INSTALLATION
MANUAL
SINGLE PACKAGE AIR CONDITIONERS AND
SINGLE PACKAGE ELECTRIC UNITS
DM090, 120 and 150
CONTENTS
7-1/2 TO 12-1/2 TON
(380V, 3 Phase, 60 HZ)
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
035-17311-002-A-0803
035-17311-002-A-0803
LIST OF FIGURES
Pg.# Fig. #
Fig. #
Pg.#
4
®
®
®
CURBS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
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LIST OF TABLES
Pg.# Tbl.#
Tbl.#
Pg.#
8
20 10 TON OPTIONAL MOTOR DOWN SHOT
21 12-1/2 TON STANDARD MOTOR DOWN SHOT
22 12-1/2 TON OPTIONAL MOTOR DOWN SHOT
23 7-1/2 TON STANDARD MOTOR SIDE SHOT
BLOWER PERFORMANCE . . . . . . . . . . . . . . . . . . . 28
24 7-1/2 TON OPTIONAL MOTOR SIDE SHOT
ELECTRICAL DATA - DM090 (7-1/2 TON) WITHOUT
25 10 TON STANDARD MOTOR DOWN SHOT
9
ELECTRICAL DATA - DM090 (7-1/2 TON) WITH
26 10 TON OPTIONAL MOTOR DOWN SHOT
10 ELECTRICAL DATA - DM120 (10 TON) WITHOUT
27 12-1/2 TON STANDARD MOTOR SIDE SHOT
11 ELECTRICAL DATA - DM120 (10 TON) WITH POWER
CONVENIENCE OUTLET . . . . . . . . . . . . . . . . . . . . . 20
28 12-1/2 TON OPTIONAL MOTOR SIDE SHOT
12 ELECTRICAL DATA - DM150 (12-1/2 TON) WITHOUT
13 ELECTRICAL DATA - DM150 (12-1/2 TON) WITH
34 7.5 TON STANDARD EFFICIENCY SUPERHEAT
CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
17 7-1/2 TON STANDARD MOTOR DOWN SHOT
35 10 TON STANDARD EFFICIENCY SUPERHEAT
18 7-1/2 TON OPTIONAL MOTOR DOWN SHOT
36 12.5 TON STANDARD EFFICIENCY SUPERHEAT
19 10 TON STANDARD MOTOR DOWN SHOT
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GENERAL
REFERENCE
Additional information is available in the following reference
forms:
®
YORK Predator units are single package 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.
•
•
•
General Installation - DM090 - 150, 035-17311-002
Pre-start & Post-start Check List - 035-18466-000
These units are completely assembled on rigid, permanently
attached base rails. All piping, refrigerant charge, and electri-
cal wiring is factory installed and tested. The units require
electric power and duct connections. The electric heaters
have nickel-chrome elements and utilize single-point power
connection.
Economizer Accessory -
Downflow Factory Installed, 035-18286-000
Downflow Field Installed, 035-18285-000
Horizontal Field Installed, 035-18287-000
•
•
•
•
•
Motorized Outdoor Air Damper 035-18283-000
Manual Outdoor Air Damper (0-100%) 035-18282-000
Manual Outdoor Air Damper (0-35%) 035-18281-000
Electric Heater Accessory 035-17291-001
SAFETY CONSIDERATIONS
Due to system pressure, moving parts, and electrical compo-
nents, installation and servicing of air conditioning equipment
can be hazardous. Only qualified, trained service personnel
should install, repair, or service this equipment. Untrained
personnel can perform basic maintenance functions of clean-
ing coils and filters and replacing filters.
Unit Renewal Parts List 035-17288-000
All forms referenced in this instruction may be ordered from:
Standard Register
Toll Free Fax: (877) 379-7920
Toll Free Phone: (877) 318-9675
Observe all precautions in the literature, labels, and tags
accompanying the equipment whenever working on air condi-
tioning equipment. Be sure to follow all other applicable
safety precautions and codes.
APPROVALS
Design certified by CSA as follows:
Wear safety glasses and work gloves. Use quenching cloth
and have a fire extinguisher available during brazing opera-
tions.
1. For use as a cooling only unit, cooling unit with supple-
mental electric heat or a forced air furnace.
2. For outdoor installation only.
3. For installation on combustible material and may be
installed directly on combustible flooring or, in the U.S.,
on wood flooring or Class A, Class B or Class C roof cov-
ering materials .
INSPECTION
As soon as a unit is received, it should be inspected for possi-
ble damage during transit. If damage is evident, the extent of
the damage should be noted on the carrier’s freight bill. A
separate request for inspection by the carrier’s agent should
be made in writing.
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.
This furnace is not to be used for temporary heating
of buildings or structures under construction.
Before performing service or maintenance opera-
tions on unit, turn off main power switch to unit. Elec-
trical shock could cause personal injury. Improper
installation, adjustment, alteration, service or main-
tenance can cause injury or property damage. Refer
to this manual. For assistance or additional informa-
tion consult a qualified installer, service agency.
Incorrect installation may create a condition where the
operation of the product could cause personal injury
or property damage.
The installer should pay particular attention to the words:
NOTE, CAUTION, and WARNING. NOTES are intended to
clarify or make the installation easier. CAUTIONS are given
to prevent equipment damage. WARNINGS are given to alert
installer that personal injury and/or equipment damage may
result if installation procedure is not handled properly.
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NOMENCLATURE
6½ - 12½ Ton Predator Model Number Nomenclature
D M 090 C00 A 3 A AA 3
Product Generation
Product Category
3 = Third Generation
D = Air Cond., Single Package
Product Identifier
Voltage
Additional Options
Installation Options
M = R-22 Standard Efficiency
A = No Options Installed
B = Option 1
C = Option 2
(See Next Page)
3 = 380-3-60
D = Options 1 & 2
E = Option 3
F = Option 4
Nominal Cooling Capacity - MBH
090 = 7-½ Ton
120 = 10 Ton
150 = 12-½ Ton
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
Heat Type & Nominal Heat Capacity
C00 = Cooling Only. Suitable for field installed electric heat
Electric Heat Options
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
E09 = 9 kW Electric Heat
E18 = 18 kW Electric Heat
E24 = 24 kW Electric Heat
E36 = 36 kW Electric Heat
E54 = 54 kW Electric Heat
Options
1 = Disconnect
2 = Non-Pwr’d Conv Outlet
3 = Smoke Detector S. A.
4 = Smoke Detector R. A.
5 = Pwr’d Conv Outlet
Airflow
A = Standard Motor
B = Standard Motor/Economizer/Barometric Relief (Downflow only)
C = Standard Motor/Economizer/Power Exhaust (Downflow only)
D = Standard Motor/Motorized Damper (Downflow only)
E = Standard Motor/Horizontal Economizer (No Barometric Relief or Power Exhaust)
F = Standard Motor/Slab Economizer/Power Exhaust (Downflow only)
G = Standard Motor/Slab Economizer/Barometric Relief (Downflow only)
L = Standard Motor/BAS Ready Econ (NoBASController)/Barometric Relief w/2" Pleated Filters (Downflow only)
M = Standard Motor/BAS Ready Econ (NoBASController)/Power Exhaust w/2" Pleated Filters (Downflow only)
N = High Static Motor
P = High Static Motor/Economizer/Barometric Relief (Downflow only)
Q = High Static Motor/Economizer/Power Exhaust (Downflow only)
R = High Static Motor/Motorized Damper (Downflow only)
S = High Static Motor/Horizontal Economizer (No Barometric Relief or Power Exhaust)
T = High Static Motor/Slab Economizer/Power Exhaust (Downflow only)
U =High Static Motor/Slab Economizer/Barometric Relief (Downflow only)
Y = High Static Motor/BAS Ready Econ (NoBASController)/Barometric Relief w/2" Pleated Filters (Downflow only)
Z = High Static Motor/BAS Ready Econ (NoBASController)/Power Exhaust w/2" Pleated Filters (Downflow only)
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NOMENCLATURE, ADDITONAL OPTIONS:
AA None
AB Phase Monitor
AC Coil Guard
AD Dirty Filter Switch
AE Phase Monitor & Coil Guard
AF Phase Monitor & Dirty Filter Switch
AG Coil Guard & Dirty Filter Switch
AH Phase Monitor, Coil Guard, & Dirty Filter Switch
CA CPC Controller with Dirty Filter Switch & Air Proving Switch
CB CPC Controller, DFS, APS & Phase Monitor
CC CPC Controller, DFS, APS & Coil Guard
CD CPC Controller, DFS, APS, Phase Monitor, & Coil Guard
CE CPC Controller, DFS, APS & Technicoat Cond. Coil
CF CPC Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor
CG CPC Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard
CH CPC Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard
CJ CPC Controller, DFS, APS & Technicoat Evap. Coil
CK CPC Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor
CL CPC Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard
CM CPC Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard
CN CPC Controller, DFS, APS & Technicoat Evap. & Cond Coils
CP CPC Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor
CQ CPC Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard
CR CPC Controller, DFS, APS, Technicoat Cond Coils, Phase Monitor, & 2” Pleated Filters
CV CPC Controller, DFS, APS, & 2” Pleated Filters
CX CPC Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, Coil Guard
HA Honeywell Excel 10 Controller with Dirty Filter Switch & Air Proving Switch
HB Honeywell Excel 10 Controller, DFS, APS & Phase Monitor
HC Honeywell Excel 10 Controller, DFS, APS & Coil Guard
HD Honeywell Excel 10 Controller, DFS, APS, Phase Monitor, & Coil Guard
HE Honeywell Excel 10 Controller, DFS, APS & Technicoat Cond. Coil
HF Honeywell Excel 10 Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor
HG Honeywell Excel 10 Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard
HH Honeywell Excel 10 Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard
HJ Honeywell Excel 10 Controller, DFS, APS & Technicoat Evap. Coil
HK Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor
HL Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard
HM Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard
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HN Honeywell Excel 10 Controller, DFS, APS & Technicoat Evap. & Cond Coils
HP Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor
HQ Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard
HR Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard
JA Johnson UNT Controller with Dirty Filter Switch & Air Proving Switch
JB Johnson UNT Controller, DFS, APS & Phase Monitor
JC Johnson UNT Controller, DFS, APS & Coil Guard
JD Johnson UNT Controller, DFS, APS, Phase Monitor, & Coil Guard
JE Johnson UNT Controller, DFS, APS & Technicoat Cond. Coil
JF Johnson UNT Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor
JG Johnson UNT Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard
JH Johnson UNT Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard
JJ
JK Johnson UNT Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor
JL Johnson UNT Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard
Johnson UNT Controller, DFS, APS & Technicoat Evap. Coil
JM Johnson UNT Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard
JN Johnson UNT Controller, DFS, APS & Technicoat Evap. & Cond Coils
JP Johnson UNT Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor
JQ Johnson UNT Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard
JR Johnson UNT Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard
NA Novar ETC-3 Controller with Dirty Filter Switch & Air Proving Switch
NB Novar ETC-3 Controller, DFS, APS & Phase Monitor
NC Novar ETC-3 Controller, DFS, APS & Coil Guard
ND Novar ETC-3 Controller, DFS, APS, Phase Monitor, & Coil Guard
NE Novar ETC-3 Controller, DFS, APS & Technicoat Cond. Coil
NF Novar ETC-3 Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor
NG Novar ETC-3 Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard
NH Novar ETC-3 Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard
NJ Novar ETC-3 Controller, DFS, APS & Technicoat Evap. Coil
NK Novar ETC-3 Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor
NL Novar ETC-3 Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard
NM Novar ETC-3 Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard
NN Novar ETC-3 Controller, DFS, APS & Technicoat Evap. & Cond Coils
NP Novar ETC-3 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor
NQ Novar ETC-3 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard
NR Novar ETC-3 Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard
TA Technicoat Condenser Coil
TB Technicoat Condenser Coil & Phase Monitor
TC Technicoat Condenser Coil & Coil Guard
TD Technicoat Condenser Coil & Dirty Filter Switch
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TE Technicoat Condenser Coil, Phase Monitor, & Coil Guard
TF Technicoat Condenser Coil, Phase Monitor, & Dirty Filter Switch
TG Technicoat Condenser Coil, Coil Guard, & Dirty Filter Switch
TH Technicoat Condenser Coil, Phase Monitor, Coil Guard, & Dirty Filter Switch
TJ Technicoat Evaporator Coil
TK Technicoat Evaporator Coil & Phase Monitor
TL Technicoat Evaporator Coil & Coil Guard
TM Technicoat Evaporator Coil & Dirty Filter Switch
TN Technicoat Evaporator Coil, Phase Monitor, & Coil Guard
TP Technicoat Evaporator Coil, Phase Monitor, & Dirty Filter Switch
TQ Technicoat Evaporator Coil, Coil Guard, & Dirty Filter Switch
TR Technicoat Evaporator Coil, Phase Monitor, Coil Guard, & Dirty Filter Switch
TS Technicoat Evaporator & Condenser Coils
TT Technicoat Evaporator & Condenser Coils & Phase Monitor
TU Technicoat Evaporator & Condenser Coils & Coil Guard
TV Technicoat Evaporator & Condenser Coils & Dirty Filter Switch
TW Technicoat Evaporator & Condenser Coils, Phase Monitor, & Coil Guard
TX Technicoat Evaporator & Condenser Coils, Phase Monitor, & Dirty Filter Switch
TY Technicoat Evaporator & Condenser Coils, Coil Guard, & Dirty Filter Switch
TZ Technicoat Evaporator & Condenser Coils, Phase Monitor, Coil Guard, & Dirty Filter Switch
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INSTALLATION
INSTALLATION SAFETY INFORMATION
Read these instructions before continuing this appliance
installation. This is an outdoor combination heating and cool-
ing unit. The installer must assure that these instructions are
made available to the consumer and with instructions to
retain them for future reference.
