York PREDATOR MagnaDRY DR090 User manual

INSTALLATION
MANUAL - 50 Hz
CAUTION: READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
MagnaDRY™
SINGLE PACKAGE AIR CONDITIONERS AND
SINGLE PACKAGE GAS/ELECTRIC UNITS
DR090
7-1/2 TON
(50 Hz)
264276-XIM-B-1208
®
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.
CONTENTS
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . 5
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
RENEWAL PARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . 6
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . 44
START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . 45
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . 49
See the following pages for a complete Table of Contents.

264276-XIM-B-1208
2Johnson Controls Unitary Products
TABLE OF CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 5
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
INSTALLATION SAFETY INFORMATION . . . . . . . . . . . .8
PRECEDING INSTALLATION. . . . . . . . . . . . . . . . . . . . . .8
LIMITATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
LOCATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
RIGGING AND HANDLING . . . . . . . . . . . . . . . . . . . . . . . 11
CLEARANCES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
DUCT COVERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
CONDENSATE DRAIN . . . . . . . . . . . . . . . . . . . . . . . . . .17
COMPRESSORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
THERMOSTAT WIRING . . . . . . . . . . . . . . . . . . . . . . . . .17
POWER AND CONTROL WIRING . . . . . . . . . . . . . . . . .17
POWER WIRING DETAIL . . . . . . . . . . . . . . . . . . . . . . . .18
OPTIONAL ELECTRIC HEAT . . . . . . . . . . . . . . . . . . . . .22
OPTIONAL GAS HEAT . . . . . . . . . . . . . . . . . . . . . . . . . .22
GAS PIPING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
GAS CONNECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
LP UNITS, TANKS AND PIPING . . . . . . . . . . . . . . . . . . . . . . .24
VENT AND COMBUSTION AIR. . . . . . . . . . . . . . . . . . . . . . . .24
OPTIONS/ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . 24
ELECTRIC HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
MOTORIZED OUTDOOR DAMPER . . . . . . . . . . . . . . . . . . . .24
ECONOMIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
POWER EXHAUST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
RAIN HOOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
ECONOMIZER AND POWER EXHAUST SET POINT
ADJUSTMENTS AND INFORMATION. . . . . . . . . . . . . . . . 25
MINIMUM POSITION ADJUSTMENT . . . . . . . . . . . . . . . . . . .25
ENTHALPY SET POINT ADJUSTMENT . . . . . . . . . . . . . . . . .25
POWER EXHAUST DAMPER SET POINT (WITH OR WITHOUT
POWER EXHAUST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
INDOOR AIR QUALITY AQ . . . . . . . . . . . . . . . . . . . . . . . . . . .25
PHASING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
BLOWER ROTATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
BELT TENSION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
AIR BALANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
CHECKING AIR QUANTITY . . . . . . . . . . . . . . . . . . . . . .32
METHOD ONE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
METHOD TWO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
SUPPLY AIR DRIVE ADJUSTMENT. . . . . . . . . . . . . . . .33
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
SEQUENCE OF OPERATIONS OVERVIEW . . . . . . . . . 36
COOLING SEQUENCE OF OPERATION. . . . . . . . . . . .36
CONTINUOUS BLOWER. . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
INTERMITTENT BLOWER. . . . . . . . . . . . . . . . . . . . . . . . . . . .36
NO OUTDOOR AIR OPTIONS. . . . . . . . . . . . . . . . . . . . . . . . .36
ECONOMIZER WITH SINGLE ENTHALPY SENSOR -. . . . . .37
ECONOMIZER WITH DUAL ENTHALPY SENSORS - . . . . . .37
ECONOMIZER WITH POWER EXHAUST - . . . . . . . . . . . . . .37
MOTORIZED OUTDOOR AIR DAMPERS -. . . . . . . . . . . . . . .37
COOLING OPERATION ERRORS. . . . . . . . . . . . . . . . . . . . . .37
HIGH-PRESSURE LIMIT SWITCH . . . . . . . . . . . . . . . . . . . . .37
LOW-PRESSURE LIMIT SWITCH . . . . . . . . . . . . . . . . . . . . . 37
FREEZESTAT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
LOW AMBIENT COOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
COMPRESSOR PROTECTION . . . . . . . . . . . . . . . . . . . 38
FLASH CODES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
REHEAT MODE SEQUENCE OF OPERATION. . . . . . . 38
“NORMAL” MODE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
"ALTERNATE” MODE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
ELECTRIC HEATING SEQUENCE OF OPERATIONS . 42
ELECTRIC HEAT OPERATION ERRORS . . . . . . . . . . . 42
TEMPERATURE LIMIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
LIMIT SWITCH (LS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
FLASH CODES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
ELECTRIC HEAT ANTICIPATOR SETPOINTS . . . . . . . 42
GAS HEATING SEQUENCE OF OPERATIONS . . . . . . 42
IGNITION CONTROL BOARD . . . . . . . . . . . . . . . . . . . . 42
FIRST STAGE OF HEATING . . . . . . . . . . . . . . . . . . . . . . . . . 42
SECOND STAGE OF HEATING. . . . . . . . . . . . . . . . . . . . . . . 43
RETRY OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
RECYCLE OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
GAS HEATING OPERATION ERRORS . . . . . . . . . . . . . 43
LOCK-OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
TEMPERATURE LIMIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
FLAME SENSE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
GAS VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
LIMIT SWITCH (LS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
AUXILIARY LIMIT SWITCH (ALS) . . . . . . . . . . . . . . . . . . . . . 44
PRESSURE SWITCH (PS). . . . . . . . . . . . . . . . . . . . . . . . . . . 44
ROLLOUT SWITCH (ROS). . . . . . . . . . . . . . . . . . . . . . . . . . . 44
INTERNAL MICROPROCESSOR FAILURE . . . . . . . . . . . . . 44
FLASH CODES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
RESETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
GAS HEAT ANTICIPATOR SETPOINTS . . . . . . . . . . . . 44
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . . 44
PRESTART CHECK LIST. . . . . . . . . . . . . . . . . . . . . . . . 44
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . 45
POST START CHECK LIST . . . . . . . . . . . . . . . . . . . . . . 45
START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . . . . 45
PRE-START CHECK LIST . . . . . . . . . . . . . . . . . . . . . . . 45
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . 45
LIGHTING THE MAIN BURNERS. . . . . . . . . . . . . . . . . . . . . . 45
POST START CHECKLIST. . . . . . . . . . . . . . . . . . . . . . . 45
SHUT DOWN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
MANIFOLD GAS PRESSURE ADJUSTMENT . . . . . . . . 45
CHECKING GAS INPUT . . . . . . . . . . . . . . . . . . . . . . . . . 46
NATURAL GAS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
ADJUSTMENT OF TEMPERATURE RISE. . . . . . . . . . . 47
BURNERS/ORIFICES INSPECTION/SERVICING . . . . . 47
CHARGING THE UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . 48
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . 49
PREDATOR® FLASH CODES . . . . . . . . . . . . . . . . . . . . 49
UNIT CONTROL BOARD OPTION SETUP . . . . . . . . . . 50
OPTION BYTE SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . 50
HEAT DELAY SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
COOLING TROUBLESHOOTING GUIDE. . . . . . . . . . . . 54
GAS HEAT TROUBLESHOOTING GUIDE. . . . . . . . . . . 57

