Carrier 48LJD User Manual
48LJE/LJF004
48L J D/L J E/L J F005-007
HEATING & COOLING
Single-Package Rooftop Heating/Cooling Units
Installation, Start-Up, and Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS ...
INSTALLATION .......................................................1
Step 1 — Provide Unit Support
• ROOF CURB
• SLAB MOUNT
Step 2 — Field Fabricate Ductwork .........................
Step 3 — Install External Trap for
Condensate Drain ..................................................
Step 4 — Rig and Place Unit ....................................
• POSITIONING
Step 5 — Install Flue Hood........................................
Step 6 — Install Gas Piping
Step 7 — Make Electrical Connections
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
• HEAT ANTICIPATOR SETTINGS
Step 8 - Make Outdoor-Air Adjustments and
Install Outdoor-Air Hood
• MANUAL OUTDOOR-AIR DAMPER
• TWO-POSITION DAMPER
• OPTIONAL ECONOMIZER
Step 9 — Adjust Evaporator-Fan Speed..................13
• DIRECT DRIVE MOTORS
• BELT DRIVE MOTORS
START-UP
................
................................
.....................................
...................
.......................................
SERVICE ..................
TROUBLESHOOTING
19
1
10
20,21
21-25
26-31
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment
can be hazardous due to system pressure and electrical com
ponents. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance func
tions of cleaning coils and filters and replacing filters. All
other operations should be performed by trained service per
sonnel. When working on air-conditioning equipment, ob
serve precautions in the literature, tags and labels attached
to the unit, and other safety precautions that apply.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations. Have
fire extinguishers available for all brazing operations.
A WARNING
Disconnect gas piping from unit when leak
testing at pressure greater than V2 psig. Pres
sures greater than ’/2 psig will cause gas valve
damage resulting in hazardous condition. If
gas valve is subjected to pressure greater than
■ /2 psig, it must be replaced before use. When
pressure testing field-supplied gas piping at
i
pressures of V2 psig or less, a unit connected
to such piping must be isolated by manually
closing the gas valve(s).
Before performing service or maintenance operations
on unit, turn off main power switch to unit. Electrical
shock could cause personal injury.
Unit is shipped in the vertical discharge configuration.
To convert to horizontal configuration, remove screws from
side duct opening covers and remove covers. Using the same
screws, install covers on vertical duct openings with the
insulation-side down. Seals around duct openings must be
tight. See Fig. 1.
IMPORTANT: An external filter kit MUST be used
or the filters MUST be field-installed outside the unit
on horizontal discharge applications with optional econ
omizer. Otherwise, the economizer must be partially
removed to access the filters. The area of the fieldinstalled filters should be equal to the area of the factoryinstalled filters.
Step 1 — Provide Unit Support
ROOF CURB — Assemble and install accessory roof curb
in accordance with instructions shipped with curb. See
Fig. 2. Install insulation, cant strips, roofing felt, and counter
flashing as shown. Ductwork must be attached to curb, not
to the unit. If gas, electric power, or control power is to be
routed through the curb, attach the accessory thm-the-curb
service connection plates to the roof curb in accordance with
the accessory installation instmctions. Connection plates must
be installed before unit can be set on roof curb.
IMPORTANT: The gasketing of the unit to the roof
curb is critical for a watertight seal. Install gasket sup
plied with the roof curb as shown in Fig. 2. Improp
erly applied gasket can result in air leaks and poor
unit performance.
Curb should be level. Unit leveling tolerances are shown
in Fig. 3. This is necessary for unit drain to function prop
erly. Refer to Accessory Roof Curb Installation Instruc
tions for additional information as required.
SLAB MOUNT (Horizontal Units Only) — Provide a level
concrete slab that extends a minimum of 6 in. beyond unit
cabinet. Install a gravel apron in front of condenser coil air
inlet to prevent grass and foliage from obstructing airflow.
NOTE: Horizontal units may be installed on a roof curb if
required.
Step 2 — Field Fabricate Ductwork — Secure all
ducts to roof curb and building structure on vertical units.
Do not connect ductwork to unit. For horizontal applica
tions, field-supplied flanges should be attached to horizon
tal discharge openings and all ductwork should be secured
to the flanges. Insulate and weatherproof all external duct
work, joints, and roof openings with counter flashing andmastic in accordance with applicable codes.