1. Install this furnace only in a location and position as
2. This equipment is not to be used for temporary heating
of buildings or structures under construction.
PRECEDING INSTALLATION
Toolless
Doorknobs
1. Remove the two screws holding the brackets in the front,
rear and compressor side fork-lift slots.
Installation
Instruction
Packet
Bracket
Turn down
Screws
FIGURE 3 - COMPRESSOR SECTION
LIMITATIONS
FIGURE 1 - UNIT SHIPPING BRACKET
These units must be installed in accordance with the follow-
ing:
2. Turn each bracket toward the ground and the protective
plywood covering will drop to the ground.
In U.S.A.:
3. Remove the condenser coil external protective covering
prior to operation.
1. National Electrical Code, ANSI/NFPA No. 70 - Latest
Edition
4. Remove the toolless doorknobs and instruction packet
prior to installation.
2. Local building codes, and
3. Local plumbing and waste water codes, and
4. Other applicable local codes.
Condenser
Coil External
Protective
Covering
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.
Barometric
Relief Hood in
Shipping Loca-
tion (if included)
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).
FIGURE 2 - CONDENSER COVERING
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035-17311-002-A-0803
Simplicity™ Control board
w/screw connector
Disconnect location
(optional disconnect switch)
for T-stat wiring and
network connection
Filter access (2” throw-away)
Terminal block for
hi-voltage connection
Filter drier (solid
core)
Condenser
section
Second model name-
plate inside hinged
access panel
Belt-drive
blower motor
Slideout motor
& blower
assembly for
easy access
adjustment &
service
Dual stage
cooling for
max. comfort
Compressor #2
access (high-
efficiency com-
pressor with
Compressor #1 access (high-
efficiency compressor w/
crankcase heater))
crankcase heater
Slide-out drain pan
with steel 3/4” FPT
connection
Base rails w/fork-
lift slots (3 sides)
and lifting holes)
Roof curbs in eight- and fourteen-inch
heights. Roof curbs for transitioning from
York Sunline™ footprint to the DM
Series footprint are also available
(field-installed accessory)
Side entry power
and control wiring
knockouts
Tool-less door
latch
FIGURE 4 - PREDATOR® COMPONENT LOCATION
TABLE 1: UNIT VOLTAGE LIMITATIONS
4. For ground level installation, use a level concrete slab
with a minimum thickness of 4 inches. The length and
width should be at least 6 inches greater than the unit
base rails. Do not tie slab to the building foundation.
Power Rating
Minimum
Maximum
380
350
418
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.
TABLE 2: UNIT TEMPERATURE LIMITATIONS
Temperature
Min.
Max.
6. Maintain level tolerance to 1/2” across the entire width
and length of unit.
Wet Bulb Temperature (°F) of Air on
57
72
Evaporator Coil
RIGGING AND HANDLING
Dry Bulb Temperature (°F) of Air on
0*
125
Condenser Coil
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.
*.
A low ambient accessory is available for operation
down to -20°F.
LOCATION
Use the following guidelines to select a suitable location for
these units:
1. Unit is designed for outdoor installation only.
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 under-
side.
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.
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035-17311-002-A-0803
TABLE 4: 6 POINT LOAD WEIGHT
Location (lbs.)*
Model
A
B
C
D
E
F
Before lifting, make sure the unit weight is distrib-
uted equally on the rigging cables so it will lift evenly.
158
168
180
142
151
161
128
136
145
187
198
212
207
219
235
230
244
262
DM090
DM120
DM150
Units may be moved or lifted with a forklift. Slotted openings
in the base rails are provided for this purpose.
*.
Weights include largest gas heat option.
LENGTH OF FORKS MUST BE A MINIMUM OF 60
INCHES.
TABLE 5: 4 POINT LOAD WEIGHT
Location (lbs.)*
Model
A
B
C
D
DM090
DM120
DM150
230
245
262
197
209
224
287
305
327
336
357
382
All panels must be secured in place when the unit is
lifted.
*.
Weights include largest gas heat option.
The condenser coils should be protected from rig-
ging cable damage with plywood or other suitable
material.
ꢀ
R
O
N
T
L
E
ꢀ
T
D
C
B
A
E
ꢀ
R
O
N
T
ꢀ
L
E
ꢀ
T
B
C
FIGURE 6 - UNIT 6 POINT LOAD
A
D
FIGURE 5 - UNIT 4 POINT LOAD
TABLE 3: UNIT WEIGHTS
Shipping Weight* (lb.)
Operating Weight† (lb.)
Model
DM090
1056
1121
1051
1116
FIGURE 7 - UNIT CENTER OF GRAVITY
CLEARANCES
DM120
DM150
Econ.
w/ PE
1200
85
1195
84
All units require particular clearances for proper operation
and service. Installer must make provisions for adequate
ventilation air in accordance with applicable provisions of the
for combustible construction, servicing, and proper unit oper-
ation.
150
148
Elec. Heat2
49
49
*.
Weights include largest gas heat option.
54kW heater.
†.
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035-17311-002-A-0803
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
5
0
-
3
/
4
C
o
n
t
r
o
l
P
o
w
e
r
E
n
t
r
y
E
n
t
r
y
Ø
7
/
8
Ø
2
-
1
/
2
P
o
w
e
r
4
-
1
/
4
E
n
t
r
y
Ø
2
-
1
/
2
C
o
n
v
e
n
i
e
e
n
c
e
P
o
w
r
O
u
t
l
e
t
ꢀ
D
S
o
r
B
e
a
s
e
r
a
i
l
E
n
t
r
y
8
Ø
7
/
i
m
n
s
i
o
a
n
i
s
ꢀ
R
O
N
T
e
e
D
e
t
l
A
1
7
-
3
/
1
6
3
0
-
3
/
1
6
ꢀ
D
S
o
r
D
e
r
a
i
n
i
m
n
s
i
o
a
n
i
s
6
-
3
/
1
6
2
4
-
3
/
1
6
5
9
e
e
D
e
t
l
B
L
E
ꢀ
T
8
9
2
7
FIGURE 8 - UNIT DIMENSIONS
TABLE 6: UNIT CLEARANCES
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.
Top*
72”
36”
36”
Right
12”
36”
0”
Front
Left
Rear†
Bottom‡
2
-
3
/
8
DETAIL B
*.
Units must be installed outdoors. Overhanging struc-
ture or shrubs should not obstruct condenser air dis-
charge outlet.
3
-
3
/
4
†.
To remove the slide-out drain pan, a rear clearance of
sixty inches is required. If space is unavailable, the
drain pan can be removed through the front by separat-
ing the corner wall.
‡.
Units may be installed on combustible floors made from
wood or class A, B or C roof covering materials.
3
-
9
/
1
6
DETAIL C
DETAIL A
G
a
s
P
i
p
e
I
n
l
e
t
5
-
1
/
4
5
-
3
/
8
B
P
a
a
s
n
e
1
7
-
1
3
/
1
6
V
i
e
w
o
f
W
a
l
l
A
c
r
o
s
s
f
r
o
m
C
o
i
l
Unitary Products Group
13
035-17311-002-A-0803
.
32-11/16
6-13/16
6-13/16
Supply
Air
6-13/16
Return
Air
24
27-1/2
LEFT
21
18
21-3/16
19-3/16
17-3/16
12-15/16
7-1/8
FRONT
14-
23/32
Bottom
Power, Control
and
Convenience
Outlet Wiring
Entries
Bottom Gas
Supply Entry
Bottom
Condensate
Entry
16-3/8
18-1/16
19-5/8
63-1/2
FIGURE 9 - BOTTOM DUCT OPENINGS (FROM ABOVE)
1
8
-
1
/
4
D
o
t
P
l
u
g
s
R
e
t
u
r
n
2
8
-
1
/
4
A
i
r
S
u
p
p
l
y
A
i
r
1
8
-
1
/
4
P
ꢀ
D
a
t
c
h
P
l
a
t
e
o
r
S
l
i
P
d
e
-
O
u
t
1
8
-
1
/
1
6
r
a
i
n
a
n
2
-
3
1
/
3
2
5
-
5
/
3
2
2
8
-
1
/
4
3
1
-
1
1
/
1
6
FIGURE 10 - REAR DUCT DIMENSIONS
14
Unitary Products Group
035-17311-002-A-0803
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 recog-
nized 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 applica-
tion, no duct cover changes are necessary. For side duct
application, remove the side duct covers and install over the
bottom duct openings. The panels removed from the side
duct connections are designed to be reused by securing each
panel to its respective downflow opening. But keep in mind
that the supply panel is installed with the painted surface UP,
facing the heat exchanger, while the return panel is installed
with the painted surface DOWN, facing the downflow duct
opening. The supply panel is secured with the bracket
(already in place from the factory) and two screws. It’s a snug
fit for the panel when sliding it between the heat exchanger
and unit bottom, but there is room. The return panel is
secured with four screws.
