Johnson Controls DW-12 User manual

INSTALLATION
MANUAL
CAUTION: READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
66389-BIM-C-1208
CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . .4
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
REFERENCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . .5
APPROVALS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . .6
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
START-UP (COOLING). . . . . . . . . . . . . . . . . . . . . .38
START-UP (GAS HEAT). . . . . . . . . . . . . . . . . . . . .38
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . .41
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.
Tested in accordance with:
SINGLE PACKAGE AIR CONDITIONERS AND
SINGLE PACKAGE GAS/ELECTRIC UNITS
DW-12
12-1/2 TON
(11.35 EER)

66389-BIM-C-1208
2Johnson Controls Unitary Products
TABLE OF CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
RENEWAL PARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
INSTALLATION SAFETY INFORMATION . . . . . . . . . . . . . . . 7
PRECEDING INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 7
LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
RIGGING AND HANDLING . . . . . . . . . . . . . . . . . . . . . . . . . . 9
CLEARANCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
DUCTWORK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
DUCT COVERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
CONDENSATE DRAIN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
COMPRESSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
THERMOSTAT WIRING. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
POWER AND CONTROL WIRING. . . . . . . . . . . . . . . . . . . . 15
POWER WIRING DETAIL. . . . . . . . . . . . . . . . . . . . . . . . . . . 16
OPTIONAL ELECTRIC HEAT. . . . . . . . . . . . . . . . . . . . . . . . 20
OPTIONAL GAS HEAT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
GAS PIPING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
GAS CONNECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
LP UNITS, TANKS AND PIPING . . . . . . . . . . . . . . . . . . . . . . .22
VENT AND COMBUSTION AIR. . . . . . . . . . . . . . . . . . . . . . . .23
FACTORY INSTALLED OPTIONS/
FIELD INSTALLED ACCESSORIES . . . . . . . . . . . . . . . . . . 23
ELECTRIC HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
MOTORIZED OUTDOOR DAMPER . . . . . . . . . . . . . . . . . . . .23
ECONOMIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
POWER EXHAUST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
RAIN HOOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
ECONOMIZER AND POWER EXHAUST SET POINT
ADJUSTMENTS AND INFORMATION. . . . . . . . . . . . . . . . . 24
MINIMUM POSITION ADJUSTMENT . . . . . . . . . . . . . . . . . . .24
ENTHALPY SET POINT ADJUSTMENT . . . . . . . . . . . . . . . . .24
POWER EXHAUST DAMPER SET POINT (WITH OR
WITHOUT POWER EXHAUST). . . . . . . . . . . . . . . . . . . . . . . .24
INDOOR AIR QUALITY AQ . . . . . . . . . . . . . . . . . . . . . . . . . . .24
PHASING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
BLOWER ROTATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
BELT TENSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
AIR BALANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
CHECKING AIR QUANTITY. . . . . . . . . . . . . . . . . . . . . . . . . 30
METHOD ONE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
METHOD TWO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
SUPPLY AIR DRIVE ADJUSTMENT . . . . . . . . . . . . . . . . . . 31
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
SEQUENCE OF OPERATIONS OVERVIEW. . . . . . . . . . . . 32
COOLING SEQUENCE OF OPERATION . . . . . . . . . . . . . . 32
CONTINUOUS BLOWER. . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
INTERMITTENT BLOWER. . . . . . . . . . . . . . . . . . . . . . . . . . . .32
NO OUTDOOR AIR OPTIONS. . . . . . . . . . . . . . . . . . . . . . . . .33
ECONOMIZER WITH SINGLE ENTHALPY SENSOR -. . . . . .33
ECONOMIZER WITH DUAL ENTHALPY SENSORS - . . . . . .33
ECONOMIZER (SINGLE OR DUAL) WITH POWER
EXHAUST -. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
MOTORIZED OUTDOOR AIR DAMPERS - . . . . . . . . . . . . . . 33
COOLING OPERATION ERRORS. . . . . . . . . . . . . . . . . . . . . 33
HIGH-PRESSURE LIMIT SWITCH. . . . . . . . . . . . . . . . . . . . . 33
LOW-PRESSURE LIMIT SWITCH . . . . . . . . . . . . . . . . . . . . . 34
FREEZESTAT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
LOW AMBIENT COOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
SAFETY CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
COMPRESSOR PROTECTION. . . . . . . . . . . . . . . . . . . . . . 34
FLASH CODES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
ELECTRIC HEATING SEQUENCE OF OPERATIONS. . . . 34
ELECTRIC HEATING OPERATION ERRORS . . . . . . . . . . 35
TEMPERATURE LIMIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
LIMIT SWITCH (LS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
FLASH CODES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
ELECTRIC HEAT ANTICIPATOR SETPOINTS. . . . . . . . . . 35
GAS HEATING SEQUENCE OF OPERATIONS . . . . . . . . . 35
IGNITION CONTROL BOARD . . . . . . . . . . . . . . . . . . . . . . . 35
FIRST STAGE OF HEATING . . . . . . . . . . . . . . . . . . . . . . . . . 35
SECOND STAGE OF HEATING. . . . . . . . . . . . . . . . . . . . . . . 36
RETRY OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
RECYCLE OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
GAS HEATING OPERATION ERRORS. . . . . . . . . . . . . . . . 36
LOCK-OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
TEMPERATURE LIMIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
FLAME SENSE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
GAS VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
SAFETY CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
LIMIT SWITCH (LS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
AUXILIARY LIMIT SWITCH (ALS) . . . . . . . . . . . . . . . . . . . . . 37
PRESSURE SWITCH (PS). . . . . . . . . . . . . . . . . . . . . . . . . . . 37
ROLLOUT SWITCH (ROS). . . . . . . . . . . . . . . . . . . . . . . . . . . 37
INTERNAL MICROPROCESSOR FAILURE . . . . . . . . . . . . . 37
FLASH CODES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
RESETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
GAS HEAT ANTICIPATOR SETPOINTS. . . . . . . . . . . . . . . 37
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
PRESTART CHECK LIST . . . . . . . . . . . . . . . . . . . . . . . . . . 38
OPERATING INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . 38
POST START CHECK LIST. . . . . . . . . . . . . . . . . . . . . . . . . 38
START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . . . . . . 38
PRE-START CHECK LIST. . . . . . . . . . . . . . . . . . . . . . . . . . 38
OPERATING INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . 38
LIGHTING THE MAIN BURNERS. . . . . . . . . . . . . . . . . . . . . . 38
POST START CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . 38
SHUT DOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
MANIFOLD GAS PRESSURE ADJUSTMENT. . . . . . . . . . . 39
CHECKING GAS INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
NATURAL GAS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
ADJUSTMENT OF TEMPERATURE RISE . . . . . . . . . . . . . 40
BURNERS/ORIFICES INSPECTION/SERVICING . . . . . . . 40
CHARGING THE UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
DW FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
UNIT CONTROL BOARD OPTION SETUP . . . . . . . . . . . 43
OPTION BYTE SETUP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
HEAT DELAY SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
COOLING TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . 47
GAS HEAT TROUBLESHOOTING GUIDE . . . . . . . . . . . . . 50