A WARNING
INSTALLATION
Book|1 |4 PC 111 Catalog No. 564-987 Printed in U S A Form 48LJ-7SI Pg 1 4-93 Replaces: 48LJ-5SI
Tab la 6a
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obiigations.
Ducts passing through an unconditioned space must be
insulated and covered with a vapor barrier.
If a plenum return is used on a vertical unit, the return
should be ducted through the roof deck to comply with ap
plicable fire codes.
A minimum clearance is not required around ductwork.
Cabinet return air static shall not exceed —.35 in. wg with
economizer or — .45 in. wg without economizer.
Step 3 — Install External Trap for Condensate
Drain — All units must have an external trap added for
condensate drainage. A y4-in. NPT connection is located
on the side of the unit. Use a trap at least 4-in. deep and
protect against freeze-up.
If drain line is run to a drain, pitch line away from unit at
1 in. per 10 ft of run. Do not use a pipe size smaller than
the unit connection. See Fig. 4 for more details.
Step 4 — Rig and Place Unit — Inspect unit for
transportation damage. File any claim with transportation
agency. Keep unit upright and do not drop. Spreader bars
are not required if top crating is left on unit. Rollers may be
used to move unit across a roof. Level by using unit frame
as a reference. See Table 1 and Fig. 5 for additional infor
mation. Operating weight is shown in Table 1 and Fig. 5.
Lifting holes are provided in base rails as shown in
Fig. 6. Refer to rigging instructions on unit.
A CAUTION
I
______
POSITIONING — Maintain clearance around and above
unit to provide minimum distance from combustible mate
rials, proper airflow, and service access. See Fig. 6. A prop
All panels must be in place when rigging.
_________
erly positioned unit will have the following clearances
between unit and roof curb: 'A-in. clearance between roof
curb and base rails on each side and front of unit; U/32-in.
clearance between roof curb and rear of unit. (See Fig. 2,
section C-C.)
Do not install unit in an indoor location. Do not locate
unit air inlets near exhaust vents or other sources of con
taminated air.
Be sure that unit is installed such that snow will not block
the combustion intake or flue outlet.
Unit may be installed directly on wood flooring or on
Class A, B, or C roof-covering material when roof curb is
used.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
Locate mechanical draft system flue assembly at least
48 in. from any opening through which combustion prod
ucts could enter the building, and at least 48 in. from an
adjacent building. When unit is located adjacent to public
walkways, flue assembly must be at least 7 ft above grade.
Flue vent discharge must have a minimum horizontal clear
ance of 4 ft from electric and gas meters, gas regulators,
and gas relief equipment.
Flue gas can deteriorate building materials. Orient unit
such that flue gas will not affect building materials.
Adequate combustion-air space must be provided for proper
operation of this equipment. Be sure that installation
complies with all local codes and Section 5.3, Air for Com
bustion and Ventilation, NFGC (National Fuel Gas Code),
|
ANSI (American National Standards Institute) Z223.1-
1984 and addendum Z223.la-1987. In Canada, instal
lation must be in accordance with the CAN LB 149.1 and
CAN1.B149.2 installation codes for gas burning
appliances.
c
—!J------------------
—1
-------------------
ROOF CURB
ACCESSORY
50DJ900771
- 1
50DJ900781
A
1 '-2”
[356]
2"-0'
[610]
UNIT SIZE
48LJE/LJF004
48UD/LJE/UF005-007
NOTES:
1. Roof curb accessory is shipped
unassembled
2. Insulated panels.
3 Dimensions in [ ] are in millimeters
4. Roof Curb: galvanized steel
5 Attach ductwork to curb (Flanges of
duct rest on curb.)
6 Service clearance is 4 ft on each side.
Direction of airflow
UNIT SIZE
48LJE/LJF004
48LJD/LJE/LJF005-007
“E”
GAS
%" [19] NPT
“F”
POWER
%" [19] NPT 3/4" [19] NPT
“G”
CONTROL
CONNECTOR
PKG ACY
50DJ900791
Fig. 2 — Roof Curb Dimensions
MAXIMUM ALLOWABLE
DIFFERENCE (in.)
/■
A-B
0.5 1.0 1.0
B-C
A-C
Fig. 3 — Unit Leveling Tolerances
NOTE: Trap should be deep enough to offset maximum unit static
difference, A 4-in. trap is recommended.
PLACE ALL SEAL STRIPS
IN PLACE BEFORE PLACING
UNIT ON ROOF CURB.
