Carrier 48Tjd008 014 Users Manual

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48TJD008-014
48TJE008-014
48TJF008-012
Single-Package Rooftop Heating/Cooling Units

Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
Step 1 — Provide Unit Support . . . . . . . . . . . . . . . 1
• ROOF CURB
• SLAB MOUNT
Step 2 — Field Fabricate Ductwork . . . . . . . . . . . . 2
Step 3 — Install External Trap for
Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 4 — Rig and Place Unit . . . . . . . . . . . . . . . . . . 2
• POSITIONING
Step 5 — Install Flue Hood . . . . . . . . . . . . . . . . . . . 8
Step 6 — Install Gas Piping . . . . . . . . . . . . . . . . . . . 8
Step 7 — Make Electrical Connections . . . . . . . . 8
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
• HEAT ANTICIPATOR SETTINGS
Step 8 — Adjust Factory-Installed Options . . . 11
• APOLLO CONTROL
• MANUAL OUTDOOR-AIR DAMPER
• OPTIONAL DURABLADE ECONOMIZER
• OPTIONAL PARABLADE ECONOMIZER
Step 9 — Adjust Evaporator-Fan Speed . . . . . . 16
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23,24
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-30
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 31-36
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . CL-1

SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment
can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters. All
other operations should be performed by trained service personnel. When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached
to the unit, and other safety precautions that may 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.

Disconnect gas piping from unit when leak
testing at pressure greater than 1⁄2 psig. Pressures greater than 1⁄2 psig will cause gas
valve damage resulting in hazardous condition. If gas valve is subjected to pressure greater than 1⁄2 psig, it must be replaced
before use. When pressure testing fieldsupplied gas piping at pressures of 1⁄2 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.

INSTALLATION
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 insulationside down. Seals around duct openings must be tight. See
Fig. 1.

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. If
gas is to be routed through the curb, attach the accessory
thru-the-curb service connection plate to the roof curb in accordance with the accessory installation instructions. Connection plate must be installed before unit is set in roof curb.
IMPORTANT: The gasketing of the unit to the roof
curb is critical for a watertight seal. Install gasket supplied with the roof curb as shown in Fig. 2. Improperly applied gasket can also 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 properly. Refer to Accessory Roof Curb Installation Instructions
for additional information as required.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
PC 111
Catalog No. 564-934
Printed in U.S.A.
Form 48TJ-13SI
Pg 1
9-96
Replaces: 48TJ-10SI
Tab 1a 6a

bottom connection to the side connection. See Fig. 4. The
piping for the condensate drain and external trap can be completed after the unit is in place.
All units must have an external trap for condensate drainage. Install a trap at least 4-in. deep and protect against freezeup. See Fig. 5. If drain line is installed downstream from the
external trap, pitch the line away from the unit at 1 in. per
10 ft of run. Do not use a pipe size smaller than the unit
connection.

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 applications, field-supplied flanges should be attached to horizontal
discharge openings and all ductwork secured to the flanges.
Insulate and weatherproof all external ductwork, joints, and
roof openings with counter flashing and mastic in accordance with applicable codes.
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 applicable fire codes.
A minimum clearance is not required around ductwork.
Cabinet return-air static shall not exceed −.35 in. wg with
Durablade or PARABLADE economizer or .45 in. wg without economizer.
These units are designed for a minimum continuous returnair temperature of 50 F (dry bulb), or an intermittent operation down to 45 F (dry bulb), such as when used with a night
set-back thermostat.

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. 6 for additional information.
Operating weight is shown in Table 1 and Fig. 6.
Lifting holes are provided in base rails as shown in
Fig. 6 and 7. Refer to rigging instructions on unit.

All panels must be in place when rigging.
POSITIONING — Maintain clearance around and above unit
to provide minimum distance from combustible materials,
proper airflow, and service access. See Fig. 7.
Do not install unit in an indoor location. Do not locate
unit air inlets near exhaust vents or other sources of contaminated air.
Be sure that unit is installed so 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.
Position unit on roof curb so that the following clearances
are maintained: 1⁄4-in. clearance between roof curb and base
rails on each side and front of unit; 15⁄32-in. clearance between roof curb and rear of unit. (See Fig. 2, section C-C.)

Step 3 — Install External Trap for Condensate
Drain — The unit’s 3⁄4-in. condensate drain connections
are located at the bottom and side of the unit. Unit discharge
connections do not determine the use of drain connections;
either drain connection can be used with vertical or horizontal applications.
When using the standard side drain connection, make sure
the plug in the alternate bottom connection is tight before
installing the unit.
To use the bottom drain connection for a roof curb installation, relocate the factory-installed plug from the

Fig. 1 — Horizontal Conversion Panels
2

UNIT SIZE
48TJ

‘‘B’’

‘‘C’’

‘‘D’’ ALT DRAIN HOLE

‘‘E’’
GAS
⁄ 9 NPT

34

008-014

28-87⁄169 [827] 18-1015⁄169 [583]

13⁄49 [45]

⁄ 9 NPT

34

POWER
CONTROL
CONNECTION CONNECTION
⁄ 9 NPT

⁄ 9 NPT

34

12

11⁄49 NPT

⁄ 9 NPT

12

UNIT SIZE
48TJ
008-014

CONNECTOR
ACCESSORY
PACKAGE
CRBTMPWR00A100
(THRU-THE-BOTTOM)
CRBTMPWR00A200
(THRU-THE-BOTTOM)

ROOF CURB
ACCESSORY
18-29 [356] CRRFCURB003A00
28-09 [610] CRRFCURB004A00
‘‘A’’

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 4 ft on each side.
7.

Direction of airflow.

8. Either accessory connector package can be used
with either roof curb.

Fig. 2 — Roof Curb Details
3

MAXIMUM ALLOWABLE
DIFFERENCE (in.)
A-B
0.5

B-C
1.0

A-C
1.0

Fig. 3 — Unit Leveling Tolerances
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4-in. trap is recommended.

Fig. 5 — External Trap Condensate Drain
Locate mechanical draft system flue assembly at least
48 in. from any opening through which combustion products could enter the building, and at least 48 in. from an adjacent building or combustible material. 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 clearance of 48 in. from electric and gas meters, gas regulators,
and gas relief equipment.
Flue gas can deteriorate building materials. Orient unit so
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 Combustion and Ventilation, NFGC (National Fuel Gas Code), ANSI
(American National Standards Institute) Z223.1-latest year
and addendum Z223.1A-latest year. In Canada, installation
must be in accordance with the CAN1. B149.1 and
CAN1.B149.2 installation codes for gas burning appliances.

NOTE: Drain plug is shown in factory-installed position.

Fig. 4 — Condensate Drain Pan

NOTES:
1. Dimension in ( ) is in millimeters.
2. Hook rigging shackles through holes in base rail as shown in detail ‘‘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.
3. Weights include base unit without economizer. See Table 1 for economizer
weights.

UNIT
48TJD/TJE/TJF008
48TJD/TJE/TJF009
48TJD/TJE/TJF012
48TJD/TJE014

All panels must be in place when rigging.

Fig. 6 — Rigging Details
4

MAX
WEIGHT
lb
870
880
1035
1050

kg
395
399
469
476

‘‘A’’
in.
87.38
87.38
87.38
87.38

mm
2219
2219
2219
2219

DIMENSIONS
‘‘B’’
in.
mm
40.25 1022
40.25 1022
40.25 1022
40.25 1022

‘‘C’’
in.
mm
41.31 1050
41.31 1050
49.31 1253
49.31 1253

Table 1 — Physical Data
UNIT SIZE 48TJ
NOMINAL CAPACITY (tons)
OPERATING WEIGHT (lb)
Unit
Al/Al*
Al/Cu*
Cu/Cu*
Durablade Economizer
PARBLADE Economizer
Roof Curb
COMPRESSOR
Quantity
Oil (oz)
REFRIGERANT TYPE
Operating Charge (lb-oz)
Circuit 1
Circuit 2
CONDENSER COIL
Rows...Fins/in.
Total Face Area (sq ft)
CONDENSER FAN
Nominal Cfm
Quantity...Diameter (in.)
Motor Hp...Rpm
Watts Input (Total)
EVAPORATOR COIL
Rows...Fins/in.
Total Face Area (sq ft)
EVAPORATOR FAN
Quantity...Size (in.)
Type Drive
Nominal Cfm
Motor Hp
Maximum Continuous Bhp
Motor Frame Size
Nominal Rpm High/Low
Fan Rpm Range
Motor Bearing Type
Maximum Allowable Rpm
Motor Pulley Pitch Diameter Min/Max (in.)
Nominal Motor Shaft Diameter (in.)
Fan Pulley Pitch Diameter (in.)
Nominal Fan Shaft Diameter (in.)
Belt, Quantity...Type...Length (in.)
Pulley Center Line Distance (in.)
Speed Change per Full Turn of
Movable Pulley Flange (rpm)
Movable Pulley Maximum Full Turns
From Closed Position
Factory Setting
Factory Speed Setting (rpm)
Fan Shaft Diameter at Pulley (in.)

