York B3CH 048 and 060 Heat Pump Installation manual

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York B3CH 048 and 060 Heat Pump Installation manual | Manualzz
INSTALLATION
MANUAL - 50 Hz
CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 5
®
SINGLE PACKAGE HEAT PUMP
HIGH EFFICIENCY
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
BP090 and 120
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
(7-1/2 and 10 TON)
RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
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.
CAUTION:
READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
66307-YIM-B-0606
66307-YIM-B-0606
TABLE OF CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . 5
BELT TENSION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
AIR BALANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
CHECKING AIR QUANTITY . . . . . . . . . . . . . . . . . . . . . . 30
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
METHOD ONE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
METHOD TWO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
REFERENCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SUPPLY AIR DRIVE ADJUSTMENT . . . . . . . . . . . . . . . 31
RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SEQUENCE OF OPERATIONS OVERVIEW . . . . . . . . . 33
COOLING SEQUENCE OF OPERATION. . . . . . . . . . . . 33
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
INSTALLATION SAFETY INFORMATION . . . . . . . . . . . . 8
PRECEDING INSTALLATION . . . . . . . . . . . . . . . . . . . . . . 8
LIMITATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
LOCATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
RIGGING AND HANDLING . . . . . . . . . . . . . . . . . . . . . . . 10
CLEARANCES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
DUCT COVERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
CONDENSATE DRAIN . . . . . . . . . . . . . . . . . . . . . . . . . . 15
COMPRESSORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
THERMOSTAT WIRING . . . . . . . . . . . . . . . . . . . . . . . . . 15
POWER AND CONTROL WIRING . . . . . . . . . . . . . . . . . 15
POWER WIRING DETAIL . . . . . . . . . . . . . . . . . . . . . . . . 16
FACTORY INSTALLED OPTIONS/
FIELD INSTALLED ACCESSORIES . . . . . . . . . . . . . . . . 19
ELECTRIC HEAT ACCESSORY . . . . . . . . . . . . . . . . . . . .
ELECTRIC HEAT OPTION . . . . . . . . . . . . . . . . . . . . . . . .
MOTORIZED OUTDOOR DAMPER . . . . . . . . . . . . . . . . .
ECONOMIZER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
POWER EXHAUST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RAIN HOOD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19
19
20
20
20
20
ECONOMIZER AND POWER EXHAUST SET
POINT ADJUSTMENTS AND INFORMATION . . . . . . . . 20
MINIMUM POSITION ADJUSTMENT . . . . . . . . . . . . . . . .
ENTHALPY SET POINT ADJUSTMENT . . . . . . . . . . . . . .
POWER EXHAUST DAMPER SET POINT (WITH OR
WITHOUT POWER EXHAUST). . . . . . . . . . . . . . . . . . . . .
INDOOR AIR QUALITY AQ . . . . . . . . . . . . . . . . . . . . . . . .
2
20
20
CONTINUOUS BLOWER . . . . . . . . . . . . . . . . . . . . . . . . .
INTERMITTENT BLOWER . . . . . . . . . . . . . . . . . . . . . . . .
NO OUTDOOR AIR OPTIONS . . . . . . . . . . . . . . . . . . . . .
ECONOMIZER WITH SINGLE ENTHALPY SENSOR . . .
ECONOMIZER WITH DUAL ENTHALPY SENSORS . . . .
ECONOMIZER (SINGLE OR DUAL) WITH POWER
EXHAUST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MOTORIZED OUTDOOR AIR DAMPERS . . . . . . . . . . . .
33
33
33
33
34
34
34
COOLING OPERATION ERRORS . . . . . . . . . . . . . . . . . 34
HIGH-PRESSURE LIMIT SWITCH . . . . . . . . . . . . . . . . . .
LOW-PRESSURE LIMIT SWITCH . . . . . . . . . . . . . . . . . .
FREEZESTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LOW AMBIENT COOLING . . . . . . . . . . . . . . . . . . . . . . . .
34
34
34
34
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
COMPRESSOR PROTECTION . . . . . . . . . . . . . . . . . . . 35
FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
RESET. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
HEATING SEQUENCE OF OPERATION . . . . . . . . . . . . 35
ELECTRIC HEAT OPERATION ERRORS . . . . . . . . . . . 36
TEMPERATURE LIMIT . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LIMIT SWITCH (LS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RESET. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
36
36
36
36
36
ELECTRIC HEAT ANTICIPATOR SETPOINTS . . . . . . . 36
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
PRESTART CHECK LIST . . . . . . . . . . . . . . . . . . . . . . . .
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . .
POST START CHECK LIST . . . . . . . . . . . . . . . . . . . . . .
SUPERHEAT CHARGING METHOD . . . . . . . . . . . . . . .
36
37
37
37
21
21
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . 39
PHASING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
BLOWER ROTATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
PREDATOR® FLASH CODES . . . . . . . . . . . . . . . . . . . . 39
COOLING TROUBLESHOOTING GUIDE. . . . . . . . . . . . 41
Unitary Products Group
66307-YIM-B-0606
LIST OF FIGURES
Fig. #
Pg. #
Fig. #
Pg. #
1
UNIT SHIPPING BRACKET . . . . . . . . . . . . . . . . . . . . . 8
13 SIDE PANELS WITH HOLE PLUGS . . . . . . . . . . . . . 14
2
CONDENSER COIL COVERING . . . . . . . . . . . . . . . . . 8
14 RETURN DOWNFLOW PLENUM WITH PANEL . . . . 15
3
COMPRESSOR SECTION . . . . . . . . . . . . . . . . . . . . . . 8
15 DISCHARGE PANEL IN PLACE . . . . . . . . . . . . . . . . 15
4
PREDATOR® COMPONENT LOCATION . . . . . . . . . . 9
16 CONDENSATE DRAIN. . . . . . . . . . . . . . . . . . . . . . . . 15
5
UNIT 4 POINT LOAD . . . . . . . . . . . . . . . . . . . . . . . . . 10
17 ELECTRONIC THERMOSTAT FIELD WIRING . . . . . 16
6
UNIT 6 POINT LOAD . . . . . . . . . . . . . . . . . . . . . . . . . 10
18 FIELD WIRING 24 VOLT THERMOSTAT . . . . . . . . . 17
7
UNIT CENTER OF GRAVITY . . . . . . . . . . . . . . . . . . . 10
19 FIELD WIRING DISCONNECT. . . . . . . . . . . . . . . . . . 17
8
UNIT DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 11
20 ENTHALPY SET POINT CHART . . . . . . . . . . . . . . . . 21
9
BOTTOM DUCT OPENINGS . . . . . . . . . . . . . . . . . . . 12
21 HONEYWELL ECONOMIZER CONTROL W7212 . . . 22
10 REAR DUCT DIMENSIONS . . . . . . . . . . . . . . . . . . . . 13
22 BELT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . 23
11 PREDATOR® ROOF CURB DIMENSIONS . . . . . . . . 14
23 DRY COIL DELTA P . . . . . . . . . . . . . . . . . . . . . . . . . . 31
12 SUNLINE™ TO PREDATOR® TRANSITION
ROOF CURBS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
24 UNIT CONTROL BOARD . . . . . . . . . . . . . . . . . . . . . . 40
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66307-YIM-B-0606
LIST OF TABLES
Tbl. #
Pg. #
1
UNIT TEMPERATURE LIMITATIONS . . . . . . . . . . . . . 9
2
UNIT VOLTAGE LIMITATIONS . . . . . . . . . . . . . . . . . . 9
3
UNIT WEIGHTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4
4 POINT LOAD WEIGHT . . . . . . . . . . . . . . . . . . . . . . 10
5
6 POINT LOAD WEIGHT . . . . . . . . . . . . . . . . . . . . . . 10
6
UNIT CLEARANCES . . . . . . . . . . . . . . . . . . . . . . . . . 11
7
CONTROL WIRE SIZES. . . . . . . . . . . . . . . . . . . . . . . 15
8
ELECTRICAL DATA - 7-1/2 TON HP . . . . . . . . . . . . . 18
9
ELECTRICAL DATA - 10 TON HP . . . . . . . . . . . . . . . 18
10 PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
11 ELECTRIC HEAT MINIMUM SUPPLY AIR . . . . . . . . 20
12 SUPPLY AIR LIMITATIONS . . . . . . . . . . . . . . . . . . . . 22
13 BLOWER PERFORMANCE 7-1/2 TON
STANDARD MOTOR - SIDE DUCT (IMPERIAL) . . . . 24
14 BLOWER PERFORMANCE 7-1/2 TON
STANDARD MOTOR - SIDE DUCT (METRIC) . . . . . 24
15 BLOWER PERFORMANCE 7-1/2 TON
OPTIONAL MOTOR - SIDE DUCT (IMPERIAL) . . . . . 24
16 BLOWER PERFORMANCE 7-1/2 TON
OPTIONAL MOTOR - SIDE DUCT (METRIC) . . . . . . 25
17 BLOWER PERFORMANCE 10 TON
STANDARD MOTOR - SIDE DUCT (IMPERIAL) . . . . 25
18 BLOWER PERFORMANCE 10 TON
STANDARD MOTOR - SIDE DUCT (METRIC) . . . . . 25
19 BLOWER PERFORMANCE 10 TON
OPTIONAL MOTOR - SIDE DUCT (IMPERIAL) . . . . . 26
Tbl. #
Pg. #
20 BLOWER PERFORMANCE 10 TON
OPTIONAL MOTOR - SIDE DUCT (METRIC) . . . . . . 26
21 BLOWER PERFORMANCE 7-1/2 TON
STANDARD MOTOR - DOWNSHOT (IMPERIAL). . . 27
22 BLOWER PERFORMANCE 7-1/2 TON
STANDARD MOTOR - DOWNSHOT (METRIC) . . . . 27
23 BLOWER PERFORMANCE 7-1/2 TON
OPTIONAL MOTOR - DOWNSHOT (IMPERIAL) . . . 27
24 BLOWER PERFORMANCE 7-1/2 TON
OPTIONAL MOTOR - DOWNSHOT (METRIC) . . . . . 28
25 BLOWER PERFORMANCE 10 TON
STANDARD MOTOR - DOWNSHOT (IMPERIAL). . . 28
26 BLOWER PERFORMANCE 10 TON
STANDARD MOTOR - DOWNSHOT (METRIC). . . . 28
27 BLOWER PERFORMANCE 10 TON
OPTIONAL MOTOR - DOWNSHOT (IMPERIAL) . . . 29
28 BLOWER PERFORMANCE 10 TON OPTIONAL
MOTOR - DOWNSHOT (METRIC). . . . . . . . . . . . . . . 29
29 INDOOR BLOWER SPECIFICATIONS . . . . . . . . . . . 29
30 ADDITIONAL STATIC RESISTANCE - IMPERIAL . . 32
31 ADDITIONAL STATIC RESISTANCE - METRIC . . . . 32
32 MOTOR SHEAVE DATUM . . . . . . . . . . . . . . . . . . . . . 33
33 ELECTRIC HEAT LIMIT SETTING. . . . . . . . . . . . . . . 36
34 HEAT PUMP ANTICIPATOR SETPOINTS . . . . . . . . 36
35 SUPERHEAT CHARGING . . . . . . . . . . . . . . . . . . . . . 38
36 COOLING SUPERHEAT 7-1/2 TON . . . . . . . . . . . . . 38
37 COOLING SUPERHEAT 10 TON. . . . . . . . . . . . . . . . 39
38 UNIT CONTROL BOARD FLASH CODES. . . . . . . . . 40
4
Unitary Products Group
66307-YIM-B-0606
GENERAL
YORK® Predator® Heat Pump units are single package,
reverse cycle air conditioners 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 and duct connections. The electric heaters
have nickel-chrome elements and utilize single-point power
connection.
