Y-IM-Single Package AC and Single Package Gas

Y-IM-Single Package AC and Single Package Gas
INSTALLATION
MANUAL
®
SINGLE PACKAGE AIR CONDITIONERS AND
CONTENTS
SINGLE PACKAGE GAS/ELECTRIC UNITS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
DF 078, 090, 102 and 120
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 5
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
6-1/2 TO 10 TON
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
(10.4 EER)
RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ASHRAE 90.1 COMPLIANT
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . . . 53
START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . . . . . 54
CHARGING THE UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . 57
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
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:
CAUTION:
READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
127083-YIM-B-0606
127083-YIM-B-0606
TABLE OF CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 5
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
RENEWAL PARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ECONOMIZER WITH POWER EXHAUST . . . . . . . . . . . . . . . .49
MOTORIZED OUTDOOR AIR DAMPERS . . . . . . . . . . . . . . . .49
COOLING OPERATION ERRORS . . . . . . . . . . . . . . . . . . . . . .49
HIGH-PRESSURE LIMIT SWITCH . . . . . . . . . . . . . . . . . . . . . .49
LOW-PRESSURE LIMIT SWITCH . . . . . . . . . . . . . . . . . . . . . .49
FREEZESTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
LOW AMBIENT COOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
COMPRESSOR PROTECTION . . . . . . . . . . . . . . . . . . . 50
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
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 . . . . . . . . . . . . . . . . . . . . . . . . . . 16
COMPRESSORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
THERMOSTAT WIRING . . . . . . . . . . . . . . . . . . . . . . . . . 17
POWER AND CONTROL WIRING . . . . . . . . . . . . . . . . . 17
POWER WIRING DETAIL . . . . . . . . . . . . . . . . . . . . . . . . 17
OPTIONAL ELECTRIC HEAT . . . . . . . . . . . . . . . . . . . . . 24
OPTIONAL GAS HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . 25
ELECTRIC HEATING SEQUENCE OF OPERATIONS . 50
ELECTRIC HEAT OPERATION ERRORS . . . . . . . . . . . 50
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
GAS CONNECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
LP UNITS, TANKS AND PIPING . . . . . . . . . . . . . . . . . . . . . . . 26
VENT AND COMBUSTION AIR . . . . . . . . . . . . . . . . . . . . . . . . 27
OPTIONS/ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . 27
ELECTRIC HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
MOTORIZED OUTDOOR DAMPER . . . . . . . . . . . . . . . . . . . . 27
ECONOMIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
POWER EXHAUST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
RAIN HOOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
ECONOMIZER AND POWER EXHAUST SET
POINT ADJUSTMENTS AND INFORMATION . . . . . . . . 27
MINIMUM POSITION ADJUSTMENT . . . . . . . . . . . . . . . . . . . 27
ENTHALPY SET POINT ADJUSTMENT . . . . . . . . . . . . . . . . . 28
POWER EXHAUST DAMPER SET POINT (WITH OR
WITHOUT POWER EXHAUST) . . . . . . . . . . . . . . . . . . . . . . . . 28
INDOOR AIR QUALITY AQ . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
PHASING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
BELT TENSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
AIR BALANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
CHECKING AIR QUANTITY . . . . . . . . . . . . . . . . . . . . . . 44
METHOD ONE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
METHOD TWO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
SUPPLY AIR DRIVE ADJUSTMENT. . . . . . . . . . . . . . . . 46
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
SEQUENCE OF OPERATIONS OVERVIEW . . . . . . . . . 48
COOLING SEQUENCE OF OPERATION . . . . . . . . . . . . 48
CONTINUOUS BLOWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
INTERMITTENT BLOWER. . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
NO OUTDOOR AIR OPTIONS. . . . . . . . . . . . . . . . . . . . . . . . . 48
ECONOMIZER WITH SINGLE ENTHALPY SENSOR. . . . . . . 48
ECONOMIZER WITH DUAL ENTHALPY SENSORS . . . . . . . 49
2
TEMPERATURE LIMIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
LIMIT SWITCH (LS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
ELECTRIC HEAT ANTICIPATOR SETPOINTS . . . . . . . 51
GAS HEATING SEQUENCE OF OPERATIONS . . . . . . 51
IGNITION CONTROL BOARD . . . . . . . . . . . . . . . . . . . . 51
FIRST STAGE OF HEATING . . . . . . . . . . . . . . . . . . . . . . . . . .51
SECOND STAGE OF HEATING. . . . . . . . . . . . . . . . . . . . . . . .52
RETRY OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
RECYCLE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
GAS HEATING OPERATION ERRORS . . . . . . . . . . . . . 52
LOCK-OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
TEMPERATURE LIMIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
FLAME SENSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
GAS VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
LIMIT SWITCH (LS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
AUXILIARY LIMIT SWITCH (ALS) . . . . . . . . . . . . . . . . . . . . . .52
PRESSURE SWITCH (PS) . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
ROLLOUT SWITCH (ROS) . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
INTERNAL MICROPROCESSOR FAILURE . . . . . . . . . . . . . .53
FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
RESETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
GAS HEAT ANTICIPATOR SETPOINTS . . . . . . . . . . . . 53
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . . . .
PRESTART CHECK LIST . . . . . . . . . . . . . . . . . . . . . . . .
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . .
POST START CHECK LIST . . . . . . . . . . . . . . . . . . . . . .
53
53
54
54
START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . . . . . . 54
PRE-START CHECK LIST . . . . . . . . . . . . . . . . . . . . . . . 54
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . 54
LIGHTING THE MAIN BURNERS. . . . . . . . . . . . . . . . . . . . . . .54
POST START CHECKLIST . . . . . . . . . . . . . . . . . . . . . . .
SHUT DOWN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MANIFOLD GAS PRESSURE ADJUSTMENT . . . . . . . .
CHECKING GAS INPUT . . . . . . . . . . . . . . . . . . . . . . . . .
54
54
54
55
NATURAL GAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
ADJUSTMENT OF TEMPERATURE RISE . . . . . . . . . . . 56
BURNERS/ORIFICES INSPECTION/SERVICING . . . . . 56
CHARGING THE UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PREDATOR® FLASH CODES . . . . . . . . . . . . . . . . . . . .
COOLING TROUBLESHOOTING GUIDE. . . . . . . . . . . .
GAS HEAT TROUBLESHOOTING GUIDE . . . . . . . . . . .
59
59
63
66
Unitary Products Group
127083-YIM-B-0606
LIST OF FIGURES
Fig. #
Pg. #
Fig. #
Pg. #
1
UNIT SHIPPING BRACKET . . . . . . . . . . . . . . . . . . . . . 8
18 FIELD WIRING 24 VOLT THERMOSTAT . . . . . . . . . 18
2
CONDENSER COVERING . . . . . . . . . . . . . . . . . . . . . . 8
3
COMPRESSOR SECTION . . . . . . . . . . . . . . . . . . . . . . 8
19 FIELD WIRING DISCONNECT - COOLING UNIT
WITH/WITHOUT ELECTRIC HEAT . . . . . . . . . . . . . . 19
4
PREDATOR® COMPONENT LOCATION . . . . . . . . . 10
5
UNIT 4 POINT LOAD . . . . . . . . . . . . . . . . . . . . . . . . . 11
6
UNIT 6 POINT LOAD . . . . . . . . . . . . . . . . . . . . . . . . . 12
7
UNIT CENTER OF GRAVITY . . . . . . . . . . . . . . . . . . . 12
8
UNIT DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 13
9
BOTTOM DUCT OPENINGS . . . . . . . . . . . . . . . . . . . 14
10 REAR DUCT DIMENSIONS . . . . . . . . . . . . . . . . . . . . 14
11 PREDATOR® ROOF CURB DIMENSIONS . . . . . . . . 15
12 SUNLINE™ TO PREDATOR® TRANSITION
ROOF CURBS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
13 SIDE PANELS WITH HOLE PLUGS. . . . . . . . . . . . . . 16
14 RETURN DOWNFLOW PLENUM WITH PANEL . . . . 16
15 DISCHARGE PANEL IN PLACE . . . . . . . . . . . . . . . . . 16
16 CONDENSATE DRAIN . . . . . . . . . . . . . . . . . . . . . . . . 16
17 ELECTRONIC THERMOSTAT FIELD WIRING . . . . . 18
Unitary Products Group
20 FIELD WIRING DISCONNECT - COOLING
UNIT WITH GAS HEAT . . . . . . . . . . . . . . . . . . . . . . . 19
21 SIDE ENTRY GAS PIPING. . . . . . . . . . . . . . . . . . . . . 25
22 BOTTOM ENTRY GAS PIPING . . . . . . . . . . . . . . . . . 25
23 ENTHALPY SET POINT CHART . . . . . . . . . . . . . . . . 29
24 HONEYWELL ECONOMIZER CONTROL W7212 . . . 29
25 BELT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . 30
26 DRY COIL DELTA P 50" CABINET . . . . . . . . . . . . . . 45
27 DRY COIL DELTA P 42" CABINET . . . . . . . . . . . . . . 45
28 TYPICAL FLAME . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
29 TYPICAL GAS VALVE . . . . . . . . . . . . . . . . . . . . . . . . 56
30 UNIT CONTROL BOARD . . . . . . . . . . . . . . . . . . . . . . 60
31 BASIC TROUBLESHOOTING FLOWCHART . . . . . . 61
32 POWER ON FLOW CHART . . . . . . . . . . . . . . . . . . . . 61
33 TRIP FAILURE FLOW CHART. . . . . . . . . . . . . . . . . . 62
3
127083-YIM-B-0606
LIST OF TABLES
Tbl. #
Pg. #
Tbl. #
Pg. #
1
UNIT VOLTAGE LIMITATIONS . . . . . . . . . . . . . . . . . . 10
28 DF120 (10 TON) STANDARD MOTOR DOWN
SHOT BLOWER PERFORMANCE . . . . . . . . . . . . . . . 36
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
CONTROL WIRE SIZES . . . . . . . . . . . . . . . . . . . . . . . . 17
32 DF090 (7-1/2 TON) STANDARD MOTOR SIDE
SHOT BLOWER PERFORMANCE . . . . . . . . . . . . . . . 38
9
ELECTRICAL DATA - DF078 (6-1/2 TON) MID
EFFICIENCY W/O PWRD CONV. OUTLET . . . . . . . . . 20
33 DF090 (7-1/2 TON) OPTIONAL MOTOR SIDE
SHOT BLOWER PERFORMANCE . . . . . . . . . . . . . . . 39
10 ELECTRICAL DATA - DF078 (6-1/2 TON) MID
EFFICIENCY W/PWRD CONV. OUTLET . . . . . . . . . . . 20
34 DF102 (8-1/2 TON) STANDARD MOTOR SIDE
SHOT BLOWER PERFORMANCE . . . . . . . . . . . . . . . 40
11 ELECTRICAL DATA - DF090 (7-1/2 TON) MID
EFFICIENCY W/O PWRD CONV. OUTLET . . . . . . . . . 21
35 DF102 (8-1/2 TON) OPTIONAL DRIVE SIDE
SHOT BLOWER PERFORMANCE . . . . . . . . . . . . . . . 41
12 ELECTRICAL DATA - DF090 (7-1/2 TON) MID
EFFICIENCY W/PWRD CONV. OUTLET . . . . . . . . . . . 21
36 DF120 (10 TON) STANDARD MOTOR SIDE
SHOT BLOWER PERFORMANCE . . . . . . . . . . . . . . . 42
13 ELECTRICAL DATA DF102 (8-1/2 TON) MID
EFFICIENCY W/O PWRD CONVENIENCE OUTLET . 22
37 DF120 (10 TON) OPTIONAL MOTOR SIDE
SHOT BLOWER PERFORMANCE . . . . . . . . . . . . . . . 42
14 ELECTRICAL DATA DF102 (8-1/2 TON) MID
EFFICIENCY WITH PWRD CONVENIENCE OUTLET22
38 INDOOR BLOWER SPECIFICATIONS . . . . . . . . . . . . 43
15 ELECTRICAL DATA - DF120 (10 TON) MID
EFFICIENCY W/O PWRD CONV. OUTLET . . . . . . . . . 23
40 ADDITIONAL STATIC RESISTANCE DF078, 120. . . . 47
29 DF120 (10 TON) OPTIONAL MOTOR DOWN
SHOT BLOWER PERFORMANCE . . . . . . . . . . . . . . . 36
30 DF078 (6-1/2 TON) STANDARD MOTOR SIDE
SHOT BLOWER PERFORMANCE . . . . . . . . . . . . . . . 37
31 DF078 (6-1/2 TON) OPTIONAL MOTOR SIDE
SHOT BLOWER PERFORMANCE . . . . . . . . . . . . . . . 37
39 POWER EXHAUST SPECIFICATIONS . . . . . . . . . . . . 43
16 ELECTRICAL DATA - DF120 (10 TON) MID
EFFICIENCY W/PWRD CONV. OUTLET . . . . . . . . . . . 23
41 ADDITIONAL STATIC RESISTANCE DF 090, 102 . . . 47
17 DF PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . 24
43 ELECTRIC HEAT LIMIT SETTING 50 3/4” CABINET . 51
18 MINIMUM SUPPLY AIR CFM . . . . . . . . . . . . . . . . . . . . 24
44 ELECTRIC HEAT LIMIT SETTING 42” CABINET . . . . 51
19 GAS APPLICATION DATA . . . . . . . . . . . . . . . . . . . . . . 25
45 ELECTRIC HEAT ANTICIPATOR SETPOINTS. . . . . . 51
20 GAS PIPE SIZING - CAPACITY OF PIPE . . . . . . . . . . 25
46 GAS HEAT LIMIT CONTROL SETTINGS . . . . . . . . . . 53
21 SUPPLY AIR LIMITATIONS . . . . . . . . . . . . . . . . . . . . . 30
47 GAS HEAT ANTICIPATOR SETPOINTS . . . . . . . . . . . 53
22 DF078 (6-1/2 TON) STANDARD MOTOR DOWN
SHOT BLOWER PERFORMANCE. . . . . . . . . . . . . . . . 31
48 GAS HEAT STAGES . . . . . . . . . . . . . . . . . . . . . . . . . . 55
23 DF078 (6-1/2 TON) OPTIONAL MOTOR DOWN
SHOT BLOWER PERFORMANCE. . . . . . . . . . . . . . . . 31
24 DF090 (7-1/2 TON) STANDARD MOTOR DOWN
SHOT BLOWER PERFORMANCE. . . . . . . . . . . . . . . . 32
25 DF090 (7-1/2 TON) OPTIONAL MOTOR DOWN
SHOT BLOWER PERFORMANCE. . . . . . . . . . . . . . . . 33
26 DF102 (8-1/2 TON) STANDARD MOTOR DOWN
SHOT BLOWER PERFORMANCE. . . . . . . . . . . . . . . . 34
42 MOTOR SHEAVE DATUM DIAMETERS . . . . . . . . . . . 48
49 GAS RATE CUBIC FEET PER HOUR . . . . . . . . . . . . . 56
50 DF078 (6.5 TON) SUPERHEAT CHARGING. . . . . . . . 57
51 DF090 (7.5 TON) SUPERHEAT CHARGING. . . . . . . . 57
52 DF102 (8.5 TON) SUPERHEAT CHARGING. . . . . . . . 58
53 DF120 (10 TON) SUPERHEAT CHARGING . . . . . . . . 58
54 UNIT CONTROL BOARD FLASH CODES. . . . . . . . . . 59
55 IGNITION CONTROL FLASH CODES. . . . . . . . . . . . . 60
27 DF102 (8-1/2 TON) OPTIONAL DRIVE DOWN
SHOT BLOWER PERFORMANCE. . . . . . . . . . . . . . . . 35
4
Unitary Products Group
127083-YIM-B-0606
GENERAL
YORK® Predator® 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 electrical wiring is factory installed and tested. The units require
electric power, gas supply (where applicable), and duct connections. The electric heaters have nickel-chrome elements
and utilize single-point power connection.
If the information in this manual is not followed
exactly, a fire or explosion may result causing property damage, personal injury or loss of life.
Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
WHAT TO DO IF YOU SMELL GAS:
a.
Do not try to light any appliance.
b.
Do not touch any electrical switch; do not use
any phone in your building.
c.
Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
d.
If you cannot reach your gas supplier, call the fire
department.
SAFETY CONSIDERATIONS
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.
Due to system pressure, moving parts, and electrical components, installation and servicing of air conditioning equipment
can be hazardous. Only qualified, trained service personnel
should install, repair, or service this equipment. Untrained
personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters.
Observe all precautions in the literature, labels, and tags
accompanying the equipment whenever working on air conditioning equipment. Be sure to follow all other applicable
safety precautions and codes including ANSI Z223.1 or CSAB149.1- latest edition.
Wear safety glasses and work gloves. Use quenching cloth
and have a fire extinguisher available during brazing operations.
Unitary Products Group
Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
INSPECTION
As soon as a unit is received, it should be inspected for possible damage during transit. If damage is evident, the extent of
the damage should be noted on the carrier’s freight bill. A
separate request for inspection by the carrier’s agent should
be made in writing.
This furnace is not to be used for temporary heating
of buildings or structures under construction.
Before performing service or maintenance operations on unit, turn off main power switch to unit. Electrical shock could cause personal injury. Improper
installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer
to this manual. For assistance or additional information consult a qualified installer, service agency or
the gas supplier.
5
127083-YIM-B-0606
REFERENCE
APPROVALS
Additional information is available in the following reference
forms:
Design certified by CSA as follows:
1.
For use as a cooling only unit, cooling unit with supplemental electric heat or a forced air furnace.
2.
For outdoor installation only.
3.
For installation on combustible material and may be
installed directly on combustible flooring or, in the U.S.,
on wood flooring or Class A, Class B or Class C roof covering materials.
4.
For use with natural gas (convertible to LP with kit).
• Technical Guide - 246699
• General Installation - 127083
• 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
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.
• Electric Heater Accessory 50” Cabinet
• Electric Heater Accessory 42” Cabinet
RENEWAL PARTS
Contact your local York® parts distribution center for authorized replacement parts.
Incorrect installation may create a condition where the
operation of the product could cause personal injury
or property damage.
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.
6
Unitary Products Group
127083-YIM-B-0606
NOMENCLATURE
6.5-10.0 Ton York® Model Number Nomenclature
D F 090 N10 A 2 A AA 3 0 1 2 4 A
Product Category
Product Style
D = A/C, Single Pkg., R-22
A = Style A
B = Style B
C = Style C
Product Identifier
Configuration Options (not required for all units)
These four digits will not be assigned until a quote is requested, or an order placed.
F = 10.4 EER A/C
SS Drain Pan
Nominal Cooling Capacity
CPC Controller, DFS, APS
078 = 6.5 Ton
090 = 7.5 Ton
102 = 8.5 Ton
120 = 10.0 Ton
Honeywell Controller, DFS, APS
Johnson Controller, DFS, APS
Novar Controller, DFS, APS
Simplicity IntelliComfort Controller
Simplicity IntelliComfort Controller w/ModLinc
2" Pleated filters
Heat Type and Nominal Heat Capacity
BAS Ready Unit with Belimo Economizer
Shipping Bag
C00 = Cooling Only. No heat installed
Any Combination of Additional Options that Don’t Have an Option Code Pre-assigned
Gas Heat Options
Product Generation
N10 = 100 MBH Output Aluminized Steel
N15 = 150 MBH Output Aluminized Steel
N20 = 200 MBH Output Aluminized Steel
S10 = 100 MBH Output Stainless Steel
S15 = 150 MBH Output Stainless Steel
S20 = 200 MBH Output Stainless Steel
3 = Third Generation
4 = Fourth Generation
Additional Options
Electric Heat Options
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
E09 = 9 KW
E18 = 18 KW
E24 = 24 KW
E36 = 36 KW
E54 = 54 KW
RC = Coil Guard, Shipping Bag & American Flag
TA = Technicoat Condenser Coil
TJ = Technicoat Evaporator Coil
TS = Technicoat Evaporator & Condenser Coils
Airflow
A = Std. Motor
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 Mtr.
P = Hi Static Mtr./Econo./Barometric Relief
(Downflow Only)
Q = Hi Static Mtr./Econo./Power Exhaust
(Downflow Only)
R = Hi Static Mtr./Motorized Damper (Downflow Only)
S = Hi Static Mtr./Horizontal Economizer (No Baro.)
T = Hi Static Mtr./Slab Econo./Power Exhaust
(Downflow Only)
U = Hi Static Mtr./Slab Econo./Barometric Relief
(Downflow only)
Voltage
2 = 208/230-3-60
4 = 460-3-60
5 = 575-3-60
ZZ = If desired option combination is not listed above, ZZ will be assigned and configuration options will be
located in digits 15-18.
Installation Options
A = No Options Installed
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
Options
1 = Disconnect
2 = Non-Pwr'd Conv. Outlet
3 = Smoke Detector S.A.
4 = Smoke Detector R.A.
5 = Pwr'd Conv. Outlet
Unitary Products Group
7
127083-YIM-B-0606
INSTALLATION
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.
INSTALLATION SAFETY INFORMATION
Read these instructions before continuing this appliance
installation. This is an outdoor combination heating and cooling unit. The installer must assure that these instructions are
made available to the consumer and with instructions to
retain them for future reference.
1.
Refer to the 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 commercially available soap solution made specifically for
the detection of leaks when checking all connections, as
specified on Pages 8, 26, 27 and 54 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 56 of these instructions.
5.
Condenser
Coil External
Protective
Covering
Barometric
Relief Hood in
Shipping Location (if included)
FIGURE 2 -
CONDENSER COVERING
This equipment is not to be used for temporary heating
of buildings or structures under construction.
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warning exactly could
result in serious injury, death or property damage.
Toolless
Doorknobs
Never test for gas leaks with an open flame. use a
commercially available soap solution made specifically for the detection of leaks to check all connections. A fire or explosion may result causing property
damage, personal injury or loss of life.
Installation
Instruction
Packet
PRECEDING INSTALLATION
1.
Remove the two screws holding the brackets in the front,
rear and compressor side fork-lift slots.
Bracket
Screws
FIGURE 1 -
8
FIGURE 3 -
COMPRESSOR SECTION
Turn down
UNIT SHIPPING BRACKET
Unitary Products Group
127083-YIM-B-0606
This product must be installed in strict compliance with
the enclosed installation instructions and any applicable local, state and national codes including, but not
limited to, building, electrical, and mechanical codes.
The furnace and its individual shut-off valve must be
disconnected from the gas supply piping system during
any pressure testing at pressures in excess of 1/2
PSIG.