66389-BIM-C-1208
Johnson Controls Unitary Products 3
LIST OF FIGURES
Fig. # Pg. #
1 UNIT SHIPPING BRACKET . . . . . . . . . . . . . . . . . . . . . 7
2 COMPRESSOR SECTION . . . . . . . . . . . . . . . . . . . . . . 7
3 DW-12 COMPONENT LOCATION . . . . . . . . . . . . . . . . 8
4 UNIT 4 POINT LOAD . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 UNIT 6 POINT LOAD . . . . . . . . . . . . . . . . . . . . . . . . . 10
6 UNIT CENTER OF GRAVITY . . . . . . . . . . . . . . . . . . . 10
7 UNIT DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8 BOTTOM DUCT OPENINGS (FROM ABOVE) . . . . . 12
9 REAR DUCT DIMENSIONS . . . . . . . . . . . . . . . . . . . . 13
10 ROOF CURB DIMENSIONS. . . . . . . . . . . . . . . . . . . . 14
11 TRANSITION ROOF CURBS . . . . . . . . . . . . . . . . . . . 14
12 SIDE PANELS WITH HOLE PLUGS . . . . . . . . . . . . . 14
13 RETURN DOWNFLOW PLENUM WITH PANEL . . . . 15
14 DISCHARGE PANEL IN PLACE. . . . . . . . . . . . . . . . . 15
15 CONDENSATE DRAIN . . . . . . . . . . . . . . . . . . . . . . . . 15
16 TYPICAL ELECTRONIC THERMOSTAT FIELD
WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
17 TYPICAL FIELD WIRING 24 VOLT THERMOSTAT . 17
Fig. # Pg. #
18 FIELD WIRING DISCONNECT - COOLING UNIT
WITH/WITHOUT ELECTRIC HEAT . . . . . . . . . . . . . . 17
19 FIELD WIRING DISCONNECT - COOLING UNIT
WITH GAS HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
20 SIDE ENTRY GAS PIPING . . . . . . . . . . . . . . . . . . . . 21
21 BOTTOM ENTRY GAS PIPING . . . . . . . . . . . . . . . . . 21
22 ENTHALPY SET POINT CHART . . . . . . . . . . . . . . . . 25
23 HONEYWELL ECONOMIZER CONTROL W7212. . . 25
24 BELT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . 26
25 DRY COIL DELTA P. . . . . . . . . . . . . . . . . . . . . . . . . . 31
26 TYPICAL FLAME . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
27 TYPICAL GAS VALVE . . . . . . . . . . . . . . . . . . . . . . . . 40
28 CHARGING CHART. . . . . . . . . . . . . . . . . . . . . . . . . . 41
29 UNIT CONTROL BOARD. . . . . . . . . . . . . . . . . . . . . . 43
30 BASIC TROUBLESHOOTING FLOWCHART . . . . . . 45
31 POWER ON FLOW CHART. . . . . . . . . . . . . . . . . . . . 45
32 TRIP FAILURE FLOW CHART. . . . . . . . . . . . . . . . . . 46
LIST OF TABLES
Tbl. # Pg. #
1 UNIT VOLTAGE LIMITATIONS. . . . . . . . . . . . . . . . . . . 9
2UNIT TEMPERATURE LIMITATIONS 9
3 6 POINT LOAD WEIGHT. . . . . . . . . . . . . . . . . . . . . . . 10
4 UNIT WEIGHTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5 4 POINT LOAD WEIGHT. . . . . . . . . . . . . . . . . . . . . . . 10
6 UNIT CLEARANCES. . . . . . . . . . . . . . . . . . . . . . . . . . 11
7 CONTROL WIRE SIZES . . . . . . . . . . . . . . . . . . . . . . . 15
8 ELECTRICAL DATA DW-12 (12-1/2 TON) WITHOUT
POWERED CONVENIENCE OUTLET . . . . . . . . . . . . 19
9 ELECTRICAL DATA DW-12 (12-1/2 TON) WITH
POWERED CONVENIENCE OUTLET . . . . . . . . . . . . 19
10 PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
11 MINIMUM SUPPLY AIR CFM . . . . . . . . . . . . . . . . . . . 20
12 GAS HEAT APPLICATION DATA . . . . . . . . . . . . . . . . 21
13 GAS PIPE SIZING - CAPACITY OF PIPE. . . . . . . . . . 21
14 SUPPLY AIR LIMITATIONS . . . . . . . . . . . . . . . . . . . . 26
15 DW-12, 12-1/2 TON STANDARD MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . . . . . . 27
16 DW-12, 12-1/2 TON OPTIONAL MOTOR DOWN SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . . . . . . 27
Tbl. # Pg. #
17 DW-12, 12-1/2 TON STANDARD MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . . . . . 28
18 DW-12, 12-1/2 TON OPTIONAL MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . . . . . 28
19 INDOOR BLOWER SPECIFICATIONS . . . . . . . . . . . 29
20 POWER EXHAUST SPECIFICATIONS . . . . . . . . . . . 29
21 ADDITIONAL STATIC RESISTANCE. . . . . . . . . . . . . 32
22 MOTOR SHEAVE DATUM DIAMETERS . . . . . . . . . . 32
23 ELECTRIC HEAT LIMIT SETTING . . . . . . . . . . . . . . . 35
24 ELECTRIC HEAT ANTICIPATOR SETPOINTS . . . . . 35
25 GAS HEAT LIMIT CONTROL SETTINGS . . . . . . . . . 37
26 GAS HEAT ANTICIPATOR SETPOINTS . . . . . . . . . . 37
27 GAS HEAT STAGES. . . . . . . . . . . . . . . . . . . . . . . . . . 39
28 GAS RATE CUBIC FEET PER HOUR . . . . . . . . . . . . 40
29 UNIT CONTROL BOARD FLASH CODES . . . . . . . . . 42
30 HEAT DELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
31 IGNITION CONTROL FLASH CODES . . . . . . . . . . . . 44

