Coleman ZW Series User manual

R-410A
ZW SERIES
15 - 25 Ton
60 Hertz
GZKDJRRJDGHZ2[JZFJR
178113-BIM-D-0906
TABLE OF CONTENTS
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Rigging And Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Ductwork. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Condensate Drain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Compressors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Power And Control Wiring. . . . . . . . . . . . . . . . . . . . . . . . . 14
Optional Electric Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Optional Gas Heat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Options/Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Economizer And Power Exhaust Set Point
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Air Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Cooling Sequence Of Operation. . . . . . . . . . . . . . . . . . . . 41
No Outdoor Air Options . . . . . . . . . . . . . . . . . . . . . . . . . 41
Cooling Operation Errors . . . . . . . . . . . . . . . . . . . . . . . . 42
Electric Heating Sequence Of Operations . . . . . . . . . . . . 43
Electric Heat Operation Errors . . . . . . . . . . . . . . . . . . . . 43
Gas Heating Sequence Of Operations . . . . . . . . . . . . . . . 44
Gas Heating Operation Errors . . . . . . . . . . . . . . . . . . . . 45
Start-Up (Cooling) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Start-Up (Gas Heat) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Checking Gas Heat Input . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Charging The Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Unit Control Board Option Setup. . . . . . . . . . . . . . . . . . . . . . 56
Option Byte Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Heat Delay Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
LIST OF TABLES
1 ZW-15 thru -25 Unit Limitations . . . . . . . . . . . . . . . . . . . . 7
2 Weights and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 ZW-15 thru -25 Unit Accessory Weights. . . . . . . . . . . . . . 9
4 Utilities Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 ZW-15 thru -25 Unit Clearances . . . . . . . . . . . . . . . . . . . 11
6 Control Wire Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7 Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8 ZW-15 thru -25 Physical Data. . . . . . . . . . . . . . . . . . . . . 20
9 Electric Heat Minimum Supply Air. . . . . . . . . . . . . . . . . . 21
10 Gas Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
11 Gas Pipe Sizing - CapacIty of Pipe. . . . . . . . . . . . . . . . . 22
12 Gas Heat Minimum Supply Air . . . . . . . . . . . . . . . . . . . . 22
13 Altitude/Temperature Correction Factors . . . . . . . . . . . . 27
14 ZW Cooling Only Bottom Duct Blower Performance . . . 28
15 ZW Gas Heat Bottom Duct Blower Performance . . . . . . 33
16 Indoor Blower Specifications. . . . . . . . . . . . . . . . . . . . . . 40
17 Power Exhaust Specifications . . . . . . . . . . . . . . . . . . . . 40
18 Additional Static Resistance . . . . . . . . . . . . . . . . . . . . . . 41
19 Limit Control Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
20 Electric Heat Anticipator Setpoint . . . . . . . . . . . . . . . . . . 44
21 Gas Heat Limit Control Setting . . . . . . . . . . . . . . . . . . . . 46
22 Gas Heat Anticipator Setpoints. . . . . . . . . . . . . . . . . . . . 46
23 Gas Rate Cubic Feet Per Hour. . . . . . . . . . . . . . . . . . . . 47
24 Unit Control Board Flash Codes . . . . . . . . . . . . . . . . . . . 55
25 Heat Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
LIST OF FIGURES
1 ZW-15 thru -25 Component Location. . . . . . . . . . . . . . . . 6
2 Unit 4 Point Load Weight . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Unit 6 Point Load Weight . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Center of Gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 ZW-15 thru -25 Unit Dimensions Front View . . . . . . . . . . 9
6 ZW-15 thru -25 Unit Dimensions Rear View . . . . . . . . . 10
7 ZW-15 thru -25 Unit Dimensions Rain Hood . . . . . . . . . 11
8 ZW-15 thru -25 Roof Curb . . . . . . . . . . . . . . . . . . . . . . . 12
9 Fixed Outdoor Air Damper . . . . . . . . . . . . . . . . . . . . . . . 13
10 Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
11 Field Wiring Disconnect - Cooling Unit With/Without
Electric Heat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
12 Field Wiring 24 Volt Thermostat. . . . . . . . . . . . . . . . . . . 15
13 External Supply Connection External Shut-Off . . . . . . . 22
14 Bottom Supply Connection External Shut-Off . . . . . . . . 22
15 Vent and Combustion Air Hood . . . . . . . . . . . . . . . . . . . 24
16 Enthalpy Set Point Chart . . . . . . . . . . . . . . . . . . . . . . . . 25
17 Honeywell Economizer Control W7212 . . . . . . . . . . . . . 25
18 Belt Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
19 Altitude/Temperature Correction Factors. . . . . . . . . . . . 27
20 Pressure Drop Across A Dry Indoor Coil Vs. Supply
Air CFM For All Unit Tonnages . . . . . . . . . . . . . . . . . . . 40
21 Gas Valve Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
22 Gas Valve and Controls. . . . . . . . . . . . . . . . . . . . . . . . . 46
23 Proper Pilot Flame Adjustment . . . . . . . . . . . . . . . . . . . 48
24 Typical Flame. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
25 Typical Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
26 ZW-15 (15 Ton) Charging Chart . . . . . . . . . . . . . . . . . . 49
27 ZW-18 (17.5 Ton) Charging Chart . . . . . . . . . . . . . . . . . 49
28 ZW-20 (20 Ton) Charging Chart . . . . . . . . . . . . . . . . . . 49
29 ZW-25 (25 Ton) Charging Chart . . . . . . . . . . . . . . . . . . 49
30 Unit Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

