Part No. 035-19776-000.
APPROVALS
Design certified by CSA listed as follows:
1. For use as a forced air furnace with cooling unit.
2. For outdoor installation only.
3. For installation directly on combustible flooring or, in
U.S., on wood flooring or Class A; B; C roof covering
material.
4. For installation on combustible material.
5. For use with natural gas and/or propane (LP) gas.
Not suitable for use with conventional venting systems.
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings 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 specif-
ically for the detection of leaks to check all connec-
tions. A fire or explosion may result causing
property damage, personal injury or loss of life. This product must be installed in strict compliance
with the enclosed installation instructions and any
applicable local, state, and national codes includ-
ing but not limited to, building, electrical and
mechanical codes.
Improper installation may create a condition where
the operation of the product could cause personal
injury or property damage.
This system uses R-410A Refrigerant which oper-
ates at higher pressures than R-22. No other
refrigerant may be used in this system.

66433-YIM-B-1004
4Unitary Products Group
NOMENCLATURE
INSTALLATION
LIMITATIONS
These units must be installed in accordance with the follow-
ing national and local safety codes.
1. National Electrical Code ANSI/NFPS No. 70 or Canadian
Electrical Code Part 1, C22.1 (latest editions).
2. National Fuel Gas Code Z223.1 or CSA B149.1 Installa-
tion Code.
3. Local gas utility requirements.
4. Local plumbing and waste water codes and other appli-
cable local codes.
Refer to Table 1 for unit application data and to Tables 3 and
4 for gas heat application data.
If components are to be added to a unit to meet local codes,
they are to be installed at the dealer's and/or the customer's
expense.
Size of unit for proposed installation should be based on heat
loss/heat gain calculations made in accordance with industry
recognized procedures identified by the Air Conditioning
Contractors of America.
      
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!
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'( 
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$  $##
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 ,+-./
%$  %$0 -.
  0 -.
  0 -.
$%  $%0 -.
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  0 -.
"
((  .
 
+(  .
 
  0 -.
*  *0 -.
1%  1%0 -.
*  *0 -.
2  20 -.
  0 -.
  3  . !
 .&
TABLE 1: UNIT APPLICATION DATA
Voltage Variation
Min. / Max.1
1. Rated in accordance with ARI Standard 110, utilization
range “A”.
208/230V2
2. “T1” transformer primary tap must be moved from the
230 volt connection to the 208 volt connection for low
voltage applications of 208 volt and below
187 / 253
460V 414 / 504
Wet Bulb Temperature (°F) of Air on
Evaporator Coil, Min. / Max. 57 / 72
Dry Bulb Temperature (°F) of Air on
Condenser Coil, Min.3/ Max.
3. A low ambient accessory is available for operation
down to 0°F.
45 / 120

66433-YIM-B-1004
Unitary Products Group 5
LOCATION
Use the following guidelines to select a suitable location for
these units.
1. Unit is designed for outdoor installation only.
2. Condenser must have an unlimited supply of air. Where
a choice of location is possible, position unit on either
north or east side of building.
3. 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.
4. For roof top installation, be sure the structure will support
the weight of the unit plus any field installed components.
Unit must be installed on a level roof curb or appropriate
angle iron frame providing adequate support under the
compressor/condenser section.
5. Maintain level tolerance of unit to 1/8" maximum.
CLEARANCES
All units require certain clearances for proper operation and
service. Refer to Table 10 for the clearances required for
combustion, construction, servicing and proper unit opera-
tion.
RIGGING OR HANDLING
Care must be exercised when moving the unit. Do not
remove any packaging until the unit is near the place of
installation. Rig unit with slings placed under the unit.
Spreader bars of sufficient length should be used across the
top of the unit.
Units may also be moved or lifted with a fork-lift. Slotted
openings in the skid are provided for this purpose. Forks
must pass completely through the base.
Refer to Table 2 for unit weights and to Figure 1 for approxi-
mate center of gravity.
Excessive exposure of this furnace to contami-
nated combustion air may result in equipment
damage or personal injury. Typical contaminates
include: permanent wave solution, chlorinated
washes 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.
Do not permit overhanging structures or shrubs to
obstruct the condenser air discharge, combustion
air inlet or vent outlet.
Before lifting a unit, make sure that its weight is
distributed equally on the cables so that it will lift
evenly.
TABLE 2: UNIT WEIGHTS AND CENTER OF
GRAVITY
UNIT
SIZE
SHIPPING
WEIGHT
(LBS.)
OPERATING
WEIGHT
(LBS.)
CORNER WEIGHTS
(LOCATION, LBS.)
“A” “B” “C” “D”
024 365 360 91 88 89 92
030 395 390 98 95 96 99
036 400 395 100 96 98 101
042 470 465 131 129 101 103
048 475 470 133 130 102 104
060 485 480 136 133 105 107
FIGURE 1 - UNIT CENTER OF GRAVITY
"A"
"B"
"C"
"D"
49-1/8 25 25
47-1/4
FRONT
OF
UNIT
CENTER OF
GRAVITY