SEE DETAIL DUCT END
"A"
Fig. 4 — External Trap Condensate Drain
DETAIL "A"
NOTES:
1. Dimensions in ( ) are in miilimeters
2 Hook rigging shackles through holes in base rail, as shown in de
tail “A.” Holes in base rails are centered around the unit center of
gravity Use wooden top skid when rigging to prevent rigging straps
from damaging unit
MAX
UNIT
48LJE/LJF004 530 240
48LJD/LJE/LJF005 540 245
48LJD/LJE/LJF006
48LJD/LJE/LJF007 615 279
WEIGHT
Lb
560 254
Kg
Fig. 5 — Rigging Details
3 Unit weights do not include economizer. See Table 1 for
A B
in.
73.69
mm
1872
economizer weights.
All panels must be in place when rigging.
in.
35.5
mm in.
902
A CAUTION
C
mm
32.52 826
Table 1 — Physical Data
BASE UNIT 48
NOMINAL CAPACITY (tons)
OPERATING WEIGHT (lb)
Unit
Economizer
Roof Curb
COMPRESSOR
Quantity
Oil (oz)
REFRIGERANT TYPE
Operating Charge (Ib-oz) 6-0
CONDENSER FAN Propeiier Type
Quantity...Diameter (in.) 1 ..26.0
Nominal Cfm
Motor Hp...Rpm
CONDENSER COIL
Rows...Fins/in.
Total Face Area (sq ft)
EVAPORATOR FAN
Size (in.)
Type Drive
Nominal Cfm
Maximum Continuous Bhp
Motor Frame
Nominal Rpm High/Low
Fan Rpm Range
Motor Bearing Type
Maximum Fan Rpm
Motor Pulley Pitch Diameter A/B (in.)
Fan Pulley Pitch Diameter (in.)
Belt — Type...Length (in.)
Pulley Center Line Distance (in.)
Speed Change Per Full Turn of
Moveable Pulley Flange (rpm)
Movable Pulley Maximum Full Turns
From Closed Position
Factory Setting — Full Turns Open
Factory Speed Setting (rpm)
Fan Shaft Diameter at Pulley (in.) —
EVAPORATOR COIL
Rows...Fins/in.
Total Face Area (sq ft)
FURNACE SECTION
Burner Orifice Diameter (in. ...drill size)*
Natural Gas — Std
Liquid Propane — Alt
Thermostat Heat Anticipator Setting (amps)
208/230/460 V
First Stage
Second Stage
Gas Input
First Stage
Second Stage
Efficiency (Steady State) (%)
Temperature Rise Range
Manifold Pressure (in. wg)
Natural Gas — Std
Liquid Propane — Alt
Field Gas Connection Size (in.)
HIGH-PRESSURE SWITCH (psig)t
Standard Compressor Internal Relief
Cutout
Reset (Auto.)
LOSS-OF-CHARGE/LOW-PRESSURE SWITCHf
(liquid Line) (psig)
Cutout
Reset (Auto.)
FREEZE PROTECTION THERMOSTATf
Opens (F)
Closes (F)
OUTDOOR-AIR INLET SCREENS
Qty...Size (in.)
RETURN-AIR FILTERS
Qty...Size (in.)
Std
Alt Direct
Std
Alt 81
Std
Alt 48
Std
Ait 1080/970
Std
Alt
Std
Alt
Std
Alt
Std
Alt
Std
Alt
Std
Alt
Std
Alt
Std — —
Alt
std — —
Alt
LJE/LJF004
3
530
34
115
Reciprocating
1
55
4600
Уз 850
1.. 17
12 25
10 X 10
Direct
1200
34
48
860/845
—
—
Baii
2100
—
—
— —
—
—
—
—
—
— —
—
—
—
—
—
2. 15 2.. 15
4 17 55 55
113 33
089 43
.14
-/14
74,000/82,000
-/115,000
80
25-55/55-85
35
3.5
.5
LEGEND
Bhp — Brake Horsepower
*The 48LJD005-007 and 48LJE004 (74,000 Btuh) units have 2 burners The 48LJE005-007 and 48LJF004 (115,000 Btuh) units and
the 48LJF005-007 (150,000 Btuh) units have 3 burners
flndioates a FlOP (Factory-instalied Option) that requires a control kit.