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General
UPG Model ZW units are either single package air conditions
equipped with optional factory installed electric heaters, or single
package gas-fired central heating furnaces with cooling unit.
Both are designed for outdoor installation on a rooftop or slab.
The units are completely assembled on rigid, permanently
attached base rails. All piping, refrigerant charge, and electrical
wiring is factory installed and tested. The units require electric
power, gas connection, duct connections, installation of
combustion air inlet hood, flue gas outlet hoods and fixed
outdoor air intake damper (units without economizer or
motorized damper option only) at the point of installation.
The supplemental electric heaters have nickel-chrome
elements and utilize single point power connection.
These gas-fired heaters have aluminized-steel or optional
stainless steel, tubular heat exchangers with spark ignition with
proven pilot. All gas heaters are shipped from the factory equipped
for natural gas use, but can be field converted to L.P./Propane with
Kit Model # 1NP0418. See Gas Heat Application Data Table.
Safety Considerations
This is a safety alert symbol. When you see this symbol on
labels or in manuals, be alert to the potential for personal injury.
Understand and pay particular attention the signal words
DANGER, WARNING or CAUTION.
DANGER indicates an imminently hazardous situation, which,
if not avoided, will result in death or serious injury.
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.
Due to system pressure, moving parts, and electrical
components, installation and servicing of air conditioning
equipment can be hazardous. Only qualified, trained service
personnel should install, repair, or service this equipment.
Untrained personnel can perform basic maintenance functions
of cleaning coils and filters and replacing filters.
Observe all precautions in the literature, labels, and tags
accompanying the equipment whenever working on air
conditioning equipment. Be sure to follow all other applicable
safety precautions and codes including ANSI Z223.1 or CSA-
B149.1- latest edition.
Improper installation may create a condition where the
operation of the product could cause personal injury or
property damage. Improper installation, adjustment,
alteration, service or maintenance can cause injury or
property damage. Refer to this manual for assistance or
for additional information, consult a qualified contractor,
installer or service agency.
This product must be installed in strict compliance with
the installation instructions and any applicable local,
state and national codes including, but not limited to
building, electrical, and mechanical codes.
Before performing service or maintenance operations on
unit, turn off main power switch to unit. Electrical shock
could cause personal injury. Improper installation,
adjustment, alteration, service or maintenance can
cause injury or property damage. Refer to this manual.
For assistance or additional information consult a
qualified installer, service agency or the gas supplier.
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 useR-410A compatible servicing
equipment may result in property damage or injury.
If the information in this manual is not followed exactly, a
fire or explosion may result causing property damage,
personal injury or loss of life.
Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS:
a. Do not try to light any appliance.
b. Do not touch any electrical switch; do not use any
phone in your building.
c. Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
d. If you cannot reach your gas supplier, call the fire
department.
Installation and service must be performed by a qualified
installer, service agency or the gas supplier.

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Wear safety glasses and work gloves. Use quenching cloth and
have a fire extinguisher available during brazing operations.
Inspection
As soon as a unit is received, it should be inspected for possible
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.
Reference
Additional information is available in the following reference
forms:
• Technical Guide - ZW-15 thru -25, 254605
• General Installation - ZW-15 thru -25, 178113
Renewal Parts
Contact your local UPG parts distribution center for authorized
replacement parts.
Approvals
Design certified by CSA as follows:
1. For use as a cooling only unit, cooling unit with
supplemental electric heat or a forced air furnace.
2. For outdoor installation only.
3. For installation on combustible material.
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.
The furnace and its individual shut-off valve must be
disconnected from the gas supply piping system during
any pressure testing at pressures in excess of 1/2 PSIG.
Pressures greater than 1/2 PSIG will cause gas valve
damage resulting in a hazardous condition. If it is
subjected to a pressure greater than 1/2 PSIG, the gas
valve must be replaced.
The furnace must be isolated from the gas supply piping
system by closing its individual manual shut-off valve
during any pressure testing of the gas supply piping
system at test pressures equal to or less than 1/2 PSIG
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.
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 operates at
higher pressures than R-22. No other refrigerant may be
used in this system.