Pressures greater than 1/2 PSIG will cause gas valve
damage resulting in a hazardous condition. If it is subjected to a pressure greater than 1/2 PSIG, the gas
valve must be replaced.
The furnace must be isolated from the gas supply piping system by closing its individual manual shut-off
valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2
PSIG.
LIMITATIONS
These units must be installed in accordance with the following:
In U.S.A.:
1.
2.
National Electrical Code, ANSI/NFPA No. 70 - Latest
Edition
National Fuel Gas Code, ANSI Z223.1 - Latest Edition
Unitary Products Group
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 buildings or structures under construction.
9
127083-YIM-B-0606
Terminal Block
for Hi-Voltage
Connection
Simplicity® Control Board
w/Screw Connector for
T-stat Wiring and Network
Connection
Disconnect Location
(Optional Disconnect Switch)
Filter Access
(2” Filters)
Filter-Drier (Solid Core)
Condenser
Section
Second model
nameplate inside
hinged access
panel
Belt-Drive
Blower
Motor
Dual stage
cooling for
maximum
comfort
Slide-out motor
and blower
assembly for
ease of adjustment and service
Compressor #2
Access (HighEff Compressor
w/ crankcase
heater)
Base Rails w/ Forklift
Slots (3 Sides) & Lifting Holes
Roof curbs in eight- and
fourteen-inch heights.
Rood curbs for transitioning from Sunline footprint
to the DM/DH/DF Series
footprint are also available (field-installed
accessory)
FIGURE 4 -
Power Ventor Motor
Slide-Out Drain Pan
w/ Steel 3/4” NPT,
Female Connection
Toolless
door latch
Side entry power
and control wiring
knockouts
Minimum
Maximum
208/230-3-60
187
252
460-3-60
432
504
575-3-60
540
630
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.
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.
5.
Maintain level tolerance to 1/2” across the entire width
and length of unit.
Utilization range “A” in accordance with ARI Standard 110.
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
125
10
Intelligent control board for
safe and efficient operation
LOCATION
Power Rating1
1.
Compressor #1 Access (High-Eff
Compressor w/ crankcase heater)
PREDATOR® COMPONENT LOCATION (DF120 SHOWN)
TABLE 1: UNIT VOLTAGE LIMITATIONS
1.
Two-stage gas heating to maintain
warm, comfortable
temperature
A low ambient accessory is available for operation
down to -20°F.
Unitary Products Group
127083-YIM-B-0606
TABLE 3: UNIT WEIGHT
Excessive exposure of this furnace to contaminated
combustion air may result in equipment damage or
personal injury. Typical contaminates include: permanent wave solution, chlorinated waxes and cleaners, chlorine based swimming pool chemicals, water
softening chemicals, carbon tetrachloride, Halogen
type refrigerants, cleaning solvents (e.g. perchloroethylene), printing inks, paint removers, varnishes,
hydrochloric acid, cements and glues, antistatic fabric softeners for clothes dryers, masonry acid washing materials.
Model
Shipping1
Weight (lbs.)
Operating
Weight (lbs.)
DF078
1058
1053
DF090
875
870
DF102
888
883
DF120
1190
1185
ECON.
85
84
PE
150
148
GAS HEAT2
110
100
49
49
ELEC.
HEAT3
1.
Weights include largest heating option.
2.
8 tube gas section.
3.
54kW heater.
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.
If a unit is to be installed on a roof curb other than a
YORK roof curb, gasketing must be applied to all
surfaces that come in contact with the unit underside.
F R O N T
L E F T
B
C
A
D
FIGURE 5 -
UNIT 4 POINT LOAD
TABLE 4: 4 POINT LOAD WEIGHT
Location (lbs.)1
Model
Before lifting, make sure the unit weight is distributed equally on the rigging cables so it will lift evenly.
Units may be moved or lifted with a forklift. Slotted openings
in the base rails are provided for this purpose.
LENGTH OF FORKS MUST BE A MINIMUM OF 60
INCHES.
A
B
C
D
DF078
231
197
288
337
DF090
195
146
228
306
DF102
197
147
230
309
DF120
260
222
324
379
1.
Weights include largest heating option.
TABLE 5: 6 POINT LOAD WEIGHT
Model
All panels must be secured in place when the unit is
lifted.
The condenser coils should be protected from rigging cable damage with plywood or other suitable
material.
Unitary Products Group
Location (lbs.)
A
B
C
D
E
F
DF078
158
142
128
187
207
231
DF090
137
112
93
145
175
214
DF102
138
113
93
146
175
216
DF120
178
160
144
210
233
260
11
127083-YIM-B-0606
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.
F R O N T
L E F T
D
C
B
A
E
F
FIGURE 6 -
UNIT 6 POINT LOAD
X
Excessive exposure to contaminated combustion air
will result in safety and performance related problems. To maintain combustion air quality, the recommended 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.
Y
FRONT
LEFT
Unit Model Number
X
Y
DF078
47 1/2
25 1/2
DF090
38
23
DF102
38
23
DF120
47 1/2
25 1/2
FIGURE 7 -
UNIT CENTER OF GRAVITY
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 7 for clearances required
12
•
•
•
•
•
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
Unitary Products Group
127083-YIM-B-0606
30-11/32
X
See Detail
A
Control
Entry
Ø 7/8
Power
Entry
Ø 2-1/2
Power
Entry
Ø 2-1/2
4-1/4
11-1/2
Convenience
Power
Outlet
Entry
Ø 7/8
30-3/16
59
17-3/16
For Drain
Dimensions
See Detail C
6-3/16
24-3/16
LEFT
FIGURE 8 -
89
27
UNIT DIMENSIONS
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.
TABLE 6: UNIT HEIGHT
Unit Model Number
X
DF078
50 3/4
DF090
42
DF102
42
DF120
50 3/4
DETAIL B
2 -3 /8
TABLE 7: UNIT CLEARANCES
3 -3 /4
Top1
72”
Right
12”
Front2
36”
Left
36”
Rear3
36”
Bottom4
0”
3 -9 /1 6
1.
Units must be installed outdoors. Overhanging structure or shrubs should not obstruct condenser air discharge outlet.
2.
The products of combustion must not be allowed to
accumulate within a confined space and re-circulate.
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 separating the corner wall.
4.
For Baserail
Dimensions
See Detail B
FRONT
DETAIL C
5 -3 /8
Units may be installed on combustible floors made from
wood or class A, B or C roof covering materials.
DETAIL A
NOTE: If the unit includes gas heating, locate the unit so
the flue exhaust is at least:
G a s P ip e In le t
5 -1 /4
B a s e
P a n
1 7 -1 3 /1 6
V ie w o f W a ll A c r o s s fr o m
Unitary Products Group
C o il
•
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 building.
•
Four (4) feet from electric meters, gas meters, regulators, and relief equipment.
13
127083-YIM-B-0606
.
32-11/16
6-13/16
6-13/16
Supply
Air
6-13/16
Return
Air
24
27-1/2
LEFT
21
18
21-3/16
19-3/16
17-3/16
12-15/16
7-1/8
FRONT
1423/32
Bottom
Condensate
Entry
16-3/8
18-1/16
19-5/8
Bottom
Power, Control
and
Convenience
Outlet Wiring
Entries
Bottom Gas
Supply Entry
63-1/2
FIGURE 9 -
BOTTOM DUCT OPENINGS (FROM ABOVE)
18-1/4
Dot Plugs
REAR DUCT DIMENSIONS
CABINET SIZE
DIMENSION
“A”
“B”
“C”
50 3/4”
28 1/4
18 1/16
28 1/4
42”
27 3/4
12 1/16
27 1/2
Supply
Air
Return
Air
A
18-1/4
B
5-5/32
2-31/32
C
31-11/16
FIGURE 10 - REAR DUCT DIMENSIONS
14
Unitary Products Group
127083-YIM-B-0606
DUCTWORK
DUCT COVERS
Ductwork should be designed and sized according to the
methods in Manual D of the Air Conditioning Contractors of
America (ACCA) or as recommended by any other recognized authority such as ASHRAE or SMACNA.
Units are shipped with the side duct openings covered and a
covering over the bottom of the unit. For bottom duct application, 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.
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 Figure 10 for rear air duct openings.
R IG H T
8 0 -5 /8
IN 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 IO N
2 0
2 0
S U P P L Y
6
R E T U R N
2 T Y P .
3 0
IN 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 IO N
5 0 -1 /2
F R O N T
8 o r 1 4
FIGURE 11 - PREDATOR® ROOF CURB DIMENSIONS
2 T Y P
5 0 -1 /2
3 0 -1 /2
2 3
4
8 0 -5 /8
2 6
R E T U R N
S U P P L Y
1 0
7 6 -5 /8
5 9 -1 /4
9 4
F R O N T
6 4 -1 /4
R IG H T
FIGURE 12 - SUNLINE™ TO PREDATOR® TRANSITION ROOF CURBS
Unitary Products Group
15
127083-YIM-B-0606
CONDENSATE DRAIN
When fastening ductwork to side duct flanges on
unit, insert screws through duct flanges only. DO
NOT insert screws through casing. Outdoor ductwork must be insulated and water-proofed.
The side condensate drain is reversible and maybe re-oriented to the rear of the cabinet to facilitate condensate piping. A condensate drain connection is available through the
base pan for piping inside the roof curb. Trap the connection
per Figure 16. The trap and drain lines should be protected
from freezing.
Plumbing must conform to local codes. Use a sealing compound on male pipe threads. Install condensate drain line
from the 3/4 inch NPT female connection on the unit to an
open drain.
O P T IO N A L C O IL
G U A R D
3 " M in im u m
FIGURE 13 - SIDE PANELS WITH HOLE PLUGS
Note orientation. Panel is “insulation” side up.
FIGURE 16 - CONDENSATE DRAIN
COMPRESSORS
The compressors are mounted on elastomer insulators. The
mounting bolts have been fully tightened for shipping.
Do not loosen the compressor mounting bolts.
FIGURE 14 - RETURN DOWNFLOW PLENUM WITH
PANEL
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 filters reduce the capacity of the unit and result in frosted coils
or safety shutdown. Refer to Physical Data tables for the
number and size of filters needed for the unit. The unit should
not be operated without filters properly installed.
Make sure that panel latches are properly positioned
on the unit to maintain an airtight seal.
FIGURE 15 - DISCHARGE PANEL IN PLACE
16
Unitary Products Group
127083-YIM-B-0606
THERMOSTAT WIRING
The thermostat should be located on an inside wall approximately 56 inch above the floor where it will not be subject to
drafts, sun exposure or heat from electrical fixtures or appliances. Follow the manufacturer's instructions enclosed with
thermostat for general installation procedure. Seven (7) colorcoded, insulated wires should be used to connect the thermostat to the unit. Refer to Table 8 for control wire sizing and
maximum length.
TABLE 8: CONTROL WIRE SIZES
Wire Size
Maximum
18 AWG
1.
Length1
150 Feet
From the unit to the thermostat and back to the unit.
POWER AND CONTROL WIRING
Field wiring to the unit, fuses, and disconnects must conform
to provisions of National Electrical Code (NEC), ANSI/NFPA
No. 70 – Latest Edition (in U.S.A.), current Canadian Electrical Code C221, and/or local ordinances. The unit must be
electrically grounded in accordance with NEC and CEC as
specified above and/or local codes.
Voltage tolerances which must be maintained at the compressor terminals during starting and running conditions are
indicated on the unit Rating Plate and Table 1.
The internal wiring harnesses furnished with this unit are an
integral part of the design certified unit. Field alteration to
comply with electrical codes should not be required. If any of
the wire supplied with the unit must be replaced, replacement
wire must be of the type shown on the wiring diagram and the
same minimum gauge as the replaced wire.
A disconnect must be utilized for these units. Factory
installed disconnects are available. If installing a disconnect
(field supplied or York International® supplied accessory),
refer to Figure 4 for the recommended mounting location.
Unitary Products Group
Avoid damage to internal components if drilling
holes for disconnect mounting.
NOTE: Since not all local codes allow the mounting of a disconnect on the unit, please confirm compliance with
local code before mounting a disconnect on the unit.
Electrical line must be sized properly to carry the load. USE
COPPER CONDUCTORS ONLY. Each unit must be wired
with a separate branch circuit fed directly from the meter
panel and properly fused.
Refer to Figures 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.
When connecting electrical power and control wiring
to the unit, water-proof connectors must be used so
that water or moisture cannot be drawn into the unit
during normal operation. The above water-proofing
conditions will also apply when installing a field supplied disconnect switch.
POWER WIRING DETAIL
Units are factory wired for the voltage shown on the unit
nameplate. Refer to Electrical Data Tables 9 to 16 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.
17
127083-YIM-B-0606
T H E R M
T E R M
O S T A T
IN A L S
1
U N IT T E R M IN A L S
S T R IP T B 1
R C
R H
R
Y 1
Y 1
Y 2
Y 2
W
1
W
W
2
1
W
G
2
G
C
C
X 1
2 4
X
2
X 3
V o lt
T r a n s fo r m
e r
O C C
X 4
A 1
A 2
T
T
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 IF U S E D
1
2
E le c tr o n ic p r o g r a m m a b le T h e r m o s ta t 2 E T 0 7 7 0 0 1 0 0 2 4 ( in c lu d e s s u b b a s e ) .
T e r m in a ls A 1 a n d A 2 p r o v id e a r e la y o u tp u t to c lo s e th e o u td o o r
e c o n o m iz e r d a m p e r s w h e n th e th e r m o s ta t s w itc h e s to th e s e t- b a c k p o s itio n .
FIGURE 17 - ELECTRONIC THERMOSTAT FIELD WIRING
T -S T A T
W 1
W 1
W 2
W 2
Y 1
Y 1
G
G
Y 2
O C C
R H
R C
R E M O T E
M IN P O S
C
U N IT C O N T R O L
B O A R D
Y 2
X
R
S D
C
FIGURE 18 - FIELD WIRING 24 VOLT THERMOSTAT
18
Unitary Products Group
127083-YIM-B-0606
TERMINAL BLOCK TB1
FACTORY OR FIELD
SUPPLIED DISCONNECT
GROUND
LUG
THREE
PHASE
POWER
SUPPLY
FIGURE 19 - FIELD WIRING DISCONNECT - COOLING UNIT WITH/WITHOUT ELECTRIC HEAT
CONTACTOR 1M
GROUND
LUG
T1
T2
T3
L1
L2
L3
FACTORY OR FIELD
SUPPLIED DISCONNECT
THREE
PHASE
POWER
SUPPLY
FIGURE 20 - FIELD WIRING DISCONNECT - COOLING UNIT WITH GAS HEAT
Unitary Products Group
19
127083-YIM-B-0606
TABLE 9: ELECTRICAL DATA - DF078 (6-1/2 TON) MID EFFICIENCY W/O PWRD CONV. OUTLET
MCA
Supply
Pwr
Min. Circuit
Pwr
w/Power
Blower
Ampacity
Exh Conv
Electric Heater Actual Heater
Exhaust
Voltage
Motor FLA Motor Outlet
(Amps)
KW
Amps
Model No.
(Amps)
RLA
LRA
FLA
1.5
2
1.5
2
1.5
2
FLA
FLA
ea.
ea.
ea.
HP
HP
HP
HP
HP
HP
None
--33.1
35.1 38.6 40.6
2TP04520925
6.8
18.9
33.1
35.1 38.6 40.7
10.6
78.0
1.5
6.2
8.2
5.5
0.0
208
2TP04521825
13.5
37.5
54.6
57.1 61.5 64.0
2TP04522425
18.0
50.0
70.2
72.7 77.1 79.6
2TP04523625
25.5
70.8
96.2
98.7 103.1 105.6
None
--33.1
35.1 38.6 40.6
2TP04520925
9.0
21.7
34.8
37.3 41.7 44.2
10.6
78.0
1.5
6.2
8.2
5.5
0.0
230
2TP04521825
18.0
43.3
61.9
64.4 68.8 71.3
2TP04522425
24.0
57.7
79.9
82.4 86.8 89.3
2TP04523625
34.0
81.8 110.0 112.5 116.9 119.4
None
--16.4
17.4 18.6 19.6
2TP04520946
9
11.3
17.4
18.7 20.2 21.4
5.2
40.0
0.8
3.1
4.1
2.2
0.0
460
2TP04521846
18
22.6
30.9
32.2 33.7 34.9
2TP04522446
24
30.1
40
41.2 42.7
44
2TP04523646
34
42.7
55
56.2 57.7
59
None
--12.8
14
14.6 15.8
2TP04520958
9
9.0
13.8
15.3 16.1 17.6
4.1
32.0
0.6
2.4
3.6
1.8
0.0
575
2TP04521858
18
18.1
24.7
26.2 26.9 28.4
2TP04522458
24
24.1
31.9
33.4 34.1 35.6
2TP04523658
34
34.1
43.9
45.4 46.1 47.6
Maximum HACR breaker of the same AMP size is applicable.
*
Compressors
OD Fan
Motors
Max
Max Fuse* Size
Fuse*
w/Power
Size
Exhaust
(Amps)
(Amps)
1.5
2
1.5
2
HP HP
HP
HP
40 45
45
50
40 45
45
50
60 60
70
70
80 80
80
80
100 100 110
110
40 45
45
50
40 45
45
50
70 70
70
80
80 90
90
90
110 125 125
125
20 20
20
20
20 20
25
25
35 35
35
35
40 45
45
45
60 60
60
60
15 15
15
20
15 20
20
20
25 30
30
30
35 35
35
40
45 50
50
50
TABLE 10: ELECTRICAL DATA - DF078 (6-1/2 TON) MID EFFICIENCY W/PWRD CONV. OUTLET
MCA
Max
Max Fuse* Size
Supply
Pwr
Pwr
Min. Circuit
w/Power
Fuse*
w/Power
Blower
Exh Conv
Ampacity
Electric Heater Actual Heater
Exhaust
Size
Exhaust
Voltage
Motor FLA Motor Outlet
(Amps)
KW
Model No.
Amps
(Amps)
(Amps)
(Amps)
RLA
LRA
FLA
1.5
2
1.5
2
1.5
2
1.5
2
1.5
2
FLA
FLA
ea.
ea.
ea.
HP
HP
HP
HP
HP
HP
HP HP
HP
HP
None
--43.1
45.1 48.6 50.6 50 50
50
60
2TP04520925
6.8
18.9
43.8
46.3 50.7 53.2 50 50
60
60
10.6
78.0
1.5
6.2
8.2
5.5
10.0
208
2TP04521825
13.5
37.5
67.1
69.6 74.0 76.5 70 70
80
80
2TP04522425
18.0
50.0
82.7
85.2 89.6 92.1 90 90
90
100
2TP04523625
25.5
70.8 108.7 111.2 115.6 118.1 110 125 125
125
None
--43.1
45.1 48.6 50.6 50 50
50
60
2TP04520925
9.0
21.7
47.3
49.8 54.2 56.7 50 50
60
60
10.6
78.0
1.5
6.2
8.2
5.5
10.0
230
2TP04521825
18.0
43.3
74.4
76.9 81.3 83.8 80 80
90
90
2TP04522425
24.0
57.7
92.4
94.9 99.3 101.8 100 100 100
110
2TP04523625
34.0
81.8 122.5 125.0 129.4 131.9 125 125 150
150
None
--21.4
22.4 23.6 24.6 25 25
25
25
2TP04520946
9
11.3
23.7
24.9 26.4 27.7 25 25
30
30
5.2
40.0
0.8
3.1
4.1
2.2
5.0
460
2TP04521846
18
22.6
37.2
38.4 39.9 41.2 40 40
40
45
2TP04522446
24
30.1
46.2
47.5
49
50.2 50 50
50
60
2TP04523646
34
42.7
61.2
62.5
64
65.2 70 70
70
70
None
--16.8
18
18.6 19.8 20 20
20
20
2TP04520958
9
9.0
18.8
20.3 21.1 22.6 20 25
25
25
4.1
32.0
0.6
2.4
3.6
1.8
4.0
575
2TP04521858
18
18.1
29.7
31.2 31.9 33.4 30 35
35
35
2TP04522458
24
24.1
36.9
38.4 39.1 40.6 40 40
40
45
2TP04523658
34
34.1
48.9
50.4 51.1 52.6 50 60
60
60
*
Maximum HACR breaker of the same AMP size is applicable.
OD Fan
Compressors
Motors
20
Unitary Products Group
127083-YIM-B-0606
TABLE 11: ELECTRICAL DATA - DF090 (7-1/2 TON) MID EFFICIENCY W/O PWRD CONV. OUTLET
Compressors
Voltage
208
230
460
575
Supply
OD Fan
Pwr Exh
Blower Motor
Motors
Motor
FLA
RLA
LRA
FLA
ea.
ea.
ea.
12.8
12.8
5.8
5.1
84.0
84.0
42.0
34.0
1.5
1.5
0.8
0.6
2 HP
8.2
8.2
4.1
3.6
3 HP
10.9
10.9
5.3
4.1
FLA
5.5
5.5
2.2
1.8
Pwr
Conv
Outlet
Electric Heater
Model No.
Actual
KW
Min. Circuit
Heater Ampacity (Amps)
Amps
FLA
0.0
0.0
0.0
0.0
2 HP
3 HP
Max Fuse Size
Max Fuse*
MCA w/Power
w/Power Exhaust
Exhaust (Amps) Size (Amps)
(Amps)
2 HP
3 HP
2 HP 3 HP
2 HP
3 HP
None
--
--
40.0
42.7
45.5
48.2
50
50
50
60
2TP04540925
6.8
18.9
40.0
42.7
45.5
48.2
50
50
50
60
2TP04541825
13.5
37.5
57.1
60.5
64.0
67.3
60
70
70
70
2TP04542425
18.0
50.0
72.7
76.1
79.6
83.0
80
80
80
90
2TP04543625
25.5
70.8
98.7
102.1
105.6
109.0
100
110
110
110
None
--
--
40.0
42.7
45.5
48.2
50
50
50
60
2TP04540925
9.0
21.7
40.0
42.7
45.5
48.2
50
50
50
60
2TP04541825
18.0
43.3
64.4
67.8
71.3
74.6
70
70
80
80
2TP04542425
24.0
57.7
82.4
85.8
89.3
92.7
90
90
90
100
2TP04543625
34.0
81.8
112.5
115.9
119.4
122.7
125
125
125
125
None
--
--
18.8
20
21
22.2
20
25
25
25
2TP04540946
9
11.3
18.8
20.2
21.4
22.9
20
25
25
25
2TP04541846
18
22.6
32.2
33.7
34.9
36.4
35
35
35
40
2TP04542446
24
30.1
41.2
42.7
44
45.5
45
45
45
50
2TP04543646
34
42.7
56.2
57.7
59
60.5
60
60
60
70
None
--
--
16.3
16.8
18.1
18.6
20
20
20
20
2TP04540958
9
9.0
16.3
16.8
18.1
18.6
20
20
20
20
2TP04541858
18
18.1
26.2
26.8
28.4
29
30
30
30
30
2TP04542458
24
24.1
33.4
34
35.6
36.2
35
35
40
40
2TP04543658
34
34.1
45.4
46
47.6
48.3
50
50
50
50
TABLE 12: ELECTRICAL DATA - DF090 (7-1/2 TON) MID EFFICIENCY W/PWRD CONV. OUTLET
Compressors
Voltage
208
230
460
575
Supply
OD Fan
Pwr Exh
Blower Motor
Motors
Motor
FLA
RLA
LRA
FLA
2
3
ea.
ea.
ea.