66433-YIM-B-1004
6Unitary Products Group
DUCT WORK
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:
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).
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.
3. Seal duct covers with silicone caulk.
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 pre-
clude use of economizers or ventilation air intake. Flexible
joints may be used in the supply and return duct work to min-
imize the transmission of noise.
NOTE: Be sure to note supply and return openings.
Refer to Figures 7 and 8 for information concerning rear and
bottom supply and return air duct openings.
ROOF CURB
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.
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).
A filter rack and high velocity filters are standard on three
phase units.
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.
Filters should be checked monthly; this is especially impor-
tant since this unit is used for both heating and cooling.
CONDENSATE DRAIN
A condensate trap is recommended to be installed in the con-
densate drain. The plumbing must conform to local codes.
Use a sealing compound on male pipe threads. Install the
condensate drain line (NPTF) to spill into an open drain.
SERVICE ACCESS
Access to all serviceable components is provided at the fol-
lowing locations:
• Blower compartment access panel
• Gas control/electrical access panel
• Refrigerant connections
Refer to Figure 6 for location of these access locations and
minimum clearances in Table 10.
Refer to Figure 16 for the R-410A Quick Reference Guide.
THERMOSTAT
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. Four color
When fastening duct work to the side duct flanges
on the unit, insert the screws through the duct
flanges only. Do not insert the screws through the
casing. Outdoor ductwork must be insulated and
waterproofed.
This system uses R-140A Refrigerant which oper-
ates at higher pressures than R-22. No other
refrigerant may be used in this system. Gage sets,
hoses, refrigerant containers and recovery sys-
tems must be designed to handle R-410A. If you
are unsure, consult the equipment manufacturer.
Failure to use R-410A compatible servicing equip-
ment may result in property damage or injury.
Wear safety glasses and gloves when handling
refrigerants. Failure to follow this warning can
cause serious personal injury.

66433-YIM-B-1004
Unitary Products Group 7
coded insulated wires (minimum #18 AWG) should be used
to connect thermostat to unit. See Figure 2.
POWER AND CONTROL WIRING
Field wiring to the unit must conform to provisions of the cur-
rent N.E.C. ANSI/NFPA No. 70 or C.E.C. and/or local ordi-
nances. 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 com-
pressor terminals during starting and running conditions are
indicated on the unit Rating Plate and Table 8.
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.
Refer to Figure 3 for typical field wiring and to the appropriate
unit wiring diagram for control circuit and power wiring infor-
mation.
FIGURE 2 - FIELD WIRING DIAGRAM CONTROL WIRING
R
G
W
R
G
C
YY
W
C
PROGRAMMABLE
THERMOSTAT ONLY
**
*
*=Minimumwiresizeof18AWG
wire should be used for all
field installed 24 volt wire.
THERMOSTAT UNIT TERMINAL STRIP
NOTE:
HEAT ANTICIPATOR
SHOULD BE SET AT 0.35
AMPS FOR ALL MODELS.
24 VOLT
TRANSFORMER
FIGURE 3 - POWER WIRING FIELD DIAGRAM
G R O U N D
L U G
R E F E R T O E L E C T R I C A L
D A T A T A B L E S T O S I Z E
T H E D I S C O N N E C T
F I E L D - S U P P L I E D
D I S C O N N E C T
C O N T A C T O R
F I E L D - S U P P L I E D
D I S C O N N E C T
C O N T A C T O R
G R O U N D
L U G R E F E R T O E L E C T R I C A L
D A T A T A B L E S T O S I Z E
T H E D I S C O N N E C T
S I N G L E
PH A S E
P O W E R
S U P P L Y
T H R E E
PHASE
P O W E R
S U P P L Y