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Nomenclature
Z W -20 N30 A T A AA 1 0 1 2 4 A
Z = A/C, Single Pkg., R-410A
Product Category
Airflow
1 = First Generation
Product Generation
C00 = Cooling Only. No field installed
electric heat
Heat Type and Nominal Heat Capacity
N30 = 300 MBH Input Aluminized Steel
N40 = 400 MBH Input Aluminized Steel
S30 = 300 MBH Input Stainless Steel
S40 = 400 MBH Input Stainless Steel
E18 = 18 KW
E36 = 36 KW
E54 = 54 KW
E72 = 72 KW
Gas Heat Options
Electric Heat Options
-15 = 15 Ton
Nominal Cooling Capacity
-18 = 17.5 Ton (DW & DU Only)
-20 = 20 Ton
-25 = 25 Ton
Product Identifier
W = 11.0+ EER A/C
Voltage
T = 208/230-3-60
W = 460-3-60
X = 575-3-60
Product Style
A = Style A
A = No Options Installed
Installation Options
B = Option 1
C=Option2
D=Options1&2
E=Option3
F=Option4
G=Options1&3
H = Options 1 & 4
J=Options1,2&3
K=Options1,2,&4
L = Options 1,3 & 4
M = Options 1, 2, 3, & 4
N = Options 2 & 3
P=Options2&4
Q=Options2,3,&4
R = Options 3 & 4
S=Option5
T = Options 1 & 5
U = Options 1, 3, & 5
V=Options1,4,&5
W = Options 1, 3, 4, & 5
X = Options 3 & 5
Y = Options 4 & 5
Z=Options3,4&5
1 = Disconnect
2 = Non-Pwr'd Conv. Outlet
3 = Smoke Detector S.A.
4 = Smoke Detector R.A.
5=Pwr'dConv.Outlet
Options
SS Drain Pan
Configuration Options (not required for all units)
These four digits will not be assigned until a quote is requested, or an order placed.
CPC Controller, DFS, APS
Johnson Controller, DFS, APS
Honeywell Controller, DFS, APS
Novar Controller, DFS, APS
Simplicity IntelliComfort Controller
Simplicity IntelliComfort Controller w/ModLinc
2" Pleated filters
4" Pleated filters
BAS Ready Unit with Belimo Economizer
Double Wall Construction
Any Combination of Additional Options that Don’t Have an Option Code Pre-assigned
AA = None
Standard Cabinet
AB = Phase Monitor
AC = Coil Guard
AD = Dirty Filter Switch
AE = Phase Monitor & Coil Guard
AF = Phase Monitor & Dirty Filter Switch
AG = Coil Guard & Dirty Filter Switch
AH = Phase Monitor, Coil Guard & Dirty Filter Switch
RC = Coil Guard & American Flag
TA = Technicoat Condenser Coil
TJ = Technicoat Evaporator Coil
TS = Technicoat Evaporator & Condenser Coils
BA = Hinged Filter Door & Toolless Access Panels
Additional Options
HingedFilterDoor&Toolless Access Cabinet
BB = Phase Monitor, Hinged Filter Door & Toolless
Access Panels
BC = Coil Guard, Hinged Filter Door & Toolless
Access Panels
BD = Dirty Filter Switch, Hinged Filter Door &
Toolless Access Panels
BE = Phase Monitor & Coil Guard, Hinged Filter
Door & Toolless Access Panels
BF = Phase Monitor & Dirty Filter Switch, Hinged
Filter Door & Toolless Access Panels
BG = Coil Guard & Dirty Filter Switch, Hinged Filter
Door & Toolless Access Panels
BH = Phase Monitor, Coil Guard & Dirty Filter Switch,
Hinged Filter Door & Toolless Access Panels
15-25 Ton Model Number Nomenclature
ZZ = If desired option combination is not listed above, ZZ will be assigned and configuration options will be
located in digits 15-18.
A = Std. Drive
B = Std. Drive/Single Input Econo.
C = Std. Drive/Single Input Econo./Power Exhaust
(Downflow Only)
D = Std. Drive/Motorized Damper
N = Hi Static Drive
P = Hi Static Drive/Single Input Econo.
Q = Hi Static Drive/Single Input Econo./Power Exhaust
(Downflow Only)
R = Hi Static Drive/Motorized Damper

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Installation
Installation Safety Information
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.
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 7 of these instructions.
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 5, 23 and 47 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
Page 22 of these instructions.
5. This equipment is not to be used for temporary heating of
buildings or structures under construction.
Limitations
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
3. Gas-Fired Central Furnace Standard, ANSI Z21.47a. -
Latest Edition
4. Local building codes, and
5. Local gas utility requirements
In Canada:
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.
Refer to unit application data found in this document.
After installation, gas fired units must be adjusted to obtain a
temperature rise within the range specified on the unit rating
plate.
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.
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).
This furnace is not to be used for temporary heating of buildings
or structures under construction.
FIRE OR EXPLOSION HAZARD
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.

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Figure 1: ZW-15 thru -25 Component Location
Simplicity
®
Control Board
110 Volt Convenience
Outlet (“Powered” or
“Non-Powered” Optional)
Disconnect Location
(Optional Disconnect Switch)
Bottom Power and
Control Wiring Entry
Power Ventor Motor
Electric Heater Location
(Optional Electric/Electric Units)
Belt Drive
Blower Motor
14 Gauge
Base Rails
with Lifting Holes
Filter Drier
(Solid Core)
Thermal
Expansion
Valve
Copper Tube/
Aluminum Fin
Evaporator
Coils
2” Disposable Filters
(4” Filters Optional)
Slide In/ Plug In
Internal Economizer
(Optional)
1” NPT
Condensate Drain
4-High Efficiency Scroll Compressors
Copper Tube/Aluminum Fin
Condenser Coils

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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.
3. Suitable for mounting on roof curb.
4. For ground level installation, use a level concrete slab with
a minimum thickness of 4 inches. The length and width
should be at least 6 inches greater than the unit base rails.
Do not tie slab to the building foundation.
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 1/2” across the entire width and
length of unit.
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
codes. Refer to Table 5 for clearances required for combustible
construction, servicing, and proper unit operation.
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.
Table 1: ZW-15 thru -25 Unit Limitations
Size
(Tons) Unit Voltage Unit Limitations
Applied Voltage Outdoor DB Temp
Min Max Max (°F)
-15
(15)
208/230-3-60 187 252 125
460-3-60 432 504 125
575-3-60 540 630 125
-18
(17.5)
208/230-3-60 187 252 125
460-3-60 432 504 125
575-3-60 540 630 125
-20
(20)
208/230-3-60 187 252 125
460-3-60 432 504 125
575-3-60 540 630 125
-25
(25)
208/230-3-60 187 252 125
460-3-60 432 504 125
575-3-60 540 630 125
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.
Do not permit overhanging structures or shrubs to
obstruct condenser air discharge outlet, combustion air
inlet or vent outlets.
If a unit is to be installed on a roof curb other than a
UPG roof curb, gasketing must be applied to all surfaces
that come in contact with the unit underside.