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.
rear air duct openings.
R
I
G
H
T
8
0
-
5
/
8
I
N
S
U
L
A
T
E
D
D
E
C
K
U
N
D
E
R
C
O
N
D
E
N
S
E
R
S
E
C
T
I
O
N
2
0
S
U
P
P
L
Y
2
0
6
R
E
T
U
R
N
2
T
Y
P
.
3
0
I
N
S
O
U
L
A
T
E
D
D
E
C
K
U
N
D
E
R
5
0
-
1
/
2
C
M
P
R
E
S
S
O
R
S
E
C
T
I
O
N
ꢀ
R
O
N
T
8
o
r
1
4
FIGURE 11 - PREDATOR® ROOF CURB DIMENSIONS
2
T
Y
P
2
3
4
3
0
-
1
/
2
5
0
-
1
/
2
8
0
-
5
/
8
2
6
R
E
T
U
R
N
S
U
P
P
L
Y
1
0
7
6
-
5
/
8
5
9
-
1
/
4
9
4
ꢀ
R
O
N
T
R
I
G
H
T
6
4
-
1
/
4
FIGURE 12 - SUNLINE™ TO PREDATOR® TRANSITION ROOF CURBS
Unitary Products Group
15
035-17311-002-A-0803
CONDENSATE DRAIN
The side condensate drain is reversible and maybe re-ori-
ented to the rear of the cabinet to facilitate condensate pip-
ing. A condensate drain connection is available through the
base pan for piping inside the roof curb. Trap the connection
from freezing.
When fastening ductwork to side duct flanges on
unit, insert screws through duct flanges only. DO
NOT insert screws through casing. Outdoor duct-
work must be insulated and water-proofed.
Plumbing must conform to local codes. Use a sealing com-
pound on male pipe threads. Install condensate drain line
from the 3/4 inch NPT female connection on the unit to an
open drain.
O
P
T
I
O
N
A
L
C
O
I
L
G
U
A
R
D
3
"
M
i
n
i
m
u
m
FIGURE 13 - SIDE PANELS WITH HOLE PLUGS
Note orientation. Panel is “insulation” side up.
FIGURE 16 - CONDENSATE DRAIN
COMPRESSORS
The compressors are mounted on elastomer insulators. The
mounting bolts have been fully tightened for shipping.
Do not loosen the compressor mounting bolts.
FIGURE 14 - RETURN DOWNFLOW PLENUM WITH
PANEL
FILTERS
Two-inch filters are supplied with each unit. One-inch filters
may be used with no modification to the filter racks. Filters
must always be installed ahead of evaporator coil and must
be kept clean or replaced with same size and type. Dirty fil-
ters reduce the capacity of the unit and result in frosted coils
or safety shutdown. All units use four (4) 20”x25”x2” filters.
The unit should not be operated without filters properly
installed.
Make sure that panel latches are properly positioned
on the unit to maintain an airtight seal.
FIGURE 15 - DISCHARGE PANEL IN PLACE
16
Unitary Products Group
035-17311-002-A-0803
THERMOSTAT WIRING
The thermostat should be located on an inside wall approxi-
mately 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
and maximum length.
Avoid damage to internal components if drilling
holes for disconnect mounting.
NOTE: Since not all local codes allow the mounting of a dis-
connect on the unit, please confirm compliance with
local code before mounting a disconnect on the unit.
TABLE 7: CONTROL WIRE SIZES
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.
Maximum Length*
Wire Size
18 AWG
150 Feet
*.
From the unit to the thermostat and back to the unit.
the appropriate unit wiring diagram mounted inside control
doors for control circuit and power wiring information.
POWER AND CONTROL WIRING
Field wiring to the unit, fuses, and disconnects must conform
to provisions of National Electrical Code (NEC), ANSI/NFPA
No. 70 – Latest Edition (in U.S.A.), current Canadian Electri-
cal Code C221, and/or local ordinances. The unit must be
electrically grounded in accordance with NEC and CEC as
specified above and/or local codes.
When connecting electrical power and control wiring
to the unit, water-proof connectors must be used so
that water or moisture cannot be drawn into the unit
during normal operation. The above water-proofing
conditions will also apply when installing a field sup-
plied disconnect switch.
Voltage tolerances which must be maintained at the com-
pressor terminals during starting and running conditions are
The internal wiring harnesses furnished with this unit are an
integral part of the design certified unit. Field alteration to
comply with electrical codes should not be required. If any of
the wire supplied with the unit must be replaced, replacement
wire must be of the type shown on the wiring diagram and the
same minimum gauge as the replaced wire.
POWER WIRING DETAIL
Units are factory wired for the voltage shown on the unit
power wiring, fuses, and disconnect switch.
A disconnect must be utilized for these units. Factory
installed disconnects are available. If installing a disconnect
Power wiring is brought into the unit through the side of the
unit or the basepan inside the curb.
(field supplied or York International supplied accessory),
Unitary Products Group
17
035-17311-002-A-0803
1
T
H
E
R
M
O
S
T
A
T
T
E
R
M
I
N
A
L
S
U
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I
T
T
E
R
M
I
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A
L
S
S
T
R
I
P
T
B
1
R
C
R
H
R
Y
1
Y
1
Y
2
Y
2
W
1
W
1
W
2
W
2
G
G
C
C
2
T
4
V
o
s
l
t
o
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a
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f
r
m
e
r
X
1
X
2
X
3
O
C
C
X
4
A
A
1
2
T
T
T
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M
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2
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4
7
0
1
3
2
4
I
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0
7
7
0
0
1
0
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4
o
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.
FIGURE 17 - ELECTRONIC THERMOSTAT FIELD WIRING
T
-
S
T
A
T
W
1
W
1
W
2
W
2
Y
Y
1
2
Y
Y
1
2
G
G
O
C
C
U
N
I
T
C
O
N
T
R
O
L
C
B
O
A
R
D
R
H
R
C
X
R
S
D
C
FIGURE 18 - FIELD WIRING 24 VOLT THERMOSTAT
18
Unitary Products Group
035-17311-002-A-0803
T
E
R
M
I
N
A
L
B
L
O
C
K
T
B
1
ꢀ
A
C
T
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ꢀ
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D
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R
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D
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C
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N
E
C
T
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U
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P
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S
E
H
O
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A
P
E
L
P
W
E
R
S
P
Y
FIGURE 19 - FIELD WIRING DISCONNECT
TABLE 8: ELECTRICAL DATA - DM090 (7-1/2 TON) WITHOUT POWER CONVENIENCE OUTLET
Min.
MCA
Max
Fuse*
Size
Max Fuse*
Size
Supply
Blower
Pwr
Exh
Pwr
OD Fan
Motors
Circuit
w/Power
Compressors
Conv
Electric Heater Actual Heater
Ampacity Exhaust
w/Power
Exhaust
Voltage
Motor FLA Motor Outlet
Model No.
KW
Amps
1.52
(Amps)
1.52
(Amps)
1.52 1.52
(Amps)
RLA
ea.
LRA
ea.
FLA
ea.
1.5 2
FLA
FLA
HP
HP
HP HP HP HP HP HP HP
HP
30
30
30
40
50
None
--
--
20.7 21.7 22.9 23.9 25 25
20.7 21.7 22.9 23.9 25 25
25.3 26.6 28.1 29.3 30 30
32.4 33.6 35.1 36.4 35 35
44.3 45.6 47.1 48.3 45 50
25
25
30
40
50
2TP04520950
2TP04521850
2TP04522450
2TP04523650
5.6
11.3
15
8.5
380
*
7.1
54.0
0.8
3.1
4.1
2.2
0.0
17.2
22.8
32.4
21.3
Maximum HACR breaker of the same AMP size is applicable.
TABLE 9: ELECTRICAL DATA - DM090 (7-1/2 TON) WITH POWER CONVENIENCE OUTLET
Min.
MCA
Max
Fuse*
Size
Max Fuse*
Size
Supply
Blower
Pwr
Exh
Pwr
OD Fan
Motors
Circuit
w/Power
Compressors
Conv
Electric Heater Actual Heater
Ampacity Exhaust
w/Power
Exhaust
Voltage
Motor FLA Motor Outlet
Model No.
KW
Amps
1.52
(Amps)
1.52
(Amps)
1.52 1.52
(Amps)
RLA
ea.
LRA
ea.
FLA
ea.
1.5 2
FLA
FLA
HP
HP
HP HP HP HP HP HP HP
HP
35
35
40
45
60
None
--
--
27
27
28 29.2 30.2 30 35
28 29.2 30.2 30 35
35
35
40
45
60
2TP04520950
2TP04521850
2TP04522450
2TP04523650
5.6
11.3
15
8.5
380
*
7.1
54.0
0.8
3.1
4.1
2.2
6.3
17.2
22.8
32.4
33.2 34.5 36 37.2 35 35
40.2 41.5 43 44.2 45 45
52.2 53.5 55 56.2 60 60
21.3
Maximum HACR breaker of the same AMP size is applicable.
Unitary Products Group
19
035-17311-002-A-0803
TABLE 10: ELECTRICAL DATA - DM120 (10 TON) WITHOUT POWER CONVENIENCE OUTLET
MCA
Max
Fuse*
Size
Max Fuse*
Size
Supply
Blower Motor Exh
FLA
Pwr
Pwr
Min. Circuit
Ampacity
(Amps)
OD Fan
Motors
w/Power
Exhaust
(Amps)
Compressors
Conv
Electric Heater Actual Heater
w/Power
Exhaust
Voltage
Motor Outlet
Model No.
KW
Amps
(Amps)
3
RLA
ea.
LRA
ea.
FLA
ea.
2
3
2
3
2
3
2
2
3
FLA
FLA
HP
HP
HP HP HP HP HP HP HP
HP
45
45
45
50
80
None
--
--
33.2 34.4 35.4 36.6 40 45
33.2 34.4 35.4 36.6 40 45
33.6 35.1 36.4 37.9 40 45
45.6 47.1 48.3 49.8 50 50
69.3 70.8 72.1 73.6 70 80
45
45
45
50
80
2TP04521850
2TP04522450
2TP04523650
2TP04525450
11.3
15
17.2
22.8
32.4
51.4
380
*
11.5
75.0
1.6
4.1
5.3
2.2
0.0
21.3
33.8
Maximum HACR breaker of the same AMP size is applicable.
TABLE 11: ELECTRICAL DATA - DM120 (10 TON) WITH POWER CONVENIENCE OUTLET
MCA
Max
Fuse*
Size
Max Fuse*
Size
Supply
Blower Motor Exh
FLA
Pwr
Pwr
Min. Circuit
Ampacity
(Amps)
OD Fan
Motors
w/Power
Exhaust
(Amps)
Compressors
Conv
Electric Heater Actual Heater
w/Power
Exhaust
Voltage
Motor Outlet
Model No.
KW
Amps
(Amps)
2
RLA
ea.
LRA
ea.
FLA
ea.