66389-BIM-C-1208
4Johnson Controls Unitary Products
GENERAL
UP DW units are single package air conditioners with optional
gas heating designed for outdoor installation on a rooftop or
slab and for non-residential use. These units can be
equipped with factory or field installed electric heaters for
heating applications.
These units are completely assembled on rigid, permanently
attached base rails. All piping, refrigerant charge, and electri-
cal wiring is factory installed and tested. The units require
electric power, gas supply (where applicable), and duct con-
nections. The electric heaters have nickel-chrome elements
and utilize single-point power connection.
SAFETY CONSIDERATIONS
Due to system pressure, moving parts, and electrical compo-
nents, 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 clean-
ing coils and filters and replacing filters.
Observe all precautions in the literature, labels, and tags
accompanying the equipment whenever working on air condi-
tioning equipment. Be sure to follow all other applicable
safety precautions and codes including ANSI Z223.1 or CSA-
B149.1- latest edition.
Wear safety glasses and work gloves. Use quenching cloth
and have a fire extinguisher available during brazing opera-
tions.
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.
Should overheating occur, or the gas supply fail to
shut off, shut off the manual gas valve to the furnace
before shutting off the electrical supply.
Do not use this furnace if any part has been under
water. Immediately call a qualified service technician
to inspect the furnace and to replace any part of the
control system and any gas control which has been
under water.
If the information in this manual is not followed
exactly, a fire or explosion may result causing prop-
erty 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 neigh-
bor’s phone. Follow the gas supplier’s instruc-
tions.
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 sup-
plier.
This furnace is not to be used for temporary heating
of buildings or structures under construction.
Before performing service or maintenance opera-
tions on unit, turn off main power switch to unit. Elec-
trical shock could cause personal injury. Improper
installation, adjustment, alteration, service or main-
tenance can cause injury or property damage. Refer
to this manual. For assistance or additional informa-
tion consult a qualified installer, service agency or
the gas supplier.

66389-BIM-C-1208
Johnson Controls Unitary Products 5
REFERENCE
Additional information is available in the following reference
forms:
• Technical Guide - DW-12, 262776
• General Installation - DW-12, 66389
• Pre-start & Post-start Check List
• Economizer Accessory -
Downflow Factory Installed
Downflow Field Installed
Horizontal Field Installed
• Motorized Outdoor Air Damper
• Manual Outdoor Air Damper (0-100%)
• Manual Outdoor Air Damper (0-35%)
• Gas Heat Propane Conversion Kit
• Gas Heat High Altitude Kit (Natural Gas)
• Gas Heat High Altitude Kit (Propane)
• –60°F Gas Heat Kit
• Electric Heater Accessory
• Unit Renewal Parts List
RENEWAL PARTS
Contact your local UP 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 supple-
mental electric heat or a forced air furnace.
2. For outdoor installation only.
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 cov-
ering materials.
4. For use with natural gas (convertible to LP with kit).
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.
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.
Incorrect installation may create a condition where the
operation of the product could cause personal injury
or property damage.