66433-YIM-B-1004
8Unitary Products Group
COMPRESSORS
The scroll compressor used in this product is specifically
designed to operate with R-410A Refrigerant and cannot be
interchanged.
The compressor also uses a polyolester (POE oil), Mobil 3MA
POE. This oil is extremely hygroscopic, 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.
POE (polyolester) compressor lubricants are known to cause
long term damage to some synthetic roofing materials.
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.
Units are shipped with compressor mountings which are
factory-adjusted and ready for operation.
PHASING
Three-phase, scroll compressors operate in only one direc-
tion. 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.
This system uses R-410A Refrigerant which oper-
ates at higher pressures than R-22. No other
refrigerant may be used in this system.
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
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.
Do not loosen compressor mounting bolts.
Scroll compressors require proper rotation to oper-
ate properly. Failure to check and correct rotation
may result in property damage.

66433-YIM-B-1004
Unitary Products Group 9
TABLE 3: NATURAL GAS APPLICATION DATA
AVAILABLE ONMODELS INPUT CAPACITY
(MBH)1OUTPUT CAPACITY
(MBH)GAS RATE2
FT.3/HR.NUMBER OF
BURNERS
TEMP. RISE ºF A FULL
INPUT3
MIN.MAX.
2, 2-1/2, 3 TON 45 36 42 2 25 55
2, 2-1/2, 3 TON 70 56 65 3 25 55
3-1/2, 4, 5 TON 80 64 74 3 25 55
3 TON 90 72 84 4 30 60
3-1/2, 4, 5 TON 108 87 100 4 30 60
4, 5 TON 135 108 126 5 35 65
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 4: PROPANE1(LP) GAS APPLICATION DATA
AVAILABLE ON
MODELS
INPUT CAPACITY
(MBH)2OUTPUT CAPACITY
(MBH)GAS RATE3
FT.3/HR.NUMBER OF
BURNERS
TEMP. RISE ºF A FULL
INPUT4
MIN.MAX.
2, 2-1/2, 3 TON 45 36 18 2 25 55
2, 2-1/2, 3 TON 70 56 28 3 25 55
3-1/2, 4, 5 TON 80 64 32 3 25 55
3 TON 90 72 36 4 30 60
3-1/2, 4, 5 TON 108 87 43 4 30 60
4, 5 TON 135 108 54 5 35 65
1. Propane applications are accomplished by field installation of a Propane Conversion Accessory, Model 1NP0805.
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 temperatures should not
be below 55°F.

66433-YIM-B-1004
10 Unitary Products Group
GAS PIPING
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 5 & 6.
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 specify-
ing a minimum diameter for gas piping. All units
require a 1/2 inch pipe connection at the gas valve.
GAS CONNECTION
The gas supply line can be routed through the hole located
on the left side of the unit. Refer to Figure 6 to locate these
access openings. Typical supply piping arrangements are
shown in Figure 4.
Gas piping requirements:
1. A drip leg and a ground joint union must be installed in
the gas piping.
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.
FIGURE 4 - EXTERNAL SUPPLY CONNECTION
EXTERNAL SHUT-OFF
1 / 2 x 1 / 2 G A S C O C K
1 / 2 x 1 / 2 U N I O N
A U T O M A T I C
G A S V A L V E
D R I P L E G
1 / 2 - 1 4 N P
T
TABLE 5: NATURAL GAS PIPE SIZING CHART1
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).
LENGTH
IN FEET
NOMINAL INCHES IRON PIPE SIZE
1/2” 3/4” 1” 1-1/4”
10 132 278 520 1,050
20 92 190 350 730
30 73 152 285 590
40 63 130 245 500
50 56 115 215 440
60 50 105 195 400
70 46 96 180 370
80 43 90 170 350
90 40 84 160 320
100 38 79 150 305
TABLE 6: PROPANE (LP) GAS PIPE SIZING
CHART1
1. Maximum capacity of pipe in thousands of BTU per
hour (based upon a pressure drop of 0.5 inch water col-
umn).
LENGTH
IN FEET
NOMINAL INCHES IRON PIPE SIZE
1/2” 3/4” 1” 1-1/4”
10 275 567 1,071 2,205
20 189 393 732 1,496
30 152 315 590 1,212
40 129 267 504 1,039
50 114 237 448 913
60 103 217 409 834
70 96 196 378 771
80 89 185 346 724
90 83 173 322 677
100 78 162 307 630