2
3
2
3
2
3
3
2
3
FLA
FLA
HP
HP
HP HP HP HP HP HP HP
HP
50
50
50
60
90
None
--
--
39.5 40.7 41.7 42.9 50 50
39.5 40.7 41.7 42.9 50 50
41.5 43 44.2 45.7 50 50
53.5 55 56.2 57.7 60 60
77.2 78.7 79.9 81.4 80 80
50
50
50
60
80
2TP04521850
2TP04522450
2TP04523650
2TP04525450
11.3
15
17.2
22.8
32.4
51.4
380
*
11.5
75.0
1.6
4.1
5.3
2.2
6.3
21.3
33.8
Maximum HACR breaker of the same AMP size is applicable.
TABLE 12: ELECTRICAL DATA - DM150 (12-1/2 TON) WITHOUT POWER CONVENIENCE OUTLET
Min.
MCA
Max
Fuse*
Size
Max Fuse*
Size
Supply
Blower
Pwr
Exh
Pwr
OD Fan
Motors
Circuit
w/Power
Compressors
Conv
Electric Heater Actual Heater
Ampacity Exhaust
(Amps) (Amps)
w/Power
Exhaust
Voltage
Motor FLA Motor Outlet
Model No.
KW
Amps
(Amps)
R3LA 5LRA
FLA
ea.
3
5
3
5
FLA
FLA
ea.
ea.
HP
HP
HP HP HP HP HP HP HP
HP
40
40
45
60
80
None
--
--
30.1 32.9 32.3 35.1 35 40
30.1 32.9 32.3 35.1 35 40
35.1 38.6 37.9 41.4 40 40
47.1 50.6 49.8 53.3 50 60
70.8 74.3 73.6 77.1 80 80
40
40
40
50
80
2TP04521850
2TP04522450
2TP04523650
2TP04525450
11.3
15
17.2
22.8
32.4
51.4
380
*
9.6
79.0
1.6
5.3
8.1
2.2
0.0
21.3
33.8
Maximum HACR breaker of the same AMP size is applicable.
TABLE 13: ELECTRICAL DATA - DM150 (12-1/2 TON) WITH POWER CONVENIENCE OUTLET
MCA
Max
Max Fuse*
Size
Supply
Blower Motor Exh
FLA
Pwr
Pwr
Min. Circuit
Ampacity
(Amps)
OD Fan
Motors
w/Power
Exhaust
(Amps)
Fuse*
Size
Compressors
Conv
Electric Heater Actual Heater
w/Power
Exhaust
Voltage
Motor Outlet
Model No.
KW
Amps
(Amps)
R3LA 5LRA
FLA
ea.
3
5
3
5
FLA
FLA
ea.
ea.
HP
HP
HP HP HP HP HP HP HP
HP
50
50
50
70
90
None
--
--
36.4 39.2 38.6 41.4 45 45
36.4 39.5 38.7 42.2 45 45
43 46.5 45.7 49.2 45 50
55 58.5 57.7 61.2 60 60
78.7 82.2 81.4 84.9 80 90
45
45
50
60
90
2TP04521850
2TP04522450
2TP04523650
2TP04525450
11.3
15
17.2
22.8
32.4
51.4
380
*
9.6
79.0
1.6
5.3
8.1
2.2
6.3
21.3
33.8
Maximum HACR breaker of the same AMP size is applicable.
20
Unitary Products Group
035-17311-002-A-0803
TABLE 14: PHYSICAL DATA
Models
120
Component
090
150
Blower, Centrifugal (Dia. X Wd. in.)
15 x 15
15 x 15
15 x 15
Evaporator
Blower
Motor, Standard (HP)
Motor, Optional (HP)
Rows
1-1/2
2
2
3
3
5
2
2
3
Fins per Inch
15
32
15
40
15
40
Evaporator
DM
Height (in.)
Coil
2
10.6
13.2
13.2
Face Area (ft. each)
Propeller Dia. (in., each)
Motor (HP, each)
CFM, Nominal (each)
Rows (each)
24
1/3
3400
1
24
3/4
4400
1
24
3/4
4400
2
Condenser
Fan
(2 per Unit)
DM
DM
Condenser
Coil
(2 per unit)
Fins per Inch
20
20
20
Height (in. each)
28
44
44
2
9.2
4/12
4/6
14.5
6/12
6/12
14.5
10/12
9/8
Face Area (ft. each)
System 1 (lb./oz.)
System 2 (lb./oz.)
Refrigerant
Charge
DM
DM
Quantity
Type
2
Recip
25x20x2
4
2
Recip
25x20x2
4
2
Recip
25x20x2
4
Compressors
Air Filters
Size (Wd. x Ht. x Thickness in.)
Number Per Unit
OPTIONS/ACCESSORIES
TABLE 15: MINIMUM SUPPLY AIR CFM
ELECTRIC HEAT ACCESSORIES
Heater
Unit Model Size, Nominal Tons
7.5 10
Minimum Supply Air CFM
Electric heaters are available as field installed accessories.
Refer to electric heat instructions for installation. These heat-
ers 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.
12.5
kW
Voltage
9
2250
N/A
N/A
18
24
36
54
2250
2250
2250
N/A
3000
3000
3000
3000
3750
3750
3750
3750
ELECTRIC HEAT OPTION
380
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.
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 com-
plete the assembly. Field installed Motorized Outdoor
Damper accessories include complete instructions for instal-
lation.
Fuses are supplied, where required, by the factory. Some kW
trical data.
Unitary Products Group
21
035-17311-002-A-0803
ECONOMIZER
ON position and then OFF or energize and de-energize
terminals “R” to “G”.
The Economizer can be a factory installed option or a field
installed accessory. If factory installed, refer to the instruc-
tions included with the outdoor air hood to complete the
assembly. Field installed Economizer accessories include
complete instructions for installation.
•
With the thermostat set to the indoor fan ON position or
terminals “R” to “G” energized, turn the Minimum Posi-
tion Adjusting screw (located on the damper control
module) counterclockwise until the desired minimum
damper position has been attained.
There are two Economizer options:
ENTHALPY SET POINT ADJUSTMENT
1. Down Flow application with barometric relief hood
standard.
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:
2. Horizontal Flow application that requires the purchase of
a barometric relief hood.
POWER EXHAUST
•
For a single enthalpy operation carefully turn the set
point adjusting screw (found on the damper control mod-
ule) to the "A", "B", "C" or "D" setting corresponding to
the lettered curve of the Enthalpy Set Point Adjustment
The Power Exhaust can be a factory installed option or a field
installed accessory. If factory installed, refer to the instruc-
tions included with the outdoor air hood to complete the
assembly. Field installed Power Exhaust accessories include
complete instructions for installation.
•
For a dual enthalpy operation, carefully turn the set point
adjusting screw fully clockwise past the "D" setting.
The Power Exhaust factory installed option is for Down Flow
application only.
POWER EXHAUST DAMPER SET POINT (WITH OR WITH-
OUT POWER EXHAUST)
There are two field installed Power Exhaust accessories:
1. Down Flow application.
•
With no power exhaust option, adjust the Exhaust Air
Adjustment Screw fully clockwise. This will allow 2nd
stage cooling to operate.
2. Horizontal Flow application that requires the purchase of
a barometric relief hood.
•
With power exhaust option, each building pressurization
requirement will be different. The point at which the
power exhaust comes on is determined by the econo-
mizer 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.
RAIN HOOD
All of the hood components, including the filters, the gasket-
ing 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.
INDOOR AIR QUALITY AQ
ECONOMIZER AND POWER EXHAUST SET POINT
ADJUSTMENTS AND INFORMATION
Indoor Air Quality (indoor sensor input): Terminal AQ accepts
a +2 to +10 Vdc signal with respect to the (AQ1) terminal.
When the signal is below it's set point, the actuator is allowed
to modulate normally in accordance with the enthalpy and
mixed air sensor inputs. When the AQ signal exceeds it's set
point setting and there is no call for free cooling, the actuator
is proportionately modulated from the 2 to 10 Vdc signal, with
2 Vdc corresponding to full closed and 10 Vdc corresponding
to full open. When there is no call for free cooling, the damper
position is limited by the IAQ Max damper position setting.
When the signal exceeds it's set point (Demand Control Ven-
tilation 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.
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.
MINIMUM POSITION ADJUSTMENT
•
•
Optional CO Space Sensor Kit Part # 2AQ04700324
2
•
Check that the damper blades move smoothly without
binding; carefully turn the Minimum Position Adjust
screw (found on the damper control module) fully clock-
wise and then set the thermostat indoor fan switch to the
Optional CO Sensor Kit Part # 2AQ04700424
2
Replace the top rear access panel on the unit.
22
Unitary Products Group
035-17311-002-A-0803
CONTROL POINT
APPROX. 0F (0C)
AT 50% RH
CONTROL
CURVE
85 90 95 100 105 110
(29) (32) (35) (38) (41) (43)
A
B
C
D
73 (23)
70 (21)
67 (19)
63 (17)
80
(27)
75
(24)
70
(21)
65
(18)
0
(16)
55
(13)
A
B
50
(10)
C
45
(7)
D
40
(4)
35
(2)
A
B
C
D
40 45
(4) (7)
65 70 75 80
(24) (27)
95
105 110
(41) (43)
35
(2)
50 55 60
(10) (13) (16)
85 90
(29) (32)
100
(38)
(21)
(18)
(35)
APPROXIMATE DRY BULB TEMPERATURE - 0F (0C)
FIGURE 20 - ENTHALPY SET POINT CHART
Exhaust Air
Adjustment
Screw
EXH
Set
N
P
T
N1
TR
TR1
Exhaust Air LED
Damper Min.
Position
Screw
24
Vac
HOT
24
Vac
COM
EXH
P1
T1
Min
Pos
Indoor Air Quality
Max. Adjustment
Screw
+
IAQ
Max
1
2
Indoor Air Quality
LED
IAQ
AQ1
SO+
AQ
SO
5
4
Indoor Air Quality
Min. Adjustment
Screw
IAQ
Min
3
Free
Cool
Free Cooling LED
SR
B
SR+
EF
EF1
C
D
A
Economizer Enthalpy
Set Point Adjustment
Screw
FIGURE 21 - HONEYWELL ECONOMIZER CONTROL W7212
Unitary Products Group
23
035-17311-002-A-0803
PHASING
A
®
Predator units are properly phased at the factory. Check for
proper compressor rotation. If the blower or compressors
rotate in the wrong direction at start-up, the electrical connec-
tion to the unit is misphased. Change the phasing of the Field
Line Connection at the factory or field supplied discon-
nect to obtain proper rotation. (Scroll compressors operate in
only one direction. If the scroll is drawing low amperage, has
similar suction and discharge pressures, or producing a high
noise level, the scroll is misphased.)
A
C*
* NEVER LOOSEN
A
B
SPAN LENGTH
DEFL. FORCE
Scroll compressors require proper rotation to oper-
ate correctly. Units are properly phased at the fac-
tory. Do not change the internal wiring to make the
blower condenser fans, or compressor rotate cor-
rectly.
BLOWER ROTATION
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’).
FIGURE 22 - BELT ADJUSTMENT
TABLE 16: SUPPLY AIR LIMITATIONS
Unit Size
Minimum
Maximum
090
120
150
2250
3000
3750
3750
5000
6250
Procedure for adjusting belt tension:
1. Loosen six nuts (top and bottom) A.
2. Adjust by turning (B).
3. Never loosen nuts (C).
BELT TENSION
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.