66389-BIM-C-1208
6Johnson Controls Unitary Products
NOMENCLATURE
D W -12 N18 A T A AA 3 0 1 2 4 A
D = A/C, Single Pkg., R-22
Product Category
A = Std. Motor
Airflow
B = Std. Motor/Econo./Barometric Relief (Downflow
Only)
C = Std. Motor/Econo./Power Exhaust (Downflow Only)
D = Std. Motor/Motorized Damper (Downflow Only)
E = Std. Motor/Horizontal Economizer (No Baro.)
F = Std. Motor/Slab Econo./Power Exhaust
(Downflow Only)
G = Std. Motor/Slab Econo./Barometric Relief
(Downflow Only)
N = Hi Static
P = Hi Static/Econo./Barometric Relief
(Downflow Only)
Q = Hi Static/Econo./Power Exhaust
(Downflow Only)
R = Hi Static/Motorized Damper (Downflow Only)
S = Hi Static/Horizontal Economizer (No Baro.)
T = Hi Static/Slab Econo./Power Exhaust
(Downflow Only)
U = Hi Static/Slab Econo./Barometric Relief
(Downflow only)
Product Generation
4 = Fourth Generation
C00 = Cooling Only. No heat installed
Heat Type and Nominal Heat Capacity
N18 = 180 MBH Input Aluminized Steel
N24 = 240 MBH Input Aluminized Steel
S18 = 180 MBH Input Stainless Steel
S24 = 240 MBH Input Stainless Steel
E18 = 18 KW
E24 = 24 KW
E36 = 36 KW
E54 = 54 KW
Gas Heat Options
Electric Heat Options
Nominal Cooling Capacity
-12 = 12.5 Ton
Product Identifier
W = 12.5 Ton 11.3 EER A/C
Voltage
T = 208/230-3-60
W = 460-3-60
X = 575-3-60
Product Style
A = Style A
B = Style B
C = Style C
A = No Options Installed
Installation Options
B = Option 1
C = Option 2
D = Options 1 & 2
E = Option 3
F = Option 4
G = Options 1 & 3
H = Options 1 & 4
J = Options 1, 2 & 3
K = Options 1, 2, & 4
L = Options 1,3 & 4
M = Options 1, 2, 3, & 4
N = Options 2 & 3
P = Options 2 & 4
Q = Options 2, 3, & 4
R = Options 3 & 4
S = Option 5
T = Options 1 & 5
U = Options 1, 3, & 5
V = Options 1, 4, & 5
W = Options 1, 3, 4, & 5
X = Options 3 & 5
Y = Options 4 & 5
Z = Options 3, 4 & 5
1 = Disconnect
2 = Non-Pwr'd Conv. Outlet
3 = Smoke Detector S.A.
4 = Smoke Detector R.A.
5 = Pwr'd Conv. 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
BAS Ready Unit with Economizer
Shipping Bag
Any Combination of Additional Options that Don’t Have an Option Code Pre-assigned
AA = None
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
Additional Options
TA = Technicoat Condenser Coil
TJ = Technicoat Evaporator Coil
TS = Technicoat Evaporator & Condenser Coils
12.5 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.

66389-BIM-C-1208
Johnson Controls Unitary Products 7
INSTALLATION
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 with instructions to
retain them for future reference.
1. Refer to the furnace rating plate for the approved type of
gas for this furnace.
2. Install this furnace only in a location and position as
specified on Page 9 of these instructions.
3. Never test for gas leaks with an open flame. Use commer-
cially available soap solution made specifically for the
detection of leaks when checking all connections, as spec-
ified on Pages 7, 22, 23 and 38 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 40 of these instructions.
5. This equipment is not to be used for temporary heating
of buildings or structures under construction.
PRECEDING INSTALLATION
1. Remove the two screws holding the brackets in the front,
rear and compressor side fork-lift slots.
2. Turn each bracket toward the ground and the protective
plywood covering will drop to the ground.
3. Remove the condenser coil external protective covering
prior to operation.
4. Remove the toolless doorknobs and instruction packet
prior to installation.
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
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 specifi-
cally 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.
FIGURE 1 - UNIT SHIPPING BRACKET
Bracket
Screws Turn down
FIGURE 2 - COMPRESSOR SECTION
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 mechani-
cal 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 sup-
ply piping system at test pressures equal to or less
than 1/2 PSIG.
Toolless
Doorknobs
Installation
Instruction
Packet

66389-BIM-C-1208
8Johnson Controls Unitary Products
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 Tables 1 & 2 for unit application data.
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 build-
ings or structures under construction.
.
The Simplicity® control board used in this product
will effectively operate the cooling system down to
0°F when this product is applied in a comfort cooling
application for people. An economizer is typically
included in this type of application. When applying
this product for process cooling applications (com-
puter rooms, switchgear, etc.), please reference
applications bulletin AE-011-07 or call the applica-
tions department for Unitary Products @ 1-877-
UPG-SERV for guidance. Additional accessories
may be needed for stable operation at temperatures
below 30° F.
FIGURE 3 - DW-12 COMPONENT LOCATION
Simplicity™ Control
board w/screw
connectors for T-stat
wiring and Network
Connection
Disconnect
location (optional
disconnect switch)
Filter access
(2" throw-away)
Filter drier (solid core)
Condenser Section
Belt-drive blower
motor
Slide out motor
and blower
assembly for easy
adjustment and
service
Power ventor
motor
20-gauge
aluminized steel
tubular heat
exchanger for
long life
(stainless steel
option)
Two-stage gas heating to
maintain warm,
comfortable temperature
Intelligent control
board for safe and
ecient operation
Slide-out drain pan
with steel ¾" NPT
female connection
Compressor #1 access
(high-eciency
compressor w/crankcase
heater)
Side entry power
and control wiring
knockouts
Toolless door
latch
Roof curbs in eight-and
fourteen-inch heights.
Roof curbs for
transitioning from DHB/
DHC/DUS footprint to the
DU/DL/DW Series
footprint are available
(eld-installed accessory)
Base rails w/
forklift slots
( three sides)
and lifting
holes
Compressor #2
access
(high-eciency
compressor w/
crankcase heater)
Dual stage cooling
for maximum
comfort
Second model
nameplate inside
hinged access panel