Wear safety glasses and work gloves. Use quenching cloth
and have a fire extinguisher available during brazing operations.
INSPECTION
As soon as a unit is received, it should be inspected for possible damage during transit. If damage is evident, the extent of
the damage should be noted on the carrier’s freight bill. A
separate request for inspection by the carrier’s agent should
be made in writing.
SAFETY CONSIDERATIONS
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 National Electric
Code, ANSI/NFPA No. 70 - latest edition U.S.A. and Canadian Electric Code, CSA C22.1 in Canada.
Unitary Products Group
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
66307-YIM-B-0606
REFERENCE
Additional information is available in the following reference
forms:
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.
• Technical Guide - 259336
• General Installation - 66307
• Pre-start & Post-start Check List
• Economizer Accessory Downflow Factory Installed
Downflow Field Installed
Horizontal Field Installed
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.
• Motorized Outdoor Air Damper
• Manual Outdoor Air Damper (0-100%)
• Manual Outdoor Air Damper (0-35%)
• Electric Heater Accessory
Incorrect installation may create a condition where the
operation of the product could cause personal injury
or property damage.
• Unit Renewal Parts List
RENEWAL PARTS
Contact your local York® parts distribution center for authorized replacement parts.
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.
APPROVALS
Design certified by CSA as follows:
1.
For use as a cooling only unit, cooling unit with supplemental electric heat forced air furnace.
2.
For outdoor installation only.
6
Unitary Products Group
66307-YIM-B-0606
NOMENCLATURE
7.5-10.0 Ton York® Model Number Nomenclature
B P 090 C00 A 7 A AA 3 0 1 2 4 A
Product Category
Product Style
A = Style A
B = Style B
C = Style C
B = HP, Single Pkg., R-22
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.
P = 9.3-10.6 EER HP
SS Drain Pan
Honeywell Controller, DFS, APS
Nominal Cooling Capacity
Simplicity IntelliComfort Controller
090 = 7.5 Ton
120 = 10.0 Ton
Simplicity IntelliComfort Controller w/ModLinc
2" Pleated filters
BAS Ready Unit with Belimo Economizer
Shipping Bag
Heat Type and Nominal Heat Capacity
Any Combination of Additional Options that Don’t Have an Option Code Pre-assigned
C00 = Cooling Only. No heat installed
Product Generation
Electric Heat Options
3 = Third Generation
4 = Fourth Generation
E09 = 9 KW
E18 = 18 KW
E24 = 24 KW
E36 = 36 KW
E54 = 54 KW
Additional Options
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
7 = 380/415-3-50
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
RC = Coil Guard, Shipping Bag & American Flag
TA = Technicoat Condenser Coil
TJ = Technicoat Evaporator Coil
TS = Technicoat Evaporator & Condenser Coils
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
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66307-YIM-B-0606
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.
Toolless
Doorknobs
This equipment is not to be used for temporary heating
of buildings or structures under construction.
PRECEDING INSTALLATION
1.
Installation
Instruction
Packet
Remove the two screws holding the brackets in the front,
rear and compressor side fork-lift slots.
FIGURE 3 Bracket
Screws
FIGURE 1 -
Turn down
UNIT SHIPPING BRACKET
2.
Turn each bracket toward the ground and the protective
plywood covering will drop to the ground.
3.
Remove the condenser coil external protective covering
prior to operation.
4.
Remove the toolless doorknobs and instruction packet
prior to installation.
LIMITATIONS
These units must be installed in accordance with the following:
In U.S.A.:
1.
National Electrical Code, ANSI/NFPA No. 70 - Latest
Edition
2.
Local building codes
3.
Local electric utility requirements
In Canada:
Condenser
Coil External
Protective
Covering
Barometric
Relief Hood in
Shipping Location (if included)
FIGURE 2 -
COMPRESSOR SECTION
CONDENSER COIL COVERING
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 2 & 3 for unit application data.
If components are to be added to a unit to meet local codes,
they are to be installed at the dealer’s and/or 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 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.
8
This furnace is not to be used for temporary heating of buildings or structures under construction.
Unitary Products Group
66307-YIM-B-0606
Terminal block for
hi-voltage connection
Simplicity™ Control Disconnect location
board w/screw con- (optional disconnect switch)
nector for T-stat wiring and network
connection.
Filter access (2” throw-away)
Filter drier (solid
core)
Condenser
section
Second model nameplate inside hinged
access panel
Slideout motor
& blower
assembly for
easy access
adjustment &
service
Belt-drive
blower motor
Compressor #2
access (highefficiency compressor)
Compressor #1 access (highefficiency compressor)
Slide-out drain pan
with steel 3/4” FPT
connection
Roof curbs in eight- and fourteen-inch
heights. Roof curbs for transitioning from
York Sunline™ footprint to the BP Series
footprint are also available.
(field-installed accessory)
Base rails w/forklift slots (3 sides)
and lifting holes)
Side entry
power and control
wiring knockouts
Tool-less door
latch
FIGURE 4 -
PREDATOR® COMPONENT LOCATION
TABLE 1: UNIT TEMPERATURE LIMITATIONS
Temperature
Min.
Max.
Wet Bulb Temp °F (°C) of Air on Evap Coil
57 (14)
72 (22)
Dry Bulb Temp °F (°C) of Air on Cond Coil
0 (-18)
125 (52)
TABLE 2: UNIT VOLTAGE LIMITATIONS
Power Rating*
Minimum
Maximum
380/415-3-50
342
456
*.
Utilization range “A” in accordance with ARI Standard
110.
1.
Unit is designed for outdoor installation only.
2.
Condenser coils must have an unlimited supply of air.
Where a choice of location is possible, position the unit
on either north or east side of building.
3.
Suitable for mounting on roof curb.
4.
For ground level installation, use a level concrete slab
with a minimum thickness of 4 inches (102 mm). The
length and width should be at least 6 inches (152 mm)
greater than the unit base rails. Do not tie slab to the
building foundation.
5.
Roof structures must be able to support the weight of the
unit and its options/accessories. Unit must be installed
on a solid, level roof curb or appropriate angle iron
frame.
6.
Maintain level tolerance to 1/2” (13 mm) across the entire
width and length of unit.
LOCATION
Use the following guidelines to select a suitable location for
these units:
Unitary Products Group
9
66307-YIM-B-0606
RIGGING AND HANDLING
TABLE 3: UNIT WEIGHTS
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.
Model
Shipping Weight lb. (kg)
BP090
1108 (503)
1103 (500)
BP120
1212 (550)
1207 (547)
Econ.
85 (39)
84 (38)
w/ PE
150 (68)
148 (67)
49 (22)
49 (22)
Elec.
Heat*
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.
Operating Weight lb. (kg)
*.
54kW heater.
TABLE 4: 4 POINT LOAD WEIGHT
Location lbs. (kg)
Model
Before lifting, make sure the unit weight is distributed equally on the rigging cables so it will lift evenly.
A
B
C
D
BP090
242 (109)
207 (94)
301 (137)
353 (160)
BP120
265 (120)
226 (103)
330 (150)
386 (175)
TABLE 5: 6 POINT LOAD WEIGHT
Location lbs. (kg)
Units may be moved or lifted with a forklift. Slotted openings
in the base rails are provided for this purpose.
Model
LENGTH OF FORKS MUST BE A MINIMUM OF 60 INCHES
(1524 mm).