LJD/LJE/LJF005
4
540
34
115 115
LJD/LJE/LJF006
560 615
Scroil
1 1
55
7-6 8-3 9-12
1 ..26.0 1...26.0
4600
Уз...850
Enhanced Copper Tubes, Aiuminum Lanced Fins
2.. 17
12.25
10 X 10
Direct
Beit
1600
.81
1 20
48
56
1080/970
—
_
970-1310
Bali
2100
—
1 9/2 9
3.5
— A 39
A 31
—
14 7-15 5
68
—
5
3
1110
5/8 У2
Enhanced Copper Tubes, Aluminum Doubie Wavy Fins, Acutroi'“ Feed Device
113. 33/113 33/129 30 113. 33/113 33/129. 30
.089.. 43/089 .43/.102 .38 089 43/089 43/102 38
.14 14
-/-/14
74,000/115,000/120,000 74,000/115,000/120,000
-/-/150,000
80 80
25-55/35-65/50-80
35
3.5
.5
R-22
Centrifugai Type
-/-/150,000
25-55/35-65/50-80
625
428
320
7 ± 3
22 ± 7
30 ± 5
45 ± 5
Cieanabie
1
..20 X 24 X 1
Throwaway
2.. 16 X 25 X 2
4100
У3...850 Уз . 850
2.. 17 2.. 17
12.25
10 X 10
Beit
2000
1 80
900-1300
Baii Bail
2100
2 4/3 4
14 7-15.5
1060 1230
3.. 15 4...15
-/-/14
5 6
34 34
115
Reciprocating
LJD/LJE/LJF007
70 65
1 . 26.0
4i00
12.25
10 X 10
— —
—
56
—
—
—
—
—
4.5 45
— —
— —
— —
80
—
5
_
3 3
— —
Beit
2400
2 40
1070-1460
2100
2.8/3.8
A 39
14 7-15 5
—
113 33/113 33/.129.30
089 43/089 43/102 38
-/-/14
74,000/115,000/120,000
-/-/150,000
25-55/35-65/50-80
35
3.5 3.5
.5 .5
—
56
—
—
—
—
79
—
—
Ув
5.5
3.5
1
—
5
14
80
STD UNIT
UNIT
48LJE/LJF004 530
48LJD/LJE/UF005 540
48UD/UE/UF006
48UD/UE/UF007 615 279
WEIGHT
Lb
560
Kg
240
245
254
ECONOMIZER
WEIGHT
Lb
Kg
34
15.4
34 15.4
34 154 110
34 154 120
CORNER
WEIGHT (A)
Lb
Kg
104
47.2 97
106 48 1
49.9
54.4
CORNER
WEIGHT (B)
Lb
Kg
44.0
98 44.5
102 46 3
112 50.8
RIGHT SIDE
'Indicates horizontal center of gravity
flndicates vertical center of gravity
NOTES:
1. Dimensions in [ ] are in millimeters.
Center of Gravity.
3 Direction of airflow
4. On vertical discharge units, ductwork is to be
attached to accessoiy roof curb only. For hor
izontal discharge units, field-supplied flanges
should be attached to horizontal discharge
openings and all ductwork should be at
tached to the flanges.
5 Minimum clearances are as follows (local codes
or jurisdiction may prevail):
NOTE: When installing these units, use the
maximum clearance stated for your application
a Between unit, flue side, and combustible
surfaces, 36 inches. (Minimum clearance
to combustibles, flue side, is 18 in for units
with accessory flue discharge deflector.)
b. Bottom to combustible surfaces (when not
using curb), 0 in. for LJD,LJE units and
1 in. for LJF units.
c. Condenser coil for proper airflow, 36-in one
side, 12 in the other The side getting the
greater clearance is optional
d. Overhead, 60 in to assure proper con
denser fan operation
e. Horizontal supply and return end, 0 inches
f Between units, control box side, 42 in per
NEC (National Electrical Code),
g Between unit and ungrounded surfaces, con
trol box side, 36 in. per NEC.
h. Between unit and block or concrete walls
and other grounded surfaces, control box
side, 42 in. per NEC.