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Units may be moved or lifted with a forklift. Slotted openings in
the base rails are provided for this purpose.
LENGTH OF FORKS MUST BE A MINIMUM OF 90 INCHES.
Figure 2: Unit 4 Point Load Weight
Figure 3: Unit 6 Point Load Weight
Figure 4: Center of Gravity
Before lifting, make sure the unit weight is distributed
equally on the rigging cables so it will lift evenly.
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.
A
D
B
C
A
D
E
C
F
B
XY
LEFT FRONT
Table 2: Weights and Dimensions
Size
(Tons) Weight (lbs.) Center of Gravity 4 Point Load Location (lbs.) 6 Point Load Location (lbs.)
ShippingOperatingX Y ABCDABCDEF
-15
(15) 2614 2609 85.25 44 467 781 852 510 287 392 568 620 428 313
-18
(17.5) 2670 2665 85.25 44 477 797 870 520 293 401 580 633 437 320
-20
(20) 2702 2697 85.05 44 485 805 878 529 298 406 585 638 443 326
-25
(25) 2788 2783 85.25 44 498 833 908 544 306 419 606 661 457 334

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Figure 5: ZW-15 thru -25 Unit Dimensions Front View
Note: All entry holes should be sealed to prevent rain water entry
into building.
Table 3: ZW-15 thru -25 Unit Accessory Weights
Unit Accessory Weight (lbs.)
Shipping Operating
Economizer 165 160
Power Exhaust 250 245
Electric Heat140 40
Gas Heat2240 240
Double Wall 260 260
Motorized Damper 150 150
Barometric Damper 50 45
Econ./Motorized Damper Rain Hood 60 55
Econ./Power Exhaust Rain Hood 95 90
Wood Skid 220 220
Roof Curb 190 185
1. Weight given is for the maximum heater size available (54KW).
2. Weight given is for the maximum number of tube heat exchangers available (8 tube).
11-1/2
(A) CONTROL WIRING
ENTRY
COIL
GUARD
KIT
CONDENSER
COILS
(B) POWER
WIRING
ENTRY
5
9-3/4
21.00
6-3/8
7-1/8
35
5-7/8
136-1/4
GAS OR ELECTRIC
HEAT
ACCESS
DOT PLUG
(For pressure
drop reading)
BLOWER
COMPARTMENT
ACCESS
(Auxiliary)
(C) GAS
SUPPLY
ENTRY
CONTROL BOX
ACCESS
VENT AIR
OUTLET
HOODS
BLOWER
MOTOR
ACCESS BLOWER
ACCESS
52-5/8
180-19/32 COMPRESSOR ACCESS
DISCONNECT
SWITCH
LOCATION
ECONOMIZER / MOTORIZED DAMPER
FIXED OUTDOOR INTAKE AIR AND
POWER EXHAUST RAIN HOODS
(See detail Y)
92
46-5/8
35-1/4
33
2-3/4 3-3/4
(B) POWER WIRING
ENTRY
BOTTOM SUPPLY
AND RETURN
AIR OPENINGS
(See Note)
(A) CONTROL WIRING
ENTRY
21-1/2
11-1/8
(D)
GAS SUPPLY
ENTRY
UNIT BASE RAILS
Shown separately to illustrate
RETURN
AIR
Bottom Duct openings. Power
and Gas Piping Connection
location.
NOTE:
For curb mounted units, refer to the curb hanger
dimensions of the curb for proper size of the
supply and return air duct connections. 12-1/2
9-1/4
8-1/8
46-5/8
9-3/4
COMBUSTION
AIR INLET HOOD
SUPPLY
AIR
All dimensions are in inches.
They aresubject to change without notice.
Certified dimensions will be provided
upon request.
Table 4: Utilities Entry
Hole Opening Size
Diameter Used For
A1-1/8” KO Control Wiring Front
3/4” NPS (Fem.) Bottom
B3-5/8” KO Power Wiring Front
3” NPS (Fem.) Bottom
C 2-3/8” KO Gas Piping (Front)1
1. One-inch Gas Piping NPT Required.
D 1-11/16” Hole Gas Piping (Bottom)1,2
2. Opening in the bottom to the unit can be located by the slice in the
insulation.

178113-BIM-D-0906
10 Unitary Products Group
Figure 6: ZW-15 thru -25 Unit Dimensions Rear View
NOTE: Units are shipped with the bottom duct openings
covered. An accessory flange kit is available for
connecting side ducts.
For bottom duct applications:
1. Remove the side panels from the supply and return air
compartments to gain access to the bottom supply and
return air duct covers.
2. Remove and discard the bottom duct covers. Duct
openings are closed with sheet metal covers except when
the unit includes a power exhaust option. The covering
consists of a heavy black paper composition.
3. Replace the side supply and return air compartment
panels.
For side duct applications:
1. Replace the side panels on the supply and return air
compartments with the accessory flange kit panels.
2. Connect ductwork to the flanges on those panels.
Outdoor
Air
Supply
Air
Return
Air
40-1/2”
39-5/8”
Outdoor Air
Compartment
Access
Return Air
Access
Supply Air
Access
1” NPT Female
Cond. Drain
Connector
Evaporator
Section
Filter
Access
Dot Plug
(for Pressure
Drop Reading)
27-3/4”
18-5/8”
5-1/8”
40-3/8”
Dimensions listed are for side duct
flange opening; see Field Accessories
for Side Duct Flange Kit.