008D/E/F
7 1 ⁄2

009D/E/F
8 1 ⁄2

012D/E/F
10

014D/E
121⁄2

870
881
893
44
62
143

880
896
907
44
62
143
Reciprocating
2
50 ea

1035
1057
1080
44
62
143

1050
1077
1100
44
62
143
Scroll
2
54 ea

2
50 ea

2
50 ea
R-22

4-13
4-14

Std
Alt
Std
Alt
Std
Alt
Std
Alt
Std
Alt
Std
Alt
Std
Alt
Std
Alt
Std
Alt
Std
Alt
Std
Alt
Std
Alt
Std
Alt
Std
Alt
Std
Alt

6-14
5-13
8-10
6-3
5-14
8- 6
Enhanced Copper Tubes, Aluminum Lanced Fins
1...17
2...17
2...17
2...17
20.50
18.00
17.42
25.00
Propeller Type
6500
6500
7000
7000
2...22
2...22
2...22
2...22
1⁄4...1100
1⁄4...1100
1⁄4...1100
1⁄4...1100
600
600
600
600
Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol™ Feed Device
3...15
3...15
3...15
4...15
8.0
8.0
10.0
11.1
Centrifugal Type
1...15 x 15
1...15 x 15
1...15 x 15
1...15 x 15
1...15 x 15
—
1...15 x 15
1...15 x 15
Belt
Belt
Belt
Belt
Belt
—
Belt
Belt
3000
3400
4000
5000
—
—
—
—
—
—
—
—
2.40
2.40
2.40
4.20
—
—
2.90
5.25
56
56
56
56
—
—
56
56
—
—
—
—
590-840
685-935
685-935
860-1080
685-935
—
835-1085
900-1260
Ball
Ball
Ball
Ball
2100
2100
2100
2100
2.4/3.4
2.8/3.8
2.8/3.8
4.0/5.0
2.8/3.8
—
3.4/4.4
3.1/4.1
5⁄8
5 ⁄8
5 ⁄8
7 ⁄8
7⁄8
7 ⁄8
—
—
7.0
7.0
7.0
8.0
7.0
—
7.0
5.9
—
—
—
—
1...A...48
1...A...48
1...A...51
1...A...51
1...A...51
—
1...A...57
1...BX...46
16.75-19.25
16.75-19.25
15.85-17.50
15.85-17.50
16.75-19.25
—
15.85-17.50
15.85-17.50
50
50
50
44
50
—
50
50
5
5
5
5
5
—
5
6
5
5
5
5
5
—
5
6
590
685
685
860
685
—
835
960
1
1
1
1
(See legend and notes on page 6.)

5

Table 1 — Physical Data (cont)
UNIT SIZE 48TJ
FURNACE SECTION
Rollout Switch Cutout
Temp (F)
Burner Orifice Diameter
(in. ...drill size)
Natural Gas
Std
Liquid Propane
Alt
Pilot Orifice Diameter
(Quantity) in. ...drill size
Natural Gas
Std
Liquid Propane
Alt
Thermostat Heat Anticipator
Setting (amps)
208/230 v Stage 1
Stage 2
460 v Stage 1
Stage 2
Gas Input (Btuh) Stage 1
Stage 2
Efficiency (Steady
State) (%)
Temperature Rise Range
Manifold Pressure (in. wg)
Natural Gas
Std
Liquid Propane
Alt
Gas Valve Quantity
Field Gas Connection
Size (in.)
HIGH-PRESSURE SWITCH (psig)†
Standard Compressor
Internal Relief (Differential)
Cutout
Reset (Auto.)
LOW-PRESSURE SWITCH (psig)†
Cutout
Reset (Auto.)
FREEZE PROTECTION
THERMOSTAT (F)†
Opens
Closes
OUTDOOR-AIR INLET SCREENS
Quantity...Size (in.)
RETURN-AIR FILTERS
Quantity...Size (in.)

008D/E/F

009D/E/F

012D/E/F

014D/E

195

195

195

195

.120...31
.096...41

.120...31
.096...41

—
—

—
—

.120...31/.120...31/.129...30 .120...31/.129...30
.096...41/.096...41/.102...38 .096...41/.102...38

.14
.14
.20
.20
.14
.14
.20
.20
125,000/120,000/180,000 125,000/120,000/180,000
—/180,000/224,000
—/180,000/224,000

—
—

—
—

.14
.20
.14
.20
120,000/180,000/200,000
180,000/224,000/250,000

.14
.20
.14
.20
180,000/200,000
224,000/250,000

80
20-50/35-65/45-75

80
20-50/35-65/45-75

80
35-65/35-65/40-70

80
35-65/40-70

3.5
3.5
1

3.5
3.5
1

3.5
3.5
1

3.5
3.5
1

⁄/⁄/⁄

12 34 34

⁄/⁄/⁄

34 34 34

⁄/⁄/⁄

34 34

12 34 34

⁄/⁄

450 ± 50

500 ± 50

428
320

428
320
7±3
22 ± 7

30 ± 5
45 ± 5
Cleanable
1...20 x 25 x 1
1...16 x 25 x 1
Throwaway
4...16 x 20 x 2

4...16 x 20 x 2

LEGEND
Al
— Aluminum
Bhp — Brake Horsepower
Cu — Copper

4...20 x 20 x 2

4...20 x 20 x 2

*Evaporator coil fin material/condenser coil fin material.
†Requires an optional or accessory controls kit.
NOTE: The 48TJ008-014 units have a loss-of-charge/low-pressure
switch (accessory) located in the liquid line.

6

STANDARD
UNIT
WEIGHT
Lb
Kg
D/E/F008
870 395
D/E/F009
880 399
D/E/F012 1035 469
D/E014
1050 476
UNIT
48TJ

CORNER CORNER CORNER CORNER
WEIGHT WEIGHT WEIGHT WEIGHT
(A)
(B)
(C)
(D)
Lb Kg Lb Kg Lb Kg Lb Kg
189
86 161 73 239 109 280 127
191
87 163 74 242 110 284 129
225 102 192 87 285 129 333 151
228 103 195 88 289 131 338 153

‘‘H’’

‘‘J’’

ft-in. mm ft-in.
1-27⁄8 378 3-55⁄16
3-37⁄8 1013 3-55⁄16
2-57⁄8 759 4-15⁄16
1-27⁄8 378 4-15⁄16

mm
1050
1050
1253
1253

‘‘K’’
ft-in.
2-911⁄16
2-911⁄16
3-03⁄8
3-03⁄8

‘‘L’’
mm
856
856
924
924

ft-in.
2- 27⁄16
2- 27⁄16
2-107⁄16
2-107⁄16

mm
672
672
875
875

A
B
C
D
E

CONNECTION SIZES
13⁄89 Dia [35] Field Power Supply Hole
2-1⁄29 Dia [64] Power Supply Knock-Out
13⁄49 Dia [44] Charging Port Hole
7⁄89 Dia [22] Field Control Wiring Hole
3⁄49—14 NPT Condensate Drain

⁄ 9—14 NPT Gas Connection 48TJD008 & 009
⁄ 9—14 NPT Gas Connection 48TJE/F008 & 009;
48TJD/E012,014, 48TJF012
G 29 Dia [51] Power Supply Knock-Out
12

F

34

NOTES:
1. Dimensions in [ ] are in millimeters.
2.
Center of gravity.
3.

Direction of airflow.

4. On vertical discharge units, ductwork to be attached to accessory roof curb only. For
horizontal discharge units field-supplied flanges should be attached to horizontal discharge openings, and all ductwork should be attached to the flanges.
5. Minimum clearance (local codes or jurisdiction may prevail):
a. Between unit (flue side) and combustible surfaces, 48 inches.
b. Bottom of unit to combustible surfaces (when not using curb) 1 inch.
Bottom of base rail to combustible surfaces (when not using curb) 0 inches.
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 condenser fan operation.
e. Between units, control box side, 42 in. per NEC (National Electrical Code).
f. Between unit and ungrounded surfaces, control box side, 36 in. per NEC.
g. Between unit and block or concrete walls and other grounded surfaces, control
box side, 42 in. per NEC.
h. Horizontal supply and return end, 0 inches.
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 installed on combustible floors made from wood or Class A, B, or C
roof covering material if set on base rail.
8. The vertical center of gravity is 18-79 [483] up from the bottom of the base rail. Horizontal center of gravity is shown.
BOTTOM POWER CHART, THESE HOLES
REQUIRED FOR USE WITH ACCESSORY
PACKAGES — CRBTMPWR001A00,
OR CRBTMPWR002A00
THREADED
CONDUIT SIZE
1⁄2(
3⁄4(
11⁄4(

WIRE SIZE
24 V
Power*
Power*

REQUIRED HOLE
SIZES (MAX)
7⁄89 [22.2]
11⁄89 [28.4]
13⁄49 [44.4]

*Select either 3⁄49 or 11⁄49 for power, depending on wire size.