HP
HP
12.8
12.8
5.8
5.1
84.0
84.0
42.0
34.0
1.5
1.5
0.8
0.6
Unitary Products Group
8.2
8.2
4.1
3.6
10.9
10.9
5.3
4.1
FLA
5.5
5.5
2.2
1.8
Pwr
Conv
Outlet
Electric Heater
Model No.
Actual
KW
Min. Circuit
Heater Ampacity (Amps)
Amps
FLA
10.0
10.0
5.0
4.0
Max Fuse Size
Max Fuse*
MCA w/Power
w/Power Exhaust
Exhaust (Amps) Size (Amps)
(Amps)
2
3
2
3
2
3
2
3
HP
HP
HP
HP
HP
HP
HP
HP
None
--
--
51.1
53.8
56.6
59.3
60
60
60
70
2TP04540925
6.8
18.9
51.1
53.8
56.6
59.3
60
60
60
70
2TP04541825
13.5
37.5
69.6
73.0
76.5
79.8
70
80
80
80
2TP04542425
18.0
50.0
85.2
88.6
92.1
95.5
90
90
100
100
2TP04543625
25.5
70.8
111.2
114.6
118.1
121.5
125
125
125
125
None
--
--
51.1
53.8
56.6
59.3
60
60
60
70
2TP04540925
9.0
21.7
51.1
53.8
56.7
60.1
60
60
60
70
2TP04541825
18.0
43.3
76.9
80.3
83.8
87.1
80
90
90
90
2TP04542425
24.0
57.7
94.9
98.3
101.8
105.2
100
100
110
110
2TP04543625
34.0
81.8
125.0
128.4
131.9
135.2
125
150
150
150
None
--
--
26.7
27.9
28.9
30.1
30
30
35
35
2TP04540946
9
11.3
26.7
27.9
28.9
30.1
30
30
35
35
2TP04541846
18
22.6
38.4
39.9
41.2
42.7
40
40
45
45
2TP04542446
24
30.1
47.5
49
50.2
51.7
50
50
60
60
2TP04543646
34
42.7
62.5
64
65.2
66.7
70
70
70
70
None
--
--
21.7
22.2
23.5
24
25
25
25
25
2TP04540958
9
9.0
21.7
22.2
23.5
24
25
25
25
25
2TP04541858
18
18.1
31.2
31.8
33.4
34
35
35
35
35
2TP04542458
24
24.1
38.4
39
40.6
41.2
40
40
45
45
2TP04543658
34
34.1
50.4
51
52.6
53.3
60
60
60
60
21
127083-YIM-B-0606
TABLE 13: ELECTRICAL DATA DF102 (8-1/2 TON) MID EFFICIENCY W/O PWRD CONVENIENCE OUTLET
Compressors
Voltage
RLA
ea.
208
230
460
575
11.7
11.7
6.4
5.1
LRA
ea.
88.0
88.0
42.0
36.0
OD Fan
Motors
FLA
ea.
3.5
3.5
1.6
1.3
Supply Blower
Motor FLA
3 HP
10.9
10.9
5.3
4.1
3 HP
10.9
10.9
5.3
4.1
Pwr
Exh
Motor
Pwr
Conv
Outlet
FLA
FLA
5.5
5.5
2.2
1.8
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)
3 HP
3 HP
3 HP
3 HP
3 HP
3 HP
3 HP
3 HP
0.0
None
2TP04540925
2TP04541825
2TP04542425
2TP04543625
-6.8
13.5
18
25.5
-18.9
37.5
50.0
70.8
44.2
44.2
60.5
76.1
102.1
44.2
44.2
60.5
76.1
102.1
49.7
49.7
67.3
83.0
109.0
49.7
49.7
67.3
83.0
109.0
50
50
70
80
110
50
50
70
80
110
60
60
70
90
110
60
60
70
90
110
0.0
None
2TP04540925
2TP04541825
2TP04542425
2TP04543625
-9
18
24
34
-21.7
43.3
57.7
81.8
44.2
44.2
67.8
85.8
115.9
44.2
44.2
67.8
85.8
115.9
50.4
50.4
74.6
92.7
122.7
50.4
50.4
74.6
92.7
122.7
50
50
70
90
125
50
50
70
90
125
60
60
80
100
125
60
60
80
100
125
0.0
None
2TP04540946
2TP04541846
2TP04542446
2TP04543646
-9
18
24
34
-11.3
22.6
30.1
42.7
22.9
22.9
33.7
42.7
57.7
22.9
22.9
33.7
42.7
57.7
25.1
25.1
36.4
45.5
60.5
25.1
25.1
36.4
45.5
60.5
25
25
35
45
60
25
25
35
45
60
30
30
40
50
70
30
30
40
50
70
0.0
None
2TP04540958
2TP04541858
2TP04542458
2TP04543658
-9
18
24
34
-9.0
18.1
24.1
34.1
18.2
18.2
26.8
34
46
18.2
18.2
26.8
34
46
20
20
29
36.2
48.3
20
20
29
36.2
48.3
20
20
30
35
50
20
20
30
35
50
25
25
30
40
50
25
25
30
40
50
TABLE 14: ELECTRICAL DATA DF102 (8-1/2 TON) MID EFFICIENCY WITH PWRD CONVENIENCE OUTLET
Compressors
Voltage
208
230
460
575
22
OD Fan
Motors
RLA
LRA
FLA
ea.
ea.
ea.
11.7
11.7
6.4
5.1
88.0
88.0
42.0
36.0
3.5
3.5
1.6
1.3
Supply Blower
Motor FLA
3 HP
10.9
10.9
5.3
4.1
3 HP
10.9
10.9
5.3
4.1
Pwr
Exh
Motor
Pwr
Conv
Outlet
FLA
FLA
5.5
5.5
2.2
1.8
10.0
10.0
10.0
10.0
Electric Heater
Model No.
Actual
KW
Heater
Amps
Min. Circuit
Ampacity
(Amps)
3 HP
3 HP
MCA w/Power
Exhaust
(Amps)
3 HP
3 HP
Max Fuse*
Size (Amps)
3 HP
3 HP
Max Fuse Size
w/Power
Exhaust
(Amps)
3 HP
3 HP
None
--
--
54.2
54.2
59.7
59.7
60
60
70
70
2TP04540925
6.8
18.9
54.2
54.2
59.7
59.7
60
60
70
70
2TP04541825
13.5
37.5
73.0
73.0
79.8
79.8
80
80
80
80
2TP04542425
2TP04543625
18
25.5
50.0
70.8
88.6
114.6
88.6
114.6
95.5
121.5
95.5
121.5
90
125
90
125
100
125
100
125
None
--
--
54.2
54.2
59.7
59.7
60
60
70
70
2TP04540925
9
21.7
54.2
54.2
59.7
59.7
60
60
70
70
2TP04541825
18
43.3
80.3
80.3
87.1
87.1
90
90
90
90
2TP04542425
2TP04543625
24
34
57.7
81.8
98.3
128.4
98.3
128.4
105.2
135.2
105.2
135.2
100
150
100
150
110
150
110
150
None
--
--
27.9
27.9
30.1
30.1
30
30
35
35
2TP04540946
9
11.3
27.9
27.9
30.1
30.1
30
30
35
35
2TP04541846
18
22.6
39.9
39.9
42.7
42.7
40
40
45
45
2TP04542446
2TP04543646
24
34
30.1
42.7
49
64
49
64
51.7
66.7
51.7
66.7
50
70
50
70
60
70
60
70
None
--
--
22.2
22.2
24
24
25
25
25
25
2TP04540958
9
9.0
22.2
22.2
24
24
25
25
25
25
2TP04541858
18
18.1
31.8
31.8
34
34
35
35
35
35
2TP04542458
2TP04543658
24
34
24.1
34.1
39
51
39
51
41.2
53.3
41.2
53.3
40
60
40
60
45
60
45
60
Unitary Products Group
127083-YIM-B-0606
TABLE 15: ELECTRICAL DATA - DF120 (10 TON) MID EFFICIENCY W/O PWRD CONV. OUTLET
Supply
Pwr
Min. Circuit
Pwr
Blower
Exh Conv
Ampacity
Electric Heater Actual Heater
Voltage
Motor FLA Motor Outlet
(Amps)
Amps
KW
Model No.
RLA
LRA
FLA
2
3
2
3
FLA
FLA
ea.
ea.
ea.
HP
HP
HP
HP
None
--51.2
53.9
2TP04521825
13.5
37.5
57.1
60.5
16.0 137.0
3.5
8.2 10.9
5.5
0.0
208
2TP04522425
18.0
50.0
72.7
76.1
2TP04523625
25.5
70.8
98.7 102.1
2TP04525425
40.6
112.7 151.1 154.5
None
--51.2
53.9
2TP04521825
18.0
43.3
64.4
67.8
16.0 137.0
3.5
8.2 10.9
0.0
5.5
230
2TP04522425
24.0
57.7
82.4
85.8
2TP04523625
34.0
81.8 112.5 115.9
2TP04525425
54.0
129.9 140.2 143.5
None
--26
27.2
2TP04521846
18
22.6
32.2
33.7
8.3
69.0
1.6
4.1
5.3
2.2
0.0
460
2TP04522446
24
30.1
41.2
42.7
2TP04523646
34
42.7
56.2
57.7
2TP04525446
54
67.8
70.1
71.6
None
--20.6
21.1
2TP04521858
18
18.1
26.2
26.8
6.4
58.0
1.3
3.6
4.1
1.8
0.0
575
2TP04522458
24
24.1
33.4
34
2TP04523658
34
34.1
45.4
46
2TP04525458
54
54.2
56.5
57.1
*
Maximum HACR breaker of the same AMP size is applicable.
Compressors
OD Fan
Motors
MCA
w/Power
Exhaust
(Amps)
2
3
HP
HP
56.7 59.4
64.0 67.3
79.6 83.0
105.6 109.0
158.0 161.4
56.7 59.4
71.3 74.6
89.3 92.7
119.4 122.7
147.0 150.4
28.2 29.4
34.9 36.4
44
45.5
59
60.5
72.8 74.3
22.4 22.9
28.4
29
35.6 36.2
47.6 48.3
58.7 59.3
Max
Max Fuse* Size
Fuse*
w/Power
Size
Exhaust
(Amps)
(Amps)
2
3
2
3
HP HP
HP
HP
60 60
70
70
60 70
70
70
80 80
80
90
100 110 110
110
175 175 175
175
60 60
70
70
70 70
80
80
90 90
90
100
125 125 125
125
150 175 175
175
30 35
35
35
35 35
35
40
45 45
45
50
60 60
60
70
80 80
80
80
25 25
25
25
30 30
30
30
35 35
40
40
50 50
50
50
70 70
70
70
TABLE 16: ELECTRICAL DATA - DF120 (10 TON) MID EFFICIENCY W/PWRD CONV. OUTLET
Supply
Pwr
Pwr
Blower
Exh Conv
Electric Heater Actual Heater
Voltage
Motor FLA Motor Outlet
KW
Model No.
Amps
RLA
LRA
FLA
2
3
FLA
FLA
ea.
ea.
ea.
HP
HP
None
--2TP04521825
13.5
37.5
16.0 137.0
3.5
8.2 10.9
5.5
10.0
208
2TP04522425
18.0
50.0
2TP04523625
25.5
70.8
2TP04525425
40.6
112.7
None
--2TP04521825
18.0
43.3
16.0 137.0
3.5
8.2 10.9
5.5
10.0
230
2TP04522425
24.0
57.7
2TP04523625
34.0
81.8
2TP04525425
54.0
129.9
None
--2TP04521846
18
22.6
8.3
69.0
1.6
4.1
5.3
2.2
5.0
460
2TP04522446
24
30.1
2TP04523646
34
42.7
2TP04525446
54
67.8
None
--2TP04521858
18
18.1
6.4
58.0
1.3
3.6
4.1
1.8
4.0
575
2TP04522458
24
24.1
2TP04523658
34
34.1
2TP04525458
54
54.2
*
Maximum HACR breaker of the same AMP size is applicable.
Compressors
OD Fan
Motors
Unitary Products Group
Min. Circuit
Ampacity
(Amps)
2
HP
61.2
69.6
85.2
111.2
163.6
61.2
76.9
94.9
125.0
152.7
31
38.4
47.5
62.5
76.3
24.6
31.2
38.4
50.4
61.5
3
HP
63.9
73.0
88.6
114.6
167.0
63.9
80.3
98.3
128.4
156.0
32.2
39.9
49
64
77.8
25.1
31.8
39
51
62.1
MCA
w/Power
Exhaust
(Amps)
2
3
HP
HP
66.7 69.4
76.5 79.8
92.1 95.5
118.1 121.5
170.5 173.9
66.7 69.4
83.8 87.1
101.8 105.2
131.9 135.2
159.5 162.9
33.2 34.4
41.2 42.7
50.2 51.7
65.2 66.7
79.1 80.6
26.4 26.9
33.4
34
40.6 41.2
52.6 53.3
63.7 64.3
Max
Max Fuse* Size
Fuse*
w/Power
Size
Exhaust
(Amps)
(Amps)
2
3
2
3
HP HP
HP
HP
70 70
80
80
70 80
80
80
90 90
100
100
125 125 125
125
175 175 175
175
70 70
80
80
80 90
90
90
100 100 110
110
125 150 150
150
175 175 175
175
35 40
40
40
40 40
45
45
50 50
60
60
70 70
70
70
90 90
90
90
30 30
30
30
35 35
35
35
40 40
45
45
60 60
60
60
70 70
70
70
23
127083-YIM-B-0606
TABLE 17: DF PHYSICAL DATA
Models
Component
Evaporator
Blower
078
090
102
120
Blower, Centrifugal (Dia. X Wd. in.)
15 x 15
12 x 12
12 x 12
15 x 15
Motor, Standard (HP)
1.5
2
3
2
Motor, Optional (HP)
2
3
3
3
Evaporator
Coil
Condenser
Fan
(2 per Unit)
Condenser
Coil
(2 per unit)
Rows
3
3
3
4
Fins per Inch
15
15
15
15
Height (in.)
32
32
32
40
Face Area (ft.2)
10.67
10.67
10.67
13.2
Propeller Dia. (in.)
24
24
24
24
Motor (HP, each)
1/3
1/3
3/4
3/4
CFM, Nominal (each)
3400
3400
4400
4400
Rows
1
1
Fins per Inch
20
20
20
20
Height (in.)
44
36
36
44
2)
14.5
12
12
14.5
System 1 (lb/oz)
6/12
5/4
9/12
11/1
System 2 (lb/oz)
6/4
5/0
5/6
11/1
Quantity
2
2
2
2
Face Area (ft.
Refrigerant
Charge
Compressors
Air Filters
Sys 1: 2 Row
2
Sys 2: 1 Row
Type
Recip
Recip
Recip
Recip
Size (Wd. x Ht. x Thickness in.)
25x20x2
25x16x2
25x16x2
25x20x2
Number Per Unit
4
4
4
4
OPTIONAL ELECTRIC HEAT
TABLE 18: MINIMUM SUPPLY AIR CFM
The factory-installed heaters are wired for single point power
supply. Power supply need only be brought into the single
point terminal block.
Heater
9
1950
2250
2550
N/A
These CSA approved heaters are located within the central
compartment of the unit with the heater elements extending
into the supply air chamber.
18
1950
2250
2550
3000
1950
2250
2550
3000
1950
2250
2550
3000
54
N/A
N/A
N/A
3000
9
1950
2250
2550
N/A
18
1950
2250
2550
3000
Fuses are supplied, where required, by the factory. Some kW
sizes require fuses and others do not. refer to Table 18 for
minimum CFM limitations and to Tables 9 through 16 for electrical data.
kW
24
36
24
Voltage
208/
230
480
078 (6.5)
090 (7.5)
102 (8.5)
120 (10)
Minimum Supply Air CFM
1950
2250
2550
3000
36
1950
2250
2550
3000
54
N/A
N/A
N/A
3000
9
1950
2250
2550
N/A
18
1950
2250
2550
3000
24
24
Unit Model Size (Nominal Tons)
600
1950
2250
2550
3000
36
1950
2250
2550
3000
54
N/A
N/A
N/A
3000
Unitary Products Group
127083-YIM-B-0606
OPTIONAL GAS HEAT
These gas-fired heaters have aluminized-steel or optional
stainless steel, tubular heat exchangers with spark ignition.
OPTIONAL
COIL
GUARD
SHOWN
TABLE 19: GAS APPLICATION DATA
Unit
Size
078
090
102
120
Input (MBH)
Output (MBH)
Temp Rise
(°F)
10
120
96
20-50
15
180
144
35-65
10
120
96
15-45
15
180
144
30-60
10
120
96
15-45
Opt.
15
180
144
30-60
15
180
144
20-50
20
240
192
30-60
GAS PIPING
Proper sizing of gas piping depends on the cubic feet per
hour of gas flow required, specific gravity of the gas and the
length of run. "National Fuel Gas Code" Z223.1 (in U.S.A.) or
the current Gas Installation Codes CSA-B149.1 (in Canada)
should be followed in all cases unless superseded by local
codes or gas utility requirements. Refer to the Pipe Sizing
Table 20. The heating value of the gas may differ with locality.
The value should be checked with the local gas utility.
NOTE: There may be a local gas utility requirement specifying a minimum diameter for gas piping. All units
require a one-inch pipe connection at the entrance
fitting.
O P
C O
G U
S H
T IO N A L
IL
A R D
O W N
FIGURE 22 - BOTTOM ENTRY GAS PIPING
TABLE 20: GAS PIPE SIZING - CAPACITY OF PIPE
Nominal Iron Pipe Size
Length of
Pipe (ft.)
3/4 in.
1 in.
1-1/4 in.
10
278
520
1050
20
190
350
730
30
152
285
590
40
130
245
500
50
115
215
440
60
105
195
400
70
96
180
370
80
90
170
350
90
84
160
320
100
79
150
305
NOTE: Maximum capacity of pipe in cubic feet of gas per
hour based upon a pressure drop of 0.3 inch W.C.
and 0.6 specific gravity gas.
NOTE: There may be a local gas utility requirement specifying a minimum diameter for gas piping. All units
require a 3/4 inch pipe connection at the entrance
fitting. Line should not be sized smaller than the
entrance fitting size.
GAS CONNECTION
FIGURE 21 - SIDE ENTRY GAS PIPING
Unitary Products Group
The gas supply line can be routed within the space and roof
curb, exiting through the unit’s basepan. Refer to Figure 9 for
the gas piping inlet location. Typical supply piping arrangements are shown in Figures 21 and 22. All pipe nipples, fit-
25
127083-YIM-B-0606
tings, and the gas cock are field supplied or may be
purchased in UPG accessory kit #1GP0405.
Gas piping recommendations:
1.
A drip leg and a ground joint union must be installed in
the gas piping.
2.
Where required by local codes, a manual shut-off valve
must be installed outside of the unit.
3.
Use wrought iron or steel pipe for all gas lines. Pipe dope
should be applied sparingly to male threads only.
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 shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less
than 1/2 PSIG.
Natural gas may contain some propane. Propane is
an excellent solvent and will quickly dissolve white
lead and most standard commercial compounds. A
special pipe dope must be used when assembling
wrought iron or steel pipe. Shellac based compounds such as Gaskolac or Stalastic, and compounds such as Rectorseal #5, Clydes’s or John
Crane may be used.
4.
All piping should be cleaned of dirt and scale by hammering on the outside of the pipe and blowing out loose
particles. Before initial start-up, be sure that all gas lines
external to the unit have been purged of air.
5.
The gas supply should be a separate line and installed in
accordance with all safety codes as prescribed under
“Limitations”.
6.
A 1/8-inch NPT plugged tapping, accessible for test gage
connection, must be installed immediately upstream of
the gas supply connection to the unit.
7.
After the gas connections have been completed, open
the main shut-off valve admitting normal gas pressure to
the mains. Check all joints for leaks with soap solution or
other material suitable for the purpose. NEVER USE A
FLAME.
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warning exactly could
result in serious injury, death or property damage.
Never test for gas leaks with an open flame. use a
commercially available soap solution made specifically for the detection of leaks to check all connections. A fire or explosion may result causing property
damage, personal injury or loss of life.
26
Threaded joints should be coated with a sealing
compound that is resistant to the action of liquefied
petroleum gases. Do not use Teflon tape.
LP UNITS, TANKS AND PIPING
All gas heat units are shipped from the factory equipped for
natural gas use only. The unit may be converted in the field
for use with LP gas with accessory kit model number
1NP0442.
All LP gas equipment must conform to the safety standards of
the National Fire Protection Association.
For satisfactory operation, LP gas pressure must be 10.5
inch W.C. at the unit under full load. Maintaining proper gas
pressure depends on three main factors:
1.
The vaporization rate which depends on the temperature
of the liquid and the “wetted surface” area of the container(s).
2.
The proper pressure regulation. (Two-stage regulation is
recommended).
3.
The pressure drop in the lines between regulators and
between the second stage regulator and the appliance.
Pipe size required will depend on the length of the pipe
run and the total load of all appliances.
Complete information regarding tank sizing for vaporization,
recommended regulator settings, and pipe sizing is available
from most regulator manufacturers and LP gas suppliers.
LP gas is an excellent solvent and will quickly dissolve white
lead and most standard commercial compounds. A special
Unitary Products Group
127083-YIM-B-0606
pipe dope must be used when assembling wrought iron or
steel pipe for LP. Shellac base compounds such as Gaskolac
or Stalastic, and compounds such as Rectorseal #5, Clyde’s,
or John Crane may be used.