A
B
C
D
E
F
BP090
166
(75)
149
(68)
134
(61)
196
(89)
217
(98)
242
(110)
BP120
181
(82)
163
(80)
147
(67)
214
(97)
237
(108)
264
(120)
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.
F R O N T
L E F T
B
A
D
C
E
F
FIGURE 6 -
L E F T
F R O N T
B
C
N O T E : ( x x x ) in d ic a te s
d im e n s io n s in
m illim e te r s
A
4 1 "
(1 0 4 0 )
D
FIGURE 5 -
10
UNIT 4 POINT LOAD
UNIT 6 POINT LOAD
L E F T
FIGURE 7 -
2 4 "
(6 1 0 )
F R O N T
UNIT CENTER OF GRAVITY
Unitary Products Group
66307-YIM-B-0606
CLEARANCES
All units require particular clearances for proper operation
and service. Refer to Table 6 for clearances required for 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.
3 0 -1 1 /3 2
(7 7 0 )
5 0 -3 /4
(1 2 9 0 )
P o
E n
Ø 2
(6
C o n tro l
E n try
Ø 7 /8
(2 2 )
w e r
try
-1 /2
5 )
4 -1 /4
(1 1 0 )
P o
E n
Ø 2
(6
L E F T
5 9
(1 5 0 0 )
3 0 -3 /1 6
(7 6 5 )
2 4 -3 /1 6
(6 1 5 )
1 7 -3 /1 6
(4 3 5 )
C o n v
P
O
E
Ø
w e r
try
-1 /2
5 )
e n ie n c e
o w e r
u tle t
n try
7 /8
(2 2 )
6 -3 /1 6
(1 5 5 )
2 7
(6 8 5 )
F R O N T
F o r D ra
D im e n s
S e e D e
8 9
(2 2 6 0
in
io n s
ta il B
F o r B a s e r a il
D im e n s io n s
S e e D e ta il A
)
N O T E : ( x x x ) in d ic a te s d im e n s io n s
g iv e n in m illim e te r s
FIGURE 8 -
UNIT DIMENSIONS
TABLE 6: UNIT CLEARANCES *
Top†
72 (1830)
Front
Rear‡
12 (305)
36 (915)
Left
36 (915)
36 (915)
Bottom**
0 (0)
*.
In inches and millimeters, in.(mm).
†.
Units must be installed outdoors. Overhanging structure or
shrubs should not obstruct condenser air discharge outlet.
‡.
To remove the slide-out drain pan, a rear clearance of 60”
(1525 mm) is required. If space is unavailable, the drain pan
can be removed through the front by separating the corner
wall.
**.
Units may be installed on combustible floors.
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.
Unitary Products Group
2 -3 /8
(6 0 )
DETAIL A
Right
3 -3 /4
(9 5 )
3 -9 /1 6
(9 0 )
DETAIL B
5 -3 /8
(1 3 5 )
11
66307-YIM-B-0606
.
32-11/16
(830)
6-13/16
(175)
6-13/16
(175)
NOTE :(XX X )INDICATES DIMEN
S IONS IN
MILLIMETE R
S SUP P LY AIR
RETUR
N
AIR
6-13/16
(175)
LEFT
27-1/2
(700)
18
(455)
24
(610)
21
(535)
19-3/16
(485)
21-3/16 17-3/16
(435)
(540)
7-1/8
(181)
FIGURE 9 -
12
14-23/32
(375)
16-3/8
(415)
18-1/16
(460)
19-5/8
(498)
BottomCondensate FRON T
Location
BottomPower,
Controland
Convenience
OutletWiring
Entry
BOTTOM DUCT OPENINGS (FROM ABOVE)
Unitary Products Group
66307-YIM-B-0606
1 8 -1 /4
(4 6 5 )
2 8 -1 /4
(7 2 0 )
R e tu rn
A ir
S u p p ly
A ir
1 8 -1 /4
(4 6 5 )
P a tc h P la te
F o r S lid e - O u t
D r a in P a n
5 -5 /3 2
(1 3 0 )
1 8 -1 /1 6
(4 6 0 )
2 -3 1 /3 2
(7 5 )
2 8 -1 /4
(7 2 0 )
N O T E : ( X X X ) in d ic a te s m illim e te r s
3 1 -1 1 /1 6
(8 0 5 )
FIGURE 10 - REAR DUCT DIMENSIONS
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.
Unitary Products Group
13
66307-YIM-B-0606
R IG H T
8 0 -5 /8
(2 0 5 0 )
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
(5 1 0 )
S U P P L Y
6
2 0
(5 1 0 ) (1 5 0 )
2 T Y P .
(5 0 )
R E T U R N
3 0
(7 6 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
(1 2 8 5 )
8
1 4
O R
(2 0 5 )
(3 5 5 )
F R O N T
N O T E : (X X X ) IN D IC A T E S
D IM E N S IO N S IN
M IL L IM E T E R S
FIGURE 11 - PREDATOR® ROOF CURB DIMENSIONS
2 T Y P
(5 0 )
5 0 -1 /2
(1 2 8 5 )
2 3
(5 8 5 )
3 0 -1 /2
(7 7 5 )
4
(1 0 0 )
2 6
(6 6 0 )
R E T U R N
8 0 -5 /8
(2 0 5 0 )
S U P P L Y
1 0
(2 5 5 )
7 6 -5 /8
(1 9 4 5 )
F R O N T
5 9 -1 /4
(1 5 0 5 )
9 4
(2 3 9 0 )
6 4 -1 /4
(1 6 3 0 )
R IG H T
FIGURE 12 - SUNLINE™ TO PREDATOR® TRANSITION ROOF CURBS
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.
FIGURE 13 - SIDE PANELS WITH HOLE PLUGS
Note orientation. Panel is “insulation” side up.
14
Unitary Products Group
66307-YIM-B-0606
COMPRESSORS
The compressors are mounted on elastomer insulators. The
mounting bolts have been fully tightened for shipping.
Do not loosen the compressor mounting bolts.
FILTERS
FIGURE 14 - RETURN DOWNFLOW PLENUM WITH
PANEL
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. All units use four (4) 20”x25”x2” filters.
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
CONDENSATE DRAIN
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.
THERMOSTAT WIRING
The thermostat should be located on an inside wall approximately 56 inches above the floor where it will not be subject
to drafts, sun exposure or heat from electrical fixtures or
appliances. Follow the manufacturer's instructions enclosed
with thermostat for general installation procedure. Seven (7)
color-coded, insulated wires should be used to connect the
thermostat to the unit. Refer to Table 7 for control wire sizing
and maximum length.
TABLE 7: CONTROL WIRE SIZES
*.
Wire Size
Maximum Length*
18 AWG
150 Feet (45.72 meters)
From the unit to the thermostat and back to the unit.
POWER AND CONTROL WIRING
3 " M in im u m
(7 6 .2 m m )
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 CSA C22.1, 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 2.
FIGURE 16 - CONDENSATE DRAIN
Unitary Products Group
The internal wiring harnesses furnished with this unit are an
integral part of the design certified unit. Field alteration to
15
66307-YIM-B-0606
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.
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.
A disconnect must be utilized for these units. When installing
a disconnect, refer to Figure 4 for the recommended mounting location.
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.
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.
T H E R M
T E R M
O S T A T
IN A L S
Units are factory wired for the voltage shown on the unit
nameplate. Refer to Electrical Data Tables 8 and 9 to size
power wiring, fuses, and disconnect switch.
Power wiring is brought into the unit through the side of the
unit or the basepan inside the curb.
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
POWER WIRING DETAIL
W
2
1
W
G
2
G
C
C
X 1
X 3
2 4
X
2
V o lt
T r a n s fo r m
e r
O C C
X 4
A 1
The thermostat must provide a “G” signal
when there is a call for “W1.”The unit control
board will energize the indoor blower when
the compressors are energized; however, if
the thermostat calls for “W2” during the antishort-cycle delay, the electric heat (when
installed) will be energized immediately
upon the call for “W2.”
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
NOTE: This unit does not require a heat pump thermostat.
It is designed to work with a standard two-stage
cool, two-stage heat thermostat; however, the thermostat must provide a “G” signal when there is a
call for “W1”.
16
Unitary Products Group
66307-YIM-B-0606
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 E M O T E
M IN P O S
C
R H
The thermostat must provide a “G” signal
when there is a call for “W1.”The unit control
board will energize the indoor blower when
the compressors are energized; however, if
the thermostat calls for “W2” during the antishort-cycle delay, the electric heat (when
installed) will be energized immediately
upon the call for “W2.”
U N IT C O N T R O L
B O A R D
Y 2
R C
X
R
S D
C
FIGURE 18 - FIELD WIRING 24 VOLT THERMOSTAT
TERM
INALBLOC
K TB1
GRO
U
N
D
LUG
FIELD SUPPLIED
DISCONNECT
THRE E PHAS E
POW
ER
SUPP LY
FIGURE 19 - FIELD WIRING DISCONNECT
Unitary Products Group
17
66307-YIM-B-0606
TABLE 8: ELECTRICAL DATA - 7-1/2 TON HP
Compressors
Voltage
RLA
ea
380
415
*.
8.3
8.3
LRA
ea
62
62
OD
Fan
Motors
FLA
ea
1.1
1.1
MCA
Max Fuse
Max Fuse Size
Pwr
with Power
Minimum Circuit
w/Pwr. Exh.*
Size*
Exh
Exhaust
Ampacity
(Amps)
(Amps)
(Amps)
Motor Electric Heater Actual Heater
(Amps)
Model No.