Fig. 7 — Base Unit Dimensions
7

Step 5 — Install Flue Hood — Flue hood is 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. 8.

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 Z223.1latest year and addendum Z223.1A-latest year entitled
National Fuel Gas Code. In Canada, installation must be in
accordance with the CAN1.B149.1 and CAN1.B149.2 installation codes for gas burning appliances.
For natural gas applications, gas pressure at unit gas connection must not be less than 4.0 in. wg (5.0 in. wg in high
heat units) or greater than 13.0 in. wg while unit is operating. For liquid propane applications, the gas pressure must
not be less than 5.0 in. wg or greater than 13.0 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
connection.
Support gas piping as shown in the table in Fig. 9. For
example, a 3⁄4-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, and a 48-ft long pipe
would have a minimum of 6 support beams.
See Fig. 9 for typical pipe guide and locations of external
manual gas shutoff valve.

LEGEND
NFGC — National Fuel Gas Code
*Field supplied.
NOTE: Follow all local codes.

SPACING OF SUPPORTS
STEEL PIPE
NOMINAL
DIAMETER
(in.)

X
DIMENSION
(feet)

1⁄2
⁄ or 1
11⁄4 or larger

6
8
10

34

Fig. 9 — Gas Piping Guide (With Accessory
Thru-the-Curb Service Connections)
FIELD POWER SUPPLY — All units except 208/230-v units
are factory wired for the voltage shown on the nameplate. 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 red wire on the transformer and connecting it to the 200-v blue wire from the transformer. The
red wire then must be insulated.
Refer to unit label diagram for additional information. Pigtails are provided for field service.
When installing units, provide a disconnect per NEC. Use
copper conductors only when splice connectors are used.
All field wiring must comply with NEC and local requirements. In Canada, electrical connections must be in accordance with CSA (Canadian Standards Association) C22.1
Canadian Electrical Code Part One.
Install conduit through side panel openings indicated in
Fig. 7. Route power lines through connector to terminal connections as shown in Fig. 10.
On 3-phase units, voltages between phases must be balanced within 2% and the current within 10%. Use the formula shown in Table 2, Note 2 to determine the percentage
of voltage imbalance. Operation on improper line voltage or
excessive phase imbalance constitutes abuse and may cause
damage to electrical components. Such operation would invalidate any applicable Carrier warranty.
NOTE: If field-installed thru-the-bottom connections are used,
refer to the accessory installation instructions for power wiring. Refer to Fig. 7 for drilling holes in basepan.
FIELD CONTROL WIRING — Install a Carrier-approved
accessory thermostat assembly according to installation instructions included with the accessory. Locate thermostat assembly on a solid wall in the conditioned space to sense average temperature in accordance with thermostat installation
instructions.
NOTE: For wire runs up to 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 minimum).
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.

Step 7 — Make Electrical Connections

Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury 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 electrical ground when installed in accordance with NEC
(National Electrical Code), ANSI/NFPA (National Fire
Protection Association), latest edition, and local electrical codes. Do not use gas piping as an electrical ground.
Failure to follow this warning could result in the installer being liable for personal injury of others.

Fig. 8 — Flue Hood Details

8

Route thermostat cable or equivalent single leads of colored wire from subbase terminals to low-voltage connections on unit (shown in Fig. 11) as described in Steps 1 - 4
below.
1. If unit is mounted on roof curb and accessory thru-thecurb service plate connection is used, route wire through
connection plate.
2. Pass control wires through the hole provided on unit
(see connection D in Connection Sizes table in Fig. 7).
3. Feed wires through the raceway built into the corner post
to the 24-v barrier located on the left side of the control

box. See Fig. 12. The raceway provides the UL-required
(Underwriters’ Laboratories) clearance between high- and
low-voltage wiring.
4. Connect thermostat wires to screw terminals on lowvoltage connection board.
HEAT ANTICIPATOR SETTINGS — Set heat anticipator
settings at .14 amp for the first stage and .20 amp for secondstage heating.

Table 2 — Electrical Data
UNIT
48TJ

008
(71⁄2 Tons)

009
(81⁄2 Tons)

012
(10 Tons)

COMPR
(ea)
RLA LRA

Std

187

254

13.6

73.4

14

⁄

Std

414

508

6.2

37.7

Std

518

632

4.9

31.0

Std

187

254

15.8

92.0

Std

414

508

7.4

46.0

Std

518

632

5.9

44.0

187

254

17.9

110.0

414

508

8.6

55.0

518

632

6.4

44.0

187

254

23.0

146.0

414

508

10.4

73.0

518

632

8.3

58.4

14

IFM
TYPE

208/230
(3 phase)
460
(3 phase)
575
(3 phase)
208/230
(3 phase)
460
(3 phase)
575
(3 phase)
208/230
(3 phase)

Std
Alt
Std
Alt
Std
Alt
Std
Alt
Std
Alt
Std
Alt

460
(3 phase)
575
(3 phase)
208/230
(3 phase)

014
(121⁄2 Tons)

VOLTAGE
RANGE
Min Max

NOMINAL
VOLTAGE
(60 Hz)

460
(3 phase)
575
(3 phase)

OFM
(ea)
Hp FLA

FLA

COMBUSTION
FAN MOTOR
FLA

1.4

5.8

14

⁄

0.8

14

⁄

IFM

POWER SUPPLY

DISCONNECT
SIZE*
FLA
LRA

MCA

MOCP†

.57

39.2/39.2

45/45

41/41

194/194

2.6

.30

18.0

25

19

99

0.8

2.6

.30

14.2

20

15

81

14

⁄

1.4

5.8

.57

44.2/44.2

50/50

46/46

231/231

14

⁄

0.8

2.6

.30

20.7

25

22

116

14

⁄

0.8

2.6

.30

16.5

20

17

107

14

⁄

1.4

14

⁄

0.8

14

⁄

0.8

14

⁄

1.4

14

⁄

0.8

⁄

0.8

48.9/48.9
50.6/50.6
23.4
24.2
17.6
18.2
65.2/65.2
69.6/69.6
29.6
32.2
23.6
25.7

60/60
60/60
30
30
20
20
80/80
80/80
35
35
30
35

51/51
53/53
24
25
18
19
68/68
73/73
31
34
25
27

267/267
286/286
134
173
107
139
383/383
406/406
192
203
154
163

LEGEND

5.8
7.5
2.6
3.4
2.6
3.4
10.6
15.0
4.8
7.4
4.8
7.4

.57
.30
.30
.57
.30
.30

EXAMPLE: Supply voltage is 460-3-60.

FLA
— Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM
— Indoor (Evaporator) Fan Motor
LRA
— Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC
— National Electrical Code
OFM
— Outdoor (Condenser) Fan Motor
RLA
— Rated Load Amps
UL
— Underwriters’ Laboratories
*Used to determine minimum disconnect size per NEC.
†Fuse or HACR circuit breaker.

AB = 452 v
BC = 464 v
AC = 455 v
452 + 464 + 455
3
1371
=
3

Average Voltage =

= 457
NOTE: The 575-v 48TJ008-014 units are UL, Canada, 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 percent voltage imbalance.
7
% Voltage Imbalance = 100 x
457
= 1.53%

NOTES:
1. In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the
overcurrent protective device for the unit shall be fuse or HACR
breaker. Canadian units may be fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the following formula to determine
the percent voltage imbalance.
% Voltage Imbalance
max voltage deviation from average voltage
= 100 x
average voltage

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.

9

LEGEND
C
— Contactor
COMPS — Compressors
IFC
— Indoor (Evaporator) Fan
Contactor
NEC
— National Electrical Code
TB
— Terminal Block
Terminal Block Connection
Splice Connection
(Factory Supplied)
Field Wiring
Factory Wiring

Fig. 10 — Power Wiring Connections

UNIT
CONNECTION
BOARD

INTEGRATED
GAS UNIT
CONTROLLER
(IGC)

LEGEND
AHA
CC
TC
TH

—
—
—
—

Adjustable Heat Anticipator
Cooling Compensator
Thermostat-Cooling
Thermostat-Heating
Field Wiring
Factory Wiring

Fig. 11 — Low-Voltage Connections
RACEWAY

Fig. 12 — Field Control Wiring Raceway

10

Step 8 — Adjust Factory-Installed Options
APOLLO CONTROL — The optional Apollo control is used
to actively monitor all modes of operation as well as indoor
(evaporator) fan status, filter status, and indoor-air quality.
The Apollo control is designed to work with Carrier TEMP
and VVTt systems.
The thermostat must be wired to the Apollo control before
starting the unit. Refer to the Apollo control installation instructions for information on installing the thermostat. See
Fig. 13 for Apollo location.
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 filter access panel by raising panel and swinging panel outward. Panel is now disengaged from track
and can be removed. No tools are required to remove
the filter access panel. Remove outdoor-air opening panel.
Save panels and screws. See Fig. 14.
3. Separate hood and screen from basepan by removing the
screws and brackets securing them. Save all screws and
discard brackets.
4. Replace outdoor air opening panel with screws saved
from Step 2.
5. Place hood on front of outdoor-air opening panel. See
Fig. 15 for hood details. Secure top of hood with the
6 screws removed in Step 3. See Fig. 16.
6. Remove and save 8 screws (4 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. 15 and 16. Secure
hood with 8 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. 14. Slide blade
vertically until it is in the appropriate position determined by Fig. 17. Tighten screws.
WIRING TO
THERMOSTAT

APOLLO
CONTROL

OUTDOOR
AIR OPENING
PANEL

Fig. 14 — Damper Panel with Manual
Outdoor-Air Damper Installed

CONTROL
WIRING

Fig. 15 — Outdoor-Air Hood Details

HOOD

NOT
SHOWN)

Fig. 13 — Apollo Control Factory-Installed
in Typical Unit

Fig. 16 — Damper with Hood Attached
11

7.
8.