264276-XIM-B-1208
Johnson Controls Unitary Products 3
LIST OF FIGURES
Fig. # Pg. #
1 UNIT SHIPPING BRACKET . . . . . . . . . . . . . . . . . . . . . 8
2 CONDENSER COVERING . . . . . . . . . . . . . . . . . . . . . . 8
3 COMPRESSOR SECTION . . . . . . . . . . . . . . . . . . . . . . 8
4 PREDATOR® COMPONENT LOCATION . . . . . . . . . 10
5 UNIT 4 POINT LOAD . . . . . . . . . . . . . . . . . . . . . . . . . 11
6 UNIT 6 POINT LOAD . . . . . . . . . . . . . . . . . . . . . . . . . 11
7 UNIT CENTER OF GRAVITY . . . . . . . . . . . . . . . . . . . 11
8 UNIT DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 13
9 BOTTOM DUCT OPENINGS (FROM ABOVE) . . . . . 14
10 REAR DUCT DIMENSIONS . . . . . . . . . . . . . . . . . . . . 14
11 PREDATOR® ROOF CURB DIMENSIONS . . . . . . . . 15
12 SUNLINE™ TO PREDATOR® TRANSITION ROOF
CURBS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
13 SIDE PANELS WITH HOLE PLUGS . . . . . . . . . . . . . 16
14 RETURN DOWNFLOW PLENUM WITH PANEL . . . . 16
15 DISCHARGE PANEL IN PLACE. . . . . . . . . . . . . . . . . 16
16 CONDENSATE DRAIN . . . . . . . . . . . . . . . . . . . . . . . . 17
17 TYPICAL LOW VOLTAGE FIELD WIRING . . . . . . . . 18
Fig. # Pg. #
18 FIELD WIRING DISCONNECT - COOLING UNIT
WITH OR WITHOUT ELECTRIC HEAT . . . . . . . . . . 19
19 FIELD WIRING DISCONNECT - COOLING UNIT
WITH GAS HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
20 SIDE ENTRY GAS PIPING . . . . . . . . . . . . . . . . . . . . 22
21 BOTTOM ENTRY GAS PIPING . . . . . . . . . . . . . . . . . 22
22 ENTHALPY SET POINT CHART . . . . . . . . . . . . . . . . 26
23 HONEYWELL ECONOMIZER CONTROL W7212. . . 26
24 BELT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . 27
25 DRY COIL DELTA P CABINET . . . . . . . . . . . . . . . . . 33
26 REHEAT CONTROL BOARD. . . . . . . . . . . . . . . . . . . 40
27 DR090 REHEAT CONTROLS . . . . . . . . . . . . . . . . . . 41
28 TYPICAL FLAME . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
29 TYPICAL GAS VALVE . . . . . . . . . . . . . . . . . . . . . . . . 48
30 UNIT CONTROL BOARD. . . . . . . . . . . . . . . . . . . . . . 50
31 BASIC TROUBLESHOOTING FLOWCHART . . . . . . 52
32 POWER ON FLOW CHART. . . . . . . . . . . . . . . . . . . . 52
33 TRIP FAILURE FLOW CHART. . . . . . . . . . . . . . . . . . 53