Kw
Amps
1.5 HP
2 HP
1.5 HP
2 HP
1.5 HP
2 HP
1.5 HP
2 HP
1.5 HP
2 HP
FLA
(1.1 kW) (1.5 kW)
(1.1 kW) (1.5 kW) (1.1 kW) (1.5 kW) (1.1 kW) (1.5 kW) (1.1 kW) (1.5 kW)
Supply Air
BLower
Motor FLA
4.3
4.3
5.2
5.2
2.2
2.2
None
-
-
25.2
26.1
27.4
28.3
30
30
35
35
2TP04520950
5.6
8.5
35.8
36.7
38.0
38.9
40
40
40
45
2TP04521850
11.3
17.2
46.6
47.5
48.8
49.7
50
50
50
50
2TP04522450
15.0
22.8
53.7
54.6
55.9
56.8
60
60
60
60
2TP04523650
21.3
32.4
65.6
66.5
67.8
68.7
70
70
70
70
None
-
-
25.2
26.1
27.4
28.3
30
30
35
35
2TP04520950
6.7
9.3
36.8
37.7
39.0
39.9
40
40
40
45
2TP04521850
13.5
18.8
48.7
49.6
50.9
51.8
50
50
60
60
2TP04522450
17.9
24.9
56.3
57.2
58.5
59.4
60
60
60
60
2TP04523650
25.4
35.3
69.3
70.2
71.5
72.4
70
80
80
80
Maximum HACR breaker of the same amp size is acceptable.
TABLE 9: ELECTRICAL DATA - 10 TON HP
Compressors
Voltage
RLA
ea
380
415
*.
†.
18
8.1
8.1
LRA
ea
73.0
73.0
OD
Fan
Motors
FLA
ea
1.1
1.1
Supply Air
BLower
Motor FLA
2 HP
(1.5 kW)
5.2
5.2
4HP
(3 kW)
7.5
7.5
MCA
Max Fuse
Pwr
with Power
Minimum Circuit
Size*
Exh
Exhaust
Ampacity (Amps)
Electric
Heater
Actual
Heater
(Amps)
Motor
(Amps)
Model No.
Kw
Amps
2 HP
4 HP
2 HP
4 HP
2 HP
4 HP
FLA
(1.5 kW) (3 kW) (1.5 kW) (3 kW) (1.5 kW) (3 kW)
2.2
2.2
Max Fuse Size
w/Pwr. Exh.*
(Amps)
2 HP
(1.5 kW)
4 HP
(3 kW)
None
--
--
25.6
27.9
27.8
30.1
30
35
35
35
2TP04521850
11.3
17.2
47.1
49.4
49.3
51.6
50
50
50
60
2TP04522450
15.0
22.8
54.1
56.4
56.3
58.6
60
60
60
60
2TP04523650
21.3
32.4
66.1
68.4
68.3
70.6
70
70
70
80
2HP04535450†
33.8
51.4
70.7
73.6
73.4
76.3
80
80
80
80
None
--
--
25.6
27.9
27.8
30.1
30
35
35
35
2TP04521850
13.5
18.8
49.1
51.4
51.3
53.6
50
60
60
60
2TP04522450
17.9
24.9
56.8
59.1
59.0
61.3
60
60
60
70
2TP04523650
25.4
35.3
69.8
72.1
72.0
74.3
70
80
80
80
2HP04535450†
40.4
56.2
76.8
79.6
79.5
82.4
80
80
80
90
Maximum HACR breaker of the same amp size is acceptable.
Only 25.4 kW of electric heat can be simultaneously energized with the mechanical heating. The full 40.4 kW operates only if both compressors are locked out.
Unitary Products Group
66307-YIM-B-0606
TABLE 10: PHYSICAL DATA
Models
Component
090
120
Blower, Centrifugal Dia. X Wd. in. (Dia. X Wd. mm)
15 x 15 (381 x 381)
15 x 15 (381 x 381)
Motor, Standard HP (kW)
1-1/2 (1.1)
2 (1.5)
Motor, Optional HP (kW)
2 (1.5)
4 (3)
Rows
3
4
Fins per Inch (2.54 cm.)
15
15
Height in. (mm)
40 (1020)
40 (1020)
Face Area ft.2 each (m2)
13.2 (1.23)
13.2 (1.23)
Propeller Dia. in., each (mm)
24 (610)
24 (610)
Motor HP, each (kW)
3/4 (.56)
3/4 (.56)
CFM, Nominal (each)
4000
4000
Rows (each)
1
2
Fins per Inch (2.54 cm)
20
20
Height in., each (mm)
44 (1120)
44 (1120)
Face Area ft.2 each (mm)
14.5 (1.35)
14.5 (1.35)
System 1 lb./oz. (kg)
9 lbs. 4 oz. (4.20)
15 lbs. 4 oz. (6.92)
System 2 lb./oz. (kg)
9 lbs. 0 oz. (4.06)
15 lbs. 0 oz. (6.80)
Quantity
2
2
Type
Recip
Scroll
Size Wd. x Ht. x Thickness in. (Wd. x Ht x Thickness
mm)
25x20x2
(635 x 508 x 51)
25x20x2
(635 x 508 x 51)
Number Per Unit
4
4
Evaporator
Blower
Evaporator Coil
Condenser Fan
(2 per Unit)
Condenser Coil
(2 per unit)
Refrigerant
Charge
Compressors
Air Filters
FACTORY INSTALLED OPTIONS/
FIELD INSTALLED ACCESSORIES
ELECTRIC HEAT ACCESSORY
Electric heaters are available as 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.
Unitary Products Group
ELECTRIC HEAT OPTION
The factory-installed heaters are wired for single point power
supply. Power supply need only be brought into the single
point terminal block.
These CSA approved heaters are located within the central
compartment of the unit with the heater elements extending
into the supply air chamber.
Fuses are supplied, where required, by the factory. Some kW
sizes require fuses and other do not. Refer to Table 11 for
minimum CFM limitations and to Tables 8 and 9 for electrical
data.
19
66307-YIM-B-0606
TABLE 11: ELECTRIC HEAT MINIMUM SUPPLY AIR
IMPERIAL
HEATER
VOLTAGE
kW
UNIT MODEL SIZE, NOMINAL TONS
7.5
10
MINIMUM SUPPLY AIR CFM
9
2250
N/A
18
2250
3000
2250
3000
36
2250
3000
54
N/A
3000
380/415
24
METRIC
HEATER
VOLTAGE
10
MINIMUM SUPPLY AIR M3S
9
1.06
N/A
18
1.06
1.42
1.06
1.42
36
1.06
1.42
54
N/A
1.42
24
380/415
There are two field installed Power Exhaust accessories:
1.
Down Flow application.
2.
Horizontal Flow application that requires the purchase of
a barometric relief hood.
RAIN HOOD
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.
UNIT MODEL SIZE, NOMINAL TONS
7.5
kW
The Power Exhaust factory installed option is for Down Flow
application only.
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.
Extreme care must be exercised in turning all set
point, maximum and minimum damper positioning
adjustment screws to prevent twisting them off.
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.
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”.
•
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.
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.
There are two Economizer options:
1.
Down Flow application with barometric relief hood standard.
ENTHALPY SET POINT ADJUSTMENT
2.
Horizontal Flow application that requires the purchase of
a barometric relief hood.
The enthalpy set point may now be set by selecting the
desired set point shown in the Enthalpy Set Point Adjustment
Figure 20. Adjust as follows:
POWER EXHAUST
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.
20
•
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 20.
Unitary Products Group
66307-YIM-B-0606
•
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)
•
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
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.
INDOOR AIR QUALITY AQ
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.
•
Optional CO2 Space Sensor Kit Part # 2AQ04700324
•
Optional CO2 Sensor Kit Part # 2AQ04700424
Replace the top rear access panel on the unit.
Indoor Air Quality (indoor sensor input): Terminal AQ accepts
a +2 to +10 Vdc signal with respect to the (AQ1) terminal.
FIGURE 20 - ENTHALPY SET POINT CHART
Unitary Products Group
21
66307-YIM-B-0606
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
AQ1
AQ
IAQ
SO
IAQ
Min
24
Vac
COM
+
IAQ
Max
Indoor Air Quality
LED
TR1
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 21 - HONEYWELL ECONOMIZER CONTROL W7212
PHASING
BLOWER ROTATION
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 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). Units with scroll compressors
have a phase monitor as standard equipment. This phase
monitor will prevent unit operation under misphased conditions by breaking the 24 volt power.
Check for proper supply air blower rotation. If the blower is
rotating backwards, the line voltage at the unit point of power
connection is misphased (See ‘PHASING’).
TABLE 12: SUPPLY AIR LIMITATIONS
Unit Size
Minimum CFM
3/sec.)
(m
Maximum CFM
(m3/sec.)
090
2250 (1)
3750 (1.7)
120
3000 (1.4)
5000 (2.3)
BELT TENSION
The tension on the belt should be adjusted as shown in
Figure 22.
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.
22
Unitary Products Group
66307-YIM-B-0606
A
Procedure for adjusting belt tension:
1. Loosen six nuts (top and bottom) A.
2. Adjust by turning (B).
3. Never loosen nuts (C).
A
C*
* NEVER LOOSEN
4. 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:
A
B
SPAN LENGTH
DEFL. FORCE
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).