There are two Economizer options:
1.
Down Flow application with barometric relief hood standard.
Check all connections for leaks when piping is completed
using a soap solution. NEVER USE A FLAME.
2.
Horizontal Flow application that requires the purchase of
a barometric relief hood.
POWER EXHAUST
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warning exactly could
result in serious injury, death or property damage.
Never test for gas leaks with an open flame. use a
commercially available soap solution made specifically for the detection of leaks to check all connections. A fire or explosion may result causing property
damage, personal injury or loss of life.
The Power Exhaust can be a factory installed option or a field
installed accessory. If factory installed, refer to the instructions included with the outdoor air hood to complete the
assembly. Field installed Power Exhaust accessories include
complete instructions for installation.
The Power Exhaust factory installed option is for Down Flow
application only.
There are two field installed Power Exhaust accessories:
1.
Down Flow application.
VENT AND COMBUSTION AIR
2.
Venting slots in the heating compartment access panel
remove the need for a combustion air hood. The gas heat
flue exhaust is routed through factory installed exhaust piping
with screen. If necessary, a flue exhaust extension may be
installed at the point of installation.
Horizontal Flow application that requires the purchase of
a barometric relief hood.
RAIN HOOD
OPTIONS/ACCESSORIES
ELECTRIC HEAT
Electric heaters are available as factory-installed options or
field-installed accessories. Refer to electric heat instructions
for installation. These heaters mount in the heat compartment
with the heating elements extending into the supply air chamber. All electric heaters are fused and intended for use with
single point power supply.
All of the hood components, including the filters, the gasketing and the hardware for assembling, are packaged and
located between the condenser coil section and the main unit
cabinet, if the unit has factory installed options. If field
installed accessories are being installed all parts necessary
for the installation comes in the accessory.
ECONOMIZER AND POWER EXHAUST SET POINT
ADJUSTMENTS AND INFORMATION
Remove the top rear access panel from the unit. Locate the
economizer control module, where the following adjustments
will be made.
MOTORIZED OUTDOOR DAMPER
The Motorized Outdoor Damper can be a factory installed
option or a field installed accessory. If factory installed, refer
to the instructions included with the outdoor air hood to complete the assembly. Field installed Motorized Outdoor
Damper accessories include complete instructions for installation.
ECONOMIZER
The Economizer can be a factory installed option or a field
installed accessory. If factory installed, refer to the instructions included with the outdoor air hood to complete the
assembly. Field installed Economizer accessories include
complete instructions for installation.
Unitary Products Group
Extreme care must be exercised in turning all set
point, maximum and minimum damper positioning
adjustment screws to prevent twisting them off.
MINIMUM POSITION ADJUSTMENT
•
Check that the damper blades move smoothly without
binding; carefully turn the Minimum Position Adjust
screw (found on the damper control module) fully clockwise and then set the thermostat indoor fan switch to the
ON position and then OFF or energize and de-energize
terminals “R” to “G”.
27
127083-YIM-B-0606
•
With the thermostat set to the indoor fan ON position or
terminals “R” to “G” energized, turn the Minimum Position Adjusting screw (located on the damper control
module) counterclockwise until the desired minimum
damper position has been attained.
power exhaust comes on is determined by the economizer damper position (Percent Open). The Exhaust Air
Adjustment Screw should be set at the Percent Open of
the economizer damper at which the power exhaust is
needed. It can be set from 0 to 100% damper open.
ENTHALPY SET POINT ADJUSTMENT
INDOOR AIR QUALITY AQ
The enthalpy set point may now be set by selecting the
desired set point shown in the Enthalpy Set Point Adjustment
Figure 23. Adjust as follows:
Indoor Air Quality (indoor sensor input): Terminal AQ accepts
a +2 to +10 Vdc signal with respect to the (AQ1) terminal.
When the signal is below it's set point, the actuator is allowed
to modulate normally in accordance with the enthalpy and
mixed air sensor inputs. When the AQ signal exceeds it's set
point setting and there is no call for free cooling, the actuator
is proportionately modulated from the 2 to 10 Vdc signal, with
2 Vdc corresponding to full closed and 10 Vdc corresponding
to full open. When there is no call for free cooling, the damper
position is limited by the IAQ Max damper position setting.
When the signal exceeds it's set point (Demand Control Ventilation Set Point) setting and there is a call for free cooling,
the actuator modulates from the minimum position to the full
open position based on the highest call from either the mixed
air sensor input or the AQ voltage input.
•
For a single enthalpy operation carefully turn the set
point adjusting screw (found on the damper control module) to the "A", "B", "C" or "D" setting corresponding to
the lettered curve of the Enthalpy Set Point Adjustment
Figure 23.
•
For a dual enthalpy operation, carefully turn the set point
adjusting screw fully clockwise past the "D" setting.
POWER EXHAUST DAMPER SET POINT (WITH OR WITHOUT POWER EXHAUST)
•
•
28
With no power exhaust option, adjust the Exhaust Air
Adjustment Screw fully clockwise. This will allow 2nd
stage cooling to operate.
With power exhaust option, each building pressurization
requirement will be different. The point at which the
•
Optional CO2 Space Sensor Kit Part # 2AQ04700324
•
Optional CO2 Sensor Kit Part # 2AQ04700424
Replace the top rear access panel on the unit.
Unitary Products Group
127083-YIM-B-0606
CONTROL
CURVE
CONTROL POINT
APPROX. 0F (0C)
AT 50% RH
A
73 (23)
B
C
70 (21)
67 (19)
D
63 (17)
85 90 95 100 105 110
(29) (32) (35) (38) (41) (43)
80
(27)
75
(24)
70
(21)
65
(18)
60
(16)
55
(13)
50
(10)
45
(7)
35
(2)
A
B
C
D
40
(4)
B A
D C
35
(2)
40 45 50 55 60 65 70 75 80 85 90 95 100 105 110
(4) (7) (10) (13) (16) (18) (21) (24) (27) (29) (32) (35) (38) (41) (43)
APPROXIMATE DRY BULB TEMPERATURE - 0F (0C)
FIGURE 23 - ENTHALPY SET POINT CHART
Exhaust Air
Adjustment
Screw
Exhaust Air LED
Damper Min.
Position
Screw
Indoor Air Quality
Max. Adjustment
Screw
N1
N
EXH
Set
TR
P1
P
EXH
24
Vac
HOT
T1
T
Min
Pos
IAQ
Max
Indoor Air Quality
LED
AQ1
AQ
IAQ
SO
IAQ
Min
TR1
24
Vac
COM
+
1
2
5
Indoor Air Quality
Min. Adjustment
Screw
Free Cooling LED
SO+
3
4
EF
EF1
Free
Cool
SR+
SR
B
A
C
D
Economizer Enthalpy
Set Point Adjustment
Screw
FIGURE 24 - HONEYWELL ECONOMIZER CONTROL W7212
Unitary Products Group
29
127083-YIM-B-0606
PHASING
A
Predator® units are properly phased at the factory. Check for
proper compressor rotation. If the blower or compressors
rotate in the wrong direction at start-up, the electrical connection to the unit is misphased. Change the phasing of the Field
Line Connection at the factory or field supplied disconnect to obtain proper rotation. (Scroll compressors operate in
only one direction. If the scroll is drawing low amperage, has
similar suction and discharge pressures, or producing a high
noise level, the scroll is misphased.)
A
C*
* NEVER LOOSEN
A
B
SPAN LENGTH
Scroll compressors require proper rotation to operate correctly. Units are properly phased at the factory. Do not change the internal wiring to make the
blower condenser fans, or compressor rotate correctly.
DEFL. FORCE
TABLE 21: SUPPLY AIR LIMITATIONS
Unit Size
Minimum
Maximum
078
1950
3250
090
2250
3750
102
2550
4250
120
3000
5000
FIGURE 25 - BELT ADJUSTMENT
Procedure for adjusting belt tension:
BELT TENSION
The tension on the belt should be adjusted as shown in Figure 25.
1.
2.
3.
4.
Loosen six nuts (top and bottom) A.
Adjust by turning (B).
Never loosen nuts (C).
Use belt tension checker to apply a perpendicular
force to one belt at the midpoint of the span as
shown. Deflection distance of 4mm (5/32”) is
obtained.
To determine the deflection distance from normal
position, use a straight edge from sheave to sheave
as reference line. The recommended deflection
force is as follows:
Tension new belts at the max. deflection force recommended for the belt section. Check the belt tension at least two times during the first 24 hours of
operation. Any retensioning should fall between the
min. and max. deflection force values.
5. After adjusting retighten nuts (A).
30
Unitary Products Group
127083-YIM-B-0606
TABLE 22: DF078 (6-1/2 TON) STANDARD MOTOR DOWN SHOT BLOWER PERFORMANCE1 2
TURNS OPEN4
ESP3
0
1
2
3
4
CFM
W5
BHP
W5
W5
CFM
W5
W5
CFM
BHP
CFM
BHP
BHP
CFM
5
BHP
CFM
W5
BHP
0.2
-
-
-
-
-
-
3291
1191
1.28
3096
1059
1.14
2963
948
1.02
2757
831
0.89
0.4
-
-
-
3168
1225
1.31
2969
1085
1.16
2658
939
1.01
2535
834
0.89
2255
718
0.77
0.6
3223
1273
1.37
2732
1084
1.16
2500
947
1.02
2110
803
0.86
1923
699
0.75
1608
596
0.64
0.8
2541
1091
1.17
2168
925
0.99
1882
793
0.85
-
-
-
-
-
-
-
-
-
1.0
1859
908
0.97
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
2.
Blower performance includes two-inch throwaway filters.
3.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
4.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
5.
W = Watts
TABLE 23: DF078 (6-1/2 TON) OPTIONAL MOTOR DOWN SHOT BLOWER PERFORMANCE1 2
TURNS OPEN4
ESP3
0
1
2
3
4
5
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
0.4
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3489
1553
1.67
0.6
-
-
-
-
-
-
-
-
-
-
-
-
3394
1641
1.76
3101
1407
1.51
0.8
-
-
-
-
-
-
3623
2009
2.15
3323
1742
1.87
2971
1477
1.58
2607
1241
1.33
1.0
-
-
-
3643
2150
2.31
3224
1820
1.95
2889
1569
1.68
2466
1306
1.40
2009
1071
1.15
1.2
3613
2238
2.40
3143
1917
2.06
2748
1621
1.74
2369
1385
1.49
1879
1141
1.22
-
-
-
1.4
3099
2039
2.19
2636
1711
1.83
2195
1424
1.53
-
-
-
-
-
-
-
-
-
1.6
2586
1833
1.97
2124
1532
1.64
-
-
-
-
-
-
-
-
-
-
-
-
1.8
2073
1621
1.74
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
2.
Blower performance includes two-inch throwaway filters.
3.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
4.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
5.
W = Watts
Unitary Products Group
31
127083-YIM-B-0606
TABLE 24: DF090 (7-1/2 TON) STANDARD MOTOR DOWN SHOT BLOWER PERFORMANCE
7851623(1
(63
&)0
7XUQV
530 :
%+3
&)0
7XUQ
530 :
%+3
&)0
7XUQV
530 :
%+3
&)0
7XUQV
530 :
%+3
&)0
7XUQV
530 :
%+3
7XUQV
&)0 530 :
%+3
%ORZHUSHUIRUPDQFHIRUJDVKHDWLQFOXGHVPD[LPXPQXPEHURIKHDWWXEHVDYDLODEOHIRUHDFKWRQQDJH
%ORZHUSHUIRUPDQFHLQFOXGHVWZRLQFKWKURZDZD\ILOWHUV
(63([WHUQDO6WDWLF3UHVVXUHJLYHQLVWKDWDYDLODEOHIRUWKHVXSSO\DQGUHWXUQDLUGXFWV\VWHP$OOLQWHUQDOUHVLVWDQFHVKDYHEHHQ
GHGXFWHGIURPWKHWRWDOVWDWLFSUHVVXUHRIWKHEORZHU
³7XUQV2SHQ´UHIHUVWRWKHVHWWLQJRIWKHYDULDEOHSLWFKPRWRUVKHDYHZKHUH³7XUQV2SHQ´LVIXOO\FORVHG
: :DWWV
72167$1'$5'02725'2:16+27%/2:(53(5)250$1&(
([WHUQDO6WDWLF´:&
7XUQV
7XUQV
7XUQV
7XUQV
7XUQ
7XUQV
&)0
32
Unitary Products Group
127083-YIM-B-0606
TABLE 25: DF090 (7-1/2 TON) OPTIONAL MOTOR DOWN SHOT BLOWER PERFORMANCE
4
ESP3
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
CFM
3995
3718
3506
3290
3065
2799
2401
1940
0 Turns
5
RPM W
1299 2790
1303 2580
1305 2440
1308 2290
1312 2167
1315 1977
1320 1775
1325 1514
BHP
3.0
2.8
2.6
2.5
2.3
2.1
1.9
1.6
CFM
3765
3508
3288
3053
2795
2458
2098
-
1 Turn
5
RPM W
1249 2420
1252 2290
1255 2117
1258 1982
1261 1844
1264 1675
1269 1487
-
BHP
2.6
2.5
2.3
2.1
2.0
1.8
1.6
-
CFM
3619
3353
3107
2858
2558
2223
-
TURNS OPEN
2 Turns
5
RPM W BHP CFM
1198 2147 2.3 3399
1201 2010 2.2 3131
1203 1862 2.0 2876
1206 1712 1.8 2594
1209 1602 1.7 2259
1212 1408 1.5 1780
-
3 Turns
5
RPM W
1144 1849
1147 1715
1149 1603
1152 1487
1155 1318
1159 1084
-
BHP
2.0
1.8
1.7
1.6
1.4
1.2
-
CFM
3223
2945
2666
2334
1954
-
4 Turns
5
RPM W
1092 1630
1094 1525
1096 1368
1099 1248
1101 1095
-
BHP
1.7
1.6
1.5
1.3
1.2
-
CFM
3002
2715
2418
2049
-
5 Turns
5
RPM W
1038 1421
1039 1328
1042 1206
1044 1037
-
BHP
1.5
1.4
1.3
1.1
-
1. Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
2. Blower performance includes two-inch throwaway filters.
3. ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
4. “Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
5. W = Watts
7-1/2 TON OPTIONAL MOTOR DOWN SHOT BLOWER PERFORMANCE
1.8
1.6
External Static ("WC)
1.4
1.2
1
0.8
0.6
0.4
0.2
5 Turns
0
1700
2200
2700
4 Turns
3200
3 Turns
2 Turns
3700
1 Turn
0 Turns
4200
CFM
Unitary Products Group
33
127083-YIM-B-0606
TABLE 26: DF102 (8-1/2 TON) STANDARD MOTOR DOWN SHOT BLOWER PERFORMANCE
(63
&)0
7XUQV
530 :
%+3
&)0
7XUQ
530 :
%+3
&)0
7851623(1
7XUQV
530 : %+3 &)0
7XUQV
530 :
%+3
&)0
7XUQV
530 :
%+3
&)0
7XUQV
530 :
%+3
%ORZHUSHUIRUPDQFHIRUJDVKHDWLQFOXGHVPD[LPXPQXPEHURIKHDWWXEHVDYDLODEOHIRUHDFKWRQQDJH
%ORZHUSHUIRUPDQFHLQFOXGHVWZRLQFKWKURZDZD\ILOWHUV
(63([WHUQDO6WDWLF3UHVVXUHJLYHQLVWKDWDYDLODEOHIRUWKHVXSSO\DQGUHWXUQDLUGXFWV\VWHP$OOLQWHUQDOUHVLVWDQFHVKDYHEHHQ
GHGXFWHGIURPWKHWRWDOVWDWLFSUHVVXUHRIWKHEORZHU
³7XUQV2SHQ´UHIHUVWRWKHVHWWLQJRIWKHYDULDEOHSLWFKPRWRUVKHDYHZKHUH³7XUQV2SHQ´LVIXOO\FORVHG
: :DWWV
72167$1'$5'02725'2:16+27%/2:(53(5)250$1&(
([WHUQDO6WDWLF:&
7XUQV
7XUQV
7XUQV
7XUQV
7XUQ
7XUQV
&)0
34
Unitary Products Group
127083-YIM-B-0606
TABLE 27: DF102 (8-1/2 TON) OPTIONAL DRIVE DOWN SHOT BLOWER PERFORMANCE
TURNS OPEN4
3
ESP
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
CFM
4073
3841
3627
3404
3182
2935
2615
2294
1808
0 Turns
5
RPM W
1346 2930
1351 2910
1354 2800
1358 2570
1362 2540
1367 2290
1371 2150
1375 2010
1382 1390
BHP
3.1
3.1
3.0
2.8
2.7
2.5
2.3
2.2
1.5
CFM
3897
3632
3425
3226
2975
2685
2409
1970
–
1 Turn
5
RPM W
1296 2700
1301 2470
1304 2360
1308 2230
1312 2030
1317 2000
1319 1690
1325 1430
–
–
BHP
2.9
2.6
2.4
2.4
2.2
2.1
1.8
1.5
–
CFM
3732
3460
3267
3047
2778
2462
2106
–
–
2 Turns
5
RPM W
1245 2390
1248 2270
1251 2090
1254 2000
1257 1790
1261 1630
1265 1470
–
–
–
–
BHP
2.6
2.4
2.2
2.1
1.9
1.7
1.6
–
–
CFM
3598
3324
3085
2820
2478
2160
1407
–
–
3 Turns
5
RPM W
1191 2100
1194 1930
1197 1800
1200 1670
1203 1550
1206 1380
1213 1000
–
–
–
–
BHP
2.2
2.1
1.9
1.8
1.7
1.5
1.0
–
–
CFM
3445
3168
2904
2585
2241
1729
–
–
–
4 Turns
5
RPM W
1136 1800
1138 1680
1141 1550
1144 1490
1147 1270
1151 1040
–
–
–
–
–
–
BHP
2.0
1.8
1.7
1.6
1.4
1.1
–
–
–
CFM
3209
2922
2638
2258
1811
–
–
–
–
5 Turns
5
RPM W
1078 1600
1081 1470
1082 1370
1085 1260
1088 1110
–
–
–
–
–
–
–
–
BHP
1.8
1.6
1.5
1.4
1.2
–
–
–
–
1. Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
2. Blower performance includes two-inch throwaway filters.
3. ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
4. “Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
5. W = Watts
8-1/2 TON OPTIONAL DRIVE DOWN SHOT BLOWER PERFORMANCE
2
1.8
External Static ("WC)
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
5 Turns 4 Turns 3 Turns 2 Turns 1 Turn
0
1000
1500
2000
2500
3000
3500
4000
0 Turns
4500
CFM
Unitary Products Group
35
127083-YIM-B-0606
TABLE 28: DF120 (10 TON) STANDARD MOTOR DOWN SHOT BLOWER PERFORMANCE1 2
TURNS OPEN4
ESP3
0
1
2
3
4
5
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
0.2
-
-
-
-
-
-
-
-
-
3896
1639
1.76
3688
1453
1.56
3447
1268
1.36
0.4
4040
2076
2.23
4005
1934
2.07
3790
1698
1.82
3569
1508
1.62
3333
1330
1.43
3057
1147
1.23
0.6
3890
2006
2.15
3697
1790
1.92
3427
1550
1.66
3152
1356
1.45
-
-
-
-
-
-
0.8
3620
1882
2.02
3324
1629
1.75
2972
1380
1.48
-
-
-
-
-
-
-
-
-
1.0
3227
1708
1.83
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
2.
Blower performance includes two-inch throwaway filters.
3.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
4.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
5.
W = Watts
TABLE 29: DF120 (10 TON) OPTIONAL MOTOR DOWN SHOT BLOWER PERFORMANCE1 2
TURNS OPEN4
ESP3
0
1
5
2
5
3
5
4
5
5
5
BHP
CFM
W5
BHP
2.26
3907
1860
1.99
CFM
W
0.4
4965
3485
0.6
4876
3416
3.66
4651
2997
3.21
4359
2582
2.77
4038
2220
2.38
3860
1966
2.11
3590
1724
1.85
0.8
4713
3291
3.53
4387
2823
3.03
4077
2417
2.59
3719
2059
2.21
3541
1827
1.96
3242
1584
1.70
1.0
4476
3116
3.34
4084
2632
2.82
3768
2245
2.41
3365
1892
2.03
3197
1691
1.81
-
-
-
1.2
4165
2898
3.11
3741
2427
2.60
3432
2070
2.22
-
-
-
-
-
-
-
-
-
1.4
3779
2646
2.84
3359
2212
2.37
3069
1895
2.03
-
-
-
-
-
-
-
-
-
1.6
3319
2372
2.54
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
36
BHP
CFM
W
3.74
4875
3150
BHP
CFM
W
3.38
4613
2739
BHP
CFM
W
2.94
4322
2374
BHP
CFM
W
2.55
4156
2106
1.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
2.
Blower performance includes two-inch throwaway filters.
3.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
4.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
5.
W = Watts
Unitary Products Group
127083-YIM-B-0606
TABLE 30: DF078 (6-1/2 TON) STANDARD MOTOR SIDE SHOT BLOWER PERFORMANCE1 2
TURNS OPEN4
ESP3
0
1
2
3
4
CFM
W5
BHP
W5
W5
CFM
W5
W5
0.4
-
-
-
-
-
-
3367
1216
1.30
3133
1067
1.14
2954
944
1.01
2701
819
0.88
0.6
-
-
-
3208
1239
1.33
2913
1068
1.15
2466
913
0.98
2350
789
0.85
1750
621
0.67
0.8
-
-
-
2651
1058
1.13
2317
894
0.96
1656
700
0.75
-
-
-
-
-
-
1.0
2186
998
1.07
1774
830
0.89
-
-
-
-
-
-
-
-
-
-
-
-
CFM
BHP
CFM
BHP
BHP
CFM
5
BHP
CFM
W5
BHP
1.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
2.
Blower performance includes two-inch throwaway filters.
3.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
4.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
5.
W = Watts
TABLE 31: DF078 (6-1/2 TON) OPTIONAL MOTOR SIDE SHOT BLOWER PERFORMANCE1 2
TURNS OPEN4
ESP3
0
1
2
3
4
5
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
0.6
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3597
1598
1.71
0.8
-
-
-
-
-
-
-
-
-
-
-
-
3503
1689
1.81
3172
1430
1.53
1.0
-
-
-
-
-
-
3406
1778
1.91
3032
1497
1.61
2248
1143
1.23
1.2
-
-
-
-
-
-
3327
1866
2.00
2926
1578
1.69
2160
1217
1.31
-
-
-
1.4
-
-
-
3270
1971
2.11
2537
1544
1.66
2043
1296
1.39
-
-
-
-
-
-
1.6
3196
2077
2.23
2460
1651
1.77
1858
1318
1.41
-
-
-
-
-
-
-
-
-
1.8
2426
1768
1.90
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
2.