66389-BIM-C-1208
Johnson Controls Unitary Products 9
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.
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.
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 60
INCHES.
TABLE 1: UNIT VOLTAGE LIMITATIONS
Power Rating1
1. Utilization range “A” in accordance with ARI Standard 110.
Minimum Maximum
208/230-3-60 187 252
460-3-60 432 504
575-3-60 540 630
TABLE 2: UNIT TEMPERATURE LIMITATIONS
Temperature Min. Max.
Wet Bulb Temperature (°F) of Air on
Evaporator Coil 57 72
Dry Bulb Temperature (°F) of Air on
Condenser Coil 01
1. A low ambient accessory is available for operation
down to -20°F.
125
Excessive exposure of this furnace to contaminated
combustion air may result in equipment damage or
personal injury. Typical contaminates include: per-
manent wave solution, chlorinated waxes and clean-
ers, chlorine based swimming pool chemicals, water
softening chemicals, carbon tetrachloride, Halogen
type refrigerants, cleaning solvents (e.g. perchloro-
ethylene), printing inks, paint removers, varnishes,
hydrochloric acid, cements and glues, antistatic fab-
ric softeners for clothes dryers, masonry acid wash-
ing materials.
If a unit is to be installed on a roof curb other than a
UP roof curb, gasketing must be applied to all sur-
faces that come in contact with the unit underside.
Before lifting, make sure the unit weight is distrib-
uted 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 rig-
ging cable damage with plywood or other suitable
material.
FIGURE 4 - UNIT 4 POINT LOAD
AB
D
C
LEFT
FRONT

66389-BIM-C-1208
10 Johnson Controls Unitary Products
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 6 for clearances required
for combustible construction, servicing, and proper unit oper-
ation.
TABLE 3: UNIT WEIGHTS
Model DW-12 Shipping
Weight (lb.) Operating
Weight (lb.)
Cooling Unit Only 1495 1480
w/Economizer 85 84
w/Power Exhaust 150 148
w/Gas Heat1110 110
w/Electric Heat249 49
1. 8 Tube Heat Exchanger
2. 54 kW heater
TABLE 4: 4 POINT LOAD WEIGHT
Model Location (lbs.)1
ABCD
DW-12 282 359 468 371
1. Weights include largest gas heat option.
TABLE 5: 6 POINT LOAD WEIGHT
Model Location (lbs.)1
1. Weights include largest gas heat option.
ABCDEF
DW-12 184 210 246 323 275 242
FIGURE 5 - UNIT 6 POINT LOAD
FIGURE 6 - UNIT CENTER OF GRAVITY
AB
C
F
E
D
LEFT
FRONT
60" 25-½"
LEFT FRONT
Do not permit overhanging structures or shrubs to
obstruct condenser air discharge outlet, combustion
air inlet or vent outlets.
Excessive exposure to contaminated combustion air
will result in safety and performance related prob-
lems. To maintain combustion air quality, the recom-
mended source of combustion air is the outdoor air
supply. The outdoor air supplied for combustion
should be free from contaminants due to chemical
exposure that may be present from the following
sources.
• Commercial buildings
• Indoor pools
• Laundry rooms
• Hobby or craft rooms
• Chemical storage areas
The following substances should be avoided to
maintain outdoor combustion air quality.
• Permanent wave solutions
• Chlorinated waxes and cleaners
• Chlorine based swimming pool cleaners
• Water softening chemicals
• De-icing salts or chemicals
• Carbon tetrachloride
• Halogen type refrigerants
• Cleaning solvents (such as perchloroethylene)
• Printing inks, paint removers, varnishes, etc.
• Hydrochloric acid
• Cements and glues
• Anti-static fabric softeners for clothes dryers
• Masonry acid washing materials

66389-BIM-C-1208
Johnson Controls Unitary Products 11
NOTE: A one-inch clearance must be provided between
any combustible material and the supply ductwork
for a distance of 3 feet from the unit.
NOTE: If the unit includes gas heating, locate the unit so
the flue exhaust is at least:
• Three (3) feet above any forced air inlet located within 10
horizontal feet (excluding those integral to the unit).
• Four (4) feet below, four (4) horizontal feet from, or one
(1) foot above any door or gravity air inlet into the build-
ing.
• Four (4) feet from electric meters, gas meters, regula-
tors, and relief equipment.
.
FIGURE 7 - UNIT DIMENSIONS
11-1/2
89
27
59
50-3/4
30-11/32
4-1/4
6-3/16
17-3/16
24-3/16
30-3/16
119-7/16
Convenience
Outlet
Convenience
Outlet Power
Entry 7/8
For Gas Pipe Entry
see DETAIL A
For Baserail
Dimensions
see
DETAIL B
FRONT
LEFT
Power
Entry
2-1/2
Control
Entry
7/8
For Drain Dimensions
see DETAIL C
TABLE 6: UNIT CLEARANCES
Top1
1. Units must be installed outdoors. Overhanging struc-
ture or shrubs should not obstruct condenser air dis-
charge outlet.
72” Right 12”
Front2
2. The products of combustion must not be allowed to
accumulate within a confined space and re-circulate.
36” Left 36”
Rear3
3. To remove the slide-out drain pan, a rear clearance of
sixty inches is required. If space is unavailable, the
drain pan can be removed through the front by separat-
ing the corner wall.
36” Bottom4
4. Units may be installed on combustible floors made from
wood or class A, B or C roof covering materials.
0”
5 - 1 / 4 B a s e
P a n
1 7 - 1 3 / 1 6
V i e w o f W a l l A c r o s s f r o m C o i l
G a s P i p e I n l e
DETAIL A
3 - 3 / 4
3 - 9 / 1 6
2 - 3 / 8
DETAIL
B
5 - 3 / 8
DETAIL C