264276-XIM-B-1208
4Johnson Controls Unitary Products
LIST OF TABLES
Tbl. # Pg. #
1 UNIT VOLTAGE LIMITATIONS . . . . . . . . . . . . . . . . . . 10
2 UNIT TEMPERATURE LIMITATIONS. . . . . . . . . . . . . 10
3 UNIT WEIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 4 POINT LOAD WEIGHT. . . . . . . . . . . . . . . . . . . . . . .11
5 6 POINT LOAD WEIGHT. . . . . . . . . . . . . . . . . . . . . . .11
6 UNIT HEIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
7 UNIT CLEARANCES . . . . . . . . . . . . . . . . . . . . . . . . .13
8 REAR DUCT DIMENSIONS . . . . . . . . . . . . . . . . . . . . 14
9 CONTROL WIRE SIZES . . . . . . . . . . . . . . . . . . . . . . . 17
10 ELECTRICAL DATA 7-1/2 TON. . . . . . . . . . . . . . . . . .20
11 PHYSICAL DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
12 ELECTRIC HEAT MINIMUM SUPPLY AIR . . . . . . . . .22
13 GAS APPLICATION DATA . . . . . . . . . . . . . . . . . . . . . 22
14 GAS PIPE SIZING - CAPACITY OF PIPE. . . . . . . . . .23
15 SUPPLY AIR LIMITATIONS . . . . . . . . . . . . . . . . . . . . 27
16 BLOWER PERFORMANCE 7-1/2 TON STANDARD
MOTOR - SIDE DUCT (IMPERIAL) . . . . . . . . . . . . . .28
17 BLOWER PERFORMANCE 7-1/2 TON STANDARD
MOTOR - SIDE DUCT (METRIC) . . . . . . . . . . . . . . . .28
18 BLOWER PERFORMANCE 7-1/2 TON OPTIONAL
MOTOR - SIDE DUCT (IMPERIAL) . . . . . . . . . . . . . .28
19 BLOWER PERFORMANCE 7-1/2 TON OPTIONAL
MOTOR - SIDE DUCT (METRIC) . . . . . . . . . . . . . . . .29
Tbl. # Pg. #
20 BLOWER PERFORMANCE 7-1/2 TON STANDARD
MOTOR - DOWNSHOT (IMPERIAL) . . . . . . . . . . . . . 29
21 BLOWER PERFORMANCE 7-1/2 TON STANDARD
MOTOR - DOWNSHOT (METRIC) . . . . . . . . . . . . . . 29
22 BLOWER PERFORMANCE 7-1/2 TON OPTIONAL
MOTOR - DOWNSHOT (IMPERIAL) . . . . . . . . . . . . . 30
23 BLOWER PERFORMANCE 7-1/2 TON OPTIONAL
MOTOR - DOWNSHOT (METRIC) . . . . . . . . . . . . . . . 30
24 INDOOR BLOWER SPECIFICATIONS. . . . . . . . . . . . 30
25 ADDITIONAL STATIC RESISTANCE (IMPERIAL) . . . 34
26 ADDITIONAL STATIC RESISTANCE (METRIC) . . . . 35
27 MOTOR SHEAVE DATUM . . . . . . . . . . . . . . . . . . . . . 36
28 ELECTRIC HEAT LIMIT SETTING . . . . . . . . . . . . . . . 42
29 ELECTRIC HEAT ANTICIPATOR SETPOINTS . . . . . 42
30 GAS HEAT LIMIT SETTINGS . . . . . . . . . . . . . . . . . . . 44
31 GAS HEAT ANTICIPATOR SETPOINTS . . . . . . . . . . 44
32 GAS HEAT STAGES. . . . . . . . . . . . . . . . . . . . . . . . . . 46
33 GAS RATE CUBIC FEET PER HOUR . . . . . . . . . . . . 47
34 UNIT CONTROL BOARD FLASH CODES . . . . . . . . . 49
35 HEAT DELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
36 IGNITION CONTROL FLASH CODES . . . . . . . . . . . . 51
37 REHEAT CONTROL BOARD FLASH CODES . . . . . . 51