Blower performance includes two-inch throwaway filters.
3.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
4.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
5.
W = Watts
Unitary Products Group
37
127083-YIM-B-0606
TABLE 32: DF090 (7-1/2 TON) STANDARD MOTOR SIDE SHOT BLOWER PERFORMANCE
(63
&)0
7XUQV
530 :
%+3
&)0
7XUQ
530 :
%+3
&)0
7851623(1
7XUQV
530 :
%+3 &)0
7XUQV
530 :
%+3
&)0
7XUQV
530 :
%+3
7XUQV
&)0 530 :
%+3
%ORZHUSHUIRUPDQFHIRUJDVKHDWLQFOXGHVPD[LPXPQXPEHURIKHDWWXEHVDYDLODEOHIRUHDFKWRQQDJH
%ORZHUSHUIRUPDQFHLQFOXGHVWZRLQFKWKURZDZD\ILOWHUV
(63([WHUQDO6WDWLF3UHVVXUHJLYHQLVWKDWDYDLODEOHIRUWKHVXSSO\DQGUHWXUQDLUGXFWV\VWHP$OOLQWHUQDOUHVLVWDQFHVKDYHEHHQ
GHGXFWHGIURPWKHWRWDOVWDWLFSUHVVXUHRIWKHEORZHU
³7XUQV2SHQ´UHIHUVWRWKHVHWWLQJRIWKHYDULDEOHSLWFKPRWRUVKHDYHZKHUH³7XUQV2SHQ´LVIXOO\FORVHG
: :DWWV
72167$1'$5'027256,'(6+27%/2:(53(5)250$1&(
([WHUQDO6WDWLF:&
7XUQV
7XUQ
7XUQV
7XUQV
7XUQV
7XUQV
&)0
38
Unitary Products Group
127083-YIM-B-0606
TABLE 33: DF090 (7-1/2 TON) OPTIONAL MOTOR SIDE SHOT BLOWER PERFORMANCE
(63
&)0
7XUQV
530 :
%+3
&)0
7XUQ
530 :
%+3
&)0
7851623(1
7XUQV
530 : %+3 &)0
7XUQV
530 :
%+3
&)0
7XUQV
530 :
%+3
7XUQV
&)0 530 : %+3
%ORZHUSHUIRUPDQFHIRUJDVKHDWLQFOXGHVPD[LPXPQXPEHURIKHDWWXEHVDYDLODEOHIRUHDFKWRQQDJH
%ORZHUSHUIRUPDQFHLQFOXGHVWZRLQFKWKURZDZD\ILOWHUV
(63([WHUQDO6WDWLF3UHVVXUHJLYHQLVWKDWDYDLODEOHIRUWKHVXSSO\DQGUHWXUQDLUGXFWV\VWHP$OOLQWHUQDOUHVLVWDQFHVKDYHEHHQ
GHGXFWHGIURPWKHWRWDOVWDWLFSUHVVXUHRIWKHEORZHU
³7XUQV2SHQ´UHIHUVWRWKHVHWWLQJRIWKHYDULDEOHSLWFKPRWRUVKHDYHZKHUH³7XUQV2SHQ´LVIXOO\FORVHG
: :DWWV
721237,21$/027256,'(6+27%/2:(53(5)250$1&(
([WHUQDO 6WDWLF :&
7XUQV
7XUQV
7XUQV 7XUQV 7XUQ
7XUQV
&)0
Unitary Products Group
39
127083-YIM-B-0606
TABLE 34: DF102 (8-1/2 TON) STANDARD MOTOR SIDE SHOT BLOWER PERFORMANCE
7851623(1
(63
&)0
7XUQV
530 :
%+3
&)0
7XUQ
530 :
%+3
&)0
7XUQV
530 :
%+3
7XUQV
530 :
&)0
%+3
&)0
7XUQV
530 :
%+3
7XUQV
&)0 530 : %+3
%ORZHUSHUIRUPDQFHIRUJDVKHDWLQFOXGHVPD[LPXPQXPEHURIKHDWWXEHVDYDLODEOHIRUHDFKWRQQDJH
%ORZHUSHUIRUPDQFHLQFOXGHVWZRLQFKWKURZDZD\ILOWHUV
(63([WHUQDO6WDWLF3UHVVXUHJLYHQLVWKDWDYDLODEOHIRUWKHVXSSO\DQGUHWXUQDLUGXFWV\VWHP$OOLQWHUQDOUHVLVWDQFHVKDYHEHHQ
GHGXFWHGIURPWKHWRWDOVWDWLFSUHVVXUHRIWKHEORZHU
³7XUQV2SHQ´UHIHUVWRWKHVHWWLQJRIWKHYDULDEOHSLWFKPRWRUVKHDYHZKHUH³7XUQV2SHQ´LVIXOO\FORVHG
: :DWWV
72167$1'$5'027256,'(6+27%/2:(53(5)250$1&(
([WHUQDO6WDWLF:&
7XUQV
7XUQV
7XUQV 7XUQV 7XUQ
7XUQV
&)0
40
Unitary Products Group
127083-YIM-B-0606
TABLE 35: DF102 (8-1/2 TON) OPTIONAL DRIVE SIDE SHOT BLOWER PERFORMANCE
(63
&)0
±
±
±
7XUQV
530 :
±
±
±
±
±
±
%+3
±
±
±
&)0
7XUQ
530 :
%+3
&)0
7851623(1
7XUQV
530 : %+3 &)0
±
7XUQV
530 :
±
±
%+3
±
&)0
±
7XUQV
530 :
±
±
%+3
±
&)0
±
±
7XUQV
530 :
±
±
±
±
%+3
±
±
%ORZHUSHUIRUPDQFHIRUJDVKHDWLQFOXGHVPD[LPXPQXPEHURIKHDWWXEHVDYDLODEOHIRUHDFKWRQQDJH
%ORZHUSHUIRUPDQFHLQFOXGHVWZRLQFKWKURZDZD\ILOWHUV
(63([WHUQDO6WDWLF3UHVVXUHJLYHQLVWKDWDYDLODEOHIRUWKHVXSSO\DQGUHWXUQDLUGXFWV\VWHP$OOLQWHUQDOUHVLVWDQFHVKDYHEHHQ
GHGXFWHGIURPWKHWRWDOVWDWLFSUHVVXUHRIWKHEORZHU
³7XUQV2SHQ´UHIHUVWRWKHVHWWLQJRIWKHYDULDEOHSLWFKPRWRUVKHDYHZKHUH³7XUQV2SHQ´LVIXOO\FORVHG
: :DWWV
721237,21$/'5,9(6,'(6+27%/2:(53(5)250$1&(
([WHUQDO6WDWLF:&
7XUQV
7XUQV
7XUQV 7XUQV 7XUQV 7XUQ
&)0
Unitary Products Group
41
127083-YIM-B-0606
TABLE 36: DF120 (10 TON) STANDARD MOTOR SIDE SHOT BLOWER PERFORMANCE1 2
TURNS OPEN4
ESP3
0
1
2
3
4
5
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
0.2
-
-
-
-
-
-
-
-
-
4368
1843
1.98
4132
1624
1.74
3870
1423
1.53
0.4
-
-
-
4515
2192
2.35
4213
1885
2.02
4020
1692
1.81
3791
1491
1.60
3499
1283
1.38
0.6
-
-
-
4192
2027
2.17
3905
1741
1.87
3657
1537
1.65
3383
1345
1.44
3062
1149
1.23
0.8
-
-
-
3838
1858
1.99
3534
1591
1.71
3236
1386
1.49
2934
1202
1.29
-
-
-
1.0
3755
1942
2.08
3489
1695
1.82
3081
1425
1.53
-
-
-
-
-
-
-
-
-
1.2
3337
1757
1.88
2918
1475
1.58
-
-
-
-
-
-
-
-
-
-
-
-
1.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
2.
Blower performance includes two-inch throwaway filters.
3.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
4.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
5.
W = Watts
TABLE 37: DF120 (10 TON) OPTIONAL MOTOR SIDE SHOT BLOWER PERFORMANCE1 2
TURNS OPEN4
ESP3
0
1
2
3
4
5
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
CFM
W5
BHP
0.2
-
-
-
-
-
-
-
-
-
-
-
-
5067
2614
2.80
4809
2290
2.46
0.4
-
-
-
-
-
-
5179
3112
3.34
4884
2703
2.90
4729
2401
2.57
4459
2113
2.27
0.6
-
-
-
-
-
-
4925
2943
3.16
4585
2521
2.70
4429
2244
2.41
4137
1964
2.11
0.8
-
-
-
4974
3220
3.45
4607
2727
2.92
4267
2342
2.51
4099
2080
2.23
3783
1809
1.94
1.0
4975
3453
3.70
4657
2995
3.21
4305
2550
2.73
3941
2171
2.33
3751
1919
2.06
3371
1630
1.75
1.2
4679
3423
3.67
4366
2808
3.01
4022
2373
2.54
3545
1978
2.12
3305
1741
1.87
-
-
-
1.4
4429
3065
3.29
4040
2607
2.80
3669
2673
2.87
2918
1700
1.82
-
-
-
-
-
-
1.6
4107
2845
3.05
3620
2357
2.53
2931
1830
1.96
-
-
-
-
-
-
-
-
-
1.8
3553
2500
2.68
2756
1899
2.04
-
-
-
-
-
-
-
-
-
-
-
-
2.0
2439
1939
2.08
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
42
1.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
2.
Blower performance includes two-inch throwaway filters.
3.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
4.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
5.
W = Watts
Unitary Products Group
127083-YIM-B-0606
NOTES FOR TABLE 22 THROUGH TABLE 37:
•
•
Blower performance includes dry coil and two-inch
filters.
Blower performance for gas heat includes the maximum
number of heat tubes available for each tonnage.
•
ESP (External Static Pressure) given is that available for
the supply and return air duct system. All internal resistances have been deducted from the total static pressure
of the blower.
TABLE 38: INDOOR BLOWER SPECIFICATIONS
MODEL
DF078
DF090
DF102
DF120
MOTOR
HP
RPM
Eff.
MOTOR SHEAVE
SF
Frame
Datum Dia. (in.)
BLOWER SHEAVE
Bore (in.)
Model
Datum Dia. (in.)
Bore (in.)
Model
BELT
1-1/2
1725
80%
1.15
56
3.4 - 4.4
7/8
1VM50
9.5
1
AK99
A58
2
1725
80%
1.15
56
3.4 - 4.4
7/8
1VM50
7.5
1
AK79
A55
2
1725
80%
1.15
56
3.4 - 4.4
7/8
1VM50
6.5
1
AK69
A49
3
1725
80%
1.15
56
3.4 - 4.4
7/8
1VM50
6.0
1
AK64
A49
3
1725
80%
1.15
56
3.4 - 4.4
7/8
1VM50
6.0
1
AK64
A49
3
1725
80%
1.15
56
3.4 - 4.4
7/8
1VM50
5.7
1
AK61
A49
2
1725
80%
1.15
56
3.4 - 4.4
7/8
1VM50
8.5
1
AK89
A56
3
1725
80%
1.15
56
3.4 - 4.4
7/8
1VM50
7.0
1
AK74
A54
TABLE 39: POWER EXHAUST SPECIFICATIONS
POWER EXHAUST
MODEL
VOLT
PHASE
2PE0473225
2PE0473246
2PE0473258
208/230
460
575
1
1
1
1.
MOTOR
HP
0.75
RPM1
1075
1050
ELECTRICAL
QTY
1
LRA
FLA
MCA
FUSE
SIZE
[email protected]
0.1 ESP
24.9
5.0
2.2
1.5
6.3
2.8
1.9
10
5
4
3,800
N/A
Motors are multi-tapped and factory wired for high speed.
Unitary Products Group
43
127083-YIM-B-0606
AIR BALANCE
Start the supply air blower motor. Adjust the resistances in both the supply and the return air duct systems to balance the air
distribution throughout the conditioned space. The job specifications may require that this balancing be done by someone other
than the equipment installer.
CHECKING AIR QUANTITY
METHOD ONE
1.
Remove the dot plugs from the duct panel (for location of
the dot plugs see Figure 10).
2.
Insert eight-inches of 1/4 inch metal tubing into the airflow on both sides of the indoor coil.
NOTE: The tubes must be inserted and held in a position
perpendicular to the air flow so that velocity pressure will not affect the static pressure readings.
3.
Use an Inclined Manometer or Magnehelic to determine
the pressure drop across a dry evaporator coil. Since the
moisture on an evaporator coil can vary greatly, measuring the pressure drop across a wet coil under field conditions could be inaccurate. To assure a dry coil, the
compressors should be de-activated while the test is
being run.
5.
6.
1.
Drill two 5/16 inch holes, one in the return air duct as
close to the inlet of the unit as possible, and another in
the supply air duct as close to the outlet of the unit as
possible.
2.
Using the whole drilled in step 1, insert eight inches of
1/4 inch metal tubing into the airflow of the return and
supply air ducts of the unit.
NOTE: The tubes must be inserted and held in position perpendicular to the airflow so that velocity pressure
will not affect the static pressure readings.
3.
Use an Inclined Manometer or Magnehelic to determine
the pressure drop across the unit. This is the External
Static Pressure (ESP). In order to obtain an accurate
measurement, be certain that the air filters are clean.
4.
Determine the number of turns the variable motor
sheave is open.
5.
Select the correct blower performance table for the unit
from Tables 22 - 37. Tables are presented for horizontal
and downflow configuration.
6.
To adjust Measured CFM to Required CFM, see ’SUPPLY AIR DRIVE ADJUSTMENT’.
Determine the unit Measured CFM from the Blower Performance Table, External Static Pressure and the number of turns the variable motor sheave is open.
7.
To adjust Measured CFM to Required CFM, see ’SUPPLY AIR DRIVE ADJUSTMENT’.
After readings have been obtained, remove the tubes
and replace the dot plugs.
8.
After reading has been obtained, remove the tubes and
seal holes.
NOTE: De-energize the compressors before taking any test
measurements to assure a dry evaporator coil.
4.
METHOD TWO
The CFM through the unit can be determined from the
pressure drop indicated by the manometer by referring to
Figure 26. In order to obtain an accurate measurement,
be certain that the air filters are clean.
NOTE: With the addition of field installed accessories
repeat this procedure.
Failure to properly adjust the total system air quantity can result in extensive blower damage.
Failure to properly adjust the total system air quantity can result in extensive blower damage.
44
Unitary Products Group
127083-YIM-B-0606
35('$ 725 &$ % ,1(7,1'225&2,/ 35(6685('52396$ ,5)/ 2:
')
')
'U\&RL O'HOWD3,:*
$ L U I O R Z &)0
FIGURE 26 - DRY COIL DELTA P 50" CABINET
PREDA TOR 42" CA B INET INDOOR COIL PRESSURE DROP VS A IRFL OW
0.55
0.5
DF090, 102
Dry Coil Delta P (IWG)
0.45
0.4
0.35
0.3
0.25
0.2
2000
2500
3000
3500
4000
4500
A i r f l o w (CFM)
FIGURE 27 - DRY COIL DELTA P 42" CABINET
Unitary Products Group
45
127083-YIM-B-0606
SUPPLY AIR DRIVE ADJUSTMENT
EXAMPLE
A 10 ton unit was selected to deliver 4,000 CFM with a 3 HP
motor, but the unit is delivering 3,750 CFM. The variable pitch
motor sheave is set at 2 turns open.
Before making any blower speed changes review
the installation for any installation errors, leaks or
undesirable systems effects that can result in loss of
airflow.
Even small changes in blower speed can result in
substantial changes in static pressure and BHP.
BHP and AMP draw of the blower motor will
increase by the cube of the blower speed. Static
pressure will increase by the square of the blower
speed. Only qualified personnel should make blower
speed changes, strictly adhering to the fan laws.
At unit start-up, the measured CFM may be higher or lower
than the required CFM. To achieve the required CFM, the
speed of the drive may have adjusted by changing the datum
diameter (DD) of the variable pitch motor sheave as
described below:
Specified CFM • Existing DD = New DD
( Measured
CFM )
Use the following tables and the DD calculated per the above
equation to adjust the motor variable pitch sheave.
Use the equation to determine the required DD for the new
motor sheave,
CFM • 4.0 in. = 4.26 in.
( 4,000
3,750 CFM )
Use Table 42 to locate the DD nearest to 4.26 in. Close the
sheave to 1/2 turn open.
New BHP
= (Speed increase)3 • BHP at 3,750 CFM
= (Speed increase)3 • Original BHP
= New BHP
New motor Amps
= (Speed increase)3 • Amps at 3,750 CFM
= (Speed increase)3 • Original Amps
= New Amps
46
Unitary Products Group
127083-YIM-B-0606
TABLE 40: ADDITIONAL STATIC RESISTANCE DF078, 120
Cooling Only1
Economizer2 3
1900
0.06
2100
0.07
2300
CFM
Electric Heat KW2
9
18
24
36
54
0.02
0.05
0.06
0.07
0.08
0.10
0.02
0.06
0.07
0.08
0.09
0.11
0.08
0.02
0.07
0.08
0.09
0.10
0.13
2500
0.09
0.02
0.08
0.09
0.10
0.11
0.14
2700
0.11
0.03
0.09
0.10
0.12
0.13
0.16
2900
0.12
0.03
0.10
0.11
0.13
0.14
0.18
3100
0.14
0.03
0.12
0.13
0.15
0.16
0.20
3300
0.16
0.03
0.13
0.14
0.17
0.18
0.22
3500
0.18
0.04
0.15
0.16
0.19
0.20
0.24
3700
0.20
0.04
0.17
0.18
0.21
0.22
0.26
3900
0.23
0.04
0.19
0.20
0.23
0.24
0.28
4100
0.25
0.04
0.21
0.22
0.25
0.26
0.31
4300
0.28
0.05
0.23
0.24
0.28
0.29
0.34
4500
0.30
0.05
0.25
0.26
0.30
0.31
0.37
4700
0.33
0.05
0.28
0.29
0.33
0.34
0.40
4900
0.36
0.05
0.30
0.31
0.35
0.37
0.43
5100
0.39
0.06
0.33
0.34
0.38
0.40
0.46
1.
Add these resistance values to the available static resistance in the respective Blower Performance Tables.
2.
Deduct these resistance values from the available external static pressure shown in the respective Blower Performance Table.
3.
The pressure drop through the economizer is greater for 100% outdoor air than for 100% return air. If the resistance of the return
air duct system is less than 0.25 IWG, the unit will deliver less CFM during full economizer operation.
TABLE 41: ADDITIONAL STATIC RESISTANCE DF 090, 102
CFM
Cooling Only1
Economizer2 3
1900
2100
2300
2500
2700
2900
3100
3300
3500
3700
3900
4100
4300
-0.004
0.01
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.09
0.10
0.07
0.09
0.11
0.13
0.16
0.18
0.20
0.22
0.24
0.27
0.29
0.31
0.33
Electric Heat KW2
9
18
24
36
54
0.05
0.06
0.07
0.08
0.09
0.1
0.12
0.13
0.15
0.17
0.19
0.21
0.23
0.06
0.07
0.08
0.09
0.1
0.11
0.13
0.14
0.16
0.18
0.2
0.22
0.24
0.07
0.08
0.09
0.1
0.12
0.13
0.15
0.17
0.19
0.21
0.23
0.25
0.28
0.08
0.09
0.1
0.11
0.13
0.14
0.16
0.18
0.2
0.22
0.24
0.26
0.29
0.1
0.11
0.13
0.14
0.16
0.18
0.2
0.22
0.24
0.26
0.28
0.31
0.34
1.
Deduct these resistance values to the available static resistance in the respective Blower Performance Tables.
2.
Deduct these resistance values from the available external static pressure shown in the respective Blower Performance Table.
3.
The pressure drop through the economizer is greater for 100% outdoor air than for 100% return air. If the resistance of the return
air duct system is less than 0.25 IWG, the unit will deliver less CFM during full economizer operation.
Unitary Products Group
47
127083-YIM-B-0606
TABLE 42: MOTOR SHEAVE DATUM DIAMETERS
1VM50x7/8
(1-1/2, 2 & 3 HP Motor)
Turns Open
Datum Diameter
0
4.4
1/2
4.3
1
4.2
1-1/2
4.1
2
4.0
2-1/2
3.9
3
3.8
3-1/2
3.7
4
3.6
4-1/2
3.5
5
3.4
OPERATION
SEQUENCE OF OPERATIONS OVERVIEW
For the Predator® series of units, the thermostat makes a circuit between "R" and "Y1" for the first stage of cooling.
The call is passed to the Unit Control Board (UCB), which
then determines whether the requested operation is available
and, if so, which components to energize.
For gas heating, the UCB monitors the "W1" call but does not
handle the operation of the gas furnace. An ignition control
board controls the gas heater operation. For electric heat
units, the UCB passes the call to the electric heater. In both
cases, when the "W1" call is sensed, the indoor air blower is
energized following a specified heating delay.
If at any time a call for both heating and cooling are present,
the heating operation will be performed. If operating, the cooling system is halted as with a completion of a call for cooling.
Heating always takes priority.
COOLING SEQUENCE OF OPERATION
CONTINUOUS BLOWER
By setting the room thermostat fan switch to "ON," the supply
air blower will operate continuously.
INTERMITTENT BLOWER
With the room thermostat fan switch set to "AUTO" and the
system switch set to either the "AUTO" or "HEAT" settings,
the blower is energized whenever a cooling or heating operation is requested. The blower is energized after any specified
delay associated with the operation.
48
When energized, the indoor blower has a minimum run time
of 30 seconds. Additionally, the indoor blower has a delay of
10 seconds between operations.
NO OUTDOOR AIR OPTIONS
When the thermostat calls for the first stage of cooling, the
low-voltage control circuit from “R” to “Y1” and “G” is completed. The UCB energizes the economizer (if installed and
free cooling is available) or the first available compressor*
and the condenser fans. For first stage cooling, compressor
#1 is energized. If compressor #1 is unavailable, compressor
#2 is energized. After completing the specified fan on delay
for cooling, the UCB will energize the blower motor.
When the thermostat calls for the second stage of cooling,
the low-voltage control circuit from “R” to “Y2” is completed.