6. With the exception of the clearance for the
condenser coil and combustion side, as stated
in Notes 5a, b, and c, a removable fence or
barricade requires no clearance
7 Units may be instailed on combustible floors
made from wood or class A, B, or C roof cov
ering material
UNIT
48LJE/LJF004
48LJD/LJE/LJF005 162
48LJD/LJE/LJF006 168
48LJD/LJE/LJF007
WEIGHT (C)
Lb
159
185
FRONT
CORNER
Kg
72.1 171
73.5 174 78.9
76.2
83.9 198
CORNER
WEIGHT (D)
Lb
77.6
81.6
180
89.8
Kg
Connection Sizes
1%" Dia [351 Field Power Supply Hole
A
2" Dia [50.51 Power Supply Knockout
B
2¥i6" Dia [551 Charging-Port Hole
c
%" [221 Field Control Wiring Hole
D
%" Condensate Drain
E
V2"-14 NPT Gas Connection
F
LEFT SIDE
Fig. 6 — Base Unit Dimensions
FRONT
O'-O 3/B
r’OJ
L
i'
Step 5 — Install Flue Hood — Flue hood and screen
are shipped screwed to the burner compartment access panel.
Remove from shipping location and using screws provided,
install flue hood and screen in location shown in Fig. 7.
Step 6 — Install Gas Piping — Unit is equipped for
use with type of gas shown on nameplate. Refer to local
building codes, or in the absence of local codes, to ANSI
Z223.1-1984 and addendum Z223-1A-1987 entitled Na
tional Fuel Gas Code. In Canada, installation must be in
accordance with the CANl.B 149.1 and CAN1.B149.2 in
stallation codes for gas burning appliances.
For natural gas applications, gas pressure at unit gas con
nection must not be less than 4 in. wg or greater than
13.0 in. wg while unit is operating. On 48LJ005,006,007
high heat units, the gas pressure at unit gas connection must
not be less than 5 in. wg or greater than 13 in. wg while the
unit is operating. For propane applications, the gas pressure
must not be less than 5 in. wg or greater than 13 in. wg at
the unit connection.
Size gas supply piping for 0.5 in. wg maximum pressure
drop. Do not use supply pipe smaller than unit gas connec
tion. Support gas piping as shown in the table in Fig. 8. For
example, a %-in. gas pipe must have one field-fabricated
support beam every 8 ft. Therefore, an 18-ft long gas pipe
would have a minimum of 2 support beams, a 48-ft long
pipe would have a minimum of 6 support beams.
See Fig. 8 for typical pipe guide and locations of exter
nal manual main shutoff valve.
9” MINIMUM CLEARANCE
FOR PANEL REMOVAL
MANUAL GAS GAS
I SHUTOFF VALVE* REGUUTOR*
48" MINIMUM -
DRIP LEG PER NFGC
ROOF CURB
FROM GAS METER
LEGEND
NFGC — National Fuel Gas Code
"Field supplied.
NOTE: Follow all local codes
FIELD-FABRICATED*
SUPPORT
SPACING OF SUPPORTS
STEEL PIPE
NOMINAL
DIAMETER
(In.)
%
*/4 or 1 8
1’/4 or larger 10
Fig. 8 — Gas Piping Guide (With Accessory
Thru-the-Curb Service Connections)
7
X
DIMENSIONS
(feet)
6
Step 7 — Make Electrical Connections
A WARNING
Unit cabinet must have an uninterrupted, unbroken elec
trical ground to minimize the possibility of personal in
jury if an electrical fault should occur. This ground may
consist of electrical wire connected to unit ground lug
in control compartment, or conduit approved for elec
trical ground when installed in accordance with NEC
(National Electrical Code), ANSI/NFPA (National Fire
Protection Association), latest edition, and local elec
trical codes. Do not use gas piping as an electrical ground.
Failure to follow this warning could result in the in
staller being liable for personal injury of others.
FIELD POWER SUPPLY - All units except 208/230-v
units are factory wired for the voltage shown on the name
plate. If the 208/230-v unit is to be connected to a 208-v
power supply, the transformer must be rewired by moving
the black wire from the 230-v orange wire on the trans
former and connecting it to the 200-v red wire from
the transformer. The end of the orange wire must then be
insulated.
Refer to unit label diagram for additional information.
Wiring leads are provided for field service. Use copper con
ductors only when splice connectors are used.
When installing units, provide a disconnect per NEC.
All field wiring must comply with NEC and local require
ments. In Canada, electrical connections must be in accor
dance with CSA (Canadian Standards Association) C22.1
Canadian Electrical Code Part 1.
Install conduit through side panel openings indicated in
Fig. 6. Route power lines through connector to terminal
connections as shown in Fig. 9.
Voltage to compressor terminals during operation must
be within voltage range indicated on unit nameplate (also
see Table 2). On 3-phase units, voltages between phases
must be balanced within 2% and the current within 10%.