66389-BIM-C-1208
12 Johnson Controls Unitary Products
FIGURE 8 - BOTTOM DUCT OPENINGS (FROM ABOVE)
Return
Air
Supply
Air
32-11/16
6-13/16
6-13/16 6-13/16
21-3/16
19-3/16
17-3/16
7-1/8
14-23/32
16-3/8
18-1/16
19-5/8
63-1/2
27-1/2
18
24
21
12-5/16
LEFT
FRONT
Bottom
Condensate
Drain
Bottom
Power, Control and
Convenience Outlet
Wiring Entries
Bottom
Gas Supply Entry

66389-BIM-C-1208
Johnson Controls Unitary Products 13
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 recog-
nized 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 8 for bottom air duct openings. Refer to Fig-
ure 9 for rear air duct openings.
DUCT COVERS
Units are shipped with the side duct openings covered and a
covering over the bottom of the unit. For bottom duct applica-
tion, no duct cover changes are necessary. For side duct
application, remove the side duct covers and install over the
bottom duct openings. The panels removed from the side
duct connections are designed to be reused by securing each
panel to its respective downflow opening. But keep in mind
that the supply panel is installed with the painted surface UP,
facing the heat exchanger, while the return panel is installed
with the painted surface DOWN, facing the downflow duct
opening. The supply panel is secured with the bracket
(already in place from the factory) and two screws. It’s a snug
fit for the panel when sliding it between the heat exchanger
and unit bottom, but there is room. The return panel is
secured with four screws.
FIGURE 9 - REAR DUCT DIMENSIONS
Return
Air
Supply
Air
18-1/4
18-1/4
28-1/4
31-11/16
28-1/4
18-1/16
2-31/32
5-5/32
Dot
Plugs

66389-BIM-C-1208
14 Johnson Controls Unitary Products
Note orientation. Panel is “insulation” side up.
FIGURE 10 - ROOF CURB DIMENSIONS
FIGURE 11 - TRANSITION ROOF CURBS
8 o r 1 4
5 0 - 1 / 2
3 0
2 0
2 0
8 0 - 5 / 8
6
2 T Y P .
I N S U L A T E D D E C K U N D E R
C O M P R E S S O R S E C T I O N
I N S U L A T E D D E C K U N D E R
C O N D E N S E R S E C T I O N
F R O N T
R I G H T
S U P P L Y
R E T U R N
7 6 - 5 / 8
9 4
5 0 - 1 / 2 3 0 - 1 / 2
6 4 - 1 / 4
5 9 - 1 / 4
1 0
2 3 4
2 6 8 0 - 5 / 8
2 T Y P
F R O N T R I G H T
S U P P L Y
R E T U R N
When fastening ductwork to side duct flanges on
unit, insert screws through duct flanges only. DO
NOT insert screws through casing. Outdoor duct-
work must be insulated and water-proofed.
FIGURE 12 - SIDE PANELS WITH HOLE PLUGS

66389-BIM-C-1208
Johnson Controls Unitary Products 15
CONDENSATE DRAIN
The side condensate drain is reversible and maybe re-ori-
ented to the rear of the cabinet to facilitate condensate pip-
ing. A condensate drain connection is available through the
base pan for piping inside the roof curb. Trap the connection
per Figure 15. The trap and drain lines should be protected
from freezing.
Plumbing must conform to local codes. Use a sealing com-
pound on male pipe threads. Install condensate drain line
from the 3/4 inch NPT female connection on the unit to an
open drain.
COMPRESSORS
The compressors are mounted on elastomer insulators. The
mounting bolts have been fully tightened for shipping.
FILTERS
Two-inch filters are supplied with each unit. One-inch filters
may be used with no modification to the filter racks. Filters
must always be installed ahead of evaporator coil and must
be kept clean or replaced with same size and type. Dirty fil-
ters reduce the capacity of the unit and result in frosted coils
or safety shutdown. All units use four (4) 20”x25”x2” filters.
The unit should not be operated without filters properly
installed.
THERMOSTAT WIRING
The thermostat should be located on an inside wall approxi-
mately 56 inch above the floor where it will not be subject to
drafts, sun exposure or heat from electrical fixtures or appli-
ances. Follow the manufacturer's instructions enclosed with
thermostat for general installation procedure. Seven (7) color-
coded, insulated wires should be used to connect the thermo-
stat to the unit. Refer to Table 7 for control wire sizing and
maximum length.
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 Electri-
cal 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 com-
pressor terminals during starting and running conditions are
indicated on the unit Rating Plate and Table 1.
FIGURE 13 - RETURN DOWNFLOWPLENUM WITH
PANEL
FIGURE 14 - DISCHARGE PANEL IN PLACE
FIGURE 15 - CONDENSATE DRAIN
O P T I O N A L C O I L
G U A R D
3 " M i n i m u m
Do not loosen the compressor mounting bolts.
Make sure that panel latches are properly positioned
on the unit to maintain an airtight seal.
TABLE 7: CONTROL WIRE SIZES
Wire Size Maximum Length1
1. From the unit to the thermostat and back to the unit.
18 AWG 150 Feet