The control board energizes the first available compressor. If
free cooling is being used for the first stage of cooling, compressor #1 is energized. If compressor #1 is active for first
stage cooling or the first compressor is locked-out, compressor #2 is energized. In free-cooling mode, if the call for the
second stage of cooling continues for 20 minutes, compressor #2 is energized, provided it has not been locked-out.
If there is an initial call for both stages of cooling, the UCB will
delay energizing compressor #2 by 30 seconds in order to
avoid a power rush.
Once the thermostat has been satisfied, it will de-energize Y1
and Y2. If the compressors have satisfied their minimum run
times, the compressors and condenser fans are de-energized. Otherwise, the unit operates each cooling system until
the minimum run times for the compressors have been completed. Upon the final compressor de-energizing, the blower
is stopped following the elapse of the fan off delay for cooling.
* To be available, a compressor must not be locked-out due
to a high or low-pressure switch or freezestat trip and the
Anti-Short Cycle Delay (ASCD) must have elapsed.
ECONOMIZER WITH SINGLE ENTHALPY SENSOR When the room thermostat calls for "first-stage" cooling, the
low voltage control circuit from "R" to "G" and "Y1" is completed. The UCB energizes the blower motor (if the fan switch
on the room thermostat is set in the "AUTO" position) and
drives the economizer dampers from fully closed to their minimum position. If the enthalpy of the outdoor air is below the
set point of the enthalpy controller (previously determined),
"Y1" energizes the economizer. The dampers will modulate to
maintain a constant supply air temperature as monitored by
the discharge air sensor. If the outdoor air enthalpy is above
the set point, "Y1" energizes compressor #1.
When the thermostat calls for "second-stage" cooling, the low
voltage control circuit from "R" to "Y2" is completed. The UCB
energizes the first available compressor. If the enthalpy of the
outdoor air is below the set point of the enthalpy controller
Unitary Products Group
127083-YIM-B-0606
(i.e. first stage has energized the economizer), "Y2" will energize compressor #1. If the outdoor air is above the set point,
"Y2" will energize compressor #2.
Once the thermostat has been satisfied, it will de-energize
“Y1” and “Y2”. If the compressors have satisfied their minimum run times, the compressors and condenser fans are deenergized. Otherwise, the unit operates each cooling system
until the minimum run times for the compressors have been
completed. Upon the final compressor de-energizing, the
blower is stopped following the elapse of the fan off delay for
cooling, and the economizer damper goes to the closed position. If the unit is in continues fan operation, the economizer
damper goes to the minimum position.
ECONOMIZER WITH DUAL ENTHALPY SENSORS The operation with the dual enthalpy sensors is identical to
the single sensor except that a second enthalpy sensor is
mounted in the return air. This return air sensor allows the
economizer to choose between outdoor air and return air,
whichever has the lowest enthalpy value, to provide maximum operating efficiency.
ECONOMIZER WITH POWER EXHAUST A unit equipped with an economizer (single or dual enthalpy)
and a power exhaust operates as specified above with one
addition. The power exhaust motor is energized 45 seconds
after the actuator position exceeds the exhaust fan set point
on the economizer control. When the power exhaust is operating, the second stage of mechanical cooling will not operate. As always, the "R" to "G" connection provides minimum
position but does not provide power exhaust operation.
MOTORIZED OUTDOOR AIR DAMPERS This system operation is the same as the units with no outdoor air options with one exception. When the "R" to "G" circuit is complete, the motorized damper drives open to a
position set by the thumbwheel on the damper motor. When
the "R" to "G" circuit is opened, the damper spring returns
fully closed.
COOLING OPERATION ERRORS
Each cooling system is monitored for operation outside of the
intended parameters. Errors are handled as described below.
All system errors override minimum run times for compressors.
HIGH-PRESSURE LIMIT SWITCH
During cooling operation, if a high-pressure limit switch
opens, the UCB will de-energize the associated compressor,
initiate the ASCD (Anti-short cycle delay), and, if the other
compressor is idle, stop the condenser fans. If the call for
cooling is still present at the conclusion of the ASCD, the
UCB will re-energize the halted compressor.
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Should a high-pressure switch open three times within two
hours of operation, the UCB will lock-out the associated compressor and flash a code (see Table 54). If the other compressor is inactive, the condenser fans will be de-energized.
LOW-PRESSURE LIMIT SWITCH
The low-pressure limit switch is not monitored during the initial 30 seconds of a cooling system's operation. For the following 30 seconds, the UCB will monitor the low-pressure
switch to ensure it closes. If the low-pressure switch fails to
close after the 30-second monitoring phase, the UCB will deenergize the associated compressor, initiate the ASCD, and,
if the other compressor is idle, stop the condenser fans.
Once the low-pressure switch has been proven (closed during the 30-second monitor period described above), the UCB
will monitor the low-pressure limit switch for any openings. If
the low-pressure switch opens for greater than 5 seconds,
the UCB will de-energize the associated compressor, initiate
the ASCD, and, if the other compressor is idle, stop the condenser fans.
If the call for cooling is still present at the conclusion of the
ASCD, the UCB will re-energize the halted compressor.
Should a low-pressure switch open three times within one
hour of operation, the UCB will lock-out the associated compressor and flash a code (Table 54). If the other compressor
is inactive, the condenser fans will be de-energized.
FREEZESTAT
During cooling operation, if a freezestat opens, the UCB will
de-energize the associated compressor, initiate the ASCD,
and, if the other compressor is idle, stop the condenser fans.
If the call for cooling is still present at the conclusion of the
ASCD, the UCB will re-energize the halted compressor.
Should a freezestat open three times within two hours of
operation, the UCB will lock-out the associated compressor
and flash a code (Table 54). If the other compressor is inactive, the condenser fans will be de-energized.
LOW AMBIENT COOLING
To determine when to operate in low ambient mode, the UCB
has a pair of terminals connected to a temperature-activated
switch set at 45ºF. When the low ambient switch is closed
and the thermostat is calling for cooling, the UCB will operate
in the low ambient mode.
Low ambient mode operates the compressors in this manner:
10 minutes on, 5 minutes off. The indoor blower is operated
throughout the cycle. The 5-minute off period is necessary to
defrost the indoor coil.
Low ambient mode always begins with compressor operation. Compressor minimum run time may extend the minutes
49
127083-YIM-B-0606
of compressor operation. The defrost cycle will begin immediately following the elapse of the minimum run time.
When operating in low ambient mode, the UCB will not lockout the compressors due to a freezestat trip. However, a
freezestat trip will de-energize the associated compressor. If
the call for cooling is still present at the end of the ASCD and
the freezestat has closed, the unit will resume operation.
SAFETY CONTROLS
The unit control board monitors the following inputs for each
cooling system:
1.
A suction line freezestat to protect against low evaporator temperatures due to a low airflow or a low return air
temperature, (opens at 26 ± 5 °F and resets at 38 ± 5°F).
2.
A high-pressure switch to protect against excessive discharge pressures due to a blocked condenser coil or a
condenser motor failure, (opens at 405 ± 10 psig or 440
± 10 psig depending on unit model).
3.
A low-pressure switch to protect against loss of refrigerant charge, (opens at 22 ± 5 psig or 45 ± 5 psig).
The above pressure switches are hard-soldered to the unit.
The refrigeration systems are independently monitored and
controlled. On any fault, only the associated system will be
affected by any safety/preventive action. The other refrigerant
system will continue in operation unless it is affected by the
fault as well.
The unit control board monitors the temperature limit switch
of electric heat units and the temperature limit switch and the
gas valve of gas furnace units.
The ignition control board monitors the temperature limit
switch, the rollout switch, the draft motor proving switch, the
flame sensor, and the gas valve.
FLASH CODES
The UCB will initiate a flash code associated with errors
within the system. Refer to UNIT CONTROL BOARD FLASH
CODES Table 54.
RESET
Remove the call for cooling, by raising thermostat setting
higher than the conditioned space temperature. This resets
any pressure or freezestat flash codes.
ELECTRIC HEATING SEQUENCE OF OPERATIONS
The following sequence describes the operation of the electric heat section.
Two-stage heating:
a.
Upon a call for first stage heat by the thermostat, the
heater relay (RA) will be energized. After completing
the specified fan on delay for heating, the UCB will
energize the blower motor. If the second stage of
heat is required, heater relay (RB) will be energized.
After completing the specified fan on delay for heating, the UCB will energize the blower motor.
b.
The thermostat will cycle the electric heat to satisfy
the heating requirements of the conditioned space.
ELECTRIC HEAT OPERATION ERRORS
TEMPERATURE LIMIT
If the UCB senses zero volts from the high temperature limit,
the indoor blower motor is immediately energized.
This limit is monitored regardless of unit operation status, i.e.
the limit is monitored at all times.
If the temperature limit opens three times within one hour, it
will lock-on the indoor blower motor and a flash code is initiated (See Table 54).
COMPRESSOR PROTECTION
SAFETY CONTROLS
In addition to the external pressure switches, the compressors also have inherent (internal) protection. If there is an
abnormal temperature rise in a compressor, the protector will
open to shut down the compressor. The UCB incorporates
features to minimize compressor wear and damage. An AntiShort Cycle Delay (ASCD) is utilized to prevent operation of
a compressor too soon after its previous run. Additionally, a
minimum run time is imposed any time a compressor is energized.
The ASCD is initiated on unit start-up and on any compressor
reset or lock-out.
50
The UCB monitors the temperature limit switch of electric
heat units.
The control circuit includes the following safety controls:
LIMIT SWITCH (LS)
This control is located inside the heater compartment and is
set to open at the temperature indicated in the Electric Heat
Limit Setting Table 43 and 44. It resets automatically. The
limit switch operates when a high temperature condition,
caused by inadequate supply air flow occurs, thus shutting
down the heater and energizing the blower.
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127083-YIM-B-0606
TABLE 43: ELECTRIC HEAT LIMIT SETTING 50 3/4”
CABINET
UNIT (TONS)
DF 078 (6.5)
DF 078, 120
(6.5, 10)
DF 078, 120
(6.5, 10)
DF 078, 120
(6.5, 10)
DF 120 (10)
DF 078 (6.5)
DF 078, 120
(6.5, 10)
DF 078, 120
(6.5, 10)
DF 078, 120
(6.5, 10)
DF 120 (10)
DF 078 (6.5)
DF 078, 120
(6.5, 10)
DF 078, 120
(6.5, 10)
DF 078, 120
(6.5, 10)
DF 120 (10)
VOLTAGE
208/230
480
600
9
LIMIT
SWITCH
OPENS
°F
150
18
150
24
150
34
150
54
9
130
150
18
150
24
150
34
150
54
9
130
150
18
150
24
150
34
150
54
130
HEATER
kW
TABLE 44: ELECTRIC HEAT LIMIT SETTING 42”
CABINET
UNIT (TONS)
HEATER
VOLTAGE
kW
DF 090, 102
(7.5, 8.5)
208/230
DF 090, 102
(7.5, 8.5)
480
DF 090, 102
(7.5, 8.5)
600
9
18
24
34
9
18
24
34
9
18
24
34
LIMIT
SWITCH
OPENS
°F
135
150
165
190
135
150
165
185
135
150
150
185
FLASH CODES
The UCB will initiate a flash code associated with errors
within the system. Refer to UNIT CONTROL BOARD FLASH
CODES Table 54.
RESET
Remove the call for heating by lowering the thermostat setting lower than the conditioned space temperature. This
resets any flash codes.
ELECTRIC HEAT ANTICIPATOR SETPOINTS
It is important that the anticipator setpoint be correct. Too
high of a setting will result in longer heat cycles and a greater
temperature swing in the conditioned space. Reducing the
value below the correct setpoint will give shorter “ON” cycles
and may result in the lowering of the temperature within the
conditioned space. Refer to Table 45 for the required electric
heat anticipator setting.
TABLE 45: ELECTRIC HEAT ANTICIPATOR
SETPOINTS
SETTING, AMPS
W1
W2
0.13
0.1
GAS HEATING SEQUENCE OF OPERATIONS
When the thermostat calls for the first stage of heating, the
low-voltage control circuit from “R” to “W1” is completed. A
call for heat passes through the UCB to the Ignition Control
Board (ICB). The UCB monitors the “W1” call and acts upon
any call for heat by monitoring the Gas Valve (GV). Once
voltage has been sensed at the GV, the UCB will initiate the
fan on delay for heating, energizing the indoor blower the
specified delay has elapsed.
When the thermostat has been satisfied, heating calls are
ceased. The GV is immediately closed. The blower is deenergized after the fan off delay for heating has elapsed. The
draft motor performs a 30-second post purge.
IGNITION CONTROL BOARD
FIRST STAGE OF HEATING
When the ICB receives a call for first stage of heating, “W1,”
the draft motor is energized. Once the draft motor has been
proven, a 30-second purge is initiated. At the end of the
purge, the GV is opened, and the spark ignitor is energized
for 10 seconds. The ICB then checks for the presence of
flame. If flame is detected, the ICB enters a flame stabilization period. If flame was not detected, the GV closes, and a
retry operation begins.
During the flame stabilization period, a loss of the flame for 2
seconds will cause the GV to close and the retry operation to
begin. After the flame stabilization period, a loss of flame for
3/4 second will cause the GV to close and the retry operation
to begin.
At the conclusion of the flame stabilization period, the ICB will
operate the gas heat in high fire for an additional 60 seconds
(for a total for 120 seconds of high fire operation). After this
60 seconds, the ICB will then use the call for the second
stage of heat to control second stage operation of the GV.
When “W1” is satisfied, both valves are closed.
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51
127083-YIM-B-0606
SECOND STAGE OF HEATING
When the ICB receives a call for the second stage of heating,
“W2,” the ICB conducts a complete first stage ignition
sequence. If this sequence is satisfied, the second main
valve of the GV is opened.
When “W2” is satisfied, the second main valve is closed.
RETRY OPERATION
If “W1” is present, a flame is sensed, but the GV is not energized, the draft motor is energized until the flame detection is
lost. Normal operation is now allowed.
The flame detection circuitry continually tests itself. If the ICB
finds the flame detection circuitry to be faulty, the ICB will not
permit an ignition sequence and the draft motor is energized.
If this failure should occur during an ignition cycle the failure
is counted as a recycle.
When a flame is lost or is not detected during an attempt to
achieve ignition, a retry operation occurs. A 30-second purge
is performed between ignition attempts.
GAS VALVE
If the unit fails after three ignition attempts, the furnace is
locked-out for one hour. The furnace is monitored during this
one-hour period for unsafe conditions.
If the ICB senses voltage at the GV when not requested, the
ICB will energize the draft motor. The ICB will not operate the
furnace until voltage is no longer sensed at the GV. The draft
motor is stopped when voltage is not sensed at the GV.
RECYCLE OPERATION
When a flame is lost after the flame stabilization period, a
recycle operation occurs. If the unit fails after five recycle
attempts, the furnace is locked-out for one hour.
GAS HEATING OPERATION ERRORS
The UCB and ICB continuously monitor the GV.
Any time the UCB senses voltage at the GV without a call for
heat for a continuous five-minute period, the UCB will lock-on
the indoor blower and a flash code is initiated (Table 54).
When voltage is no longer sensed at the GV, the UCB will deenergize the indoor blower following the elapse of the fan off
delay for heating.
LOCK-OUT
A one-hour lockout occurs following three retries or five recycles. During the one-hour lockout, flame detection, limit conditions, and main valves are tested. Any improper results will
cause the appropriate action to occur. Recycling the low voltage power cancels the lock-out.
TEMPERATURE LIMIT
If the UCB senses zero volts from the high temperature limit,
the indoor blower motor is immediately energized. When the
UCB again senses 24 volts from the temperature limit, the
draft motor will perform a 15-second post-purge and the
indoor blower will be de-energized following the elapse of the
fan off delay for heating.
This limit is monitored regardless of unit operation status, i.e.
this limit is monitored at all times.
If the temperature limit opens three times within one hour, it
will lock-on the indoor blower motor and flash code is initiated
(See Table 54).
FLAME SENSE
Flame sensing occurs at all times. If “W1” is not present and
a flame is sensed for 2 seconds, the draft motor is energized
and the GV is kept off. The ICB halts any operation until a
flame is not detected. Once the flame detection is lost, the
ICB performs a post-purge. Normal operation is allowed concurrently with the purge (i.e. this purge can be considered the
purge associated with a call for “W1”).
52
If voltage has been sensed at the GV for at least 15 seconds
during the fan on delay for heating and GV voltage or “W1” is
lost, the indoor blower is forced on for the length of the fan off
delay for heating.
During a call for heat, if the UCB does not sense voltage at
the GV for a continuous five-minute period the UCB will initiate a flash code (Table 54). The indoor blower motor will not
be locked-on while there is no GV voltage.
SAFETY CONTROLS
The UCB monitors the temperature limit switch of gas heat
units.
The control circuit includes the following safety controls:
LIMIT SWITCH (LS)
This control is located inside the gas heat compartment and
is set to open at the temperature indicated in the Gas Heat
Limit Control Settings Table 46. It resets automatically. The
limit switch operates when a high temperature condition,
caused by inadequate supply air flow occurs, thus shutting
down the heater and energizing the blower.
AUXILIARY LIMIT SWITCH (ALS)
This control is located inside the supply air compartment and
is set to open at the temperature indicated in the Gas Heat
Limit Control Settings Table 46. It resets manually. The limit
switch operates when a high temperature condition, caused
Unitary Products Group
127083-YIM-B-0606
by inadequate supply air flow occurs, thus shutting down the
heater and energizing the blower.
The auxiliary limit switch is wired in series with the limit
switch. As such, the UCB cannot distinguish the auxiliary limit
and the gas heat limit switch operation except the auxiliary is
manual reset. Consequently, the control will respond in the
same manner as outlined above under “Limit Switch”.
TABLE 46: GAS HEAT LIMIT CONTROL SETTINGS1
Unit
Size
DF078
DF090
DF102
DF120
1.
Opt.
10
15
10
15
10
15
15
20
Main Limit Setting
°F
215
195
165
165
165
165
195
160
RESETS
Remove the call for heating by lowering the thermostat setting lower than the conditioned space temperature. This
resets any flash codes.
GAS HEAT ANTICIPATOR SETPOINTS
It is important that the anticipator setpoint be correct. Too
high of a setting will result in longer heat cycles and a greater
temperature swing in the conditioned space. Reducing the
value below the correct setpoint will give shorter “ON cycles
and may result in the lowering of the temperature within the
conditioned space. Refer to Table 47 for the required gas
heat anticipator setting.
TABLE 47: GAS HEAT ANTICIPATOR SETPOINTS
SETTING, AMPS
W1
W2
0.65
0.1
Rollout = 300°F, Auxiliary Limit = 200°F
The ICB monitors the Pressure and Rollout switches of gas
heat units.
H E A T E X C H A N G E R T U B E
The control circuit includes the following safety controls:
G A S
S U P P L Y
B U R N E R
P IP E
B U R N E R B R A C K E T
PRESSURE SWITCH (PS)
Once the draft motor has reached full speed and closes the
pressure switch during a normal ignition sequence, if the
pressure sw opens for 2 seconds, the GV will be de-energized, the ignition cycle is aborted, and the ICB flashes the
appropriate code. See Table 55 Ignition Control Flash Codes.
The draft motor is energized until the pressure switch closes
or “W1” is lost.
B U R N E R F L A M E
(B L U E O N L Y )
IG N IT O R
FIGURE 28 - TYPICAL FLAME
START-UP (COOLING)
PRESTART CHECK LIST
After installation has been completed:
ROLLOUT SWITCH (ROS)
The rollout switch is wired in series with the pressure switch.
As such, the ICB cannot distinguish the rollout switch operation from that of the pressure switch.
1.
Check the electrical supply voltage being supplied. Be
sure that it is the same as listed on the unit nameplate.
2.
Set the room thermostat to the off position.
Consequently, the control will only respond in the same manner as outlined above under “Pressure Switch”. An open rollout will inhibit the gas valve from actuating.
3.
Turn unit electrical power on.
4.
Set the room thermostat fan switch to on.
5.
Check indoor blower rotation.
INTERNAL MICROPROCESSOR FAILURE
If the ICB detects an internal failure, it will cease all outputs,
ignore inputs, and display the proper flash code for control
replacement. The ICB remains in this condition until replaced.
FLASH CODES
The UCB will initiate a flash code associated with errors
within the system. Refer to UNIT CONTROL BOARD FLASH
CODES Table 54.
Unitary Products Group
•
If blower rotation is in the wrong direction. Refer to
Phasing Section in general information section.
•
Check blower drive belt tension.
6.
Check the unit supply air (CFM).
7.
Measure evaporator fan motor's amp draw.
8.
Set the room thermostat fan switch to off.
9.
Turn unit electrical power off.
53
127083-YIM-B-0606
OPERATING INSTRUCTIONS
POST START CHECKLIST
1.
After the entire control circuit has been energized and the
heating section is operating, make the following checks:
Turn unit electrical power on.
NOTE: Prior to each cooling season, the crankcase heaters
must be energized at least 10 hours before the system is put into operation.
1.
Check for gas leaks in the unit piping as well as the supply piping.
2.
Set the room thermostat setting to lower than the room
temperature.
3.
First stage compressors will energize after the built-in
time delay (five minutes).
FIRE OR EXPLOSION HAZARD
4.
The second stage of the thermostat will energize second
stage compressor if needed.
Failure to follow the safety warning exactly could
result in serious injury, death or property damage.
Never test for gas leaks with an open flame. use a
commercially available soap solution made specifically for the detection of leaks to check all connections. A fire or explosion may result causing property
damage, personal injury or loss of life.
POST START CHECK LIST
1.
Verify proper system pressures for both circuits.
2.
Measure the temperature drop across the evaporator
coil.
START-UP (GAS HEAT)
2.
Check for correct manifold gas pressures. (See ’CHECKING GAS INPUT’.)
3.
Check the supply gas pressure. It must be within the limits shown on the rating nameplate. Supply pressure
should be checked with all gas appliances in the building
at full fire. At no time should the standby gas pressure
exceed 10.5 in. or the operating pressure drop below 4.5
in for natural gas units. If gas pressure is outside these
limits, contact the local gas utility or propane supplier for
corrective action.
PRE-START CHECK LIST
Complete the following checks before starting the unit.
1.
Check the type of gas being supplied. Be sure that it is
the same as listed on the unit nameplate.
2.
Make sure that the vent outlet and combustion air inlet
are free of any debris or obstruction.