The tension on the belt should be adjusted as shown in
Figure 22.
To determine the deflection distance from normal
position, use a straight edge from sheave to sheave
as reference line. The recommended deflection
force is as follows:
Tension new belts at the max. deflection force rec-
ommended for the belt section. Check the belt ten-
sion 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).
24
Unitary Products Group
035-17311-002-A-0803
* †
TABLE 17: 7-1/2 TON STANDARD MOTOR DOWN SHOT BLOWER PERFORMANCE
TURNS OPEN**
ESP‡
0
1
2
3
4
5
W††
W††
W††
W††
W††
W††
CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP
0.2
0.4
0.6
0.8
1.0
-
-
-
3715 1573 1.69
3510 1490 1.60
3146 1351 1.45
3634 1434 1.54
3320 1313 1.41
3431 1265 1.36
3079 1145 1.23
2621 1005 1.08
3218 901 0.97
2832 810 0.87
2307 706 0.76
3024 976 1.05
2586 860 0.92
3650 1657 1.78
3334 1522 1.63
2903 1352 1.45
2910 1169
1.25
-
-
-
-
-
-
-
-
-
2622 1167
1.25
-
2404 1013 1.09
2054
-
858
-
0.92
-
-
-
-
-
-
-
2356 1159
1.24
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
Blower performance includes two-inch throwaway filters.
†.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
W = Watts
††.
* †
TABLE 18: 7-1/2 TON OPTIONAL MOTOR DOWN SHOT BLOWER PERFORMANCE
TURNS OPEN**
ESP‡
0
1
2
3
4
5
W††
W††
W††
W††
W††
W††
CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3992 1904 2.04 3798 1679 1.80
3930 2017 2.16 3734 1786 1.92 3486 1552 1.66
3947 2176 2.33 3670 1895 2.03 3394 1641 1.76 3084 1401 1.50
4138 2384 2.56 3623 2009 2.15 3323 1742 1.87 2971 1477 1.58 2591 1236 1.33
4126 2430 2.61 3643 2145 2.30 3224 1820 1.95 2889 1569 1.68 2466 1306 1.40
-
-
-
-
-
-
-
-
-
-
-
-
3613 2238 2.40 3143 1921 2.06 2748 1621 1.74 2369 1385 1.49
-
-
-
-
-
-
-
-
-
3099 2039 2.19 2636 1714 1.84 2195 1424 1.53
2586 1833 1.97
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
Blower performance includes two-inch throwaway filters.
†.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
W = Watts
††.
Unitary Products Group
25
035-17311-002-A-0803
* †
TABLE 19: 10 TON STANDARD MOTOR DOWN SHOT BLOWER PERFORMANCE
TURNS OPEN**
ESP‡
0
1
2
3
4
5
W††
W††
W††
W††
W††
W††
CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP
0.2
0.4
0.6
0.8
1.0
-
-
-
-
-
-
-
-
-
3896 1639 1.76 3688 1453 1.56 3447 1268 1.36
4040 2076 2.23
3890 2006 2.15
3620 1882 2.02
3227 1708 1.83
4005 1934 2.07 3790 1698 1.82 3569 1508 1.62 3333 1330 1.43 3057 1147 1.23
3697 1790 1.92 3427 1550 1.66 3152 1356 1.45
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3324 1629 1.75 2972 1380 1.48
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
Blower performance includes two-inch throwaway filters.
†.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
W = Watts
††.
* †
TABLE 20: 10 TON OPTIONAL MOTOR DOWN SHOT BLOWER PERFORMANCE
TURNS OPEN**
ESP‡
0
1
2
3
4
5
W††
W††
W††
W††
W††
W††
CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP
4965 3485 3.74
4876 3416 3.66
4713 3291 3.53
4476 3116 3.34
4165 2898 3.11
3779 2646 2.84
3319 2372 2.54
4875 3150 3.38 4613 2739 2.94 4322 2374 2.55 4156 2106 2.26 3907 1860 1.99
4651 2997 3.21 4359 2582 2.77 4038 2220 2.38 3860 1966 2.11 3590 1724 1.85
4387 2823 3.03 4077 2417 2.59 3719 2059 2.21 3541 1827 1.96 3242 1584 1.70
0.4
0.6
0.8
1.0
1.2
1.4
1.6
4084 2632 2.82 3768 2245 2.41 3365 1892 2.03 3197 1691 1.81
-
-
-
-
-
-
-
-
-
-
-
-
3741 2427 2.60 3432 2070 2.22
3359 2212 2.37 3069 1895 2.03
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
Blower performance includes two-inch throwaway filters.
†.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
W = Watts
††.
26
Unitary Products Group
035-17311-002-A-0803
* †
TABLE 21: 12-1/2 TON STANDARD MOTOR DOWN SHOT BLOWER PERFORMANCE
TURNS OPEN**
ESP‡
0
1
2
3
4
5
W††
W††
W††
W††
W††
W††
CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP
0.4
0.6
0.8
1.0
1.2
1.4
5078 3630 3.89 4809 3103 3.33 4594 3053 3.27 4360 2478 2.66 4090 2093 2.24 3812 1798 1.93
4865 3456 3.71 4584 2961 3.17 4349 2912 3.12 4106 2318 2.49 3814 1964 2.11
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
4642 3284 3.52 4356 2828 3.03 4089 2776 2.98 3840 2137 2.29
-
-
-
-
-
-
-
-
-
-
-
-
4408 3114 3.34 4124 2705 2.90 3815 2647 2.84
-
-
-
-
-
-
-
-
-
4164 2947 3.16 3889 2592 2.78
3910 2787 2.99
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
Blower performance includes two-inch throwaway filters.
†.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
W = Watts
††.
* †
TABLE 22: 12-1/2 TON OPTIONAL MOTOR DOWN SHOT BLOWER PERFORMANCE
TURNS OPEN**
ESP‡
0
1
2
3
4
5
W††
W††
W††
W††
W††
W††
CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP
5994 5400 5.79 5565 4369 4.69 5488 4169 4.47 5264 3599 3.86 4990 3085 3.31 4738 2812 3.02
5824 5216 5.59 5368 4186 4.49 5289 3991 4.28 5049 3437 3.69 4763 2937 3.15 4491 2655 2.85
5641 5022 5.39 5170 4012 4.30 5076 3807 4.08 4822 3272 3.51 4528 2790 2.99 4235 2497 2.68
5444 4819 5.17 4971 3846 4.12 4847 3618 3.88 4584 3103 3.33 4286 2644 2.83 3969 2340 2.51
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
5233 4609 4.94 4771 3687 3.95 4604 3426 3.67 4335 2933 3.15 4035 2499 2.68
5009 4394 4.71 4571 3537 3.79 4346 3233 3.47 4074 2762 2.96 3777 2356 2.53
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
4771 4174 4.48 4370 3395 3.64 4074 3040 3.26 3802 2590 2.78
-
-
-
-
-
-
-
-
-
-
-
-
4520 3951 4.24 4169 3262 3.50 3786 2850 3.06
-
-
-
-
-
-
-
-
-
4255 3728 4.00 3966 3137 3.36
3976 3505 3.76 3763 3020 3.24
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
Blower performance includes two-inch throwaway filters.
†.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
W = Watts
††.
Unitary Products Group
27
035-17311-002-A-0803
* †
TABLE 23: 7-1/2 TON STANDARD MOTOR SIDE SHOT BLOWER PERFORMANCE
TURNS OPEN**
ESP‡
0
1
2
3
4
5
W††
W††
W††
W††
W††
W††
CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP
0.4
0.6
0.8
1.0
1.2
-
-
-
-
-
-
-
-
-
3736 1476 1.58 3487 1284 1.38
3389 1339 1.44 3094 1151 1.23
3231 1109 1.19 3001 970
1.04
3572 1514 1.62
2764
972
1.04 2446 824
0.88
3422 1558 1.67 3179 1364 1.46
2891 1347 1.44 2372 1088 1.17
2889 1164 1.25 2554
985
1.06
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
2050
-
922
-
0.99
-
-
-
-
-
-
-
2017 1051 1.13
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
Blower performance includes two-inch throwaway filters.
†.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
W = Watts
††.
* †
TABLE 24: 7-1/2 TON OPTIONAL MOTOR SIDE SHOT BLOWER PERFORMANCE
TURNS OPEN**
ESP‡
0
1
2
3
4
5
W††
W††
W††
W††
W††
W††
CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3910 1726 1.85
3597 1430 1.53
3172 1430 1.53
2248 1143 1.23
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
3857 1842 1.98
3503 1689 1.81
3032 1497 1.61
2160 1217 1.31
3804 1957 2.10
3774 2088 2.24 3406 1778 1.91
3327 1866 2.00 2926 1578 1.69
2537 1544 1.66 2043 1296 1.39
-
-
-
-
-
-
-
-
-
-
-
-
3270 1971 2.11
-
-
-
-
-
-
-
-
-
3196 2077 2.23 2460 1651 1.77
2426 1768 1.90
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
Blower performance includes two-inch throwaway filters.
†.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
W = Watts
††.
28
Unitary Products Group
035-17311-002-A-0803
* †
TABLE 25: 10 TON STANDARD MOTOR DOWN SHOT BLOWER PERFORMANCE
TURNS OPEN**
ESP‡
0
1
2
3
4
5
W††
W††
W††
W††
W††
W††
CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP
0.2
0.4
0.6
0.8
1.0
-
-
-
-
-
-
-
-
-
3896 1639 1.76 3688 1453 1.56 3447 1268 1.36
4040 2076 2.23 4005 1934 2.07 3790 1698 1.82 3569 1508 1.62 3333 1330 1.43 3057 1147 1.23
3890 2006 2.15 3697 1790 1.92 3427 1550 1.66 3152 1356 1.45
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3620 1882 2.02 3324 1629 1.75 2972 1380 1.48
3227 1708 1.83
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
Blower performance includes two-inch throwaway filters.
†.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
W = Watts
††.
* †
TABLE 26: 10 TON OPTIONAL MOTOR DOWN SHOT BLOWER PERFORMANCE
TURNS OPEN**
ESP‡
0
1
2
3
4
5
W††
W††
W††
W††
W††
W††
CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP
0.4
0.6
0.8
1.0
1.2
1.4
1.6
4965 3485 3.74 4875 3150 3.38 4613 2739 2.94 4322 2374 2.55 4156 2106 2.26 3907 1860 1.99
4876 3416 3.66 4651 2997 3.21 4359 2582 2.77 4038 2220 2.38 3860 1966 2.11 3590 1724 1.85
4713 3291 3.53 4387 2823 3.03 4077 2417 2.59 3719 2059 2.21 3541 1827 1.96 3242 1584 1.70
4476 3116 3.34 4084 2632 2.82 3768 2245 2.41 3365 1892 2.03 3197 1691 1.81
-
-
-
-
-
-
-
-
-
-
-
-
4165 2898 3.11
3779 2646 2.84 3359 2212 2.37 3069 1895 2.03
3319 2372 2.54
3741 2427 2.60 3432 2070 2.22
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
Blower performance includes two-inch throwaway filters.