FIGURE 22 - BELT ADJUSTMENT
Unitary Products Group
23
66307-YIM-B-0606
TABLE 13: BLOWER PERFORMANCE 7-1/2 TON STANDARD MOTOR - SIDE DUCT (IMPERIAL)
Turns Open
ESP
(iwg)
0
1
2
3
4
5
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
0.2
-
-
-
-
-
-
-
-
-
-
-
-
3698
1382
1.48
3527
1249
1.34
0.4
-
-
-
-
-
-
-
-
-
3591
1424
1.53
3288
1242
1.33
3093
1120
1.20
0.6
-
-
-
-
-
-
3430
1451
1.56
3183
1276
1.37
2819
1104
1.18
2550
977
1.05
0.8
-
-
-
3312
1490
1.60
2975
1287
1.38
2593
1101
1.18
-
-
-
-
-
-
1.0
3086
1480
1.59
2679
1269
1.36
2154
1059
1.14
-
-
-
-
-
-
-
-
-
TABLE 14: BLOWER PERFORMANCE 7-1/2 TON STANDARD MOTOR - SIDE DUCT (METRIC)
Turns Open
ESP
(Pa)
0
1
2
3
4
5
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
50
-
-
-
-
-
-
-
-
-
-
-
-
1.75
1.38
1.11
1.66
1.25
1.00
100
-
-
-
-
-
-
-
-
-
1.69
1.42
1.14
1.55
1.24
0.99
1.46
1.12
0.90
149
-
-
-
-
-
-
1.62
1.45
1.16
1.50
1.28
1.02
1.33
1.10
0.88
1.20
0.98
0.78
199
-
-
-
1.56
1.49
1.19
1.40
1.29
1.03
1.22
1.10
0.88
-
-
-
-
-
-
249
1.46
1.48
1.18
1.26
1.27
1.02
1.02
1.06
0.85
-
-
-
-
-
-
-
-
-
TABLE 15: BLOWER PERFORMANCE 7-1/2 TON OPTIONAL MOTOR - SIDE DUCT (IMPERIAL)
Turns Open
ESP
(iwg)
0
1
2
3
4
5
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
0.4
-
-
-
-
-
-
-
-
-
-
-
-
4052
1830
1.96
3715
1559
1.67
0.6
-
-
-
-
-
-
-
-
-
4016
1933
2.07
3677
1667
1.79
3342
1422
1.52
0.8
-
-
-
-
-
-
3991
2032
2.18
3639
1745
1.87
3270
1504
1.61
2858
1261
1.35
1.0
-
-
-
3953
2151
2.31
3576
1833
1.97
3191
1573
1.69
2702
1307
1.40
-
-
-
1.2
3802
2195
2.35
3544
1941
2.08
3040
1626
1.74
2327
1290
1.38
-
-
-
-
-
-
1.4
3379
2001
2.15
2913
1674
1.80
-
-
-
-
-
-
-
-
-
-
-
-
1.6
2552
1642
1.76
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
24
Unitary Products Group
66307-YIM-B-0606
TABLE 16: BLOWER PERFORMANCE 7-1/2 TON OPTIONAL MOTOR - SIDE DUCT (METRIC)
Turns Open
ESP
(Pa)
0
1
2
3
4
5
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
100
-
-
-
-
-
-
-
-
-
-
-
-
1.91
1.83
1.46
1.75
1.56
1.25
149
-
-
-
-
-
-
-
-
-
1.90
1.93
1.55
1.74
1.67
1.33
1.58
1.42
1.14
199
-
-
-
-
-
-
1.88
2.03
1.63
1.72
1.75
1.40
1.54
1.50
1.20
1.35
1.26
1.01
249
-
-
-
1.87
2.15
1.72
1.69
1.83
1.47
1.51
1.57
1.26
1.28
1.31
1.05
-
-
-
299
1.79
2.20
1.76
1.67
1.94
1.55
1.43
1.63
1.30
1.10
1.29
1.03
-
-
-
-
-
-
349
1.59
2.00
1.60
1.37
1.67
1.34
-
-
-
-
-
-
-
-
-
-
-
-
399
1.20
1.64
1.31
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
TABLE 17: BLOWER PERFORMANCE 10 TON STANDARD MOTOR - SIDE DUCT (IMPERIAL)
Turns Open
ESP
(iwg)
0
1
2
3
4
5
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
0.4
4820
2675
2.87
4582
2362
2.53
4319
2080
2.23
4086
1842
1.98
3863
1648
1.77
3590
1430
1.53
0.6
4522
2496
2.68
4307
2215
2.38
4025
1941
2.08
3713
1678
1.80
3464
1499
1.61
3149
1291
1.38
0.8
4223
2332
2.50
3973
2062
2.21
3656
1783
1.91
3363
1550
1.66
3026
1350
1.45
-
-
-
1.0
3913
2174
2.33
3679
1923
2.06
3262
1619
1.74
2721
1330
1.43
-
-
-
-
-
-
1.2
3521
1978
2.12
3104
1693
1.82
-
-
-
-
-
-
-
-
-
-
-
-
1.4
2790
1660
1.78
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
TABLE 18: BLOWER PERFORMANCE 10 TON STANDARD MOTOR - SIDE DUCT (METRIC)
Turns Open
ESP
(Pa)
0
1
2
3
4
5
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
100
2.27
2.68
2.14
2.16
2.36
1.89
2.04
2.08
1.66
1.93
1.84
1.47
1.82
1.65
1.32
1.69
1.43
1.14
149
2.13
2.50
2.00
2.03
2.22
1.77
1.90
1.94
1.55
1.75
1.68
1.34
1.63
1.50
1.20
1.49
1.29
1.03
199
1.99
2.33
1.87
1.88
2.06
1.65
1.73
1.78
1.43
1.59
1.55
1.24
1.43
1.35
1.08
-
-
-
249
1.85
2.17
1.74
1.74
1.92
1.54
1.54
1.62
1.30
1.28
1.33
1.06
-
-
-
-
-
-
299
1.66
1.98
1.58
1.46
1.69
1.35
-
-
-
-
-
-
-
-
-
-
-
-
349
1.32
1.66
1.33
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Unitary Products Group
25
66307-YIM-B-0606
TABLE 19: BLOWER PERFORMANCE 10 TON OPTIONAL MOTOR - SIDE DUCT (IMPERIAL)
Turns Open
ESP
(iwg)
0
1
2
3
4
5
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
0.4
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
4960
2495
2.68
0.6
-
-
-
-
-
-
-
-
-
-
-
-
5091
2745
2.94
4646
2314
2.48
0.8
-
-
-
-
-
-
-
-
-
5078
2937
3.15
4839
2584
2.77
4347
2153
2.31
1.0
-
-
-
-
-
-
5075
3117
3.34
4767
2730
2.93
4487
2377
2.55
3946
1942
2.08
1.2
-
-
-
5068
3308
3.55
4742
2881
3.09
4427
2513
2.69
4108
2159
2.32
3501
1723
1.85
1.4
5079
3595
3.86
4787
3105
3.33
4452
2713
2.91
4012
2259
2.42
3665
1926
2.07
-
-
-
1.6
4739
3316
3.56
4482
2892
3.10
4098
2474
2.65
3543
2006
2.15
3057
1642
1.76
-
-
-
1.8
4461
3111
3.34
4070
2621
2.81
3552
2160
2.32
-
-
-
-
-
-
-
-
-
2.0
3997
2782
2.98
3400
2219
2.38
-
-
-
-
-
-
-
-
-
-
-
-
2.2
3496
2480
2.66
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
TABLE 20: BLOWER PERFORMANCE 10 TON OPTIONAL MOTOR - SIDE DUCT (METRIC)
Turns Open
ESP
(Pa)
0
1
2
3
4
5
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
100
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
2.34
2.50
2.00
149
-
-
-
-
-
-
-
-
-
-
-
-
2.40
2.75
2.20
2.19
2.31
1.85
199
-
-
-
-
-
-
-
-
-
2.40
2.94
2.35
2.28
2.58
2.07
2.05
2.15
1.72
249
-
-
-
-
-
-
2.40
3.12
2.49
2.25
2.73
2.18
2.12
2.38
1.90
1.86
1.94
1.55
299
-
-
-
2.39
3.31
2.65
2.24
2.88
2.30
2.09
2.51
2.01
1.94
2.16
1.73
1.65
1.72
1.38
349
2.40
3.60
2.88
2.26
3.11
2.48
2.10
2.71
2.17
1.89
2.26
1.81
1.73
1.93
1.54
-
-
-
399
2.24
3.32
2.65
2.12
2.89
2.31
1.93
2.47
1.98
1.67
2.01
1.60
1.44
1.64
1.31
-
-
-
448
2.11
3.11
2.49
1.92
2.62
2.10
1.68
2.16
1.73
-
-
-
-
-
-
-
-
-
498
1.89
2.78
2.23
1.60
2.22
1.78
-
-
-
-
-
-
-
-
-
-
-
-
548
1.65
2.48
1.98
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
26
Unitary Products Group
66307-YIM-B-0606
TABLE 21: BLOWER PERFORMANCE 7-1/2 TON STANDARD MOTOR - DOWNSHOT (IMPERIAL)
Turns Open
ESP
(iwg)
0
1
2
3
4
5
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
0.2
-
-
-
3838
1772
1.90
3530
1491
1.60
3487
1385
1.49
3260
1234
1.32
3091
1119
1.20
0.4
3299
1485
1.592
3589
1670
1.79
3361