OPERATING INSTRUCTIONS
This furnace is equipped with an automatic re-ignition
system. DO NOT attempt to manually light the pilot.
LIGHTING THE MAIN BURNERS
1.
Turn “OFF” electric power to unit.
2.
Turn room thermostat to lowest setting.
3.
Turn gas valve counter-clockwise to “ON” position (see
Figure 29).
4.
Turn “ON” electric power to unit.
5.
If thermostat set temperature is above room temperature, the main burners will ignite. If a second stage of
heat is called for, the main burners for second stage heat
will ignite for the second stage heat.
SHUT DOWN
1.
Set the thermostat to the lowest temperature setting.
2.
Turn “OFF” all electric power to unit.
3.
Open gas heat access panel.
4.
Turn gas valve clockwise to “OFF” position (See Figure
29).
MANIFOLD GAS PRESSURE ADJUSTMENT
This gas furnace has two heat stages. Therefore, the gas
valve has two adjustment screws located under a plastic protective cover. The second stage (100% input) adjustment
screw is adjacent to the “HI” marking on the valve and the
first stage (60% input) adjustment screw is located adjacent
to the “LO” marking on the valve (See Figure 29).
Manifold pressure adjustment procedure.
Adjust second stage (100% input) pressure first, then adjust
first stage (60% input) pressure.
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Unitary Products Group
127083-YIM-B-0606
1.
Turn off all power to the unit.
2.
Using the outlet pressure port on the gas valve, connect
a manometer to monitor the manifold pressure.
3.
Remove plastic cap covering HI and LO pressure adjustment screws.
4.
Turn on power to the unit.
5.
Set thermostat to call for second stage heat and start furnace.
6.
If necessary, using a screwdriver, turn the second stage
adjustment screw (adjacent to the “HI” marking on the
valve) clockwise to increase manifold pressure or counterclockwise to decrease manifold pressure. Be sure
not to over-fire the unit on second stage.
7.
After the high manifold pressure has been checked,
adjust the thermostat to call for first stage heat.
8.
If necessary, using a screwdriver, turn the first stage
adjustment screw (adjacent to the “LO” marking on the
valve) clockwise to increase manifold pressure or
counterclockwise to decrease manifold pressure. Be
sure not to under-fire the unit on first stage.
9.
Once pressure has been checked, replace the plastic
cap covering the HI and LO pressure adjustment screws.
NOTE: When using natural gas, the manifold pressure for
second stage (100% input) should be 3.5 IWG ±
0.3. The manifold pressure for first stage (60%
input) when using natural gas should be 1.5 IWG ±
0.3.
TABLE 48: GAS HEAT STAGES
# of Burner Tubes
2nd Stage
Input (100%
Btuh)
1st Stage
Input (60%
Btuh)
4
120,000
72,000
6
180,000
108,000
8
240,000
144,000
CHECKING GAS INPUT
NATURAL GAS
This unit has two stages of gas heat. The first stage is 60% of
the full fire input and is considered the minimum input for the
Unitary Products Group
furnace. The intended input for each furnace is shown in the
table below. The following Table applies to units operating on
60 Hz power only.
To determine the rate of gas flow (Second Stage).
1.
Turn off all other gas appliances connected to the gas
meter.
2.
Turn on the furnace and make sure the thermostat is
calling for Second stage (100% input) heat.
3.
Measure the time needed for one revolution of the hand
on the smallest dial on the meter. A typical gas meter
has a 1/2 or a 1 cubic foot test dial.
4.
Using the number of seconds it takes for one revolution
of the dial, calculate the cubic feet of gas consumed per
hour. (See example below).
5.
If necessary, adjust the high pressure regulator as discussed in the section “Manifold Gas Pressure Adjustment”. Be sure not to over-fire the furnace on Second
stage. If in doubt, it is better to leave the Second stage of
the furnace slightly under-fired. Repeat Steps 1-5.
To determine the rate of gas flow (First Stage)
1.
Turn off all other gas appliances connected to the gas
meter.
2.
Turn on the furnace and make sure the thermostat is
calling for first stage (60% input) heat.
3.
Even when the thermostat is calling for first stage heat,
the unit will light on second stage and will run on Second
stage for 1 minute. Allow this one-minute time period to
expire and be certain the unit is running on first stage.
4.
Measure the time needed for one revolution of the hand
on the smallest dial on the meter. A typical gas meter
has a 1/2 or a 1 cubic foot test dial.
5.
Using the number of seconds it takes for one revolution
of the dial, calculate the cubic feet of gas consumed per
hour (See example below).
6.
If necessary, adjust the low pressure regulator as discussed in the section “Manifold Gas Pressure Adjustment”. Be sure not to under-fire the furnace on first
stage. If in doubt, it is better to leave the first stage of the
furnace slightly over-fired (greater than 60% input).
Repeat Steps 1-6.
55
127083-YIM-B-0606
TABLE 49: GAS RATE CUBIC FEET PER HOUR
Seconds
for One
Rev.
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
Size of Test Dial
1/2 cu. ft.
1 cu. ft.
180
150
129
113
100
90
82
75
69
64
60
56
53
50
47
45
43
41
39
37
36
35
34
32
31
30
360
300
257
225
200
180
164
150
138
129
120
113
106
100
95
90
86
82
78
75
72
69
67
64
62
60
NOTE: To find the Btu input, multiply the number of cubic
feet of gas consumed per hour by the Btu content of
the gas in your particular locality (contact your gas
company for this information as it varies widely from
area to area).
After about 20 minutes of operation, determine the furnace
temperature rise. Take readings of both the return air and the
heated air in the ducts (about 6 feet from the furnace) where
they will not be affected by radiant heat. Increase the blower
CFM to decrease the temperature rise; decrease the blower
CFM to increase the rise (See ’SUPPLY AIR DRIVE
ADJUSTMENT’).
NOTE: Each gas heat exchanger size has a minimum
allowable CFM. Below this CFM, the limit will open.
BURNERS/ORIFICES INSPECTION/SERVICING
Before checking or changing burners, pilot or orifices,
CLOSE MAIN MANUAL SHUT-OFF VALVE AND SHUT OFF
ALL POWER TO THE UNIT.
1.
Open the union fitting just upstream of the unit gas valve
and downstream from the main manual shut-off valve in
the gas supply line.
2.
Remove the screws holding each end of the manifold to
the manifold supports.
3.
Disconnect wiring to the gas valves and spark igniter(s).
Remove the manifold & gas valve assembly. Orifices can
now be inspected and/or replaced.
To service burners, complete step 4.
4.
Remove the heat shield on top of the manifold supports.
Burners are now accessible for inspection and/or
replacement.
NOTE: Reverse the above procedure to replace the assemblies.
Make sure that burners are level and seat at the rear of the
gas orifice.
EXAMPLE:
By actual measurement, it takes 19 seconds for the hand on
a 1 cubic foot dial to make a revolution with a 192,000 Btuh
furnace running. To determine rotations per minute, divide 60
by 19 = 3.16. To calculate rotations per hour, multiply 3.16 •
60 = 189.6. Multiply 189.6 • 1 (0.5 if using a 1/2 cubic foot
dial) = 189.6. Multiply 189.6 • (the Btu rating of the gas). For
this example, assume the gas has a Btu rating of 1050
Btu/ft.3. The result of 199,000 Btuh is within 5% of the
192,000 Btuh rating of the furnace.
ADJUSTMENT OF TEMPERATURE RISE
The temperature rise (the difference of temperature between
the return air and the heated air from the furnace) must lie
within the range shown on the CSA rating plate and the data
in Table 19.
H IG H & L O W
H I
G A S A D J U S T M E N T
L O
O N
IN L E T
P R E S S U R E
T A P
O F F
O U T L E T
P R E S S U R E
T A P
M A T E -N -L O C K
C O N N E C T O R S
M V
C
H I
After the temperature rise has been determined, the CFM can
be calculated as follows:
0.8
CFM = Btu Input • ----------------------------( 1.08 ⋅ Δ°F )
FIGURE 29 : TYPICAL GAS VALVE
56
Unitary Products Group
127083-YIM-B-0606
CHARGING THE UNIT
When charging each system, superheat data should be taken
at the compressor inlet.
These units should be charged using the superheat method.
Super heat charging data is shown in Tables 50 thru 53.
TABLE 50: DF078 (6.5 TON) SUPERHEAT CHARGING
Superheat at Compressor Suction (°F)
Airflow = 2500 CFM
Outdoor
Temp (°F)
Indoor WB Temp (°F)
55
57
59
61
63
65
67
69
71
73
75
65
25.6
26.3
27.0
27.7
28.5
29.2
29.9
30.2
30.5
30.7
31.0
70
21.9
22.9
23.8
24.8
25.8
26.7
27.7
28.2
28.8
29.4
29.9
75
18.3
19.5
20.7
21.9
23.1
24.3
25.5
26.3
27.1
28.0
28.8
80
14.6
16.0
17.5
18.9
20.3
21.8
23.2
24.3
25.5
26.6
27.7
10.9
10.9
12.6
14.3
16.0
17.6
19.3
21.0
22.4
23.8
25.2
26.6
8.8
6.6
8.8
11.1
13.3
15.5
17.8
20.0
21.0
22.0
23.0
23.9
95
-
5.1
7.8
10.7
13.5
16.3
19.1
19.6
20.2
20.7
21.3
100
-
-
6.2
8.6
11.0
13.5
15.9
17.0
18.1
19.2
20.3
105
-
-
-
6.6
8.6
10.7
12.7
14.4
16.0
17.7
19.3
110
-
-
-
-
6.2
7.9
9.5
11.7
13.9
16.2
18.4
115
-
-
-
-
-
5.1
6.4
9.1
11.9
14.6
17.4
TABLE 51: DF090 (7.5 TON) SUPERHEAT CHARGING
Superheat at Compressor Suction (°F)
Airflow = 3000 CFM
Outdoor
Temp (°F)
Indoor WB Temp (°F)
55
57
59
61
63
65
67
69
71
73
75
65
15.2
15.7
16.2
16.6
17.1
17.5
18.0
20.1
22.2
24.4
26.5
70
12.5
13.3
14.0
14.8
15.6
16.4
17.1
19.2
21.3
23.5
25.6
75
9.7
10.8
11.9
13.0
14.1
15.2
16.3
18.4
20.5
22.6
24.7
80
6.9
8.3
9.8
11.2
12.6
14.0
15.4
17.5
19.6
21.6
23.7
85
-
5.9
7.6
9.3
11.1
12.8
14.5
16.6
18.7
20.7
22.8
90
-
-
5.6
7.8
10.0
12.2
14.4
16.2
17.9
19.7
21.4
95
-
-
-
6.3
9.0
11.6
14.3
15.7
17.2
18.6
20.1
100
-
-
-
5.7
8.1
10.5
13.0
13.9
14.9
15.8
16.8
105
-
-
-
5.1
7.3
9.4
11.6
12.1
12.6
13.0
13.5
110
-
-
-
-
6.4
8.3
10.3
10.3
10.3
10.3
10.3
115
-
-
-
-
5.5
7.2
8.9
8.4
7.9
7.5
7.0
Unitary Products Group
57
127083-YIM-B-0606
TABLE 52: DF102 (8.5 TON) SUPERHEAT CHARGING
Superheat at Compressor Suction (°F)
Airflow = 3400 CFM
Outdoor
Temp (°F)
Indoor WB Temp (°F)
55
57
59
61
63
65
67
69
71
73
75
65
28.3
30.2
32.1
34.0
36.0
37.9
39.8
40.5
41.2
42.0
42.7
70
24.3
26.2
28.1
29.9
31.8
33.7
35.6
36.6
37.6
38.7
39.7
75
20.3
22.2
24.0
25.9
27.7
29.6
31.4
32.7
34.0
35.4
36.7
80
16.3
18.1
19.9
21.8
23.6
25.4
27.2
28.8
30.4
32.1
33.7
85
12.3
14.1
15.9
17.7
19.4
21.2
23.0
24.9
26.8
28.8
30.7
90
-
7.1
9.3
11.6
13.8
16.1
18.4
20.9
23.5
26.1
28.7
95
-
-
-
5.5
8.2
11.0
13.7
16.9
20.2
23.4
26.7
100
-
-
-
-
6.2
8.2
10.3
12.7
15.1
17.6
20.0
105
-
-
-
-
-
5.5
6.8
8.5
10.1
11.7
13.3
110
-
-
-
-
-
-
-
-
5.0
5.9
6.7
115
-
-
-
-
-
-
-
-
-
-
-
TABLE 53: DF120 (10 TON) SUPERHEAT CHARGING
Superheat at Compressor Suction (°F)
Airflow = 4000 CFM
Outdoor
Temp (°F)
58
Indoor WB Temp (°F)
55
57
59
61
63
65
67
69
71
73
75
65
42.0
42.3
42.6
42.9
43.1
43.4
43.7
43.8
43.9
44.1
44.2
70
39.2
39.5
39.8
40.1
40.4
40.7
41.0
41.3
41.5
41.8
42.0
75
36.4
36.7
37.0
37.3
37.6
38.0
38.3
38.7
39.1
39.5
39.9
80
33.5
33.9
34.2
34.5
34.9
35.2
35.6
36.1
36.7
37.2
37.8
85
30.7
31.1
31.4
31.8
32.1
32.5
32.9
33.6
34.3
35.0
35.7
90
28.1
28.5
28.9
29.3
29.7
30.1
30.5
31.2
32.0
32.8
33.6
95
25.5
26.0
26.4
26.8
27.2
27.6
28.1
28.9
29.8
30.7
31.6
100
19.8
20.4
20.9
21.4
22.0
22.5
23.1
24.9
26.7
28.6
30.4
105
14.1
14.8
15.4
16.1
16.8
17.4
18.1
20.9
23.7
26.5
29.3
110
8.4
9.2
10.0
10.7
11.5
12.3
13.1
16.8
20.6
24.4
28.1
115
-
-
-
5.4
6.3
7.2
8.1
12.8
17.5
22.3
27.0
Unitary Products Group
127083-YIM-B-0606
PREDATOR® FLASH CODES
TROUBLESHOOTING
Troubleshooting of components may require opening the electrical control box with the power connected to the unit. Use extreme care when
working with live circuits! Check the unit nameplate for the correct line voltage and set the voltmeter to the correct range before making any
connections with line terminals.
When not necessary, shut off all electric power to the
unit prior to any of the following maintenance procedures so as to prevent personal injury.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous operation which could cause injury to person
and/or damage unit components. Verify proper operation after servicing.
Various flash codes are utilized by the unit control board
(UCB) to aid in troubleshooting. Flash codes are
distinguished by the short on and off cycle used
(approximately 200ms on and 200ms off). To show normal
operation, the control board flashes a 1 second on, 1 second
off "heartbeat" during normal operation. This is to verify that
the UCB is functioning correctly. Do not confuse this with an
error flash code. To prevent confusion, a 1-flash, flash code
is not used.
Alarm condition codes are flashed on the UCB lower left Red
LED, See Figure 30. While the alarm code is being flashed, it
will also be shown by the other LEDs: lit continuously while
the alarm is being flashed. The total of the continuously lit
LEDs equates to the number of flashes, and is shown in the
table. Pressing and releasing the LAST ERROR button on
the UCB can check the alarm history. The UCB will cycle
through the last five (5) alarms, most recent to oldest,
separating each alarm flash code by approximately 2
seconds. In all cases, a flashing Green LED will be used to
indicate non-alarm condition.
In some cases, it may be necessary to "zero" the ASCD for
the compressors in order to perform troubleshooting. To reset
all ASCDs for one cycle, press and release the UCB TEST/
RESET button once.
Flash codes that do and do not represent alarms are listed in
Table 54.
TABLE 54: UNIT CONTROL BOARD FLASH CODES
FLASH CODE
On Steady
1 Flash
DESCRIPTION
GREEN
LED
16
RED
LED
8
RED
LED
4
RED
LED
2
RED
LED
1
This is a Control Failure
-
-
-
-
-
Not Applicable
-
-
-
-
-
Flashing
Off
Off
On
Off
On
2 Flashes
Control waiting ASCD1
3 Flashes
HPS1 Compressor Lockout
Off
Off
Off
On
4 Flashes
HPS2 Compressor Lockout
Off
Off
On
Off
Off
5 Flashes
LPS1 Compressor Lockout
Off
Off
On
Off
On
6 Flashes
LPS2 Compressor Lockout
Off
Off
On
On
Off
7 Flashes
FS1 Compressor Lockout
Off
Off
On
On
On
8 Flashes
FS2 Compressor Lockout
Off
On
Off
Off
Off
9 Flashes
Ignition Control Locked Out / Ignition Control Failure
Off
On
Off
Off
On
10 Flashes
Compressors Locked Out on Low Outdoor Air Temperature1
Flashing
On
Off
On
Off
Flashing
On
Off
On
On
11 Flashes
12 Flashes
13 Flashes
14 Flashes
OFF
1.
Compressors locked out because the Economizer is using free
Cooling1
Unit Locked Out due to Fan Overload Switch Failure
Off
On
On
Off
Off
Flashing
On
On
Off
On
EEPROM Storage Failure
Off
On
On
On
Off
No Power or Control Failure
Off
Off
Off
Off
Off
1
Compressor Held Off due to Low Voltage
Non-alarm condition.
Unitary Products Group
59
127083-YIM-B-0606
TABLE 55: IGNITION CONTROL FLASH CODES
FLASHES
FAULT CONDITIONS
STEADY ON
Control Failure
HEARTBEAT
Normal Operation
CHECK
Control
1
Not Applicable
2
Pressure Switch
Stuck Closed
Pressure Switch
3
Pressure Switch Failed
To Close
Venter Pressure Switch
Vent Blocked
4
Limit Switch Open
Main Limit
AUX Limit
5
Flame Present With Gas
Off First Stage Gas Valve
Energized With W1 Off
Second Stage Gas Valve
Energized With First
Stage
Gas Valve Off
Gas Valve
Ignition Lockout
Gas Flow
Gas Pressure
Gas Valve
Flame Sensor
No Power Or Control
Failure
24VAC or Control
6
STEADY OFF
Check
Alarm
History
Reset All
ASCDs for
One Cycle
Non Alarm
Condition Green
LED Flashing
Current Alarm
Flashed
Red LED
FIGURE 30: UNIT CONTROL BOARD
60
Unitary Products Group
127083-YIM-B-0606
Monitored
Systems
Problem?
No
No
Call for
Heating?
Programming?
Yes
Yes
Program
Unit
Control
Board
Call for
Heat
Yes
Trip/Failure
Loss of
Call for
Heating?
No
Yes
Heat Off
No
Call for 2nd
Stage
Cooling
No
Energize ID
Blower Motor
Monitor
Call for
Cooling?
Yes
First
Stage?
Yes
No
Yes
No
Turn off ID
Blower Motor
Yes
No
Fan on
>30 secs?
Yes
Yes
No
Call for 1st
Stage
Cooling
Fan off
>10 secs?
No
Lossof Call
for ID Blower?
Call for
ID Blower?
No
Loss of Call
for Cooling?
Yes
Cool Off
FIGURE 31 - BASIC TROUBLESHOOTING FLOWCHART
Power to
Unit
Call for
heat?
No
Initialize ASCD
Yes
Voltage @
Gas Valve?
Yes
No
Energize ID
Blower
Montior
FIGURE 32 - POWER ON FLOW CHART
Unitary Products Group
61
127083-YIM-B-0606
H P
S w itc h
O p e n 1
N o
L o s s o f
L S In p u t
T r ip /F a ilu r e
L P
S w itc h O p e n
> 5 S e c s2
N o
Y e s
Y e s
T
c o m
in itia
in c r e a
v a
E n e r g iz e b lo w e r :
in c r e a s e in c id e n t
v a lu e b y 1
N o
Y e s
u rn
p r
te
s e
lv e
o ff
e s s o r;
A S C D ;
in c id e n t
b y 1
N o
F re e z e s ta t
O p e n ?1
Y e s
T u rn o ff
C o m p re s s o r,
in itia te A S C D ;
in c r e a s e in c id e n t
v a lu e b y 1
T u rn
c o m p r
in itia te
in c r e a s e
v a lu e
o ff
e s s o r,
A S C D ;
in c id e n t
b y 1
N o
In c id e n t
v a lu e > = 3 ?
N o
Y e s
N o
L S in p u t
r e g a in e d ?
Y e s
L o c k o n b lo w e r ;
fla g a la r m
N o
In c id e n t
v a lu e > = 3
Y e s
N o
In c id e n t
v a lu e > = 3
Y e s
L o c k -o u t
c o m p r e s s o r , fla g
a la r m
L o a d F o ffD
In c id e n t
v a lu e > = 3
Y e s
L o c k -o u t
c o m p r e s s o r , fla g
a la r m
L o c k
c o m p re s
o ff ID b lo
o ff c o n
fa n s , fla
-o u t
s o r,
w e r,
d e n s
g a la
tu rn
tu rn
e r
rm
M o n ito r
L o s s o f
F O S in p u t
> 5 S e c s ?
C a ll fo r
H e a t w /o u t G V
v o lta g e ?
N o
Y e s
Y e s
T u rn
c o m p r
c o n d e n
in itia te
N o
o ff fa n
e s s o r &
s e r fa n s ;
A S C D
G V
v o lta g e
w /o u t c a ll fo r
h e a t?
N o
G V v o lta g e
> 5 m in ?
Y e s
F la g A la r m
N o
v o lta g e > 5
m in ?
N o
Y e s
F la g a la r m , lo c k
o n ID b lo w e r
N o
In c id e n t
v a lu e > = 3
F O S in p u t
r e g a in e d ?
N o
Y e s
c o m
o ff
o
fa
L o c k -o
p re s s o
ID b lo w
ff c o n d e
n s , fla g
N o
F O S in p u t > 1 5
m in u te s ?
N o
Y e s
u t
rs ,
e r,
n s
a la
tu rn
tu rn
e r
rm
Y e s
In c r e a s e in c id e n t
v a lu e b y 1
F la g a la r m , tu r n o n
X lin e
Y e s
L o s s o f G V
V o lta g e ?