†.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
W = Watts
††.
Unitary Products Group
29
035-17311-002-A-0803
* †
TABLE 27: 12-1/2 TON STANDARD MOTOR SIDE SHOT BLOWER PERFORMANCE
TURNS OPEN**
ESP‡
0
1
2
3
4
5
W††
W††
W††
W††
W††
W††
CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP CFM
BHP
5201 3162 3.39 4966 2796 3.00 4681 2405 2.58 4355 2054 2.20
0.4
0.6
0.8
1.0
1.2
1.4
-
-
-
-
-
-
-
-
-
-
-
-
5220 3395 3.64 4942 2980 3.20 4657 2608 2.80 4358 2230 2.39 4007 1890 2.03
4944 3194 3.43 4661 2806 3.01 4378 2572 2.76 4016 2057 2.21
-
-
-
-
-
-
-
-
-
-
-
-
5003 3490 3.74 4647 2988 3.20 4380 2636 2.83 4030 2257 2.42
-
-
-
-
-
-
-
-
-
4724 3290 3.53 4363 2875 3.08 4012 2505 2.69
4428 3040 3.26
-
-
-
-
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
Blower performance includes two-inch throwaway filters.
†.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
W = Watts
††.
* †
TABLE 28: 12-1/2 TON OPTIONAL MOTOR SIDE SHOT BLOWER PERFORMANCE
TURNS OPEN**
ESP‡
0
1
2
3
4
5
W††
W††
W††
W††
W††
W††
CFM
BHP CFM
BHP CFM
BHP
CFM
BHP CFM
BHP CFM
BHP
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
-
-
-
-
-
-
-
-
-
6447 5315 5.70 6207 4760 5.1046 5966 4205 4.51 5717 3716 3.98 5470 3307 3.55
6110 4917 5.27 5965 4464
5772 4519 4.85 5741 4274
4.79
4.58
4.34
4.13
3.94
3.71
3.47
3.07
-
5740 4023 4.31 5430 3501 3.75 5126 3054 3.28
5503 3821 4.10 5162 3294 3.53 4849 2870 3.08
5244 3611 3.87 4882 3101 3.33 4530 2667 2.86
4941 3387 3.63 4589 2906 3.12 4225 2502 2.68
4651 3178 3.41 4284 2716 2.91 3858 2280 2.45
4365 2983 3.20 3951 2516 2.70 3491 2058 2.21
6235 5521 5.92 5628 4407 4.73 5474 4048
5881 5137 5.51 5384 4205 4.51 5248 3854
5695 4950 5.31 5123 3996 4.29 5014 3670
5471 4728 5.07 4919 3828 4.11 4732 3460
5242 4514 4.84 4656 3611 3.87 4438 3240
4954 4231 4.54 4339 3380 3.62 3905 2861
3998 2740 2.94 3618 2316 2.48
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3631 2497 2.68
-
-
-
-
-
-
-
-
-
-
-
-
4585 3934 4.22 4022 3149 3.38
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
4217 3637 3.90
3848 3340 3.58
-
-
-
-
-
-
-
-
*.
Blower performance for gas heat includes maximum number of heat tubes available for each tonnage.
Blower performance includes two-inch throwaway filters.
†.
‡.
ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been
deducted from the total static pressure of the blower.
**.
“Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
W = Watts
††.
•
•
Blower performance includes dry coil and two-inch
filters.
Blower performance for gas heat includes the maximum
number of heat tubes available for each tonnage.
•
ESP (External Static Pressure) given is that available for
the supply and return air duct system. All internal resis-
tances have been deducted from the total static pressure
of the blower.
30
Unitary Products Group
035-17311-002-A-0803
TABLE 29: INDOOR BLOWER SPECIFICATIONS
MOTOR
RPM Eff.
1-1/2 1725 80% 1.15
MOTOR SHEAVE
BLOWER SHEAVE
MODEL
DM090
DM120
DM150
BELT
HP
SF
Frame Datum Dia. (in.) Bore (in.) Model Datum Dia. (in.) Bore (in.) Model
56
56
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
3.4 - 4.4
4.3 - 5.3
7/8
7/8
1VM50
1VM50
1VM50
1VM50
1VM50
1VP56
9.0
7.5
8.5
7.0
7.0
6.7
1
1
1
1
1
1
AK94
AK79
AK89
AK74
AK74
BK77
A57
A55
A56
A54
A54
BX55
2
2
3
3
5
1725 80% 1.15
1725 80% 1.15
1725 80% 1.15
1725 80% 1.15
1725 87% 1.15
56
7/8
56
7/8
56
7/8
184T
1 1/8
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
1. Drill two 5/16 inch holes, one in the return air duct as
close to the inlet of the unit as possible, and another in
the supply air duct as close to the outlet of the unit as
possible.
2. Insert eight-inches of 1/4 inch metal tubing into the air-
flow on both sides of the indoor coil.
2. Using the whole drilled in step 1, insert eight inches of
1/4 inch metal tubing into the airflow of the return and
supply air ducts of the unit.
NOTE: The tubes must be inserted and held in a position
perpendicular to the air flow so that velocity pres-
sure will not affect the static pressure readings.
NOTE: The tubes must be inserted and held in position per-
pendicular to the airflow so that velocity pressure
will not affect the static pressure readings.
3. Use an Inclined Manometer or Magnehelic to determine
the pressure drop across a dry evaporator coil. Since the
moisture on an evaporator coil can vary greatly, measur-
ing the pressure drop across a wet coil under field condi-
tions 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.
NOTE: De-energize the compressors before taking any test
measurements to assure a dry evaporator coil.
5. Select the correct blower performance table for the unit
and downflow configuration.
4. 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.
6. Determine the unit Measured CFM from the Blower Per-
formance Table, External Static Pressure and the num-
ber of turns the variable motor sheave is open.
6. After readings have been obtained, remove the tubes
and replace the dot plugs.
8. After reading has been obtained, remove the tubes and
seal holes.
NOTE: With the addition of field installed accessories
repeat this procedure.
Failure to properly adjust the total system air quan-
tity can result in extensive blower damage.
Failure to properly adjust the total system air quan-
tity can result in extensive blower damage.
Unitary Products Group
31
035-17311-002-A-0803
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.
Use the equation to determine the required DD for the new
motor sheave,
4,000 CFM
3,800 CFM
• 4.0 in. = 4.21 in.
(
)
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.
sheave to 1 turn open.
New BHP
= (Speed increase)3• BHP at 3,800 CFM
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:
= (Speed increase)3 • Original BHP
= New BHP
Required CFM
Measured CFM
New motor Amps
(
• Existing DD = New DD
)
= (Speed increase)3• Amps at 3,800 CFM
Use the following tables and the DD calculated per the above
equation to adjust the motor variable pitch sheave.
= (Speed increase)3 • Original Amps
= New Amps
32
Unitary Products Group
035-17311-002-A-0803
TABLE 30: ADDITIONAL STATIC RESISTANCE
Electric Heat KW†
24
*
† ‡
CFM
Cooling Only
Economizer
9
18
36
54
2300
2500
2700
2900
3100
3300
3500
3700
3900
4100
4300
4500
4700
4900
5100
5300
5500
5700
5900
6100
6300
0.08
0.09
0.11
0.12
0.14
0.16
0.18
0.20
0.23
0.25
0.28
0.30
0.33
0.36
0.39
0.42
0.45
0.48
0.52
0.56
0.60
0.02
0.02
0.03
0.03
0.03
0.03
0.04
0.04
0.04
0.04
0.05
0.05
0.05
0.05
0.06
0.06
0.06
0.06
0.07
0.07
0.07
0.07
0.08
0.09
0.10
0.12
0.13
0.15
0.17
0.19
0.21
0.23
0.25
0.28
0.30
0.33
0.35
0.38
0.41
0.44
0.47
0.50
0.08
0.09
0.10
0.11
0.13
0.14
0.16
0.18
0.20
0.22
0.24
0.26
0.29
0.31
0.34
0.37
0.40
0.43
0.46
0.49
0.53
0.09
0.10
0.12
0.13
0.15
0.17
0.19
0.21
0.23
0.25
0.28
0.30
0.33
0.35
0.38
0.41
0.44
0.47
0.50
0.53
0.56
0.10
0.11
0.13
0.14
0.16
0.18
0.20
0.22
0.24
0.26
0.29
0.31
0.34
0.37
0.40
0.43
0.46
0.49
0.53
0.56
0.59
0.13
0.14
0.16
0.18
0.20
0.22
0.24
0.26
0.28
0.31
0.34
0.37
0.40
0.43
0.46
0.49
0.53
0.56
0.59
0.62
0.65
*.
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.
OPERATION
TABLE 31: MOTOR SHEAVE DATUM DIAMETERS
1VM50x7/8
(1-1/2, 2 & 3 HP Motor)
1VP56x1-1/8
(5 HP Motor)
SEQUENCE OF OPERATIONS OVERVIEW
Datum
Turns Open
Datum
Diameter
Turns Open
®
For the Predator series of units, the thermostat makes a cir-
Diameter
cuit between "R" and "Y1" for the first stage of cooling.
0
1/2
1
4.4
4.3
4.2
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
1
1-1/2
2
5.3
5.2
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.
5.1
1-1/2
2
2-1/2
3
5.0
4.9
When the "W1" call is sensed, the indoor air blower is ener-
gized following a specified heating delay.
2-1/2
3
3-1/2
4
4.8
4.7
If at any time a call for both heating and cooling are present,
the heating operation will be performed. If operating, the cool-
ing system is halted as with a completion of a call for cooling.
Heating always takes priority.
3-1/2
4
4-1/2
5
4.6
4.5
4-1/2
5
5-1/2
6
4.4
4.3
Unitary Products Group
33
035-17311-002-A-0803
pleted. 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 min-
imum position. If the enthalpy of the outdoor air is below the
set point of the enthalpy controller (previously determined),
"Y1" energizes the economizer. The dampers will modulate to
maintain a constant supply air temperature as monitored by
the discharge air sensor. If the outdoor air enthalpy is above
the set point, "Y1" energizes compressor #1.
COOLING SEQUENCE OF OPERATION
CONTINUOUS BLOWER
By setting the room thermostat fan switch to "ON," the supply
air blower will operate continuously.
INTERMITTENT BLOWER
With the room thermostat fan switch set to "AUTO" and the
system switch set to either the "AUTO" or "HEAT" settings,
the blower is energized whenever a cooling or heating opera-
tion is requested. The blower is energized after any specified
delay associated with the operation.
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 ener-
gize compressor #1. If the outdoor air is above the set point,
"Y2" will energize compressor #2.
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.
Once the thermostat has been satisfied, it will de-energize
“Y1” and “Y2”. If the compressors have satisfied their mini-
mum 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 posi-
tion. If the unit is in continues fan operation, the economizer
damper goes to the minimum position.
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 com-
pleted. 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.
ECONOMIZER WITH DUAL ENTHALPY SENSORS -
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, com-
pressor #1 is energized. If compressor #1 is active for first
stage cooling or the first compressor is locked-out, compres-
sor #2 is energized. In free-cooling mode, if the call for the
second stage of cooling continues for 20 minutes, compres-
sor #2 is energized, provided it has not been locked-out.