1425
1.53
3173
1275
1.37
2846
1111
1.19
2667
1006
1.08
0.6
3355
1506
1.62
3240
1535
1.65
3012
1301
1.40
2707
1131
1.21
2333
980
1.05
2151
887
0.95
0.8
3095
1409
1.51
2791
1380
1.48
2484
1141
1.22
2088
978
1.05
-
-
-
-
-
-
1.0
2519
1219
1.31
2241
1216
1.30
-
-
-
-
-
-
-
-
-
-
-
-
TABLE 22: BLOWER PERFORMANCE 7-1/2 TON STANDARD MOTOR - DOWNSHOT (METRIC)
Turns Open
ESP
(Pa)
0
1
2
3
4
5
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
50
-
-
-
1.81
1.77
1.42
1.67
1.49
1.19
1.65
1.39
1.11
1.54
1.23
0.99
1.46
1.12
0.90
100
1.56
1.48
1.19
1.69
1.67
1.34
1.59
1.43
1.14
1.50
1.27
1.02
1.34
1.11
0.89
1.26
1.01
0.80
149
1.58
1.51
1.21
1.53
1.54
1.23
1.42
1.30
1.04
1.28
1.13
0.90
1.10
0.98
0.78
1.01
0.89
0.71
199
1.46
1.41
1.13
1.32
1.38
1.10
1.17
1.14
0.91
0.99
0.98
0.78
-
-
-
-
-
-
249
1.19
1.22
0.98
1.06
1.22
0.97
-
-
-
-
-
-
-
-
-
-
-
-
TABLE 23: BLOWER PERFORMANCE 7-1/2 TON OPTIONAL MOTOR - DOWNSHOT (IMPERIAL)
Turns Open
ESP
(iwg)
0
1
2
3
4
5
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
0.2
-
-
-
-
-
-
-
-
-
-
-
-
3884
1754
1.88
3611
1520
1.63
0.4
-
-
-
-
-
-
-
-
-
3837
1843
1.98
3576
1624
1.74
3282
1400
1.50
0.6
-
-
-
4054
2201
2.36
3766
1926
2.07
3491
1691
1.81
3183
1473
1.58
2862
1263
1.35
0.8
-
-
-
3735
2037
2.18
3412
1769
1.90
3083
1530
1.64
2707
1311
1.41
2352
1119
1.20
1.0
3626
2112
2.27
3362
1861
2.00
3014
1611
1.73
2614
1372
1.47
2146
1151
1.23
-
-
-
1.2
3227
1931
2.07
2938
1682
1.80
2572
1457
1.56
2082
1227
1.32
-
-
-
-
-
-
1.4
2778
1733
1.86
2461
1506
1.61
-
-
-
-
-
-
-
-
-
-
-
-
1.6
2279
1522
1.63
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Unitary Products Group
27
66307-YIM-B-0606
TABLE 24: BLOWER PERFORMANCE 7-1/2 TON OPTIONAL MOTOR - DOWNSHOT (METRIC)
Turns Open
ESP
(Pa)
0
1
2
3
4
5
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
50
-
-
-
-
-
-
-
-
-
-
-
-
1.83
1.75
1.40
1.70
1.52
1.22
100
-
-
-
-
-
-
-
-
-
1.81
1.84
1.47
1.69
1.62
1.30
1.55
1.40
1.12
149
-
-
-
1.91
2.20
1.76
1.78
1.93
1.54
1.65
1.69
1.35
1.50
1.47
1.18
1.35
1.26
1.01
199
-
-
-
1.76
2.04
1.63
1.61
1.77
1.42
1.46
1.53
1.22
1.28
1.31
1.05
1.11
1.12
0.90
249
1.71
2.11
1.69
1.59
1.86
1.49
1.42
1.61
1.29
1.23
1.37
1.10
1.01
1.15
0.92
-
-
-
299
1.52
1.93
1.54
1.39
1.68
1.35
1.21
1.46
1.17
0.98
1.23
0.98
-
-
-
-
-
-
349
1.31
1.73
1.39
1.16
1.51
1.20
-
-
-
-
-
-
-
-
-
-
-
-
399
1.08
1.52
1.22
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
TABLE 25: BLOWER PERFORMANCE 10 TON STANDARD MOTOR - DOWNSHOT (IMPERIAL)
Turns Open
ESP
(iwg)
0
1
2
3
4
5
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
0.2
4543
2511
2.69
4362
2250
2.41
4139
1996
2.14
3911
1766
1.89
3719
1594
1.71
3518
1407
1.51
0.4
4311
2381
2.55
4115
2127
2.28
3862
1871
2.01
3611
1644
1.76
3386
1471
1.58
3153
1293
1.39
0.6
4032
2232
2.39
3804
1982
2.13
3508
1720
1.84
3246
1506
1.61
2971
1332
1.43
-
-
-
0.8
3706
2068
2.22
3428
1818
1.95
3078
1548
1.66
-
-
-
-
-
-
-
-
-
1.0
3333
1892
2.03
2989
1644
1.76
-
-
-
-
-
-
-
-
-
-
-
-
1.2
2914
1711
1.83
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
TABLE 26: BLOWER PERFORMANCE 10 TON STANDARD MOTOR - DOWNSHOT (METRIC)
Turns Open
ESP
(Pa)
0
1
2
3
4
5
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
50
2.14
2.51
2.01
2.06
2.25
1.80
1.95
2.00
1.60
1.85
1.77
1.41
1.75
1.59
1.27
1.66
1.41
1.13
100
2.03
2.38
1.91
1.94
2.13
1.70
1.82
1.87
1.50
1.70
1.64
1.31
1.60
1.47
1.18
1.49
1.29
1.03
149
1.90
2.23
1.79
1.80
1.98
1.59
1.66
1.72
1.38
1.53
1.51
1.20
1.40
1.33
1.07
-
-
-
199
1.75
2.07
1.65
1.62
1.82
1.45
1.45
1.55
1.24
-
-
-
-
-
-
-
-
-
249
1.57
1.89
1.51
1.41
1.64
1.32
-
-
-
-
-
-
-
-
-
-
-
-
299
1.38
1.71
1.37
-
-
-
-
-
-
-
-
-
-
-
-
-
-
28
Unitary Products Group
66307-YIM-B-0606
TABLE 27: BLOWER PERFORMANCE 10 TON OPTIONAL MOTOR - DOWNSHOT (IMPERIAL)
Turns Open
ESP
(iwg)
0
1
2
3
4
5
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
CFM
Watts
BHP
0.2
-
-
-
-
-
-
-
-
-
-
-
-
4966
2666
2.86
4605
2290
2.46
0.4
-
-
-
-
-
-
-
-
-
4919
2473
2.65
4721
2515
2.70
4344
2145
2.30
0.6
-
-
-
-
-
-
4929
3022
3.24
4665
2324
2.49
4450
2353
2.52
4048
1991
2.13
0.8
-
-
-
4908
3197
3.43
4668
2841
3.05
4391
2171
2.33
4151
2183
2.34
3717
1829
1.96
1.0
4915
3456
3.71
4651
3013
3.23
4388
2656
2.85
4096
2015
2.16
3825
2008
2.15
3352
1664
1.78
1.2
4653
3253
3.49
4377
2823
3.03
4089
2467
2.65
3779
1858
1.99
3471
1830
1.96
2951
1499
1.61
1.4
4372
3046
3.27
4087
2631
2.82
3771
2277
2.44
3442
1703
1.83
3090
1652
1.77
-
-
-
1.6
4070
2837
3.04
3780
2437
2.61
3434
2089
2.24
3084
1552
1.66
-
-
-
-
-
-
1.8
3748
2629
2.82
3455
2243
2.41
3078
1904
2.04
-
-
-
-
-
-
-
-
-
2.0
3406
2425
2.60
3114
2051
2.20
-
-
-
-
-
-
-
-
-
-
-
-
2.2
3044
2228
2.39
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
TABLE 28: BLOWER PERFORMANCE 10 TON OPTIONAL MOTOR - DOWNSHOT (METRIC)
Turns Open
ES
P
(Pa)
0
1
2
3
4
5
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
m3/s
In
(kW)
Out
(kW)
50
-
-
-
-
-
-
-
-
-
-
-
-
2.34
2.67
2.13
2.17
2.29
1.83
100
-
-
-
-
-
-
-
-
-
2.32
2.47
1.98
2.23
2.51
2.01
2.05
2.15
1.72
149
-
-
-
-
-
-
2.33
3.02
2.42
2.20
2.32
1.86
2.10
2.35
1.88
1.91
1.99
1.59
199
-
-
-
2.32
3.20
2.56
2.20
2.84
2.27
2.07
2.17
1.74
1.96
2.18
1.75
1.75
1.83
1.46
249
2.32
3.46
2.76
2.20
3.01
2.41
2.07
2.66
2.12
1.93
2.01
1.61
1.81
2.01
1.61
1.58
1.66
1.33
299
2.20
3.25
2.60
2.07
2.82
2.26
1.93
2.47
1.97
1.78
1.86
1.49
1.64
1.83
1.46
1.39
1.50
1.20
349
2.06
3.05
2.44
1.93
2.63
2.10
1.78
2.28
1.82
1.62
1.70
1.36
1.46
1.65
1.32
-
-
-
399
1.92
2.84
2.27
1.78
2.44
1.95
1.62
2.09
1.67
1.46
1.55
1.24
-
-
-
-
-
-
448
1.77
2.63
2.10
1.63
2.24
1.79
1.45
1.90
1.52
-
-
-
-
-
-
-
-
-
498
1.61
2.43
1.94
1.47
2.05
1.64
-
-
-
-
-
-
-
-
-
-
-
-
548
1.44
2.23
1.78
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
TABLE 29: INDOOR BLOWER SPECIFICATIONS
MODEL
BP090
BP120
MOTOR
MOTOR SHEAVE
BLOWER SHEAVE
BELT
HP
RPM
Eff.
SF
Frame
Datum Dia. (in.)
Bore (in.)