9.
Fig. 17 — Position Setting
10.

9. Remove and save screws currently on sides of hood.
Insert screens. Secure screens to hood using the screws.
See Fig. 16.
10. Replace filter access panel. Ensure filter access panel
slides along the tracks and is securely engaged.

11.
12.

OPTIONAL DURABLADE ECONOMIZER — The optional economizer hood assembly is packaged and shipped
in the filter section. Damper blades and control boards are
installed at the factory and the economizer is shipped in the
vertical discharge position.
NOTE: Horizontal discharge block-off plate is shipped with
the air hood package. If unit is to be used for vertical discharge application, discard this plate.
Assembly
1. Determine if ventilation air is required in building. If
so, determine the minimum amount to be supplied by
each unit and record quantity of ventilation air needed
for use in Step 8.
2. Remove filter access panel by raising panel and swinging panel outward. Panel is now disengaged from track
and can be removed. No tools are required to remove
filter access panel. Remove outdoor-air opening panel.
Save panels and screws. See Fig. 18. Remove optional
economizer and outdoor-air damper hood package from
filter section.
3. Assemble outdoor-air hood top and side plates as shown
in Fig. 19. Install seal strips on hood top and sides. Put
aside screen retainer and retainer screw for later assembly. Do not attach hood to unit at this time.
4. On 012 and 014 units, install vertical discharge blockoff plate over duct openings. See Fig. 20.
5. Slide economizer into unit and secure with screws. See
Fig. 21.
NOTE: Be sure to engage rear economizer flange under
tabs in vertical return-air opening.
6. To convert to horizontal discharge application:
a. Rotate the economizer 90 degrees until the economizer motor faces the condenser section (see
Fig. 22).

13.
14.

b. Rotate the barometric relief damper hinge
90 degrees. Barometric relief damper should open vertically to operate properly.
c. Install horizontal discharge block-off plate over the
opening on the access panel. (Block-off plate MUST
be installed before installing hood assembly.) See
Fig. 23.
Insert economizer plug into economizer harness. Remove tape from barometric relief damper. See Fig. 21.
If ventilation air is not required, proceed to Step 9. If
ventilation air is required, determine the minimum position setting for required airflow. See Fig. 24. Adjust
minimum position setting by adjusting the screws on the
position setting bracket. See Fig. 25. Slide bracket until
the top screw is in the position determined by
Fig. 24. Tighten screws.
Remove tape from outdoor-air thermostat (OAT). Fasten OAT to inside of hood using screws and speed clips
provided. See Fig. 26. Make sure OAT terminals are positioned up.
Replace outdoor-air opening panel using screws from
Step 2. Replace filter access panel. Ensure the filter access panel slides along the tracks and is securely
engaged.
Fasten hood top and side plate assembly to outdoor-air
opening panel with screws provided.
Place knob supplied with economizer on OAT. See
Fig. 26. Set for 3° F below indoor room thermostat setting. If accessory enthalpy control (EC) is used in place
of OAT, see instructions shipped with EC for installation and adjustment. See Fig. 26.
Connect OAT per Fig. 27.
Slide outdoor-air inlet screens into screen track on hood
side plate. While holding screens in place, fasten screen
retainer to hood using screws provided.

NOTE: Refer to Fig. 28 for Durablade economizer barometric relief damper characteristics.

OUTDOOR-AIR
OPENING PANEL

FILTER ACCESS
PANEL

Fig. 18 — Access Panel Locations

12

ECONOMIZER
CONTROL BOARD

ECONOMIZER
PLUG

ECONOMIZER
MOTOR

TOP
SCREW

Fig. 21 — Durablade Economizer Installed in Unit
ECONOMIZER CONTROL BOARD

ECONOMIZER MOTOR

Fig. 19 — Outdoor-Air Hood Details

POSITION SETTING BRACKET

Fig. 22 — Horizontal Durablade Economizer
Installation (90 Degree Rotation)
Fig. 20 — Vertical Discharge Block-Off Plate
(Sizes 120,150 only)

BLOCK-OFF PLATE

Fig. 23 — Horizontal Discharge Block-Off Plate

13

Example:
Given —
Negative Pressure . . . . . . . . . . . . . . . . . . . . . . . 0.1 in. wg
Outdoor Airflow . . . . . . . . . . . . . . . . . . . . . . . . 1100 cfm
Determine —
Setting = 69

Fig. 24 — Durablade Economizer Damper
Minimum Position Setting

9
8
7
6
5
4
3
2
1
0

C

SO

D

TR

REV. B 1 9 8 8 1 8 A

B

S
5

4

2

P1

T1

TR

C

24VAC

2

TR1

1

3 mA MIN. AT 11 VDC

B A

ENTHALPY CONTROL

3

D

CW–SETPOINTS–CCW

RUSH AT 24VAC

CONTACT RATINGS: 1.5A RUN, 3.5A IN

°F

CONTACTS SHOWN IN HIGH ENTHALPY
OR UNPOWERED STATE

OUTDOOR TEMP.

% 90
H
DAMPER
U 70
CLOSED
M
I 60
DAMPER
D
OPEN
I 30
T
Y 10
50 55 60 65 70 75 80 85
REV.

1

P

T

MINIMUM 3
POSITION

OPEN

Fig. 25 — Durablade Economizer Minimum
Position Damper Setting

97-3672

Fig. 26 — Outdoor-Air Thermostat/
Enthalpy Control Installation

Fig. 27 — Wiring Connections for
Outdoor-Air Thermostat
14

dampers should be fully closed. Turn the potentiometer gradually counterclockwise until the desired position is reached.
c. Connect T and T1 to the 24 v power supply.
d. After installation is complete, calculate the minimum airflow across the economizer. To calculate the
minimum airflow, the following data is needed: total
cfm (cfm3), temperature of the total cfm (T3), temperature of the return air (T1), and temperature of the
entering outside air (T2). Cfm1 is the return air cfm,
which will be the minimum airflow.
Insert the data into the following equations:
T1 (cfm1) + T2 (cfm2)
= T3
cfm3
cfm2 = (cfm3 – cfm1)
Therefore:
T1 (cfm1) + T2 (cfm3 – cfm1)
cfm3

= T3

Use this equation to determine cfm1, which is the minimum airflow across the economizer.
(T3 – T2) cfm3
cfm1 =
(T1 – T2)

Fig. 28 — Durablade Economizer Barometric Relief
Damper Characteristics
OPTIONAL PARABLADE ECONOMIZER — The optional PARABLADE economizer hood assembly is packaged and shipped in the filter section. Damper blades and
control boards are installed at the factory and the economizer is shipped in the vertical discharge position.
NOTE: Horizontal discharge block-off plate is shipped with
the air hood package. The PARABLADE economizer can
only be used for vertical discharge applications. Discard this
plate.
Assembly
1. Determine if ventilation air is required in building. If
so, determine the minimum amount to be supplied by
each unit and record quantity of ventilation air needed
for use in Step 7.
2. Remove filter access panel by raising panel and swinging panel outward. Panel is now disengaged from track
and can be removed. No tools are required to remove
filter access panel. Remove outdoor-air opening panel.
See Fig. 18. Save panels and screws. Remove optional
economizer so the outdoor-air damper hood package can
be removed from the filter section.
3. Assemble outdoor-air hood top and side plates as shown
in Fig. 19. Install seal strips on hood top and sides. Put
aside screen retainer and retainer screw for later assembly. Do not attach hood to unit at this time.
4. On 012 and 014 units, install vertical discharge blockoff plate over duct openings. See Fig. 20.
5. Slide economizer into unit and secure with screws. See
Fig. 29.
NOTE: Be sure to engage rear economizer flange under
tabs in vertical return-air opening.
6. Insert economizer plug into economizer harness. Remove tape from barometric relief damper. See Fig. 29.
7. If ventilation air is not required, proceed to Step 8. If
ventilation air is required, perform the following:
a. Make sure the factory-installed jumper is in place across
terminals P and P1 on the economizer logic module.
T and T1 should be disconnected during adjustment.
b. The 2 potentiometers with slots for adjustment are
located on the face of the economizer logic module.
Turn the lower potentiometer fully clockwise. The

8.