Use the formula shown in the legend for Table 2, Note 2 to
determine the percent voltage imbalance. Operation on im
proper line voltage or excessive phase imbalance consti
tutes abuse and may cause damage to electrical components.
Such operation would invalidate any applicable Carrier
warranty.
FIELD CONTROL WIRING - Install a Carrier-approved
accessory thermostat assembly according to installation in
structions included with the accessory. Locate thermostat
assembly on a solid wall in the conditioned space to sense
average temperature in accordance with thermostat instal
lation instmctions. Connect thermostat wires to terminal board.
Route thermostat cable or equivalent single leads of col
ored wire from subbase terminals through connector on unit
to low-voltage connections (shown in Fig. 10).
Connect thermostat wires to matching screw terminals of
low-voltage connection board. See Fig. 10.
NOTE; For wire runs up 50 ft, use no. 18 AWG (American
Wire Gage) insulated wire (35 C minimum). For 50 to
75 ft, use no. 16 AWG insulated wire (35 C minimum).
For over 75 ft, use no. 14 AWG insulated wire (35 C min
imum). All wire larger than no. 18 AWG cannot be directly
connected to the thermostat and will require a junction box
and splice at the thermostat.
Pass the control wires through the hole provided in the
end panel; then feed wires through the raceway built into
the comer post to the 24-v barrier located on the left side of
the control box. See Fig. 11. The barrier provides the UL
(Underwriters’ Laboratories) required clearance between highand low-voltage wiring.
Table 2 — Electrical Data
VOLTAGE
UNIT
48LJE/LJF004
(3 Tons)
48LJD/LJE/LJF
005
(4 Tons)
48LJD/LJE/LJF
006
(5 Tons)
48LJD/LJE/LJF
007
(6 Tons)
IMPORTANT: Optional, alternate evaporator-fan motor and drive are not
available for 48LJ006,007 units. Contact your local Carrier representative
for more information about field-installed motors
COMPR
FLA
HACR
IFM
LRA
MCA
MOCP
OFM
RLA
*Fuse or HACR circuit breaker
NOTES:
1. In compliance with NEC (National Electrical Code) requirements for multi
motor and combination load equipment (refer to NEC Articles 430 and 440),
the overcurrent protective device for the unit shali be fuse or HACR breaker
Canadian Standards Association (CSA) units may be fuse or circuit breaker
2 Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalanoe in supply voltage is greater
than 2% Use the following formula to determine the percent voltage im
balance.
% Voltage Imbalance
100 X
NOMINAL
V-PH-HZ
208/230-1-60
208/230-3-60
460-3-60
575-3-60
208/230-1-60
208/230-3-60
460-3-60
575-3-60
230-1-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
LEGEND
Compressor
Full Load Amps
Heating, Air Conditioning and Refrigeration
Indoor (Evaporator) Fan Motor
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
Outdoor (Condenser) Fan Motor
Rated Load Amps
max voltage deviation from average voltage
average voltage
IFM
TYPE
Std
Alt 3.8 28.1/28 1
Std
Alt 38
Std
Alt 1.9 105
Std
Alt
Std
Alt 57 38.6/38 6
Std
Alt
Std
Alt 2.8 13.5
Std
Alt
Std
Std
RANGE
Min Max RLA
187 254 179
187 254 11 2
414
508
632 45
518
187 254 24 8
187 254 157
414
508 78
632 55
518
187 254 27.8
187
254
414 508 96
518 632 83
187 254 21 9
414 508
518 632 96
COMPR
(each)
6 1
19.2
104
OFM
LRA FLA FLA FLA
93 1 9
80 1 9
40 1 0
29 1 9
127 1 9
99 1.9
50 1 0
40 1.9
135 1 9 85 .57
105 1 9
55 1 0
45 1 9
142 1 9 5.8 57 35.1/35.1
72
1 0
58 5 1 9
11 0
FAN MOTOR
2.8
28
1 5
2.8
38 7.9
38
3.8
5.7 27 2/27.2
1 9
38
5.7 9.9
8.5 .57
4.5
85
2.6
Example: Supply voltage is 460-3-60.
ABC BC = 464v
NOTE: The 575-v units are CSA only
Determine maximum deviation from average voltage
(AB) 457 - 452 = 5 V
(BC) 464 - 457 = 7 V
(AC) 457 - 455 = 2 V
Maximum deviation is 7 v.