Model
Datum Dia. (in.)
Bore (in.)
Model
1-1/2
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
A53
2
1725
80%
1.15
56
3.4 - 4.4
7/8
1VM50
7
1
AK74
A54
4
1725
80%
1.15
184T
4.3-5.3
1-1/8
1VP56
6.2
1
BK72
BX56
Unitary Products Group
29
66307-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
METHOD TWO
1.
Remove the dot plugs from the duct panel (for location of
the dot plugs see Figure 10).
1.
2.
Insert eight-inches of 1/4 inch metal tubing into the airflow on both sides of the indoor coil.
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 holes drilled in step one, insert eight inches of
1/4 inch metal tubing into the airflow of both return and
supply air ducts of the unit.
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.
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.
The CFM through the unit can be determined from the
pressure drop indicated by the manometer by referring to
Figure 23. In order to obtain an accurate measurement,
be certain that the air filters are clean.
Select the correct blower performance table for the unit
from Tables 13 - 28. Tables are presented for horizontal
and downflow configurations.
6.
To adjust Measured CFM to Required CFM, see ’SUPPLY AIR DRIVE ADJUSTMENT’.
Determine the unit Measured CFM from the Blower Performance Table by utilizing the measured 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 readings have 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.
5.
6.
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.
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.
30
Unitary Products Group
66307-YIM-B-0606
Predator 50 Hz Heat Pump Units
Indoor Coil Pressure Drop vs. Airflow
0.7
0.6
0.5
0.4
7.5T 50 Hz HP
10T 50 Hz HP
0.3
0.2
0.1
0
2000
2500
3000
3500
4000
4500
5000
5500
Airflow (CFM)
FIGURE 23 - DRY COIL DELTA P
SUPPLY AIR DRIVE ADJUSTMENT
EXAMPLE
A 12.5 ton unit was selected to deliver 4,000 CFM with a 3
HP motor, but the unit is delivering 3,800 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.
Use the equation to determine the required DD for the new
motor sheave,
CFM
( 4,000
3,800 CFM ) • 4.0 In.
= 4.21 In.
Use Table 32 to locate the DD nearest to 4.21 in. Close the
sheave to 1 turn open.
New BHP
3
= (Speed increase) • BHP at 3,800 CFM
3
= (Speed increase) • Original BHP
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:
= New BHP
New motor Amps
3
Required 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.
Unitary Products Group
= (Speed increase) • Amps at 3,800 CFM
3
= (Speed increase) • Original Amps
= New Amps
31
66307-YIM-B-0606
TABLE 30: ADDITIONAL STATIC RESISTANCE - IMPERIAL
Electric Heat KW†
CFM
Cooling Only*
Economizer† ‡
9
18
24
36
54
2300
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
5300
0.42
0.06
0.35
0.37
0.41
0.43
0.49
*.
Add these resistance values to the available static resistance in the respective Blower Performance Tables.
†.
Deduct these resistance values from the available external static pressure shown in the respective Blower Performance Table.
‡.
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 31: ADDITIONAL STATIC RESISTANCE - METRIC
32
M3 S
Cooling Only*
Economizer† ‡
1.08
19.9
1.18
22.4
1.27
Electric Heat KW†
9
18
24
36
54
5.0
17.4
19.9
22.4
24.8
32.3
5.0
19.9
22.4
24.8
27.3
34.8
27.3
7.5
22.4
24.8
29.8
32.3
39.7
1.36
29.8
7.5
24.8
27.3
32.3
34.8
44.7
1.46
34.8
7.5
29.8
32.3
37.3
39.7
49.7
1.55
39.7
7.5
32.3
34.8
42.2
44.7
54.6
1.65
44.7
9.9
37.3
39.7
47.2
49.7
59.6
1.74
49.7
9.9
42.2
44.7
52.2
49.7
64.6
1.83
57.1
9.9
47.2
49.7
56.1
59.6
69.5
1.93
62.1
9.9
52.2
54.6
62.1
64.6
77.0
2.02
69.5
12.4
57.1
59.6
69.5
72.0
88.4
2.12
74.5
12.4
62.1
64.6
74.5
77.0
91.9
2.21
82.0
12.4
69.5
72.0
82.0
84.4
99.3
2.30
89.4
12.4
74.5
77.0
86.9
91.9
106.8
2.40
96.9
14.9
82.0
84.4
94.4
99.3
114.2
2.49
104.3
14.9
86.9
91.9
101.8
106.8
121.7
*.
Add these resistance values to the available static resistance in the respective Blower Performance Tables.
†.
Deduct these resistance values from the available external static pressure shown in the respective Blower Performance Table.
‡.
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
66307-YIM-B-0606
INTERMITTENT BLOWER
TABLE 32: MOTOR SHEAVE DATUM
1VM50x7/8
(1-1/2 & 2 HP Motor)
1VP56x1-1/8
(4 HP Motor)
Turns Open
Datum Dia.
in. (mm)
Turns Open
Datum Dia.
in. (mm)
0
4.4 (111.7)
1
5.3 (134.6)
1/2
4.3 (109.2)
1-1/2
5.2 (132)
1
4.2 (106.6)
2
5.1 (129.5)
1-1/2
4.1 (104.1)
2-1/2
5.0 (127)
2
4.0 (101.6)
3
4.9 (124.4)
2-1/2
3.9 (99)
3-1/2
4.8 (121.9)
3
3.8 (96.5)
4
4.7 (119.3)
3-1/2
3.7 (94)
4-1/2
4.6 (116.8)
4
3.6 (91.4)
5
4.5 (114.3)
4-1/2
3.5 (88.9)
5-1/2
4.4 (111.7)
5
3.4 (86.3)
6
4.3 (109.2)
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 heating, the thermostat makes a circuit between “R” and
“W1” for the first stage heating. The UCB energizes the compressors #1 and #2 and their condenser fans. The “W1” call
also energizes a separate relay (RY1), de-energizing the
reversing valve allowing the unit to run in the heating mode. A
time/temperature control operates the defrost cycle.
The thermostat makes a circuit between “R” and “W2” for the
second stage of heating. The UCB passes the “W2” signal on
to the electric heaters if available. In both cases, when the
“W1” call is sensed, the indoor blower is energized.
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.
Unitary Products Group
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.
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),
33
66307-YIM-B-0606
"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
(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 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,
and the economizer damper goes to the closed position. If
the unit is in continues fan operation the economizer damper
goes to the min. 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 (SINGLE OR DUAL) WITH POWER
EXHAUST This system 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.
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.
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 38). 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 38). 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 38). If the other compressor is inactive, the condenser fans will be de-energized.
COOLING OPERATION ERRORS
LOW AMBIENT COOLING
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.
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
34
Unitary Products Group
66307-YIM-B-0606
and the thermostat is calling for cooling, the UCB will operate
in the low ambient mode.
The ASCD is initiated on unit start-up and on any compressor
reset or lock-out.
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.
FLASH CODES
Low ambient mode always begins with compressor operation. Compressor minimum run time may extend the minutes
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 model).
3.
A low-pressure switch to protect against loss of refrigerant charge, (opens at 7 ± 3 psig and resets at 22 ± 5
psig).
The UCB will initiate a flash code associated with errors
within the system. Refer to UNIT CONTROL BOARD FLASH
CODES Table 38.
RESET
Remove the call for cooling, by raising thermostat setting
higher than the conditioned space temperature. This resets
any pressure or freezestat flash codes.
HEATING SEQUENCE OF OPERATION
When the thermostat calls for the first stage of heating, the
low voltage control circuit is completed between “R” and
“W1”. This 24vac signal is passed through the UCB to the
RY1 Relay. Contacts RY1-1 open, assuring the reversing
valve cannot be energized, except during defrost. Contacts
RY1-2 close, completing the circuit to Y on the defrost control
(DC). After its five minute ASCD timer is satisfied, the DC
closes it’s internal compressor relay contacts, sending a
24vac signal to the MV terminal on the UCB. If its ASCD timer
is satisfied the UCB will energize compressor #1 relay. After a
two second delay, it then energizes compressor #2 relay (if
applicable). Therefore, on a call for heat from W1, both compressors are always energized, unless one or the other is
locked out by the UCB. Also on the call for heat, the DC energizes the M4 contactor which brings on both condenser fans.
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.
A second stage call from the thermostat completes the circuit
between R and W2. This 24vac signal is passed through the
UCB to the defrost control board. If the unit is equipped with
an optional electric heater it would be energized through a set
of normally closed contacts on the defrost board. Take note
that the MV terminal on the UCB is constantly monitored
while there is a demand for heat. If the UCB does not see
24vac at terminal MV after six minutes, it initiates a fault code
9, indicating a heating problem.
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.
As mentioned earlier, the defrost control (DC) utilizes a
time/temperature defrost scheme. The following two conditions must be met before the DC will enter a defrost mode:
COMPRESSOR PROTECTION
1.
The DC must first satisfy its accumulated minimum run
time. This is factory set at 60 minutes, but is field adjustable to 30, 60 or 90 minutes.
2.
Either of the two defrost thermostats (DF1 or DF2) must
be closed. These normally open thermostats are
mounted on the respective liquid lines and are set to
close at 31 degrees (+/-3).
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.
Unitary Products Group
If neither defrost thermostat is closed at the completion of it’s
minimum accumulated run time cycle, the DC initiates
another run time cycle, which it must complete before it looks
35
66307-YIM-B-0606
at the position of the defrost thermostats. This action is
repeated until, at the completion of a run time cycle, one of
the defrost thermostats is found to be closed and the DC
enters defrost mode.
Limit Setting Table 33. 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.