264276-XIM-B-1208
Johnson Controls Unitary Products 5
GENERAL
YORK®Predator®MagnaDRY™ 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.

264276-XIM-B-1208
6Johnson Controls Unitary Products
REFERENCE
Additional information is available in the following reference
forms:
• Technical Guide - DR090, 265485
• General Installation - DR090, 264276
• 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
RENEWAL PARTS
Contact your local York®parts distribution center for autho-
rized 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.

264276-XIM-B-1208
Johnson Controls Unitary Products 7
NOMENCLATURE
D R 090 N10 A 7 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)
3 = Third Generation
Product Generation
C00 = Cooling Only. No heat installed
Heat Type and Nominal Heat Capacity
N10 = 100 MBH Output Aluminized Steel
N15 = 150 MBH Output Aluminized Steel
S10 = 100 MBH Output Stainless Steel
S15 = 150 MBH Output Stainless Steel
E09 = 9 KW
E18 = 18 KW
E24 = 24 KW
E36 = 36 KW
E54 = 54 KW
Gas Heat Options
Electric Heat Options
Nominal Cooling Capacity
090 = 7.5 Ton
Product Identifier
R = Reheat
Voltage
7 = 380/415-3-50
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.
Honeywell 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
RC = Coil Guard, Shipping Bag & American Flag
TA = Technicoat Condenser Coil
TJ = Technicoat Evaporator Coil
TS = Technicoat Evaporator & Condenser Coils
7.5 Ton York®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.

264276-XIM-B-1208
8Johnson Controls Unitary Products
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 10 of these instructions.
3. Never test for gas leaks with an open flame. Use com-
mercially available soap solution made specifically for
the detection of leaks when checking all connections, as
specified on Pages 8, 23, 24 and 45 of these instruc-
tions.
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 47 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.
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
FIGURE 2 - CONDENSER COVERING
FIGURE 3 - COMPRESSOR SECTION
Bracket
Screws Turn down
Condenser
Coil External
Protective
Covering
Barometric
Relief Hood in
Shipping Loca-
tion (if included)
Toolless
Doorknobs
Installation
Instruction
Packet

264276-XIM-B-1208
Johnson Controls Unitary Products 9
LIMITATIONS
These units must be installed in accordance with the follow-
ing:
1. Local building codes, and
2. Local gas utility requirements
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.
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.
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.