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 maxi-
mum operating efficiency.
ECONOMIZER WITH POWER EXHAUST -
A unit equipped with an economizer (single or dual enthalpy)
and a power exhaust operates as specified above with one
addition. The power exhaust motor is energized 45 seconds
after the actuator position exceeds the exhaust fan set point
on the economizer control. When the power exhaust is oper-
ating, the second stage of mechanical cooling will not oper-
ate. As always, the "R" to "G" connection provides minimum
position but does not provide power exhaust operation.
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-ener-
gized. Otherwise, the unit operates each cooling system until
the minimum run times for the compressors have been com-
pleted. Upon the final compressor de-energizing, the blower
is stopped following the elapse of the fan off delay for cooling.
MOTORIZED OUTDOOR AIR DAMPERS -
This system operation is the same as the units with no out-
door air options with one exception. When the "R" to "G" cir-
cuit 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.
* 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 com-
34
Unitary Products Group
035-17311-002-A-0803
COOLING OPERATION ERRORS
LOW AMBIENT COOLING
To determine when to operate in low ambient mode, the UCB
has a pair of terminals connected to a temperature-activated
switch set at 45ºF. When the low ambient switch is closed
and the thermostat is calling for cooling, the UCB will operate
in the low ambient mode.
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 compres-
sors.
HIGH-PRESSURE LIMIT SWITCH
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.
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.
Low ambient mode always begins with compressor opera-
tion. Compressor minimum run time may extend the minutes
of compressor operation. The defrost cycle will begin immedi-
ately following the elapse of the minimum run time.
Should a high-pressure switch open three times within two
hours of operation, the UCB will lock-out the associated com-
inactive, the condenser fans will be de-energized.
When operating in low ambient mode, the UCB will not lock-
out 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.
LOW-PRESSURE LIMIT SWITCH
The low-pressure limit switch is not monitored during the ini-
tial 30 seconds of a cooling system's operation. For the fol-
lowing 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 de-
energize the associated compressor, initiate the ASCD, and,
if the other compressor is idle, stop the condenser fans.
SAFETY CONTROLS
The unit control board monitors the following inputs for each
cooling system:
1. A suction line freezestat to protect against low evapora-
tor temperatures due to a low airflow or a low return air
temperature, (opens at 26 ± 5 °F and resets at 38 ± 5°F).
Once the low-pressure switch has been proven (closed dur-
ing 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 con-
denser fans.
2. A high-pressure switch to protect against excessive dis-
charge pressures due to a blocked condenser coil or a
condenser motor failure, (opens at 405 ± 10 psig or 440
± 10 psig depending on unit model).
3. A low-pressure switch to protect against loss of refriger-
ant charge, (opens at 7 ± 3 psig or 22 ± 5 psig).
If the call for cooling is still present at the conclusion of the
ASCD, the UCB will re-energize the halted compressor.
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.
Should a low-pressure switch open three times within one
hour of operation, the UCB will lock-out the associated com-
tive, the condenser fans will be de-energized.
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.
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.
COMPRESSOR PROTECTION
In addition to the external pressure snitches, the compres-
sors 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 Anti-
Short Cycle Delay (ASCD) is utilized to prevent operation of
Should a freezestat open three times within two hours of
operation, the UCB will lock-out the associated compressor
condenser fans will be de-energized.
Unitary Products Group
35
035-17311-002-A-0803
a compressor too soon after its previous run. Additionally, a
minimum run time is imposed any time a compressor is ener-
gized.
operates when a high temperature condition, caused by inad-
equate supply air flow occurs, thus shutting down the heater
and energizing the blower.
The ASCD is initiated on unit start-up and on any compressor
reset or lock-out.
TABLE 32: ELECTRIC HEAT LIMIT SETTING
FLASH CODES
LIMIT
UNIT (TONS)
VOLTAGE
HEATER kW
SWITCH
OPENS °F
The UCB will initiate a flash code associated with errors
within the system. Refer to UNIT CONTROL BOARD FLASH
CODES 37.
7.5
9
150
150
150
150
130
RESET
7.5, 10, 12.5
7.5, 10, 12.5
7.5, 10, 12.5
10, 12.5
18
24
34
54
Remove the call for cooling, by raising thermostat setting
higher than the conditioned space temperature. This resets
any pressure or freezestat flash codes.
380
ELECTRIC HEATING SEQUENCE OF OPERATIONS
The following sequence describes the operation of the elec-
tric heat section.
FLASH CODES
The UCB will initiate a flash code associated with errors
within the system. Refer to UNIT CONTROL BOARD FLASH
Two-stage heating:
a. Upon a call for first stage heat by the thermostat, the
heater relay (RA) will be energized. After completing
the specified fan on delay for heating, the UCB will
energize the blower motor. If the second stage of
heat is required, heater relay (RB) will be energized.
After completing the specified fan on delay for heat-
ing, the UCB will energize the blower motor.
RESET
Remove the call for heating by lowering the thermostat set-
ting lower than the conditioned space temperature.This
resets any flash codes.
ELECTRIC HEAT ANTICTPATOR SETPOINTS
b. The thermostat will cycle the electric heat to satisfy
the heating requirements of the conditioned space.
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
heat anticipator setting.
ELECTRIC HEATING OPERATION ERRORS
TEMPERATURE LIMIT
If the UCB senses zero volts from the high temperature limit,
the indoor blower motor is immediately energized.
TABLE 33: ELECTRIC HEAT ANTICIPATOR
SETPOINTS
This limit is monitored regardless of unit operation status, i.e.
the limit is monitored at all times.
SETTING, AMPS
If the temperature limit opens three times within one hour, it
will lock-on the indoor blower motor and a flash code is initi-
W1
W2
0.13
0.1
SAFETY CONTROLS
The UCB monitors the temperature limit switch of electric
heat units.
The control circuit includes the following safety controls:
LIMIT SWITCH (LS)
This control is located inside the heater compartment and is
set to open at the temperature indicated in the Electric Heat
36
Unitary Products Group
035-17311-002-A-0803
OPERATING INSTRUCTIONS
START-UP (COOLING)
1. Turn unit electrical power on.
PRESTART CHECK LIST
NOTE: Prior to each cooling season, the crankcase heaters
must be energized at least 10 hours before the sys-
tem is put into operation.
After installation has been completed:
1. Check the electrical supply voltage being supplied. Be
sure that it is the same as listed on the unit nameplate.
2. Set the room thermostat setting to lower than the room
temperature.
2. Set the room thermostat to the off position.
3. Turn unit electrical power on.
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.
4. Set the room thermostat fan switch to on.
5. Check indoor blower rotation.
POST START CHECK LIST
1. Verify proper system pressures for both circuits.
•
•
If blower rotation is in the wrong direction. Refer to
Phasing Section in general information section.
2. Measure the temperature drop across the evaporator
coil.
Check blower drive belt tension.
CHARGING THE UNIT
6. Check the unit supply air (CFM).
These units should be charged using the superheat method.
7. Measure evaporator fan motor's amp draw.
8. Set the room thermostat fan switch to off.
9. Turn unit electrical power off.
When charging each system, superheat data should be taken
at the compressor inlet.
TABLE 34: 7.5 TON STANDARD EFFICIENCY SUPERHEAT CHARGING
Superheat at Compressor Suction (°F)
Airflow = 3000 CFM
Outdoor
Temp (°F)
Indoor WB Temp (°F)
55
57
59
16.3
13.8
11.3
8.9
6.4
5.8
5.3
-
61
19.1
16.5
13.9
11.4
8.8
7.9
7.1
6.3
5.5
-
63
65
24.8
22.0
19.2
16.3
13.5
12.2
10.8
9.0
67
69
71
73
75
65
70
10.6
13.5
22.0
19.3
16.6
13.9
11.1
10.1
9.0
27.7
24.7
21.8
18.8
15.9
14.3
12.7
10.4
8.1
29.1
26.5
24.0
21.4
18.9
17.2
15.6
13.5
11.4
9.3
30.5
28.4
26.2
24.0
21.9
20.2
18.5
16.6
14.6
12.7
10.8
32.0
30.2
28.4
26.6
24.8
23.1
21.5
19.7
17.9
16.1
14.3
33.4
32.0
30.6
29.2
27.8
26.1
24.4
22.8
21.2
19.5
17.9
8.4
11.1
75
6.1
8.7
80
-
-
-
-
-
-
-
-
6.4
85
-
-
-
-
-
-
-
90
95
100
105
110
115
7.7
-
6.4
7.3
-
5.1
5.5
5.9
-
-
-
-
-
7.2
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37
035-17311-002-A-0803
TABLE 35: 10 TON STANDARD EFFICIENCY SUPERHEAT CHARGING
Superheat at Compressor Suction (°F)
Airflow = 4000 CFM
Outdoor
Temp (°F)
Indoor WB Temp (°F)
55
57
59
61
23.2
19.0
14.7
10.5
6.3
5.6
-
63
65
25.6
22.0
18.4
14.8
11.1
9.9
8.7
6.7
-
67
69
28.4
25.4
22.4
19.5
16.5
15.0
13.4
10.8
8.1
71
73
75
65
70
19.6
20.8
22.0
24.4
20.5
16.6
12.6
8.7
7.8
6.8
5.3
-
26.9
23.5
20.2
16.9
13.6
12.0
10.5
8.1
29.9
27.3
24.7
22.0
19.4
17.9
16.3
13.5
10.6
7.7
31.4
29.2
26.9
24.6
22.4
20.8
19.3
16.2
13.1
10.0
6.9
32.9
31.0
29.1
27.2
25.3
23.7
22.2
18.9
15.5
12.2
8.9
14.4
16.0
17.5
75
9.3
11.1
12.9
80
-
-
-
-
-
-
-
-
6.3
8.4
85
-
-
-
-
-
-
-
-
-
-
-
-
-
-
90
95
100
105
110
115
-
-
5.7
-
-
-
-
5.5
-
-
-
-
-
-
TABLE 36: 12.5 TON STANDARD EFFICIENCY SUPERHEAT CHARGING
Superheat at Compressor Suction (°F)
Airflow = 5000 CFM
Outdoor
Temp (°F)
Indoor WB Temp (°F)
55
33.6
29.6
25.6
21.6
17.6
11.6
5.6
-
57
34.2
30.4
26.6
22.8
19.0
13.4
7.8
6.1
-
59
34.7
31.1
27.5
24.0
20.4
15.2
10.0
7.8
61
35.3
31.9
28.5
25.1
21.7
16.9
12.1
9.4
63
65
36.4
33.4
30.5
27.5
24.5
20.5
16.5
12.8
9.1
67
69
71
73
75
65
70
35.9
32.7
29.5
26.3
23.1
18.7
14.3
11.1
7.9
37.0
34.2
31.4
28.6
25.9
22.3
18.7
14.5
10.3
6.1
37.3
34.7
32.2
29.7
27.2
24.3
21.3
17.5
13.8
10.0
6.2
37.5
35.3
33.0
30.8
28.5
26.3
24.0
20.6
17.2
13.8
10.4
37.8
35.8
33.8
31.8
29.9
28.3
26.7
23.7
20.7
17.6
14.6
38.0
36.3
34.6
32.9
31.2
30.3
29.4
26.7
24.1
21.5
18.8
75
80
85
90
95
100
105
110
115
-
5.5
6.7
-
-
-
-
-
5.4
-
-
-
-
-
-
-
38
Unitary Products Group
035-17311-002-A-0803
NORMAL MAINTENANCE
TROUBLESHOOTING
Troubleshooting of components may require open-
ing the electrical control box with the power con-
nected to the unit. Use extreme care when
working with live circuits! Check the unit name-
plate for the correct line voltage and set the voltme-
ter to the correct range before making any
connections with line terminals.