When the DC enters the defrost mode, it’s on-board defrost
relay is powered. This energizes both reversing valves, deenergizes both condenser fan motors and energizes the
unit’s optional electric heater. The DC remains in defrost
mode until either of the following two conditions is met:
TABLE 33: ELECTRIC HEAT LIMIT SETTING
1.
2.
UNIT (TONS
Both of the liquid line thermostats are open. Each is set
to open at 55 degrees (+/- 3).
HEATER
kW
LIMIT SWITCH
OPENS °F
7.5
9
150
7.5,10
18
150
380/415
7.5,10
The maximum defrost run time of 10 minutes is met.
VOLTAGE
24
150
7.5,10
34
150
10
54
140
The DC also contains a set of test pins. Placing a jumper
across these pins will result in the following actions:
FLASH CODES
•
If the ASCD timer is active, it is now by-passed, allowing
the compressor to run.
The UCB will initiate a flash code associated with errors
within the system. Refer to UNIT CONTROL BOARD FLASH
CODES Table 38.
•
If the DC is in a lockout condition, the lockout is reset.
•
If the compressor is running, the DC is forced into defrost
mode. The control will remain in defrost mode for as long
as the jumper is in place. When the jumper is removed,
the control will terminate the defrost mode in the normal
manor as described above.
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
NOTE: The DC has two flashing codes which are only initiated if the two pressure switch terminals are open.
As used in the Predator®, there is a jumper across
the pressure switch terminals. Therefore the field
should never experience a DC lockout mode unless
that jumper is removed or broken.
ELECTRIC HEAT OPERATION ERRORS
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 34 for the required electric
heat anticipator setting.
TEMPERATURE LIMIT
TABLE 34: HEAT PUMP ANTICIPATOR SETPOINTS
If the UCB senses zero volts from the high temperature limit,
the indoor blower motor is immediately energized.
SETTING, AMPS
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 38).
W1
W2
0.13
0.1
START-UP
PRESTART CHECK LIST
SAFETY CONTROLS
After installation has been completed:
The UCB monitors the temperature limit switch of electric
heat units.
1.
Check the electrical supply voltage being supplied. Be
sure that it is the same as listed on the unit nameplate.
The control circuit includes the following safety controls:
2.
Set the room thermostat to the off position.
3.
Turn unit electrical power on.
4.
Set the room thermostat fan switch to on.
5.
Check indoor blower rotation.
LIMIT SWITCH (LS)
This control is located inside the heater compartment and is
set to open at the temperature indicated in the Electric Heat
36
Unitary Products Group
66307-YIM-B-0606
•
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.
NOTE: Prior to initial operation, the crankcase heaters must
be energized at least 8 hours before the system is
put into operation.
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).
4.
The second stage of the thermostat will energize second
stage compressor if needed.
OPERATING INSTRUCTIONS
POST START CHECK LIST
1.
1.
Verify proper system pressures for both circuits.
2.
Measure the temperature drop across the evaporator
coil.
Turn unit electrical power on.
SUPERHEAT CHARGING METHOD
(Use this method if the unit is equipped with an orifice-type metering device). To determine if the system is properly charged,
connect a gauge set to the high and low service ports in the compressor compartment. A temperature probe should be attached
to the suction line near the compressor so that suction superheat can be calculated. The probe must be insulated so the higher
surrounding temperatures will not affect the reading. A measurement of the outdoor ambient and the indoor wet bulb temperature is also required. (When using a digital temperature probe it is not necessary to insulate the probe because only the probe
“tip” is used for sensing.)
Operate system until temperatures and pressures stabilize (minimum of 15 minutes). Then measure and record indoor wet bulb
(WB) temperature at the indoor coil. Insert a thermometer with a “wet sock” attached to it into the coil section. Record the outdoor dry bulb (DB) temperature using a thermometer.
Measure and record the suction pressure at the suction service port. Using the Superheat table, note the superheat value corresponding to the intersection of the indoor wet bulb and the outdoor dry bulb. With the superheat value obtained from the table
and the suction pressure value previously recorded, find the intersection of the values in Suction Tube Temperature Table. This
is the required suction tube temperature at the suction service valve.
To bring the tube temperature in line with the required value, add refrigerant to the service port to cause the tube temperature to
fall and reclaim refrigerant to cause the temperature to rise.
Unitary Products Group
37
66307-YIM-B-0606
TABLE 35: SUPERHEAT CHARGING
SUCTION TUBE TEMPERATURE
SUCTION PRESSURE
PSIG (Service Port)
*.
0*
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
61.5
35
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
64.2
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
67.1
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
70
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
73
43
45
47
49
51
53
55
57
59
61
63
63
67
69
71
73
75
77
76
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
79.2
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
82.4
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
83
84.1
50
52
54
56
58
60
62
64
66
68
70
72
74
76
78
80
82
84
92.6
55
57
59
71
73
65
67
69
71
73
75
77
79
81
83
85
87
89
From TMP chart.
TABLE 36: COOLING SUPERHEAT 7-1/2 TON
SUCTION SUPERHEAT °F
OUTDOOR
TEMP °F
38
INDOOR WB TEMP °F
55
57
59
61
63
65
67
69
71
73
75
65
34.5
34.8
35.1
35.4
35.6
35.9
36.2
37.0
37.7
38.5
39.2
70
32.5
32.9
33.3
33.7
34.1
34.5
34.9
35.8
36.7
37.5
38.4
75
30.4
31.0
31.5
32.0
32.5
33.0
33.6
34.6
35.6
36.6
37.6
80
28.4
29.0
29.7
30.3
30.9
31.6
32.2
33.4
34.5
35.7
36.8
85
26.3
27.1
27.9
28.6
29.4
30.1
30.9
32.2
33.5
34.7
36.0
90
22.0
23.0
23.9
24.9
25.8
26.8
27.8
29.5
31.2
33.0
34.7
95
17.7
18.9
20.0
21.2
22.3
23.5
24.6
26.8
29.0
31.2
33.4
100
13.9
14.9
15.9
17.0
18.0
19.0
20.1
22.5
24.9
27.3
29.8
105
10.0
10.9
11.8
12.8
13.7
14.6
15.5
18.2
20.8
23.5
26.1
110
6.2
7.0
7.8
8.6
9.4
10.2
11.0
13.8
16.7
19.6
22.5
115
-
-
-
-
5.0
5.7
6.4
9.5
12.6
15.8
18.9
Unitary Products Group
66307-YIM-B-0606
TABLE 37: COOLING SUPERHEAT 10 TON
SUCTION SUPERHEAT °F
OUTDOOR
TEMP °F
INDOOR WB TEMP °F
55
57
59
61
63
65
67
69
71
73
75
65
41.0
40.9
40.7
40.6
40.5
40.4
40.3
40.1
40.0
39.9
39.8
70
38.3
38.2
38.2
38.2
38.1
38.1
38.1
38.0
38.0
38.0
37.9
75
35.6
35.6
35.7
35.7
35.8
35.8
35.9
35.9
36.0
36.0
36.1
80
25.7
26.7
27.6
28.5
29.5
30.4
31.3
32.3
33.2
34.1
35.1
85
15.9
17.7
19.5
21.3
23.2
25.0
26.8
28.6
30.4
32.3
34.1
90
14.4
16.1
17.8
19.5
21.1
22.8
24.5
26.2
27.9
29.5
31.2
95
13.0
14.5
16.0
17.6
19.1
20.7
22.2
23.7
25.3
26.8
28.4
100
9.8
11.4
13.0
14.5
16.1
17.7
19.3
20.9
22.5
24.0
25.6
105
6.6
8.2
9.9
11.5
13.1
14.8
16.4
18.0
19.6
21.3
22.9
110
4.6
5.9
7.2
8.5
9.8
11.1
12.4
13.7
14.9
16.2
17.5
115
2.5
3.5
4.5
5.4
6.4
7.4
8.3
9.3
10.3
11.2
12.2
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.
PREDATOR® FLASH CODES
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 23. 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 38.
Unitary Products Group
39
66307-YIM-B-0606
TABLE 38: UNIT CONTROL BOARD FLASH CODES
FLASH CODE
On Steady
1 Flash
2 Flashes
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
Control waiting ASCD*
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
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
13 Flashes
Compressor Held Off due to Low Voltage
14 Flashes
OFF
*.
1
Non-alarm condition.
Check
Alarm
History
Reset All
ASCDs for
One Cycle
Non Alarm
Condition Green
LED Flashing
Current Alarm
Flashed
Red LED
FIGURE 24: UNIT CONTROL BOARD
40
Unitary Products Group
66307-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.
b.
c.
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),
Proper wiring between the room thermostat and the
UCB, and
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.
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.
Unitary Products Group
24 volts at the thermostat Y1 terminal,
8.
Loose wiring from the room thermostat to the UCB.
10. If the thermostat and UCB are properly wired, replace
the UCB.
a.
41
66307-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-N-Lock 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.
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:
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.
For units without factory installed or with field installed
economizers, the UCB allows compressor operation all
42
8.
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.
If 24 volts is present at the UCB Y2 terminal, the compressor may be out due to an open high-pressure switch,
Unitary Products Group
66307-YIM-B-0606
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.
9.
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.
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.
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.
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.
2.
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.
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.
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.
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
43
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-NLocks 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.
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.
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.
Subject to change without notice. Printed in U.S.A.
Copyright © 2006 by Unitary Products Group. All rights reserved.
Unitary
Products
Group
66307-YIM-B-0606
Supersedes: 66307-YIM-A-0704/035-17277-004-A-0704
5005
York
Drive
Norman
OK
73069

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