9.

10.
11.

If cfm1 does not match the desired minimum airflow
from Step 1, re-adjust the minimum position setting
screw.
Determine the enthalpy changeover set point from
Fig. 30. The enthalpy changeover set point should be
set to return the outdoor air damper to the minimum position when enthalpy rises above the set point. The settings are A, B, C, and D. Set the enthalpy changeover
per the setting in Fig. 30.
Replace outdoor-air opening panel using screws from
Step 2. Replace filter access panel. Ensure the filter access panel slides along the tracks and is securely engaged. See Fig. 31.
Fasten hood top and side plate assembly (Fig. 32) to
outdoor-air opening panel with screws provided.
Slide outdoor-air inlet screens into screen track on hood
side plate. While holding screens in place, fasten screenretainer to hood using screws provided. See Fig. 33.

ECONOMIZER CONTROL
MODULE/DAMPER ACTUATOR

WIRING
HARNESS

ENTHALPY
SENSOR

BAROMETRIC
RELIEF DAMPER

Fig. 29 — PARABLADE Economizer Installed in Unit
15

CONTROL
CURVE
A
B
C
D

CONTROL POINT
F (C) (APPROX)
AT 50% RH
73 [23]
70 [21]
67 [19]
63 [17]

Fig. 33 — Filter Installed on Outdoor-Air Hood

Step 9 — Adjust Evaporator-Fan Speed — Adjust evaporator-fan speed to meet jobsite conditions.
Table 3 shows fan rpm at motor pulley settings, Table 4
shows motor efficiencies and Table 5 gives accessory static
pressure drops. Table 6 shows motor performance. Refer to
Tables 7-14 to determine fan speed settings. Fan motor pulleys are factory set for speed shown in Table 1.
To change fan speed:
1. Shut off unit power supply.
2. Loosen belt by loosening fan motor mounting plate nuts
(see Fig. 34 and 35).
3. Loosen movable pulley flange setscrew (see Fig. 36).
4. Screw movable flange toward fixed flange to increase speed
and away from fixed flange to decrease speed. Increasing
fan speed increases load on motor. Do not exceed maximum speed specified in Table 1.
5. Set movable flange at nearest keyway of pulley hub and
tighten setscrew (see Table 1 for speed change for each
full turn of pulley flange).
To align fan and motor pulleys:
1. Loosen fan pulley setscrews.
2. Slide fan pulley along fan shaft.
3. Make angular alignment by loosening motor from mounting plate.
To adjust belt tension (see Fig. 34 and 35):
1. Loosen fan motor mounting plate nuts.
2. Units 008,009 — Slide motor mounting plate away from
fan scroll for proper belt tension (1⁄2-in. deflection with
one finger) and tighten mounting nuts (see Fig. 34).
Units 012,014 — Slide motor mounting plate downward
to tighten belt tension. Secure motor mounting plate nuts.
See Fig. 35.
3. Adjust bolt and nut on mounting plate to secure motor in
fixed position.

RH — Relative Humidity

Fig. 30 — Enthalpy Settings for
PARABLADE Economizer

Fig. 31 — Panels Reinstalled on Unit

Fig. 32 — Outdoor-Air Hood Installed on Unit

16

MOTOR MOUNTING
PLATE NUTS

Fig. 34 — Typical Belt-Drive Motor Mounting
for Sizes 008,009
Fig. 36 — Evaporator-Fan Pulley Adjustment

Fig. 35 — Typical Belt-Drive Motor Mounting
for Sizes 012,014

Table 3 — Fan Rpm at Motor Pulley Settings*
UNIT
48TJ
008†
008**
009†
012†
012††
014†
014††

0
840
935
935
935
1085
1080
1260

⁄
815
910
910
910
1060
1060
1220
12

1
790
885
885
885
1035
1035
1185

11⁄2
765
860
860
860
1010
1015
1155

MOTOR PULLEY TURNS
2
21⁄2
3
740
715
690
835
810
785
835
810
785
835
810
785
985
960
935
990
970
950
1130
1100
1075

*Approximate rpm shown.
†Indicates standard motor and drive.
**Indicates alternate drive.
††Indicates alternate motor and drive.

17

OPEN
31⁄2
665
760
760
760
910
925
1045

4
640
735
735
735
885
905
1015

41⁄2
615
710
710
710
860
880
990

5
590
685
685
685
835
860
960

51⁄2
—
—
—
—
—
—
930

6
—
—
—
—
—
—
900

Table 4 — Evaporator-Fan Motor Efficiency
MOTOR
48TJD/TJE/TJF008,009
48TJD/TJE/TJF012 (Std)
48TJD/TJE/TJF012 (Alt)
48TJD/TJE014 (Std)
48TJD/TJE014 (Alt)

EFFICIENCY (%)
80
80
83
85
87

NOTE: Convert watts to bhp using the following formula:
watts input x motor efficiency
bhp =
746

Table 5 — Economizer Static Pressure Drop (in. wg)
UNIT
48TJ
Durablade Economizer
PARABLADE Economizer

2200
.02
.21

2500
.02
.25

3000
.03
.35

3500
.04
.49

CFM
4000
.05
.61

4500
.06
—

5000
.07
—

5500
.08
—

6000
.09
—

Table 6 — Motor Data
UNIT
48TJ

EVAPORATORFAN MOTOR

MAXIMUM
CONTINUOUS
BHP*

MAXIMUM
OPERATING
WATTS*

008

Std

2.40

2120

009

Std

2.40

2120

Std

2.40

2120

Alt

2.90

2615

Std

4.20

3775

Alt

5.25

4400

012

014

UNIT
VOLTAGE

MAXIMUM
AMP DRAW

208/230
460
575
208/230
460
575
208/230
460
575
208/230
460
575
208/230
460
575
208/230
460
575

6.1
2.7
2.7
6.1
2.7
2.7
6.1
2.7
2.7
7.9
3.6
3.6
11.1
5.0
5.0
15.0
7.4
7.4

LEGEND
Bhp — Brake Horsepower
*Extensive motor and electrical testing on these units ensures that the full horsepower and watts range of the
motors can be utilized with confidence. Using your fan motors up to the ratings shown in this table will not result
in nuisance tripping or premature motor failure. Unit warranty will not be affected.

18

Table 7 — Fan Performance, 48TJ008 — Vertical Discharge Units
AIRFLOW
(Cfm)
2200
2250
2300
2400
2500
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750

0.2
Rpm
Bhp

0.4
Rpm
Bhp

EXTERNAL STATIC PRESSURE (in. wg)
0.6
0.8
1.0
1.2
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp

1.4
Rpm
Bhp

1.6
Rpm
Bhp

506
514
521
536
551
559
567
582
598
614
630
646
662
679
695
712
729
745
754

586
593
600
613
626
634
641
655
670
684
699
714
729
744
759
774
790
805
813

656
662
668
680
693
700
706
719
732
745
759
773
787
801
816
830
845
860
868

898
902
905
910
912
915
918
927
938
949
961
972
983
995
1007
—
—
—
—

935
939
943
952
963
968
973
976
983
993
1003
1015
1026
—
—
—
—
—
—

0.52
0.55
0.57
0.63
0.69
0.72
0.75
0.83
0.90
0.98
1.07
1.16
1.26
1.36
1.47
1.59
1.71
1.84
1.91

0.72
0.76
0.79
0.85
0.93
0.97
1.00
1.08
1.17
1.25
1.35
1.45
1.55
1.66
1.78
1.90
2.03
2.17
2.24

0.95
0.99
1.02
1.09
1.17
1.21
1.25
1.34
1.43
1.53
1.63
1.74
1.86
1.98
2.10
2.23
2.37
2.52
2.59

718
724
730
741
753
759
764
776
789
802
815
828
841
854
867
881
895
909
917

1.18
1.22
1.26
1.34
1.43
1.48
1.52
1.61
1.71
1.81
1.92
2.04
2.16
2.29
2.42
2.56
2.71
2.87
2.95

LEGEND

1.43
1.78
1.50
1.59
1.69
1.74
1.79
1.89
2.00
2.11
2.23
2.35
2.48
2.61
2.75
2.90
3.05
3.22
3.30

838
841
843
849
859
864
869
880
892
903
915
926
938
950
963
976
988
—
—

1.78
1.81
1.83
1.88
1.96
2.01
2.06
2.17
2.29
2.42
2.54
2.67
2.81
2.95
3.10
3.25
3.41
—
—

2.21
2.25
2.28
2.31
2.31
2.34
2.37
2.47
2.58
2.71
2.85
3.00
3.14
3.30
3.45
—
—
—
—

2.58
2.60
2.62
2.74
2.81
2.81
2.81
2.84
2.92
3.03
3.17
3.32
3.47
—
—
—
—
—
—

5. Values include losses for filters, unit casing, and wet coils.
6. Maximum continuous bhp is 2.4. Extensive motor and electrical
testing on these units ensures that the full range of the motor can
be utilized with confidence. Using your fan motors up to the ratings shown will not result in nuisance tripping or premature motor
failure. Unit warranty will not be affected.
7. Use of a field-supplied motor may affect wire sizing. Contact your
Carrier representative to verify.
8. Interpolation is permissible. Do not extrapolate.