178113-BIM-D-0906
Unitary Products Group 11
Figure 7: ZW-15 thru -25 Unit Dimensions Rain Hood
Note: ELEC/ELEC Models: Units and ductwork are approved for zero clearance to combustible material when
equipped with electric heaters.
GAS/ELEC Models: A 1" clearance must be provided between any combustible material and the supply air
ductwork for a distance of 3 feet from the unit.
The products of combustion must not be allowed to accumulate within a confined space and recirculate.
Locate unit so that the vent air outlet hood is at least:
• Three (3) feet above any force air inlet located within 10 horizontal feet (excluding those integral to the unit).
• Four (4) feet below, four horizontal feet from, or one foot above any door or gravity air inlet into the building.
• Four (4) feet from electric and gas meters, regulators and relief equipment.
Table 5: ZW-15 thru -25 Unit Clearances
Direction Distance (in.) Direction Distance (in.)
Top1
1. Units must be installed outdoors. Over hanging structure or shrubs should not obscure condenser air discharge
outlet.
72 With 36 Maximum
Horizontal Overhang (For
Condenser Air Discharge) Right 36
Front 36 Bottom2
2. Units may be installed on combustable floors made from wood or class A, B or C roof covering materials.
0
Rear 24 (W/O Economizer) Left 24 (W/O Economizer)
49 (W/Economizer) 36 (W/Economizer)3
3. If economizer is factory installed, the unassembled rain hood must be removed from its ride along position in front of
the evaporator coil, or in the outdoor air compartment, prior to final installation.
LH View
92”28-3/16”
36-5/8”
5”
16-1/8”
Rear View
Supply Air
Compartment
Power Exhaust
Rain Hood
(on Return
Air Compartment)
Economizer Motorized
Damper Rain Hood
(on Outdoor
Air Compartment) Economizer/Motorized Damper
and Power Exhaust Rain Hood
Fixed
Outdoor Air
Intake Hood
(Located on
Return Air
Compartment) 1” Condensate
Drain (Must be
Trapped)
Detail “Y”
Unit with Rain Hoods

178113-BIM-D-0906
12 Unitary Products Group
Figure 8: ZW-15 thru -25 Roof Curb
Ductwork
Ductwork should be designed and sized according to the
methods in Manual D of the Air Conditioning Contractors of
America (ACCA) or as recommended by any other recognized
authority such as ASHRAE or SMACNA.
A closed return duct system should be used. This will not
preclude use of economizers or outdoor fresh air intake. The
supply and return air duct connections at the unit should be
made with flexible joints to minimize noise.
The supply and return air duct systems should be designed for
the CFM and static pressure requirements of the job. They
should NOT be sized to match the dimensions of the duct
connections on the unit.
Refer to Figure 5 for bottom air duct openings. Refer to Figure 6
for side air duct openings.
NOTE: It is recommended that, in Canada, the outlet duct be
provided with a removable access panel. It is
recommended that this opening be accessible when
the unit is installed in service, and of a size such that
smoke or reflected light may be observed inside the
casing to indicate the presence of leaks in the heat
exchanger. The cover should be attached in a
manner adequate to prevent leakage.
Fixed Outdoor Air Intake Damper
This damper is shipped inside the return air compartment. It is
completely assembled and ready for installation. A damper
baffle inside of the hood is adjustable to provide variable
amounts of outdoor air intake on units that are not provided with
an economizer or a motorized damper option. Refer to the
Fixed Outdoor Damper Figure 9.
Gasketing and mounting screws are provided in a parts bag
attached to the hood assembly. Apply gasketing to the three
flange surfaces on the hood prior to installing the hood. Extend
gasketing 1/4 inch beyond the top and bottom of the two side
flanges to insure adequate sealing.
Adjusting the damper to the desired air flow may be done
before mounting the hood into position or after installation by
removing the front hood panel or the screen on the bottom of
the hood. Damper baffle in position 1 will allow approximately
10% outdoor air flow, position 2 approximately 15% and, to
allow approximately 25%, remove the damper baffle.
On units with bottom return air application install the damper
assembly over the opening in the side return air access panel.
Remove and discard the opening cover and the covering over
the hood mounting holes (used for shipping) before installing.
Secure with the screws provided.
On units with side return air applications, install the damper
assembly on the return air ductwork as close to the unit as
possible. Cut an opening 16 inches high by 18 inches wide in the
ductwork to accommodate the damper. Using the holes in the
hood flanges as a template, drill 9/64 inch diameter (#26 drill)
holes into the ductwork and secure with the screws provided.
25-1/4"
If outdoor air intake will not be required on units with
bottom return air applications, the damper assembly
should still be mounted on the side return air access
panel, per the instructions above, to insure moisture is
not drawn into the unit during operation. The covering
over the mounting holes only need be removed. Do not
remove the opening cover.

178113-BIM-D-0906
Unitary Products Group 13
Figure 9: Fixed Outdoor Air Damper
Condensate Drain
Plumbing must conform to local codes. Use a sealing compound
on male pipe threads. Install a condensate drain line from the
one-inch NPT female connection on the unit to an open drain.
NOTE: The condensate drain operates in a negative pressure
in the cabinet. The condensate drain line MUST be
trapped to provide proper drainage. See Figure 10.
Figure 10: Condensate Drain
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.
Filters
Two-inch filters are supplied with each unit, but units can be
converted easily to four-inch filters. Filters must always be
installed ahead of the evaporator coil and must be kept clean or
replaced with same size and type. Dirty filters will reduce the
capacity of the unit and will result in frosted coils or safety
shutdown. Minimum filter area and required sizes are shown in
Physical Data Table 8.
This system uses R-410A Refrigerant which operates at
higher pressures than R-22. No other refrigerant may be
used in this system.
*
Side Supply
Air Access
Panel
Damper
Baffle
Hood
Screen
* Gasketed
Flange Rear View
Side Return Air
Access Panel
Outdoor Air
Opening Cover
2
1
Base
Pan
Base
Rails
Drain
Plug
2”
3” Min.
Unit Condensate
Connection
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.
Make sure that panel latches are properly positioned on
the unit to maintain an airtight seal.