66389-BIM-C-1208
16 Johnson Controls Unitary Products
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 UP supplied accessory), refer to Figure 3 for
the recommended mounting location.
NOTE: Since not all local codes allow the mounting of a dis-
connect 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 16, 17 and 18 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 Tables 8 and 9 to size
power wiring, fuses, and disconnect switch.
208/230-3-60 and 380/415-3-50 units control
transformers are factory wired for 230v and
415v power supply respectively. Change tap
on transformer for 208-3-60 or 380-3-50 oper-
ation. See unit wiring diagram.
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 sup-
plied disconnect switch.
FIGURE 16 - TYPICAL ELECTRONIC THERMOSTAT FIELD WIRING
W 2
R C
R H
Y 1
Y 2
W 1
G
C
X 1
X 3
X 4
A 1
A 2
T
T
W 2
Y 1
Y 2
W 1
G
C
O C C
X
R
T H E R M O S T A T
1
T E R M I N A L S U N I T T E R M I N A L S
S T R I P T B 1
1
E l e c r o n i c p r o g r a m m a b l e T h e r m o s a 2 E T 0 7 7 0 0 1 0 0 2 4 ( i n c l u d e s s u b b a s e ) .
2
T e r m i n a l s A 1 a n d A 2 p r o v i d e a r e l a y o u p u o c l o s e h e o u d o o r
e c o n o m i z e r d a m p e r s w h e n h e h e r m o s a s w i c h e s o h e s e - b a c k p o s i i o n .
2 4 V o l
T r a n s f o r m e r
2
T O R E M O T E S E N S O R
2 E T 0 4 7 0 1 3 2 4 I F U S E D
208/230-3-60 and 380/415-3-50 units control
transformers are factory wired for 230v and
415v power supply respectively. Change tap
on transformer for 208-3-60 or 380-3-50 oper-
ation. See unit wiring diagram.

66389-BIM-C-1208
Johnson Controls Unitary Products 17
FIGURE 17 - TYPICAL FIELD WIRING 24 VOLT THERMOSTAT
O C C
W 1
W 2
Y 1
G
Y 2
X
R
S D
C
R E M O T E M I N P O S
W 1
W 2
Y 1
G
Y 2
C
U N I T C O N T R O L
B O A R D
T - S T A T
R H
R C
FIGURE 18 - FIELD WIRING DISCONNECT - COOLING UNIT WITH/WITHOUT ELECTRIC HEAT
TERMINAL BLOCK TB1
FACTORY OR FIELD
SUPPLIED DISCONNECT
GROUND
LUG
THREE
PHASE
POWER
SUPPLY

66389-BIM-C-1208
18 Johnson Controls Unitary Products
FIGURE 19 - FIELD WIRING DISCONNECT - COOLING UNIT WITH GAS HEAT
L1
T1
L2
T2 T3
L3
FACTORY OR FIELD
SUPPLIED DISCONNECT
THREE
PHASE
POWER
SUPPLY
GROUND
LUG
CONTACTOR 1M