Bhp — Brake Horsepower Input to Fan
NOTES:
1. Boldface indicates field-supplied drive required. (See Note 4.)
2.

776
781
786
796
808
814
819
831
842
854
866
878
891
904
917
930
943
956
963

indicates alternate drive required.

3.
indicates field-supplied motor and drive required.
4. Standard drive range is 590 to 840 rpm. Alternate drive range is
685 to 935 rpm. All other rpms require a field-supplied drive.

Table 8 — Fan Performance, 48TJ009 — Vertical Discharge Units
AIRFLOW
(Cfm)
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
3800
3900
4000
4100
4200
4250
4300

0.2
Rpm
Bhp
559
0.72
567
0.75
582
0.83
598
0.90
614
0.98
630
1.07
646
1.16
662
1.26
679
1.36
695
1.47
712
1.59
729
1.71
745
1.84
754
1.91
762
1.98
779
2.12
796
2.27
813
2.42
830
2.59
839
2.68
847
2.76

0.4
Rpm
Bhp
634
0.97
641
1.00
655
1.08
670
1.17
684
1.25
690
1.35
714
1.45
729
1.55
744
1.66
759
1.78
774
1.90
790
2.03
805
2.17
813
2.24
821
2.31
836
2.46
852
2.61
868
2.78
884
2.95
890
3.04
900
3.13

EXTERNAL STATIC PRESSURE (in.
0.6
0.8
1.0
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
700
1.21
759
1.48
814
1.74
706
1.25
764
1.52
819
1.79
719
1.34
776
1.61
831
1.89
732
1.43
789
1.71
842
2.00
745
1.53
802
1.81
854
2.11
759
1.63
815
1.92
866
2.23
773
1.74
828
2.04
878
2.35
787
1.86
841
2.16
891
2.48
801
1.98
854
2.29
904
2.61
816
2.10
867
2.42
917
2.75
830
2.23
881
2.56
930
2.90
845
2.37
895
2.71
943
3.05
860
2.52
909
2.87
956
3.22
868
2.59
917
2.95
963
3.30
875
2.66
924
3.03
970
3.38
890
2.82
938
3.19
—
—
905
2.98
953
3.37
—
—
920
3.15
—
—
—
—
935
3.33
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

LEGEND
Bhp — Brake Horsepower Input to Fan
NOTES:
1. Boldface indicates field-supplied drive required. (See Note 3.)

wg)
1.2
Rpm
Bhp
864
2.01
869
2.06
880
2.17
892
2.29
903
2.42
915
2.54
926
2.67
938
2.81
950
2.95
963
3.10
976
3.25
988
3.41
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

1.4
Rpm
Bhp
915
2.34
918
2.37
927
2.47
938
2.58
949
2.71
961
2.85
972
3.00
983
3.14
995
3.30
1007
3.45
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

1.6
Rpm
Bhp
968
2.81
973
2.81
976
2.84
983
2.92
993
3.03
1003
3.17
1016
3.32
1026
3.47
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

5. Maximum continuous bhp is 2.4. Extensive motor and electrical
testing on these units ensures that the full range of the motor can
be utilized with confidence. Using your fan motors up to the ratings shown will not result in nuisance tripping or premature motor
failure. Unit warranty will not be affected.
6. Use of a field-supplied motor may affect wire sizing. Contact your
Carrier representative to verify.
7. Interpolation is permissible. Do not extrapolate.

2.
indicates field-supplied motor and drive required.
3. Standard drive range is 685 to 935 rpm. All other rpms require a
field-supplied drive.
4. Values include losses for filters, unit casing, and wet coils.

19

Table 9 — Fan Performance, 48TJ012 — Vertical Discharge Units
AIRFLOW
(Cfm)
3000
3100
3200
3300
3400
3500
3600
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000

EXTERNAL STATIC PRESSURE (in. wg)
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
592
607
622
638
653
669
684
700
715
731
747
763
778
794
810
826
842
858
874
890
906

0.76
0.83
0.90
0.98
1.06
1.15
1.24
1.33
1.43
1.54
1.64
1.76
1.88
2.00
2.13
2.27
2.41
2.55
2.70
2.86
3.03

661
676
690
705
719
733
747
760
774
787
801
816
831
846
861
876
892
907
922
938
953

0.93
1.01
1.09
1.17
1.26
1.35
1.44
1.54
1.64
1.74
1.85
1.97
2.10
2.23
2.37
2.52
2.67
2.83
2.99
3.16
3.33

722
734
746
759
772
786
800
814
828
843
857
872
886
900
913
927
940
954
968
—
—

1.09 779
1.17 791
1.25 803
1.33 815
1.43 826
1.53 838
1.64 850
1.75 863
1.86 875
1.98 888
2.10 902
2.23 916
2.36 929
2.50 943
2.64 958
2.78 973
2.92 987
3.08 1002
3.24 —
—
—
—
—

1.26 829
1.34 840
1.43 852
1.52 864
1.62 876
1.72 888
1.82 900
1.92 912
2.04 924
2.16 936
2.30 948
2.44 960
2.58 972
2.73 985
2.89 999
3.04 1012
3.21 —
3.38 —
—
—
—
—
—
—

1.42
1.51
1.60
1.70
1.81
1.91
2.03
2.14
2.26
2.38
2.51
2.64
2.78
2.93
3.09
3.26
—
—
—
—
—

LEGEND
Bhp — Brake Horsepower Input to Fan
NOTES:
1. Boldface indicates field-supplied drive required. (See Note 4.)
2.

880
890
900
910
921
933
945
957
969
981
993
1005
1016
1028
1040
—
—
—
—
—
—

1.58
1.68
1.77
1.88
1.98
2.10
2.22
2.34
2.47
2.60
2.74
2.88
3.03
3.17
3.32
—
—
—
—
—
—

924
935
946
957
967
976
986
998
1010
1022
1034
1046
1058
—
—
—
—
—
—
—
—

1.73
1.84
1.95
2.06
2.17
2.29
2.41
2.54
2.67
2.81
2.96
3.11
3.26
—
—
—
—
—
—
—
—

970
977
987
998
1009
1020
1030
1039
1049
1060
1072
1084
—
—
—
—
—
—
—
—
—

1.89
2.00
2.11
2.23
2.35
2.48
2.61
2.74
2.87
3.02
3.17
3.32
—
—
—
—
—
—
—
—
—

1019
1026
1029
1037
1047
1058
1069
1081
1091
1100
1110
—
—
—
—
—
—
—
—
—
—

2.00
2.17
2.28
2.40
2.53
2.66
2.80
2.94
3.08
3.23
3.38
—
—
—
—
—
—
—
—
—
—

1066
1070
1075
1082
1087
1095
1106
1117
1128
—
—
—
—
—
—
—
—
—
—
—
—

2.30
2.44
2.51
2.58
2.70
2.84
2.98
3.13
3.29
—
—
—
—
—
—
—
—
—
—
—
—

5. Values include losses for filters, unit casing, and wet coils.
6. Maximum continuous bhp is 2.4 for the standard motor and 2.9 for
the alternate motor. Extensive motor and electrical testing on these
units ensures that the full range of the motor can be utilized with
confidence. Using your fan motors up to the ratings shown will not
result in nuisance tripping or premature motor failure. Unit warranty will not be affected.
7. Use of a field-supplied motor may affect wire sizing. Contact your
Carrier representative to verify.
8. Interpolation is permissible. Do not extrapolate.

indicates alternate motor and/or drive required.

3.
indicates field-supplied motor and drive required.
4. Standard drive range is 685 to 935 rpm. Alternate drive range is
835 to 1085 rpm. All other rpms require a field-supplied drive.