178113-BIM-D-0906
14 Unitary Products Group
Power And Control Wiring
Field wiring to the unit, fuses, and disconnects must conform to
provisions of National Electrical Code (NEC), ANSI/NFPA No.
70 – Latest Edition (in U.S.A.), current Canadian Electrical
Code C221, and/or local ordinances. The unit must be
electrically grounded in accordance with NEC and CEC as
specified above and/or local codes.
Voltage tolerances which must be maintained at the
compressor terminals during starting and running conditions are
indicated on the unit Rating Plate and Table 1.
The internal wiring harnesses furnished with this unit are an
integral part of the design certified unit. Field alteration to
comply with electrical codes should not be required. If any of
the wire supplied with the unit must be replaced, replacement
wire must be of the type shown on the wiring diagram and the
same minimum gauge as the replaced wire.
A disconnect must be utilized for these units. Factory installed
disconnects are available. If installing a disconnect (field
supplied or UPG supplied accessory), refer to Figure 1 for the
recommended mounting location.
NOTE: Since not all local codes allow the mounting of a
disconnect on the unit, please confirm compliance with
local code before mounting a disconnect on the unit.
Electrical line must be sized properly to carry the load. USE
COPPER CONDUCTORS ONLY. Each unit must be wired with
a separate branch circuit fed directly from the meter panel and
properly fused.
Refer to Figures 11 and 12 for typical field wiring and to the
appropriate unit wiring diagram mounted inside control doors
for control circuit and power wiring information.
Power Wiring Detail
Units are factory wired for the voltage shown on the unit
nameplate. Refer to Electrical Data Table 7 to size power
wiring, fuses, and disconnect switch.
Power wiring is brought into the unit through the side of the unit
or the basepan inside the curb.
Figure 11: Field Wiring Disconnect - Cooling Unit With/Without Electric Heat
Avoid damage to internal components if drilling holes for
disconnect mounting.
When connecting electrical power and control wiring to
the unit, water-proof connectors must be used so that
water or moisture cannot be drawn into the unit during
normal operation. The above water-proofing conditions
will also apply when installing a field supplied disconnect
switch.
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178113-BIM-D-0906
Unitary Products Group 15
Thermostat Wiring
The thermostat should be located on an inside wall approximately
56 inch above the floor where it will not be subject to drafts, sun
exposure or heat from electrical fixtures or appliances. Follow the
manufacturer's instructions enclosed with thermostat for general
installation procedure. Seven (7) color-coded, insulated wires
should be used to connect the thermostat to the unit. Refer to
Table 6 for control wire sizing and maximum length.
Figure 12: Field Wiring 24 Volt Thermostat
Table 6: Control Wire Sizes
Wire Size Maximum Length1
1. From the unit to the thermostat and back to the unit.
18 AWG 150 Feet
OCC
C
RC
G
Y2
Y1
W2
W1
X
R
THERMOSTAT
TERMINALS
CONTROL
TERMINAL
BLOCK
TERMINALS ON
A LIMITED
NUMBER OF
THERMOSTATS
1
4
3
1
2
4
Second stage heating not required on single stage heating units.
Jumper is required if there is no Smoke Detector circuit.
Jumper is required for any combination of R, RC, or RH.
5
5
OCC is an output from the thermostat to indicate the Occupied condition.
X is an input to the thermostat to display Error Status conditions.
Y3
Y4
3
W2
Y1
G
OCC
P
P1
Y2
X
R
SD
C
EXPANSION
BOARD
TERMINAL
BLOCK
W1
Y3
Y4
2
C
SD
SD
R
Jumper
Smoke
Detector
24 VAC
Class 2

178113-BIM-D-0906
16 Unitary Products Group
Table 7: Electrical Data
ZW-15 thru -25 - Without Powered Convenience Outlet
Size
(Tons) Volt Compressors
(each)
OD Fan
Motors
(each)
Supply
Blower
Motor
Pwr
Conv
Motor Electric Heat Option MCA1
(Amps)
Max Fuse2/
Breaker3
Size
(Amps)
RLA LRA MCC FLA FLA FLA Model kW Stages Amps
-15
(15)
208-3-60 14.7 115 23.0 2.1 15.4 0.0
None---86.5100
E18 13.5 1 37.5 86.5 100
E36 27 2 74.9 112.9 125
E54 40.6 2 112.7 160.1 175
E72 54.1 2 150.2 169.4 200
230-3-60 14.7 115 23.0 2.1 14.4 0.0
None---85.390
E18 18.0 1 43.3 85.3 90
E36 36.0 2 86.6 126.3 150
E54 54.0 2 129.9 147.9 175
E72 72.0 2 173.2 191.2 225
460-3-60 7.7 50 12.0 1.1 7.2 0.0
None---44.350
E18 18.0 1 21.7 44.3 50
E36 36.0 2 43.3 63.1 70
E54 54.0 2 65.0 74.0 90
E72 72.0 2 86.6 95.6 110
575-3-60 6.4 40 10.0 0.9 5.9 0.0
None---36.740
E18 18.0 1 17.3 36.7 40
E36 36.0 2 34.6 50.7 60
E54 54.0 2 52.0 59.3 70
E72 72.0 2 69.3 76.7 90
-18
(17.5)
208-3-60 16.7 120 26.0 2.1 20.0 0.0
None - - - 100.2 110
E18 13.5 1 37.5 100.2 110
E36 27 2 74.9 118.7 125
E54 40.6 2 112.7 165.9 175
E72 54.1 2 150.2 175.2 200
230-3-60 16.7 120 26.0 2.1 20.0 0.0
None - - - 100.2 110
E18 18.0 1 43.3 100.2 110
E36 36.0 2 86.6 133.3 150
E54 54.0 2 129.9 154.9 175
E72 72.0 2 173.2 198.2 225
460-3-60 8.7 60 13.5 1.1 10.0 0.0
None---51.760
E18 18.0 1 21.7 51.7 60
E36 36.0 2 43.3 66.6 70
E54 54.0 2 65.0 77.5 90
E72 72.0 2 86.6 99.1 110
575-3-60 6.7 42 10.5 0.9 8.2 0.0
None---40.745
E18 18.0 1 17.3 40.7 45
E36 36.0 2 34.6 53.6 60
E54 54.0 2 52.0 62.2 70
E72 72.0 2 69.3 79.5 90
-20
(20)
208-3-60 17.9 120 28.0 3.7 20.0 0.0
None - - - 111.4 125
E18 13.5 1 37.5 111.4 125
E36 27 2 74.9 118.7 125
E54 40.6 2 112.7 165.9 175
E72 54.1 2 150.2 175.2 200
230-3-60 17.9 120 28.0 3.7 20.0 0.0
None - - - 111.4 125
E18 18.0 1 43.3 111.4 125
E36 36.0 2 86.6 133.3 150
E54 54.0 2 129.9 154.9 175
E72 72.0 2 173.2 198.2 225
460-3-60 9.6 70 15.0 1.9 10.0 0.0
None---58.560
E18 18.0 1 21.7 58.5 60
E36 36.0 2 43.3 66.6 70
E54 54.0 2 65.0 77.5 90
E72 72.0 2 86.6 99.1 110
575-3-60 7.4 53 11.5 1.5 8.2 0.0
None---45.950
E18 18.0 1 17.3 45.9 50
E36 36.0 2 34.6 53.6 60
E54 54.0 2 52.0 62.2 70
E72 72.0 2 69.3 79.5 90