264276-XIM-B-1208
10 Johnson Controls Unitary Products
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 (102 mm). The
length and width should be at least 6 inches (152 mm)
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” (13 mm) across the entire
width and length of unit.
FIGURE 4 - PREDATOR®COMPONENT LOCATION
Roof curbs in eight- and
fourteen-inch heights. Roof
curbs for transitioning from
York Sunline™ footprint to
the ZH Series footprints are
also available (field-installed
accessory)
Base rails w/forklift
slots (three sides)
and lifting holes
Compressor #2
access (high-
efficiency
compressor
w/crankcase
heater)
Dual stage
cooling for
maximum
comfort
Second model
nameplate
inside hinged
access panel
Terminal block for
hi-voltage connection
Simplicity™ control board
w/screw connector for T-stat
wiring and network connections
Disconnect location
(optional disconnect switch)
Filter access
(2” throw-away)
Filter drier
(solid core)
Condenser section
Slide-out motor and
blower assembly for
easy adjustment
and service
Belt-drive
blower motor
Power ventor motor
20-gauge alumi-
nized 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
efficient operation
Slide-out drain pan
with steel 3/4” NPT,
female connection
Compressor #1 access
(high-efficiency compressor
w/crankcase heater)
Toolless
door latch
Side entry power
and control wiring
knockouts
TABLE 1: UNIT VOLTAGE LIMITATIONS
Power Rating*
*. Utilization range “A” in accordance with ARI Standard
110.
Minimum Maximum
380/415-3-50 342 456
TABLE 2: UNIT TEMPERATURE LIMITATIONS
Temperature Min. Max.
Wet Bulb Temperature °F(°C) of Air
on Evaporator Coil 57(14) 72(22)
Dry Bulb Temperature °F(°C) of Air
on Condenser Coil 0(-18) 125(52) 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.

264276-XIM-B-1208
Johnson Controls Unitary Products 11
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
(1524 mm.).
FIGURE 7 - UNIT CENTER OF GRAVITY
If a unit is to be installed on a roof curb other than a
YORK 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 5 - UNIT 4 POINT LOAD
D
A
CB
L E F T
F R O N T
TABLE 3: UNIT WEIGHT
Model Shipping Weight
lbs. (kg) Operating Weight lbs. (kg)
090 1163 (527.5) 1148 (520.7)
TABLE 4: 4 POINT LOAD WEIGHT
Model Location (lbs. (kg.))
ABCD
090 250
(113.4) 215 (97.5) 309 (140.2) 374 (169.6)
TABLE 5: 6 POINT LOAD WEIGHT
Model Locations (lbs. (kg.))
ABCDEF
090 171
(77.6) 154 (69.9) 139 (63.0) 201 (91.2) 225 (102.0) 258 (117.0)
FIGURE 6 - UNIT 6 POINT LOAD
Unit Model Number X Y
DR090 41 (1041) 24 (610)
D
A
C
B
E
F
L E F T
F R O N T
XY
LEFT FRONT

264276-XIM-B-1208
12 Johnson Controls Unitary Products
CLEARANCES
All units require particular clearances for proper operation and
service. Installer must make provisions for adequate combus-
tion 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 7 for clearances required for combustible
construction, servicing, and proper unit operation.
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

264276-XIM-B-1208
Johnson Controls Unitary Products 13
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 8 - UNIT DIMENSIONS
See Detail
B
For Baserail
Dimensions
See Detail C
89
(2260)
27
(685)
59
(1500)
4-1/4
(110)
17-3/16
(435)
24-3/16
(615)
30-3/16
(765)
Power
Entry
Ø 2-1/2
(65)
11-1/2
(290)
30-11/32
(770)
Control
Entry
Ø 7/8
(22)
Power
Entry
Ø 2-1/2
(65)
LEFT
FRONT
6-3/16
(155)
Convenience
Power
Outlet
Entry
Ø 7/8
(22)
NOTE: (xxx) indicates dimensions
given in millimeters
For Drain
Dimensions
See Detail D
8
TABLE 6: UNIT HEIGHT
Unit Model Number X
DR090 50 3/4 (1289)
TABLE 7: UNIT CLEARANCES *
*. In inches and millimeters, in.(mm).
Top†
†. Units must be installed outdoors. Overhanging struc-
ture or shrubs should not obstruct condenser air dis-
charge outlet.
72(1830) Right 12(305)
Front 36(915) Left 36(915)
Rear‡
‡. To remove the slide-out drain pan, a rear clearance of
60” (1525 mm) is required. If space is unavailable, the
drain pan can be removed through the front by separat-
ing the corner wall.
36(915) Bottom**
**. Units may be installed on combustible floors.
0(0)
5 - 1 / 4
( 1 3 5 ) B a s e
P a n
1 7 - 1 3 / 1 6
( 4 5 0 )
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 t
DETAIL B
3 - 3 / 4
( 9 5 )
3 - 9 / 1 6
( 9 0 )
2 - 3 / 8
( 6 0 )
DETAIL C
5 - 3 / 8
( 1 3 5 )
DETAIL D