Determine % voltage imbalance
% Voltage Imbalance = 100 x
This amount of phase imbalance is satisfactory as it is below the maximum
allowable 2%
IMPORTANT: If the supply voltage phase imbalance is more than 2%,
contact your local electric utility company immediately
57
.57
30
57
57
57
.30
57
30
.57
30
57
COMBUSTION
IFM
POWER SUPPLY
MCA
27 1/27 1
18 7/18.7 25/25 18/18
19 7/19.7
101
7.5
36 7/36.7
25 3/25.3
126
9.2
45 2 60
34.4/34.4 40/40 34/34
17.5
14.5
16.6
172
AB = 452V
AC = 455V
Average Voltage
-----------
= 1 53%
DISCONNECT SIZE
MOCP* FLA
35/35
35/35 27/27
25/25 19/19
15
15 10
15 7
15
45/45
45/45 37/37
30/30 25/25 113/113
35/35 27/27 116/116
15
26/26
10
8
35/35
12
20 13
15
15
9
10
44 164
20 17 81
20 14
40/40 34/34 188/188
20 16
20 17 81
452 4- 464 4- 455
_ 1371
3
= 457
7
457
LRA
105/105
107/107
92/92
94/94
46
46
34
34
141/141
144/144
56
58
45
47
134/134
57
95
c
COMP
EQUIP
GND
IFC
NEC
LEGEND
Contactor
Compressor
Equipment
Ground
Indoor (Evaporator) Fan Contactor
National Electrical Code
TO
c
Fig. 9 — Power Wiring Connections
LEGEND
AHA
CC
TC
NOTE: Connect Y2 when unit is equipped with an economizer.
Adjustable Heat
Anticipator
Cooling Compensator
Thermostat-Cooling
TH — Thermostat-Heating
---------
Field Wiring
----------
Factory Wiring
Fig. 10 - Low-Voitage Connections
208 / 230-3-60
460-3-60
(SIZES 004-006)
575-3-60
(SIZES 004-007)
CONNECTION BOARD LED
RACEWAY
HOLE
IN
END
PANEL--(HIDDENV
LED — Light-Emitting Diode
FIELD POWER SUPPLY
Fig. 11 — Fieid Control Wiring Raceway
DISCONNECT
PER NEC
INTEGRATED GAS UNIT
CONTROLLER (IGC)
HEAT ANTICIPATOR SETTINGS - Set heat anticipator
settings at. 14 amp for the first stage and . 14 amp for secondstage heating, when available.
Step 8 - Make Outdoor-Air Adjustments and Install Outdoor-Air Hood
MANUAL OUTDOOR-AIR DAMPER - The outdoor-air
hood and screen are attached to the basepan at the bottom
of the unit for shipping.
Assembly:
1. Determine quantity of ventilation required for building.
Record amount for use in Step 8.
2. Remove and save evaporator coil access panel and screws.
See Fig. 12.
3. Separate hood and screen from basepan by removing the
4 screws securing them. Save all screws.
EVAPORATOR
COIL ACCESS ?
PANEL \
SCREWS
(SIDE) “
4. Replace evaporator coil access panel.
5. Place hood on front of evaporator coil access panel. See
Fig. 13 for hood details. Secure top of hood with the 4
screws removed in Step 3. See Fig. 14.
6. Remove and save 6 screws (3 on each side) from sides
of the manual outdoor-air damper.
7. Align screw holes on hood with screw holes on side of
manual outdoor-air damper. See Fig. 13 and 14. Secure
hood with 6 screws from Step 6.
8. Adjust minimum position setting of the damper blade by
adjusting the manual outdoor air adjustment screws on
the front of the damper blade. See Fig. 12. Slide blade
vertically until it is in the appropriate position deter
mined by Fig. 15. Tighten screws.
9. Remove and save screws currently on sides of hood. In
sert screen. Secure screen to hood using the screws. See
Fig. 14.
SCREW
HOLES
(TOP)
HOOD
MANUAL
OUTDOOR-AIR »
ADJUSTMENT
SCREWS
POSITION
SETTING SCALE
Fig. 12 — Damper Panel with Manual Outdoor-Air
Damper Installed
HOOD
SCREEN
LOCATION
(SCREEN NO
SHOWN)
Fig. 14
Outdoor-Air Damper with Hood
Attached
OUTDOOR AIRFLOW (cfm x 100)
Fig. 15 - Position Setting
10
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