Prior to any of the following maintenance proce-
dures, shut off all power to the unit to prevent per-
sonal injury.
Periodic maintenance normally consists of chang-
ing or cleaning filters.
When not necessary, shut off all electric power to the
unit prior to any of the following maintenance proce-
dures so as to prevent personal injury.
GENERAL
FILTERS
Inspect once a month. Replace disposable or clean perma-
nent type as necessary. DO NOT replace permanent type
with disposable.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dan-
gerous operation which could cause injury to person
and/or damage unit components. Verify proper oper-
ation after servicing.
MOTORS
Indoor fan and outdoor fan motors are permanently lubricated
and require no maintenance.
OUTDOOR COIL
Dirt should not be allowed to accumulate on the outdoor coil
surface or other parts in the air circuit. Cleaning should be as
often as necessary to keep coil clean. Use a brush, vacuum
cleaner attachment, or other suitable means. If water is used
to clean coil, be sure power to the unit is shut off prior to
cleaning. Service access is provided in the front and rear
condenser compartment panels to provide improved access
PREDATOR® FLASH CODES
Various flash codes are utilized by the unit control board
(UCB) to aid 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 cor-
rectly. Do not confuse this with an error flash code. To prevent
confusion, a 1-flash, flash code is not used.
to the condenser coils.
Current alarms are flashed on the UCB LED. The alarm his-
tory can be checked by pressing and releasing the ALARMS
button on the UCB. The UCB will cycle through the last five
(5) alarms, most recent to oldest, separating each alarm flash
code by approximately 2 seconds.
Do not remove service panels or attempt to clean
the interior of the condenser section when the unit
is powered and/or operating. Shut off all power to
the unit prior to cleaning or maintenance of the
condenser section internals.
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
button once.
NOTE: Exercise care when cleaning the coil so that the coil
fins are not damaged. Do not permit the outdoor air
discharge to be obstructed by overhanging struc-
tures of shrubs.
Unitary Products Group
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035-17311-002-A-0803
TABLE 37: UNIT CONTROL BOARD FLASH CODES
Flash Code
Description
Control Failure - Replace Control
Normal Operation
On Steady
Heart Beat
1 Flash
Not Applicable
*
2 Flashes
3 Flashes
4 Flashes
5 Flashes
6 Flashes
7 Flashes
8 Flashes
Control waiting ASCD
HPS1 - Compressor Lock out
HPS2 - Compressor Lock out
LPS1 - Compressor Lock out
LPS2 - Compressor Lock out
FS1 - Compressor Lock out
FS2 - Compressor Lock out
Ignition Control Locked Out/
9 Flashes
10 Flashes
11 Flashes
Ignition Control Failure / Limit Switch Trip / No Jumper Plug in Heat Section
Compressors Locked Out On Low
*
Outdoor Air Temperature
Compressors Locked Out Because The
*
Economizer Is Using Free Cooling
12 Flashes
13 Flashes
14 Flashes
OFF
Fan Overload Switch Trip - Not Applicable On This Unit *
EEPROM Storage Failure (Control Failure)
No Power or Control Failure
*.
These flash codes do not represent alarms.
Monitored
No
Loss of
Call for
Heating?
No
Yes
No
Call for
Heating?
Systems
Programming?
Yes
Heat Off
Problem?
Yes
Yes
No
Program
Unit
Control
Board
Call for 2nd
Stage
Cooling
Call for
Heat
Trip/Failure
No
Yes
Energize ID
Call for
First
Monitor
Blower Motor
Cooling?
Stage?
Yes
No
Yes
No
Call for 1st
Stage
Cooling
No
Yes
Turn off ID
Blower Motor
Fan on
>30 secs?
Fan off
>10 secs?
Yes
Yes
No
No
No
Yes
Lossof Call
for ID Blower?
Call for
ID Blower?
Loss of Call
for Cooling?
Cool Off
FIGURE 24 - BASIC TROUBLESHOOTING FLOWCHART
40
Unitary Products Group
035-17311-002-A-0803
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):
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 oper-
ate. If both stages of cooling are requested simulta-
neously 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.
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.
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 contac-
tor and the compressor.
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.
3. If M1 is pulled in and voltage is supplied at M1, lightly
touch the compressor housing. If it is hot, the compres-
sor may be off on inherent protection. Cancel any calls
for cooling and wait for the internal overload to reset.
Test again when cool.
5. 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.
4. 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.
6. 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.
5. Failing the above, if voltage is supplied at M1, M1 is
pulled in, and the compressor still does not operate,
replace the compressor.
7. 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.
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.
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 follow-
ing:
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:
a. Proper operation of the room thermostat (contact
between R and G with the fan switch in the ON posi-
tion and in the AUTO position during operation
calls).
a. 24 volts at the thermostat Y1 terminal
b. Proper wiring between the room thermostat and the
UCB, i.e. Y1 to Y1, Y2 to Y2, and
b. Proper wiring between the room thermostat and the
UCB, and
c. Loose wiring from the room thermostat to the UCB
8. If 24 volts is present at the UCB Y1 terminal, the com-
pressor 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 termi-
nals.
c. Loose wiring from the room thermostat to the UCB
9. 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 con-
nected to the G terminal of the UCB, and for loose wir-
ing.
10. If the thermostat and UCB are properly wired, replace
the UCB.
9. If 24 volts is present at the UCB Y1 terminal and none of
the protection switches have opened, the UCB may have
Unitary Products Group
41
035-17311-002-A-0803
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.
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” posi-
tion):
NOTE: While the above step will reset any lockouts, com-
pressor #1 may be held off for the ASCD. See the
next step.
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, fol-
lowing a short delay, compressor #1 will be energized
unless it is locked out. Typically, compressor #2 is ener-
gized only during free cooling if the call for the second
stage of cooling persists for 20 minutes.
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.
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 sec-
onds to prevent a power surge. If after the delay com-
pressor #2 does not energize on a second stage call for
cooling, check for line voltage at the compressor contac-
tor, M2, and that the contactor is pulled in. Check for
loose wiring between the contactor and the compressor.
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 wir-
ing. If 24 volts is not present at the Y1 “OUT” terminal,
the UCB must be replaced.
3. If M2 is pulled in and voltage is supplied at M2, lightly
touch the compressor housing. If it is hot, the compres-
sor may be off on inherent protection. Cancel any calls
for cooling and wait for the internal overload to reset.
Test again when cool.
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.
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.
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” termi-
nal. 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 pro-
viding 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 ener-
gizes, there is a fault in the economizer wiring or the
economizer control.
6. If 24 volts is not present at M2, check for 24 volts at the
UCB terminal, C2. If 24 volts are present, check for
loose wiring between C2 and the compressor contactor.
7. If 24 volts is not present at the C2 terminal, check for 24
volts from the room thermostat at the UCB Y2 terminal.
If 24 volts is not present from the room thermostat, check
for the following:
a. 24 volts at the thermostat Y2 terminal
b. Proper wiring between the room thermostat and the
UCB, i.e. Y1 to Y1, Y2 to Y2, and
c. Loose wiring from the room thermostat to the UCB
8. If 24 volts is present at the UCB Y2 terminal, the com-
pressor may be out due to an open high-pressure switch,
low-pressure switch, or freezestat. Check for 24 volts at
the HPS2, LPS2, and FS2 terminals of the UCB. If a
switch has opened, there should be a voltage potential
between the UCB terminals, e.g. if LPS2 has opened,
there will be 24 volts of potential between the LPS2 ter-
minals.
14. The UCB can be programmed to lock out compressor
operation during free cooling and in low ambient condi-
tions. These options are not enabled by default. Local
York distributors can test the UCB for this programming.
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 termi-
nals. If the compressor engages, the UCB has faulted.
42
Unitary Products Group
035-17311-002-A-0803
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,
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 cool-
ing, i.e. a loss if 24 volts at the Y1 terminal.
remove any call for cooling at the thermostat or by dis-
connecting 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, com-
pressor #1 will be held off for the ASCD, and com-
pressor #2 may be held off for a portion of the
ASCD. See the next step.
8. If 24 volts are present at the UCB Y1 terminal, the com-
pressor 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 termi-
nals.
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.
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 compres-
sor lock outs.
11. The UCB can be programmed to lock out compressor
operation during free cooling and in low ambient condi-
tions. These options are not enabled by default. Local
York distributors can test the UCB for this programming.
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 termi-
nals. If the compressor engages, the UCB has faulted.
NOTE: While the above step will reset any lock outs, com-
pressor #2 will be held off for the ASCD, and com-
pressor #1 may be held off for a portion of the
ASCD. See the next step.
13. If none of the above correct the error, replace the UCB.
On a call for cooling, the supply air blower motor and com-
pressor #2 are operating but compressor #1 is not (the room
thermostat fan switch is in the “AUTO” position):
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.
1. Compressor #2 is energized in place of compressor #1
when compressor #1 is unavailable for cooling calls.
Check the UCB for alarms indicating that compressor #1
is locked out. Press and release the ALARMS button if
the LED is not flashing an alarm.
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 wir-
ing. If 24 volts is not present at the Y1 “OUT” terminal,
the UCB must be replaced.
2. Check for line voltage at the compressor contactor, M1,
and that the contactor is pulled in. Check for loose wiring
between the contactor and the compressor.
3. If M1 is pulled in and voltage is supplied at M1, lightly
touch the compressor housing. If it is hot, the compres-
sor may be off on inherent protection. Cancel any calls
for cooling and wait for the internal overload to reset.
Test again when cool.
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.
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.
For units with economizers:If 24 volts is present at the
Y1 “OUT” terminal, check for 24 volts at the Y1 “ECON”
Unitary Products Group
43
terminal. If 24 volts is not present, check for loose wiring
from the Y1 “OUT” terminal to the Mate-N-Lock plug, a
poor connection between the UCB and economizer
Mate-N-Lock plugs, loose wiring from the Mate-N-Lock
plug to the economizer, back to the Mate-N-Lock plug,
and from the Mate-N-Lock plug to the Y1 “ECON”
terminal. The economizer control may have faulted and
is not returning the 24 volts to the Y1 “ECON” terminal
even though the economizer is not providing free
cooling. To test the economizer control, disconnect the
Mate-N-Locks and jumper between the WHITE and
YELLOW wires of the UCB’s Mate-N-Lock plug.
13. The UCB can be programmed to lock out compressor
operation during free cooling and in low ambient condi-
tions. These options are not enabled by default. They
can be checked by local York distributors.
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 termi-
nals. 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.
035-17311-002-A-0803
Copyright © by Unitary Products Group 2003. All rights reserved.
Supersedes: 035-17311-001-A-1202
Unitary
Products
Group
5005
York
Drive
Norman
OK
73069
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