178113-BIM-D-0906
Unitary Products Group 17
-25
(25)
208-3-60 23.0 160 31.5 3.7 38.6 0.0
None - - - 155.1 175
E18 13.5 1 37.5 155.1 175
E36 27 2 74.9 155.1 175
E54 40.6 2 112.7 189.1 200
E72 54.1 2 150.2 198.4 225
230-3-60 23.0 160 31.5 3.7 38.6 0.0
None - - - 155.1 175
E18 18.0 1 43.3 155.1 175
E36 36.0 2 86.6 156.5 175
E54 54.0 2 129.9 178.2 200
E72 72.0 2 173.2 221.5 250
460-3-60 12.2 87 17.1 1.9 19.3 0.0
None---80.590
E18 18.0 1 21.7 80.5 90
E36 36.0 2 43.3 80.5 90
E54 54.0 2 65.0 89.1 100
E72 72.0 2 86.6 110.7 125
575-3-60 8.7 62 13.5 1.5 15.4 0.0
None---60.170
E18 18.0 1 17.3 60.1 70
E36 36.0 2 34.6 62.6 70
E54 54.0 2 52.0 71.2 80
E72 72.0 2 69.3 88.5 100
1. Minimum Circuit Ampacity.
2. Dual Element, Time Delay Type.
3. HACR type per NEC.
ZW-15 thru -25 - Without Powered Convenience Outlet (Continued)
Size
(Tons) Volt Compressors
(each)
OD Fan
Motors
(each)
Supply
Blower
Motor
Pwr
Conv
Motor Electric Heat Option MCA1
(Amps)
Max Fuse2/
Breaker3
Size
(Amps)
RLA LRA MCC FLA FLA FLA Model kW Stages Amps

178113-BIM-D-0906
18 Unitary Products Group
ZW-15 thru -25 - With Powered Convenience Outlet
Size
(Tons) Volt Compressors
(each)
OD Fan
Motors
(each)
Supply
Blower
Motor
Pwr
Conv
Outlet Electric Heat Option MCA1
(Amps)
Max Fuse2/
Breaker3
Size
(Amps)
RLA LRA MCC FLA FLA FLA Model kW Stages Amps
-15
(15)
208-3-60 14.7 115 23.0 2.1 15.4 10.0
None - - - 96.5 110
E18 13.5 1 37.5 96.5 110
E36 27 2 74.9 125.4 150
E54 40.6 2 112.7 172.6 175
E72 54.1 2 150.2 181.9 200
230-3-60 14.7 115 23.0 2.1 14.4 10.0
None - - - 95.3 100
E18 18.0 1 43.3 95.3 100
E36 36.0 2 86.6 138.8 150
E54 54.0 2 129.9 160.4 175
E72 72.0 2 173.2 203.7 225
460-3-60 7.7 50 12.0 1.1 7.2 5.0
None - - - 49.3 50
E18 18.0 1 21.7 49.3 50
E36 36.0 2 43.3 69.4 70
E54 54.0 2 65.0 80.2 90
E72 72.0 2 86.6 101.9 110
575-3-60 6.4 40 10.0 0.9 5.9 4.0
None - - - 40.7 45
E18 18.0 1 17.3 40.7 45
E36 36.0 2 34.6 55.7 60
E54 54.0 2 52.0 64.3 70
E72 72.0 2 69.3 81.7 90
-18
(17.5)
208-3-60 16.7 120 26.0 2.1 20.0 10.0
None - - - 110.2 125
E18 13.5 1 37.5 110.2 125
E36 27 2 74.9 131.2 150
E54 40.6 2 112.7 178.4 200
E72 54.1 2 150.2 187.7 200
230-3-60 16.7 120 26.0 2.1 20.0 10.0
None - - - 110.2 125
E18 18.0 1 43.3 110.2 125
E36 36.0 2 86.6 145.8 150
E54 54.0 2 129.9 167.4 175
E72 72.0 2 173.2 210.7 225
460-3-60 8.7 60 13.5 1.1 10.0 5.0
None - - - 56.7 60
E18 18.0 1 21.7 56.7 60
E36 36.0 2 43.3 72.9 80
E54 54.0 2 65.0 83.7 90
E72 72.0 2 86.6 105.4 110
575-3-60 6.7 42 10.5 0.9 8.2 4.0
None - - - 44.7 50
E18 18.0 1 17.3 44.7 50
E36 36.0 2 34.6 58.6 60
E54 54.0 2 52.0 67.2 70
E72 72.0 2 69.3 84.5 90
-20
(20)
208-3-60 17.9 120 28.0 3.7 20.0 10.0
None - - - 121.4 125
E18 13.5 1 37.5 121.4 125
E36 27 2 74.9 131.2 150
E54 40.6 2 112.7 178.4 200
E72 54.1 2 150.2 187.7 200
230-3-60 17.9 120 28.0 3.7 20.0 10.0
None - - - 121.4 125
E18 18.0 1 43.3 121.4 125
E36 36.0 2 86.6 145.8 150
E54 54.0 2 129.9 167.4 175
E72 72.0 2 173.2 210.7 225
460-3-60 9.6 70 15.0 1.9 10.0 5.0
None - - - 63.5 70
E18 18.0 1 21.7 63.5 70
E36 36.0 2 43.3 72.9 80
E54 54.0 2 65.0 83.7 90
E72 72.0 2 86.6 105.4 110
575-3-60 7.4 53 11.5 1.5 8.2 4.0
None - - - 49.9 50
E18 18.0 1 17.3 49.9 50
E36 36.0 2 34.6 58.6 60
E54 54.0 2 52.0 67.2 70
E72 72.0 2 69.3 84.5 90