264276-XIM-B-1208
14 Johnson Controls Unitary Products
.
FIGURE 9 - BOTTOM DUCT OPENINGS (FROM ABOVE)
3 2 - 1 1 / 1 6
( 8 3 0 )
6 - 1 3 / 1 6
( 1 7 5 )
6 - 1 3 / 1 6
( 1 7 5 )
2 7 - 1 / 2
( 7 0 0 )
1 8
( 4 5 5 )
2
1 - 3 / 1 6
( 5 4 0 )
1 9 - 3 / 1 6
( 4 8 5 )
1 7 - 3 / 1 6
( 4 3 5 )
1 4 - 2 3 / 3 2
( 3 7 5 )
1 6 - 3 / 8
( 4 1 5 )
1 8 - 1 / 1 6
( 4 6 0 ) 6 3 - 1 / 2
(
1 6 1 0
)
1 2 - 5 / 1 6
( 3 1 5 )
6 - 1 3 / 1 6
( 1 7 5 )
2 4
( 6 1 0 )
2 1
( 5 3 5 )
L E F T
B o t t o m g a s
s u p p l y e n t r y
B o t t o m P o w e r ,
C o n t r o l a n d
C o n v e n i e n c e
O u t l e t W i r i n g
E n t r y
N O T E : ( X X X ) I N D I C A T E S
D I M E N S I O N S I N
M I L L I M E T E R S
F R O N T
FIGURE 10 -REAR DUCT DIMENSIONS
TABLE 8: REAR DUCT DIMENSIONS
Unit Dimensions
“A” “B” “C”
DR090 28 1/4 (717) 18 1/16 (459) 28 1/4 (717
NOTE: (XXX) indicates millimeters
18-1/4
(465)
5-5/32
(130) 31-11/16
(805)
2-31/32
(75)
18-1/4
(465)
Return
Air
Supply
Air
DOT PLUGS
A
B
C

264276-XIM-B-1208
Johnson Controls Unitary Products 15
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 9 for bottom air duct openings. Refer to Fig-
ure 10 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 11 -PREDATOR®ROOF CURB DIMENSIONS
5 0 - 1 / 2
( 1 2 8 5 )
3 0
( 7 6 0 )
2 0
( 5 1 0 )
8 0 - 5 / 8
( 2 0 5 0 )
6
( 1 5 0 )
2 T Y P .
( 5 0 )
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
2 0
( 5 1 0 )
N O T E : ( X X X ) I N D I C A T E S
D I M E N S I O N S I N
M I L L I M E T E R S
1 4
( 3 5 5 )
8
( 2 0 5 ) O R

264276-XIM-B-1208
16 Johnson Controls Unitary Products
Note orientation. Panel is “insulation” side up.
FIGURE 12 -SUNLINE™ TO PREDATOR®TRANSITION ROOF CURBS
7 6 - 5 / 8
( 1 9 4 5 )
9 4
( 2 3 9 0 )
5 0 - 1 / 2
( 1 2 8 5 )
3 0 - 1 / 2
( 7 7 5 )
6 4 - 1 / 4
( 1 6 3 0 )
5 9 - 1 / 4
( 1 5 0 5 )
1 0
( 2 5 5
)
2 3
( 5 8 5 )
4
( 1 0 0 )
2 6
( 6 6 0 )
8 0 - 5 / 8
( 2 0 5 0 )
2 T Y P
( 5 0 )
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 13 -SIDE PANELS WITH HOLE PLUGS
FIGURE 14 -RETURN DOWNFLOW PLENUM WITH
PANEL
FIGURE 15 -DISCHARGE PANEL IN PLACE

264276-XIM-B-1208
Johnson Controls Unitary Products 17
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 16: Condensate Drain. 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 (19 mm) 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 inches (1422 mm) above the floor where it will not
be subject to drafts, sun exposure or heat from electrical fix-
tures 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 9 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.
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. When installing
a disconnect, refer to Figure 4 for the recommended mount-
ing location.
FIGURE 16 -CONDENSATE DRAIN
Do not loosen the compressor mounting bolts.
Make sure that panel latches are properly positioned
on the unit to maintain an airtight seal.
3 " M i n i m u m
( 7 6 . 2 m m )
TABLE 9: CONTROL WIRE SIZES
Wire Size Maximum Length
18 AWG 150 Feet (45.72 meters)
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 trans-
former for 208-3-60 or 380-3-50 operation. See
unit wiring diagram.
Avoid damage to internal components if drilling
holes for disconnect mounting.