Table 10 — Fan Performance, 48TJ014 — Vertical Discharge Units
AIRFLOW
(Cfm)
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000
5100
5200
5300
5400
5500
5600
5700
5800
5900
6000
6100
6200

0.2
Rpm Bhp
729 1.36
745 1.46
761 1.56
777 1.67
793 1.79
810 1.91
826 2.04
842 2.17
859 2.31
876 2.45
892 2.60
909 2.77
926 2.93
942 3.11
959 3.29
976 3.47
993 3.67
1010 3.87
1027 4.07
1043 4.29
1060 4.51
1077 4.74
1094 4.98
1111 5.22
1128 5.48
1145 5.74

0.4
Rpm Bhp
790 1.58
805 1.69
820 1.80
836 1.92
851 2.05
867 2.18
883 2.32
898 2.46
914 2.60
930 2.76
945 2.91
961 3.07
977 3.24
993 3.41
1009 3.60
1025 3.78
1041 3.98
1057 4.18
1073 4.39
1090 4.61
1106 4.83
1122 5.07
1139 5.31
1155 5.55
—
—
—
—

0.6
Rpm Bhp
847 1.79
861 1.89
875 2.01
889 2.14
904 2.27
918 2.41
933 2.55
948 2.70
962 2.85
977 3.01
992 3.18
1008 3.36
1024 3.54
1039 3.73
1055 3.92
1071 4.12
1086 4.33
1102 4.54
1118 4.76
1133 4.99
1149 5.22
1165 5.45
1181 5.70
—
—
—
—
—
—

EXTERNAL STATIC
0.8
1.0
Rpm Bhp Rpm Bhp
902 2.06 955 2.29
915 2.17 967 2.41
928 2.29 979 2.55
941 2.40 991 2.68
955 2.52 1004 2.82
968 2.65 1017 2.96
982 2.79 1030 3.11
996 2.93 1043 3.25
1010 3.09 1056 3.40
1024 3.26 1070 3.55
1039 3.43 1083 3.71
1053 3.61 1097 3.88
1068 3.80 1111 4.06
1080 3.99 1125 4.25
1097 4.19 1139 4.46
1112 4.40 1153 4.67
1127 4.61 1168 4.90
1142 4.84 1182 5.13
1157 5.07 1197 5.36
1173 5.31 1211 5.61
1189 5.55 —
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

LEGEND
Bhp — Brake Horsepower Input to Fan
NOTES:
1. Boldface indicates field-supplied drive required. (See Note 4.)
2.

PRESSURE
1.2
Rpm Bhp
1008 2.55
1019 2.67
1029 2.80
1040 2.94
1052 3.08
1064 3.23
1076 3.40
1088 3.56
1101 3.73
1114 3.90
1126 4.07
1140 4.25
1153 4.41
1166 4.59
1180 4.78
1194 4.98
1208 5.19
1221 5.41
1235 5.64
—
—
—
—
—
—
—
—
—
—
—
—
—
—

(in. wg)
1.4
Rpm Bhp
1060 2.80
1070 2.94
1079 3.07
1089 3.22
1100 3.36
1110 3.51
1121 3.67
1133 3.84
1144 4.00
1157 4.19
1169 4.38
1181 4.58
1194 4.77
1207 4.97
1220 5.18
1233 5.38
1246 5.58
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

1.6
Rpm Bhp
1108 3.05
1118 3.19
1128 3.34
1137 3.49
1147 3.65
1157 3.81
1167 3.97
1178 4.14
1188 4.31
1199 4.49
1210 4.68
1222 4.87
1234 5.09
1247 5.30
1259 5.52
1272 5.74
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

1.8
Rpm Bhp
1152 3.27
1163 3.44
1173 3.60
1183 3.76
1193 3,93
1202 4.09
1212 4.27
1222 4.44
1232 4.62
1242 4.81
1252 5.00
1263 5.20
1274 5.40
1286 5.62
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

2.0
Rpm Bhp
1190 3.46
1203 3.65
1214 3.83
1225 4.00
1236 4.19
1245 4.38
1255 4.56
1265 4.74
1274 4.93
1284 5.13
1294 5.33
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

5. Values include losses for filters, unit casing, and wet coils.
6. Maximum continuous bhp is 4.2 for the standard motor and 5.25
for the alternate motor. Extensive motor and electrical testing on
these units ensures that the full range of the motor can be utilized
with confidence. Using your fan motors up to the ratings shown
will not result in nuisance tripping or premature motor failure. Unit
warranty will not be affected.
7. Use of a field-supplied motor may affect wire sizing. Contact your
Carrier representative to verify.
8. Interpolation is permissible. Do not extrapolate.

indicates alternate motor and/or drive required.

3.
indicates field-supplied motor and drive required.
4. Standard drive range is 860 to 1080 rpm. Alternate drive range is
900 to 1260 rpm. All other rpms require a field-supplied drive.

20

Table 11 — Fan Performance, 48TJ008 — Horizontal Discharge Units
AIRFLOW
(Cfm)
2200
2250
2300
2400
2500
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750

0.2
Rpm Bhp

0.4
Rpm Bhp

0.6
Rpm Bhp

499
507
513
528
542
550
557
573
588
604
620
636
652
668
684
701
717
733
742

580
586
592
606
619
627
634
648
662
676
690
704
718
732
747
762
777
792
800

652
658
663
674
686
692
698
711
723
737
750
764
778
793
807
821
835
849
856

0.50
0.53
0.55
0.60
0.66
0.69
0.72
0.79
0.86
0.94
1.02
1.11
1.21
1.31
1.41
1.53
1.65
1.77
1.84

0.70
0.73
0.76
0.83
0.90
0.94
0.97
1.05
1.13
1.21
1.30
1.39
1.49
1.59
1.70
1.82
1.94
2.07
2.14

0.94
0.97
1.00
1.06
1.13
1.17
1.21
1.29
1.38
1.48
1.58
1.69
1.80
1.92
2.04
2.16
2.29
2.42
2.49

EXTERNAL STATIC PRESSURE (in. wg)
0.8
0.9
1.0
1.2
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
717
722
727
738
748
754
759
770
782
794
806
818
831
844
857
871
885
899
907

1.17
1.22
1.26
1.34
1.41
1.45
1.49
1.58
1.66
1.76
1.86
1.97
2.09
2.21
2.35
2.48
2.63
2.78
2.86

748
752
756
766
777
783
787
798
809
821
832
844
856
869
882
895
908
922
929

LEGEND

779
783
786
795
806
812
816
827
837
848
849
870
882
894
907
919
932
945
952

1.43
1.46
1.49
1.58
1.68
1.74
1.79
1.88
1.98
2.08
2.18
2.29
2.40
2.53
2.66
2.80
2.95
3.11
3.20

839
843
846
853
859
864
868
878
889
900
910
920
931
942
954
966
978
990
997

1.78
1.81
1.84
1.88
1.94
1.99
2.04
2.16
2.29
2.41
2.52
2.64
2.76
2.89
3.02
3.15
3.30
3.45
3.54

1.6
Rpm Bhp

905
908
910
912
919
920
921
928
937
947
958
968
979
989
1000
1011
1022
1034
1040

951
955
959
967
971
974
976
983
986
993
1002
1012
1023
1034
1044
1054
1065
1076
1082

2.21
2.25
2.25
2.31
2.37
2.39
2.41
2.45
2.57
2.70
2.85
2.99
3.13
3.26
3.40
3.55
3.69
3.84
3.93

2.57
2.59
2.61
2.68
2.73
2.76
2.78
2.88
2.91
3.01
3.15
3.30
3.47
3.63
3.79
3.94
4.10
4.26
5.27

5. Values include losses for filters, unit casing, and wet coils.
6. Maximum continuous bhp is 2.4. Extensive motor and electrical
testing on these units ensures that the full range of the motor can
be utilized with confidence. Using your fan motors up to the ratings shown will not result in nuisance tripping or premature motor
failure. Unit warranty will not be affected.
7. Use of a field-supplied motor may affect wire sizing. Contact your
Carrier representative to verify.
8. Interpolation is permissible. Do not extrapolate.

Bhp — Brake Horsepower Input to Fan
NOTES:
1. Boldface indicates field-supplied drive required. (See Note 4.)
2.

1.30
1.34
1.38
1.46
1.55
1.60
1.64
1.73
1.82
1.92
2.02
2.13
2.25
2.37
2.51
2.64
2.79
2.95
3.03

1.4
Rpm Bhp

indicates alternate drive required.

3.
indicates field-supplied motor and drive required.
4. Standard drive range is 590 to 840 rpm. Alternate drive range is
685 to 935 rpm. All other rpms require a field-supplied drive.