178113-BIM-D-0906
Unitary Products Group 19
-25
(25)
208-3-60 23.0 160 31.5 3.7 38.6 10.0
None - - - 165.1 200
E18 13.5 1 37.5 165.1 200
E36 27 2 74.9 165.1 200
E54 40.6 2 112.7 201.6 225
E72 54.1 2 150.2 210.9 225
230-3-60 23.0 160 31.5 3.7 38.6 10.0
None - - - 165.1 200
E18 18.0 1 43.3 165.1 200
E36 36.0 2 86.6 169.0 200
E54 54.0 2 129.9 190.7 225
E72 72.0 2 173.2 234.0 250
460-3-60 12.2 87 17.1 1.9 19.3 5.0
None - - - 85.5 100
E18 18.0 1 21.7 85.5 100
E36 36.0 2 43.3 85.5 100
E54 54.0 2 65.0 95.3 110
E72 72.0 2 86.6 117.0 125
575-3-60 8.7 62 13.5 1.5 15.4 4.0
None - - - 64.1 70
E18 18.0 1 17.3 64.1 70
E36 36.0 2 34.6 67.6 70
E54 54.0 2 52.0 76.2 90
E72 72.0 2 69.3 93.5 100
1. Minimum Circuit Ampacity.
2. Dual Element, Time Delay Type.
3. HACR type per NEC.
ZW-15 thru -25 - With Powered Convenience Outlet (Continued)
Size
(Tons) Volt Compressors
(each)
OD Fan
Motors
(each)
Supply
Blower
Motor
Pwr
Conv
Outlet Electric Heat Option MCA1
(Amps)
Max Fuse2/
Breaker3
Size
(Amps)
RLA LRA MCC FLA FLA FLA Model kW Stages Amps

178113-BIM-D-0906
20 Unitary Products Group
Table 8: ZW-15 thru -25 Physical Data
Component Models
ZW-15ZW-18ZW-20ZW-25
Nominal Tonnage 15 17.5 20 25
ARI COOLING PERFORMANCE
Gross Capacity @ ARI A point (Btu) 183500 213700 242000 312000
ARI net capacity (Btu) 178500 206000 235000 295000
EER 12.4 12.1 11.6 10.4
SEER - - - -
IPLV 13.9 13.2 12.9 10.6
Nominal CFM 6000 7000 8000 10000
System power (KW) 14.40 17.10 20.10 28.50
Refrigerant type R-410A R-410a R-410a R-410a
Refrigerant charge (lb-oz)
System 1 12-8 12-8 12-0 12-8
System 2 12-8 13-8 12-0 13-8
System 3 12-8 12-8 12-0 13-0
System 4 12-8 12-8 12-0 12-8
ARI HEATING PERFORMANCE
Heating model 24 32 24 32 24 32 24 32
Heat input (K Btu) 300 400 300 400 300 400 300 400
Heat output (K Btu) 240 320 240 320 240 320 240 320
AFUE% --------
Steady state efficiency (%) 80 80 80 80 80 80 80 80
No.burners 68686868
No. stages 22222222
Temperature Rise Range (ºF) 20-50 30-60 20-50 30-60 20-50 30-60 20-50 30-60
Gas Limit Setting (ºF) 195 195 195 195 195 195 195 195
Gas piping connection (in.) 11111111
DIMENSIONS (inches)
Length 92 92 92 92
Width 66-1/2 66-1/2 66-1/2 66-1/2
Height 45-7/8 45-7/8 45-7/8 45-7/8
OPERATING WT. (lbs.) 2609 2665 2697 2783
COMPRESSORS
Type Scroll Scroll Scroll Scroll
Quantity 4 4 4 4
Unit Capacity Steps (%) 25 / 50 / 75 / 100 25 / 50 / 75 / 100 25 / 50 / 75 / 100 25 / 50 / 75 / 100
CONDENSER COIL DATA
Face area (Sq. Ft.) 63.8 63.8 63.8 63.8
Rows 2222
Fins per inch 20 20 20 20
Tube diameter (in.) 3/8 3/8 3/8 3/8
Circuitry Type Split-face Split-face Split-face Split-face
EVAPORATOR COIL DATA
Face area (Sq. Ft.) 25 25 25 25
Rows 4444
Fins per inch 13.5 13.5 13.5 13.5
Tube diameter 0.375 0.375 0.375 0.375
Circuitry Type Split-face Split-face Split-face Split-face
Refrigerant control TXV TXV TXV TXV
CONDENSER FAN DATA
Quantity 4 4 4 4
Fan diameter (Inch) 24 24 30 30