N o
E n e rg
b lo w e r ,
O ff D e
h e a
iz e ID
lo a d 'F a n
la y ' fo r
tin g
M o n ito r
1 T h e
2 T h e
a n d
lo n g
c o n
lo w
a d d
e r h
tro l b o a rd
-p re s s u re
itio n a l 3 0
a n d le s th
o n ly
s w itc
s e c o
e lo w
m
h
n d
-p
o n ito r s
is n o t m
s , th e c
re s s u re
th e in
o n ito
o n tro
s w itc
p u t
re d
l b o
h d
w h e n th e c o m p re s s o r re a
fo r th e fir s t 3 0 s e c o n d s o f
a r d tu r n s o ff th e a s s o c ia te
iffe r e n tly th a n o th e r in p u ts
lly is e n e r g iz e d .
c o m p r e s s o r a c tiv ity . T h e c o n tr o l b o a r d th e n m o n ito r s th e s w itc h to e n s u r e it c lo s e s . If th e s w itc h r e m a in s o p e n
d c o m p r e s s o r a n d in itia te s th e A S C D . O n c e it h a s c lo s e d d u r in g th e s ta r t u p p e r io d , th e c o n tr o l b o a r d n o
.
FIGURE 33 - TRIP FAILURE FLOW CHART
62
Unitary Products Group
127083-YIM-B-0606
COOLING TROUBLESHOOTING GUIDE
On calls for cooling, if the compressors are operating but the
supply air blower motor does not energize after a short delay
(the room thermostat fan switch is in the “AUTO” position):
1.
If installed, check the position of the economizer blades.
If the blades are open, the economizer is providing free
cooling and the compressors will not immediately operate. If both stages of cooling are requested simultaneously and the economizer provides free cooling,
following a short delay compressor #1 will be energized
unless it is locked out. If compressor #1 is locked out,
compressor #2 is energized. Compressor #2 is always
energized in place of compressor #1 when compressor
#1 is requested but locked out.
2.
If no economizer is installed or the economizer is not
opening to provide free cooling and compressor #1 does
not energize on a call for cooling, check for line voltage
at the compressor contactor, M1, and that the contactor
is pulled in. Check for loose wiring between the contactor and the compressor.
3.
If M3 is not pulled in, check for 24 volts at the M3 coil. If
24 volts are present at M3 but M3 is not pulled in,
replace the contactor.
If M1 is pulled in and voltage is supplied at M1, lightly
touch the compressor housing. If it is hot, the compressor may be off on inherent protection. Cancel any calls
for cooling and wait for the internal overload to reset.
Test again when cool.
4.
Failing the above, if there is line voltage supplied at M3,
M3 is pulled in, and the supply air blower motor still does
not operate, replace the motor.
If M1 is not pulled in, check for 24 volts at the M1 coil. If
24 volts are present and M1 is not pulled in, replace the
contactor.
5.
If 24 volts is not present at M3, check that 24 volts is
present at the UCB supply air blower motor terminal,
“FAN”. If 24 volts is present at the FAN, check for loose
wiring between the UCB and M3.
Failing the above, if voltage is supplied at M1, M1 is
pulled in, and the compressor still does not operate,
replace the compressor.
6.
If 24 volts is not present at M1, check for 24 volts at the
UCB terminal, C1. If 24 volts is present, check for loose
wiring between C1 and the compressor contactor.
7.
If 24 volts is not present at the C1 terminal, check for 24
volts from the room thermostat at the UCB Y1 terminal. If
24 volts is not present from the room thermostat, check
for the following:
1.
Turn the thermostat fan switch to the ON position. If the
supply air blower motor does not energize, go to Step 3.
2.
If the blower motor runs with the fan switch in the ON
position but will not run after the first compressor has
energized when the fan switch is in the AUTO position,
check the room thermostat for contact between R and G
in the AUTO position during calls for cooling.
3.
If the supply air blower motor does not energize when
the fan switch is set to ON, check that line voltage is
being supplied to the contacts of the M3, contactor, and
that the contactor is pulled in. Check for loose wiring
between the contactor and the supply air blower motor.
4.
If M3 is pulled in and voltage is supplied to M3, lightly
touch the supply air blower motor housing. If it is hot, the
motor may be off on internal protection. Cancel any
thermostat calls and set the fan switch to AUTO. Wait for
the internal overload to reset. Test again when cool.
5.
6.
7.
8.
If 24 volts is not present at the “FAN” terminal, check for
24 volts from the room thermostat. If 24 volts are not
present from the room thermostat, check for the following:
a.
9.
On calls for cooling, the supply air blower motor is operating
but compressor #1 is not (the room thermostat fan switch is in
the “AUTO” position):
Proper operation of the room thermostat (contact
between R and G with the fan switch in the ON position and in the AUTO position during operation
calls).
a.
24 volts at the thermostat Y1 terminal
b.
Proper wiring between the room thermostat and the
UCB, i.e. Y1 to Y1, Y2 to Y2, and
b.
Proper wiring between the room thermostat and the
UCB, and
c.
Loose wiring from the room thermostat to the UCB
c.
Loose wiring from the room thermostat to the UCB
8.
If 24 volts is present at the UCB Y1 terminal, the compressor may be out due to an open high-pressure switch,
low-pressure switch, or freezestat. Check for 24 volts at
the HPS1, LPS1, and FS1 terminals of the UCB. If a
switch has opened, there should be a voltage potential
between the UCB terminals, e.g. if LPS1 has opened,
there will be a 24-volt potential between the LPS1 terminals.
9.
If 24 volts is present at the UCB Y1 terminal and none of
the protection switches have opened, the UCB may have
If 24 volts is present at the room thermostat but not at the
UCB, check for proper wiring between the thermostat
and the UCB, i.e. that the thermostat G terminal is connected to the G terminal of the UCB, and for loose wiring.
10. If the thermostat and UCB are properly wired, replace
the UCB.
Unitary Products Group
63
127083-YIM-B-0606
locked out the compressor for repeat trips. The UCB
should be flashing an alarm code. If not, press and
release the ALARMS button on the UCB. The UCB will
flash the last five alarms on the LED. If the compressor is
locked out, cancel any call for cooling. This will reset any
compressor lock outs.
NOTE: While the above step will reset any lockouts, compressor #1 may be held off for the ASCD. See the
next step.
10. If 24 volts is present at the UCB Y1 terminal and none of
the switches are open and the compressor is not locked
out, the UCB may have the compressor in an ASCD.
Check the LED for an indication of an ASCD cycle. The
ASCD should time out within 5 minutes. Press and
release the TEST button to reset all ASCDs.
11. If 24 volts is present at the UCB Y1 terminal and the
compressor is not out due to a protective switch trip,
repeat trip lock out, or ASCD, the economizer terminals
of the UCB may be improperly wired. Check for 24 volts
at the Y1 “OUT” terminal of the UCB. If 24 volts is
present, trace the wiring from Y1 “OUT” for incorrect wiring. If 24 volts is not present at the Y1 “OUT” terminal,
the UCB must be replaced.
12. For units without economizers: If 24 volts is present at
the Y1 OUT terminal, check for 24 volts at the Y1
“ECON” terminal. If 24 volts is not present, check for
loose wiring from the Y1 “OUT” terminal to the Mate-NLock plug, the jumper in the Mate-N-Lock plug, and in
the wiring from the Mate-N-Lock plug to the Y1 “ECON”
terminal.
13. For units with economizers: If 24 volts is present at the
Y1 “OUT” terminal, check for 24 volts at the Y1 “ECON”
terminal. If 24 volts is not present, check for loose wiring
from the Y1 “OUT” terminal to the Mate-N-Lock plug, a
poor connection between the UCB and economizer
Mate-N-Lock plugs, loose wiring from the Mate-N-Lock
plug to the economizer, back to the Mate-N-Lock plug,
and from the Mate-N-Lock plug to the Y1 “ECON” terminal. If nothing is found, the economizer control may have
faulted and is failing to return the 24-volt “call” to the Y1
“ECON” terminal even though the economizer is not providing free cooling. To test, disconnect the Mate-N-Locks
and jumper between the WHITE and YELLOW wires of
the UCB’s Mate-N-Lock plug. If compressor #1 energizes, there is a fault in the economizer wiring or the
economizer control.
14. The UCB can be programmed to lock out compressor
operation during free cooling and in low ambient conditions. These options are not enabled by default. Local
distributors can test the UCB for this programming.
For units with factory installed economizers, the UCB is
programmed to lock out compressor operation when the
LAS set point is reached.
64
For units without factory installed or with field installed
economizers, the UCB allows compressor operation all
the time. This programming can be checked or changed
by the local distributor.
15. If none of the above corrected the error, test the integrity
of the UCB. Disconnect the C1 terminal wire and jumper
it to the Y1 terminal. DO NOT jump the Y1 to C1 terminals. If the compressor engages, the UCB has faulted.
16. If none of the above correct the error, replace the UCB.
On calls for the second stage of cooling, the supply air blower
motor and compressor #1 are operating but compressor #2 is
not (the room thermostat fan switch is in the “AUTO” position):
1.
If installed, check the position of the economizer blades.
If the blades are open, the economizer is providing free
cooling. If the second stage of cooling is requested, following a short delay, compressor #1 will be energized
unless it is locked out. Typically, compressor #2 is energized only during free cooling if the call for the second
stage of cooling persists for 20 minutes.
2.
Compressor #2 will not energize simultaneously with
compressor #1 if a call for both stages of cooling is
received. The UCB delays compressor #2 by 30 seconds to prevent a power surge. If after the delay compressor #2 does not energize on a second stage call for
cooling, check for line voltage at the compressor contactor, M2, and that the contactor is pulled in. Check for
loose wiring between the contactor and the compressor.
3.
If M2 is pulled in and voltage is supplied at M2, lightly
touch the compressor housing. If it is hot, the compressor may be off on inherent protection. Cancel any calls
for cooling and wait for the internal overload to reset.
Test again when cool.
4.
If M2 is not pulled in, check for 24 volts at the M2 coil. If
24 volts is present and M2 is not pulled in, replace the
contactor.
5.
Failing the above, if voltage is supplied at M2, M2 is
pulled in, and the compressor still does not operate,
replace the compressor.
6.
If 24 volts is not present at M2, check for 24 volts at the
UCB terminal, C2. If 24 volts are present, check for
loose wiring between C2 and the compressor contactor.
7.
If 24 volts is not present at the C2 terminal, check for 24
volts from the room thermostat at the UCB Y2 terminal. If
24 volts is not present from the room thermostat, check
for the following:
a.
24 volts at the thermostat Y2 terminal
b.
Proper wiring between the room thermostat and the
UCB, i.e. Y1 to Y1, Y2 to Y2, and
c.
Loose wiring from the room thermostat to the UCB
Unitary Products Group
127083-YIM-B-0606
8.
9.
If 24 volts is present at the UCB Y2 terminal, the compressor may be out due to an open high-pressure switch,
low-pressure switch, or freezestat. Check for 24 volts at
the HPS2, LPS2, and FS2 terminals of the UCB. If a
switch has opened, there should be a voltage potential
between the UCB terminals, e.g. if LPS2 has opened,
there will be 24 volts of potential between the LPS2 terminals.
If 24 volts is present at the UCB Y2 terminal and none of
the protection switches have opened, the UCB may have
locked out the compressor for repeat trips. The UCB
should be flashing a code. If not, press and release the
ALARMS button on the UCB. The UCB will flash the last
five alarms on the LED. If the compressor is locked out,
remove any call for cooling at the thermostat or by disconnecting the thermostat wiring at the Y2 UCB terminal.
This will reset any compressor lock outs.
NOTE: While the above step will reset any lock outs, compressor #1 will be held off for the ASCD, and compressor #2 may be held off for a portion of the
ASCD. See the next step.
2.
Check for line voltage at the compressor contactor, M1,
and that the contactor is pulled in. Check for loose wiring
between the contactor and the compressor.
3.
If M1 is pulled in and voltage is supplied at M1, lightly
touch the compressor housing. If it is hot, the compressor may be off on inherent protection. Cancel any calls
for cooling and wait for the internal overload to reset.
Test again when cool.
4.
If M1 is not pulled in, check for 24 volts at the M1 coil. If
24 volts is present and M1 is not pulled in, replace the
contactor.
5.
Failing the above, if voltage is supplied at M1, M1 is
pulled in, and the compressor still does not operate,
replace the compressor.
6.
If 24 volts is not present at M1, check for 24 volts at the
UCB terminal, C1. If 24 volts is present, check for loose
wiring between C1 and the compressor contactor.
7.
If 24 volts is not present at the C1 terminal, check for 24
volts from the room thermostat at the UCB Y1 terminal.
If 24 volts are not present at the UCB Y1 terminal, the
UCB may have faulted. Check for 24 volts at the Y1
ECON terminal. If 24 volts is not present at Y1 “ECON”,
the UCB has faulted. The UCB should de-energize all
compressors on a loss of call for the first stage of cooling, i.e. a loss if 24 volts at the Y1 terminal.
8.
If 24 volts are present at the UCB Y1 terminal, the compressor may be out due to an open high-pressure switch,
low-pressure switch, or freezestat. Check for 24 volts at
the HPS1, LPS1, and FS1 terminals of the UCB. If a
switch has opened, there should be a voltage potential
between the UCB terminals, e.g. if LPS1 has opened,
there will be a 24-volt potential between the LPS1 terminals.
9.
If 24 volts is present at the UCB Y1 terminal and none of
the protection switches have opened, the UCB may have
locked out the compressor for repeat trips. The UCB
should be flashing a code. If not, press and release the
ALARMS button on the UCB. The UCB will flash the last
five alarms on the LED. If the compressor is locked out,
remove any call for cooling. This will reset any compressor lock outs.
10. If 24 volts is present at the UCB Y2 terminal and none of
the switches are open and the compressor is not locked
out, the UCB may have the compressor in an ASCD.
Check the LED for an indication of an ASCD cycle. The
ASCD should time out within 5 minutes. Press and
release the TEST button to reset all ASCDs.
11. The UCB can be programmed to lock out compressor
operation during free cooling and in low ambient conditions. These options are not enabled by default. Local
distributors can test the UCB for this programming.
For units with factory installed economizers, the UCB is
programmed to lock out compressor operation when the
LAS set point is reached.
For units without factory installed or with field installed
economizers, the UCB allows compressor operation all
the time. This programming can be checked or changed
by the local distributor.
12. If none of the above corrected the error, test the integrity
of the UCB. Disconnect the C2 terminal wire and jumper
it to the Y2 terminal. DO NOT jump the Y2 to C2 terminals. If the compressor engages, the UCB has faulted.
13. If none of the above correct the error, replace the UCB.
On a call for cooling, the supply air blower motor and compressor #2 are operating but compressor #1 is not (the room
thermostat fan switch is in the “AUTO” position):
1.
Compressor #2 is energized in place of compressor #1
when compressor #1 is unavailable for cooling calls.
Check the UCB for alarms indicating that compressor #1
is locked out. Press and release the ALARMS button if
the LED is not flashing an alarm.
Unitary Products Group
NOTE: While the above step will reset any lock outs, compressor #2 will be held off for the ASCD, and compressor #1 may be held off for a portion of the
ASCD. See the next step.
10. If 24 volts is present at the UCB Y1 terminal and none of
the switches are open and the compressor is not locked
out, the UCB may have the compressor in an ASCD.
Check the LED for an indication of an ASCD cycle. The
ASCD should time out within 5 minutes. Press and
release the TEST button to reset all ASCDs.
65
127083-YIM-B-0606
11. If 24 volts is present at the UCB Y1 terminal and the
compressor is not out due to a protective switch trip,
repeat trip lock out, or ASCD, the economizer terminals
of the UCB may be improperly wired. Check for 24 volts
at the Y1 “OUT” terminal of the UCB. If 24 volts is
present, trace the wiring from Y1 “OUT” for incorrect wiring. If 24 volts is not present at the Y1 “OUT” terminal,
the UCB must be replaced.
12. For units without economizers: If 24 volts is present at
the Y1 “OUT” terminal, check for 24 volts at the Y1
“ECON” terminal. If 24 volts is not present, check for
loose wiring from the Y1 “OUT” terminal to the Mate-NLock plug, the jumper in the Mate-N-Lock plug, and in
the wiring from the Mate-N-Lock plug to the Y1 “ECON”
terminal.
For units with economizers:If 24 volts is present at the
Y1 “OUT” terminal, check for 24 volts at the Y1 “ECON”
terminal. If 24 volts is not present, check for loose wiring
from the Y1 “OUT” terminal to the Mate-N-Lock plug, a
poor connection between the UCB and economizer
Mate-N-Lock plugs, loose wiring from the Mate-N-Lock
plug to the economizer, back to the Mate-N-Lock plug,
and from the Mate-N-Lock plug to the Y1 “ECON”
terminal. The economizer control may have faulted and
is not returning the 24 volts to the Y1 “ECON” terminal
even though the economizer is not providing free
cooling. To test the economizer control, disconnect the
Mate-N-Locks and jumper between the WHITE and
YELLOW wires of the UCB’s Mate-N-Lock plug.
13. The UCB can be programmed to lock out compressor
operation during free cooling and in low ambient conditions. These options are not enabled by default. They
can be checked by local distributors.
The furnace may shut down on a high temperature
condition during the procedure. If this occurs, the
UCB energize the supply air blower motor until the
high temperature limit has reset. Caution should be
used at all times as the supply air blower may energize regardless of the room thermostat fan switch
position.
1.
Place the thermostat fan switch in the “ON” position. If
the supply air blower motor energizes, go to Step 9.
2.
If the supply air blower motor does not energize when
the fan switch is set to “ON,” check that line voltage is
being supplied to the contacts of the M3 contactor, and
that the contactor is pulled in. Check for loose wiring
between the contactor and the supply air blower motor.
3.
If M3 is pulled in and voltage is supplied at M3, lightly
touch the supply air blower motor housing. If it is hot, the
motor may be off on inherent protection. Cancel any
thermostat calls and set the fan switch to “AUTO”, wait
for the internal overload to reset. Test again when cool.
4.
If M3 is not pulled in, check for 24 volts at the M3 coil. If
24 volts is present at M3 but M3 is not pulled in, replace
the contactor.
5.
Failing the above, if there is line voltage supplied at M3,
M3 is pulled in, and the supply air blower motor still does
not operate, replace the motor.
6.
If 24 volts is not present at M3, check that 24 volts is
present at the supply air blower motor terminal on the
UCB. If 24 volts is present at the UCB terminal, check
for loose wiring between the UCB and M3.
For units with factory installed economizers, the UCB is
programmed to lock out compressor operation when the
LAS set point is reached.
a.
For units without factory installed or with field installed
economizers, the UCB allows compressor operation all
the time. This programming can be checked or changed
by the local distributor.
14. If none of the above corrected the error, test the integrity
of the UCB. Disconnect the C1 terminal wire and jumper
it to the Y1 terminal. DO NOT jump the Y1 to C1 terminals. If the compressor engages, the UCB has faulted.
15. If none of the above correct the error, replace the UCB.
GAS HEAT TROUBLESHOOTING GUIDE
On calls for heating, the draft motor operates and the furnace
lights but the supply air blower motor does not energize after
a short delay (the room thermostat fan switch is in “AUTO”
position).
66
If 24 volts is not present at the UCB supply air
blower motor terminal, check for 24 volts from the
room thermostat. If 24 volts is not present from the
room thermostat, check for the following:
i.
Proper operation of the room thermostat (contact between R and G with the fan switch in the
“ON” position and in the “AUTO” position during
operation calls)
ii.
Proper wiring between the room thermostat and
the UCB, and
iii.
Loose wiring from the room thermostat to the
UCB
7.
If 24 volts is present at the room thermostat but not at the
UCB, check for proper wiring between the thermostat and
the UCB, i.e. that the thermostat G terminal is connected
to the G terminal of the UCB, and for loose wiring.
8.
If the thermostat and UCB are properly wired, replace
the UCB.
Unitary Products Group
127083-YIM-B-0606
9.
If the blower motor runs with the fan switch in the “ON”
position but does not run shortly after the furnace has
ignited when the fan switch is in the “AUTO” position,
check the room thermostat for contact between R and G
during “W1” calls.
switch. If present, go to step 4. If 24 volts is not present,
the either pressure or rollout switch is not closed. Or the
draft motor is not sufficiently evacuating the heat
exchanger tubes or the pressure switch has failed.
Check the operation of the pressure switch. Check the
line voltage to the unit; if line voltage is low, call the local
power company. If the problem persists, the draft motor
may need replacement.
On calls for heating, the supply air blower operates but the
draft motor does not (the room thermostat fan switch is in the
“AUTO” position).
4.
The draft motor has inherent protection. If the motor
shell is hot to the touch, wait for the internal overload to
reset.
If the furnace is hot, it may be out on a high temperature
limit open; wait for limit reset.
5.
If all are intact replace the ICB.
2.
If the motor shell is cold with the room thermostat calling
for heat, check for line voltage at the motor leads. If line
voltage is present, replace the draft motor.
The draft motor runs and the spark ignitor sparks at the
burner, but the burner does not ignite and a gas odor is not
detected at the draft motor outlet.
3.
If line voltage is not present, check for line voltage on the
ignition control at the “inducer” terminal draft motor relay
(DMR or DMC) contacts in the main control box and
check to see if the (DMR or DMC) is pulled in.
1.
Check to ensure gas is being supplied to the unit. Confirm that the gas pressure to the unit is within the proper
limits as described in the “POST START CHECKLIST”.
2.
Check the voltage at the gas valve and at the gas valve
terminals on the ICB. Check all wiring between the ICB
and the gas valve. Check to make sure the ground connections are intact.
3.
If 24 volts is present, remove the pilot burner and the orifice. The removal procedure is described in
“BURNER/ORIFICE INSPECTION/SERVICING.” Inspect
the orifice for obstruction. If it is clear, replace the gas
valve.
1.
The draft motor runs but the furnace does not light and the
spark ignitor does not spark.
1.
2.
3.
Check for 24 volts at the spark ignitor from the ignition
control board (ICB). Check the 24-volt wiring from the
ICB to the spark ignitor. Check for 24 volts at the ICB
spark ignitor terminal.
Check the ground wiring for the ICB and the gas valve is
intact and making good electrical connection. Check the
ceramic insulator on the spark ignitor for breaks or
cracks. Replace the spark ignitor if damaged.
With the draft motor running, check for 24 volts at the
pressure switch terminal on the ICB. If not present,
check for 24 volts on the terminal from the pressure
Unitary Products Group
Main burners light but exhibit erratic flame characteristics.
1.
Check the main burner orifices for obstruction and alignment. The removal procedure is described in
“BURNER/ORIFICE INSPECTION/SERVICING”. Clean
67
Subject to change without notice. Printed in U.S.A.
Copyright © 2006 by Unitary Products Group. All rights reserved.
Unitary
Products
Group
127083-YIM-B-0606
Supersedes: 127083-YIM-A-0405
5005
York
Drive
Norman
OK
73069
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