66389-BIM-C-1208
Johnson Controls Unitary Products 19
TABLE 8: ELECTRICAL DATA DW-12 (12-1/2 TON) WITHOUT POWERED CONVENIENCE OUTLET
RL
A
LR
A
FL
A
35 3 5 3 5353 5
ea. ea. ea. HP HP HP HP HP HP HP HP HP HP
None -- -- 61.9 67.1 67.4 72.6 80 80 80 90
2TP04521825 13.5 37.5 61.9 67.1 67.4 73.8 80 80 80 90
2TP04522425 18.0 50.0 76.1 82.6 83.0 89.5 80 90 90 90
2TP04523625 25.5 70.8 102.1 108.6 109.0 115.5 110 110 110 125
2TP04525425 40.6 112.7 154.5 161.0 161.4 167.9 175 175 175 175
None -- -- 61.9 67.1 67.4 72.6 80 80 80 90
2TP04521825 18.0 43.3 67.8 74.3 74.6 81.1 80 80 80 90
2TP04522425 24.0 57.7 85.8 92.3 92.7 99.2 90 100 100 100
2TP04523625 34.0 81.8 115.9 122.4 122.7 129.2 125 125 125 150
2TP04525425 54.0 129.9 143.5 150.0 150.4 156.9 175 175 175 175
None -- -- 27.4 30.2 29.6 32.4 35 35 35 40
2TP04521846 18 22.6 33.7 37.2 36.4 39.9 35 40 40 40
2TP04522446 24 30.1 42.7 46.2 45.5 49 45 50 50 50
2TP04523646 34 42.7 57.7 61.2 60.5 64 60 70 70 70
2TP04525446 54 67.8 71.6 75.1 74.3 77.8 80 90 80 90
None -- -- 21.6 23.5 23.4 25.3 25 30 30 30
2TP04521858 18 18.1 26.8 29.2 29 31.4 30 30 30 35
2TP04522458 24 24.1 34 36.4 36.2 38.6 35 40 40 40
2TP04523658 34 34.1 46 48.4 48.3 50.6 50 50 50 60
2TP04525458 54 54.2 57.1 59.5 59.3 61.7 70 70 70 70
1
Pwr
Exh
Motor Electric Heater
Model No.
Actual
KW
0.0
5.5 0.0
0.8 5.3 8.1 2.2 0.0
1.5 10.9 16.120.0 146.0
8.4 73.0
10.9 16.1 5.5 0.0
Maximum HACR breaker of the same AMP size is applicable.
6.7 60.0 0.6 4.1 6.0 1.8
MCA
w/Power
Exhaust
(Amps)
Max
Fuse
Size
(Amps)
Max Fuse Size
w/Power
Exhaust
(Amps)
FLA
Pwr
Conv
Outlet Heater
Amps
Min. Circuit
Ampacity
(Amps)
FLA
208 20.0 146.0 1.5
230
460
575
Voltage
Compressors OD Fan
Motors
Supply
Blower
Motor FLA
1
1
TABLE 9: ELECTRICAL DATA DW-12 (12-1/2 TON) WITH POWERED CONVENIENCE OUTLET
RL
A
LR
A
FL
A
35 3 5 3 5353 5
ea. ea. ea. HP HP HP HP HP HP HP HP HP HP
None -- -- 71.9 77.1 77.4 82.6 90 90 90 100
2TP04521825 13.5 37.5 73.0 79.5 79.8 86.3 90 90 90 100
2TP04522425 18.0 50.0 88.6 95.1 95.5 102.0 90 100 100 110
2TP04523625 25.5 70.8 114.6 121.1 121.5 128.0 125 125 125 150
2TP04525425 40.6 112.7 167.0 173.5 173.9 180.4 175 175 175 200
None -- -- 71.9 77.1 77.4 82.6 90 90 90 100
2TP04521825 18.0 43.3 80.3 86.8 87.1 93.6 90 90 90 100
2TP04522425 24.0 57.7 98.3 104.8 105.2 111.7 100 110 110 125
2TP04523625 34.0 81.8 128.4 134.9 135.2 141.7 150 150 150 150
2TP04525425 54.0 129.9 156.0 162.5 162.9 169.4 175 175 175 175
None -- -- 32.4 35.2 34.6 37.4 40 40 40 45
2TP04521846 18 22.6 39.9 43.4 42.7 46.2 40 45 45 50
2TP04522446 24 30.1 49 52.5 51.7 55.2 50 60 60 60
2TP04523646 34 42.7 64 67.5 66.7 70.2 70 70 70 80
2TP04525446 54 67.8 77.8 81.3 80.6 84.1 90 90 90 90
None -- -- 25.6 27.5 27.4 29.3 30 30 30 35
2TP04521858 18 18.1 31.8 34.2 34 36.4 35 35 35 40
2TP04522458 24 24.1 39 41.4 41.2 43.6 40 45 45 45
2TP04523658 34 34.1 51 53.4 53.3 55.6 60 60 60 60
2TP04525458 54 54.2 62.1 64.5 64.3 66.7 70 70 70 70
1
2.2 5.0
6.7 60.0 0.6 4.1 6.0 1.8 4.0
8.4
1.5 10.9 16.1 5.5 10.0
1.5 10.9 16.1 5.5 10.0
73.0 0.8 5.3 8.1
460
Maximum HACR breaker of the same AMP size is applicable.
575
Min. Circuit
Ampacity
(Amps)
MCA
w/Power
Exhaust
(Amps)
Max
Fuse
Size
(Amps)
Max Fuse Size
w/Power
Exhaust
(Amps)
Heater
Amps
FLA
208
230
Compressors OD Fan
Motors
20.0 146.0
20.0 146.0
Voltage Electric Heater
Model No.
Actual
KW
Supply
Blower
Motor FLA
Pwr
Exh
Motor
FLA
Pwr
Conv
Outlet
1
1

66389-BIM-C-1208
20 Johnson Controls Unitary Products
OPTIONAL ELECTRIC HEAT
The factory-installed heaters are wired for single point power
supply. Power supply need only be brought into the single
point terminal block.
These CSA approved heaters are located within the central
compartment of the unit with the heater elements extending
into the supply air chamber.
Fuses are supplied, where required, by the factory. Some kW
sizes require fuses and other do not. Refer to Table 11 for
minimum CFM limitations and to Tables 8 through 9 for elec-
trical data.
TABLE 10: PHYSICAL DATA
Component Model
DW-12
Evaporator
Blower
Blower, Centrifugal (Dia. X Wd. in.) 15 x 15
Motor, Standard (HP) 3
Motor, Optional (HP) 5
Evaporator
Coil
Rows 4
Fins per Inch 15
Height (in.) 40
Face Area (ft.2each) 13.2
Condenser
Fan
(4 per Unit)
Propeller Dia. (in., each) 24
Motor (HP, each) 1/3
CFM, Nominal (each) 3500
Condenser
Coil
(2 per unit)
Rows (each) 2
Fins per Inch 15
Height (in. each) 36
Face Area (ft.2each) 11.88
Refrigerant
Charge System 1 (lb./oz.) 21/0
System 2 (lb./oz.) 20/8
Compressors Quantity 2
Type Scroll
Air Filters Size (Wd. x Ht. x Thickness in.) 25x20x2
Number Per Unit 4
TABLE 11: MINIMUM SUPPLY AIR CFM
Heater Unit Model Size, Nominal Tons
kW Voltage 12.5
Minimum Supply Air CFM
18
208/230 3750
24
36
54
18
480 3750
24
36
54
18
600 3750
24
36
54