264276-XIM-B-1208
18 Johnson Controls Unitary Products
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 17, 18 and 19 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 10 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.
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 17 -TYPICAL LOW VOLTAGE FIELD WIRING
THERMOSTAT
1
TERMINALS
( RCB )
REHEAT
CONTROL BOARD
RC
RH
Y1
Y2
W1
W2
G
C
X1
X3
X4
A1
A2
T
T
R
Y1
Y2
W1
W2
G
C
OCC
HUM
1
2
3
4
HUM
TERMINAL BLOCK
RH
3
2
1
Electronic programmable Thermostat 2ET0770010024
( includes subbase).
2
Terminals A1 and A2 provide a relay output to close the
outdoor economizer dampers when the thermostat
switches to the set-back position.
3
TO REMOTE SENSOR
2ET04701324 IF USED
DEHUMIDISTAT
Dehumidistat closes on rise in humidity.
RC
RH
Y1
Y2
G
W1
W2
CC
W2
W1
G
Y2
Y1
R
OCC
( RCB )
REHEAT
CONTROL
BOARD
HUM
TERMINAL
BLOCK
RH
1
1
2
3
4
1
DEHUMIDISTAT
Dehumidistat closes on rise in humidity.
TYPICAL
THERMOSTAT
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 trans-
former for 208-3-60 or 380-3-50 operation. See
unit wiring diagram.

264276-XIM-B-1208
Johnson Controls Unitary Products 19
FIGURE 18 -FIELD WIRING DISCONNECT - COOLING UNIT WITH OR WITHOUT ELECTRIC HEAT
TERMINAL BLOCK TB1
FIELD SUPPLIED
DISCONNECT
GROUND
LUG
THREE
PHASE
POWER
SUPPLY
FIGURE 19 -FIELD WIRING DISCONNECT - COOLING UNIT WITH GAS HEAT
L1
T1
L2
T2 T3
L3
FIELD SUPPLIED
DISCONNECT
THREE
PHASE
POWER
SUPPLY
GROUND
LUG
CONTACTOR 1M

264276-XIM-B-1208
20 Johnson Controls Unitary Products
TABLE 10: ELECTRICAL DATA 7-1/2 TON
Voltage*
Compressors OD Fan
Motors
Supply Blower
Motor FLA Pwr Exh Motor Electric
Heater
Model No.
Actual
kW Heater Amps
Min. Circuit
Ampacity
(Amps)
MCA
w/Power
Exhaust
(Amps)
Max Fuse†
Size (Amps)
Max Fuse Size
w/Power
Exhaust
(Amps)
RLA
ea. LRA ea. FLA ea. 1.5 HP 2 HP FLA 1.5
HP 2 HP 1.5 HP 2 HP 1.5 HP 2 HP 1.5 HP 2 HP
380 7.3 58.0 1.1 4.3 5.2 2.2
None -- -- 22.9 23.8 25.1 26.0 30 30 30 30
2TP04520950 5.6 8.5 22.9 23.8 25.1 26.0 30 30 30 30
2TP04521850 11.3 17.2 26.8 28.0 29.6 30.7 30 30 30 35
2TP04522450 15.0 22.8 33.9 35.0 36.6 37.7 35 35 40 40
2TP04523650 21.3 32.4 45.8 47.0 48.6 49.7 50 50 50 50
415 7.3 58.0 1.1 4.3 5.2 2.2
None -- -- 22.9 23.8 25.1 26.0 30 30 30 30
2TP04520950 6.7 9.3 22.9 23.8 25.1 26.0 30 30 30 30
2TP04521850 13.5 18.8 28.9 30.0 31.6 32.7 30 30 35 35
2TP04522450 17.9 24.9 36.5 37.6 39.3 40.4 40 40 40 45
2TP04523650 25.4 35.3 49.5 50.7 52.3 53.4 50 60 60 60
*. Unit voltage limitations: minimum utilization 342 volts, maximum utilization 457 volts.
†. Maximum HACR breaker of the same amp size is acceptable.