Table 12 — Fan Performance, 48TJ009 — Horizontal Discharge Units
AIRFLOW
(Cfm)
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
3800
3900
4000
4100
4200
4250
4300

0.2
Rpm Bhp
550 0.69
557 0.72
573 0.79
588 0.86
604 0.94
620 1.02
636 1.11
652 1.21
668 1.31
684 1.41
701 1.53
717 1.65
733 1.77
742 1.84
750 1.90
767 2.04
783 2.18
800 2.34
817 2.49
826 2.58
834 2.66

0.4
Rpm Bhp
627 0.94
634 0.97
648 1.05
662 1.13
676 1.21
690 1.30
704 1.39
718 1.49
732 1.59
747 1.70
762 1.82
777 1.94
792 2.07
800 2.14
807 2.21
822 2.35
838 2.50
854 2.66
869 2.82
877 2.91
885 3.00

0.6
Rpm Bhp
692 1.17
698 1.21
711 1.29
723 1.38
737 1.48
750 1.58
764 1.69
778 1.80
793 1.92
807 2.04
821 2.16
835 2.29
849 2.42
856 2.49
863 2.56
877 2.71
891 2.86
905 3.02
920 3.19
928 3.28
935 3.37

EXTERNAL STATIC PRESSURE (in. wg)
0.8
0.9
1.0
Rpm Bhp Rpm Bhp Rpm Bhp
754 1.45
783 1.60
812 1.74
759 1.49
787 1.64
816 1.79
770 1.58
798 1.73
827 1.88
782 1.66
809 1.82
837 1.98
794 1.76
821 1.92
848 2.08
806 1.86
832 2.02
849 2.18
818 1.97
844 2.13
870 2.29
831 2.09
856 2.25
882 2.40
844 2.21
869 2.37
894 2.53
857 2.35
882 2.51
907 2.66
871 2.48
895 2.64
919 2.80
885 2.63
908 2.79
932 2.95
899 2.78
922 2.95
945 3.11
907 2.86
929 3.03
952 3.20
914 2.93
936 3.11
958 3.28
928 3.09
950 3.27
972 3.45
942 3.26
964 3.45
986 3.63
956 2.43
978 3.62 1000 3.81
970 3.60
992 3.80 1015 4.00
977 3.69
999 3.90 1022 4.10
984 3.78 1006 3.99 1029 4.20

LEGEND

1.2
Rpm Bhp
864 1.99
868 2.04
878 2.16
889 2.29
900 2.41
910 2.52
920 2.64
931 2.76
942 2.89
954 3.02
966 3.15
978 3.30
990 3.45
997 3.54
1003 3.62
1015 3.80
1028 3.99
1042 4.18
1055 4.38
1062 4.49
1069 4.59

1.4
Rpm Bhp
920 2.39
921 2.41
928 2.45
937 2.57
947 2.70
958 2.85
968 2.99
979 3.13
989 3.26
1000 3.40
1011 3.55
1022 3.69
1034 3.84
1040 3.93
1045 4.01
1057 4.18
1070 4.36
1082 4.56
1095 4.76
1102 4.87
1108 4.98

1.6
Rpm Bhp
974 2.76
976 2.78
983 2.88
986 2.91
993 3.01
1002 3.15
1012 3.30
1023 3.47
1034 3.63
1044 3.79
1054 3.94
1065 4.10
1076 4.26
1082 5.27
1087 4.43
1098 4.60
1110 4.78
1122 4.97
1134 5.16
1140 5.27
1147 5.38

5. Maximum continuous bhp is 2.4. Extensive motor and electrical
testing on these units ensures that the full range of the motor can
be utilized with confidence. Using your fan motors up to the ratings shown will not result in nuisance tripping or premature motor
failure. Unit warranty will not be affected.
6. Use of a field-supplied motor may affect wire sizing. Contact your
Carrier representative to verify.
7. Interpolation is permissible. Do not extrapolate.

Bhp — Brake Horsepower Input to Fan
NOTES:
1. Boldface indicates field-supplied drive required. (See Note 3.)
2.
indicates field-supplied motor and drive required.
3. Standard drive range is 685 to 935 rpm. All other rpms require a
field-supplied drive.
4. Values include losses for filters, unit casing, and wet coils.

21

Table 13 — Fan Performance, 48TJ012 — Horizontal Discharge Units
AIRFLOW
(Cfm)
3000
3100
3200
3300
3400
3500
3600
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000

EXTERNAL STATIC PRESSURE (in. wg)
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
552
565
578
591
605
619
633
648
662
677
692
707
722
737
752
768
783
799
814
—
—

0.68
0.74
0.81
0.88
0.96
1.04
1.13
1.23
1.33
1.44
1.55
1.67
1.80
1.94
2.08
2.24
2.40
2.56
2.74
—
—

632
644
656
668
680
691
703
714
726
738
750
762
775
787
800
814
827
841
855
868
883

0.87
0.93
1.00
1.08
1.16
1.23
1.31
1.39
1.51
1.61
1.73
1.84
1.97
2.09
2.21
2.35
2.50
2.64
2.80
2.90
3.10

701
711
723
734
745
755
766
777
789
801
813
825
837
848
860
871
883
894
906
918
931

1.05
1.12
1.20
1.28
1.36
1.44
1.52
1.61
1.72
1.82
1.94
2.05
2.16
2.27
2.39
2.51
2.64
2.77
2.91
3.05
3.21

761
772
782
793
803
813
824
835
846
857
868
878
889
900
912
924
937
949
961
972
—

1.22
1.31
1.39
1.47
1.56
1.65
1.74
1.85
1.95
2.06
2.17
2.28
2.40
2.52
2.66
2.80
2.95
3.10
3.26
3.40
—

816
825
835
845
856
867
877
887
897
908
918
929
941
952
962
973
983
994
—
—
—

1.36 871 1.54
1.45 879 1.63
1.55 887 1.71
1.65 895 1.80
1.75 904 1.91
1.86 914 2.03
1.97 924 2.15
2.07 935 2.28
2.18 946 2.40
2.29 956 2.53
2.40 967 2.66
2.53 977 2.78
2.66 987 2.91
2.80 999 3.04
2.93 1008 3.19
3.07 1019 3.34
3.21 —
—
3.36 —
—
—
—
—
—
—
—
—
—
—

LEGEND
Bhp — Brake Horsepower Input to Fan
NOTES:
1. Boldface indicates field-supplied drive required. (See Note 4.)
2.

918
928
937
946
953
961
970
980
989
1000
1010
1021
1032
1042
—
—
—
—
—
—
—

1.67
1.78
1.90
2.00
2.10
2.20
2.32
2.45
2.58
2.73
2.87
3.02
3.17
3.32
—
—
—
—
—
—
—

967
973
981
991
1000
1009
1017
1024
1033
1042
1052
1062
1072
—
—
—
—
—
—
—
—

1.89
1.94
2.04
2.16
2.29
2.41
2.53
2.64
2.76
2.91
3.06
3.22
3.38
—
—
—
—
—
—
—
—

1010
1018
1026
1032
1041
1051
1061
1069
1077
1085
1093
1102
—
—
—
—
—
—
—
—
—

2.09
2.17
2.26
2.32
2.44
2.57
2.72
2.87
2.99
3.12
3.24
3.41
—
—
—
—
—
—
—
—
—

1063
1070
1075
1080
1083
1090
1099
1109
1118
1127
—
—
—
—
—
—
—
—
—
—
—

2.46
2.51
2.57
2.64
2.65
2.74
2.88
3.03
3.20
3.36
—
—
—
—
—
—
—
—
—
—
—

5. Values include losses for filters, unit casing, and wet coils.
6. Maximum continuous bhp is 2.4 for the standard motor and 2.9 for
the alternate motor. Extensive motor and electrical testing on these
units ensures that the full range of the motor can be utilized with
confidence. Using your fan motors up to the ratings shown will not
result in nuisance tripping or premature motor failure. Unit warranty will not be affected.
7. Use of a field-supplied motor may affect wire sizing. Contact your
Carrier representative to verify.
8. Interpolation is permissible. Do not extrapolate.

indicates alternate motor and/or drive required.

3.
indicates field-supplied motor and drive required.
4. Standard drive range is 685 to 935 rpm. Alternate drive range is
835 to 1085 rpm. All other rpms require a field-supplied drive.

Table 14 — Fan Performance, 48TJ014 — Horizontal Discharge Units
AIRFLOW
(Cfm)
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000
5100
5200
5300
5400
5500
5600
5700
5800
5900
6000
6100
6200

0.2
Rpm Bhp
677 1.20
691 1.28
705 1.37
720 1.47
734 1.56
749 1.66
764 1.77
779 1.88
793 1.99
808 2.11
822 2.24
837 2.37
852 2.51
867 2.65
882 2.79
896 2.95
911 3.11
926 3.27
940 3.44
955 3.62
970 3.80
985 3.99
1000 4.18
1015 4.39
1030 4.59
1046 4.81

0.4
Rpm Bhp
748 1.43
761 1.52
773 1.62
786 1.71
800 1.82
813 1.92
826 2.04
840 2.16
854 2.28
868 2.42
882 2.56
896 2.71
910 2.86
924 3.01
938 3.17
952 3.33
967 3.50
981 3.68
995 3.86
1010 4.04
1024 4.23
1039 4.42
1053 4.62
1068 4.83
1083 5.04
1097 5.26

0.6
Rpm Bhp
810 1.65
822 1.75
834 1.86
847 1.97
860 2.09
873 2.21
886 2.33
899 2.46
912 2.59
925 2.73
937 2.86
950 3.00
963 3.15
977 3.30
990 3.46
1003 3.63
1017 3.80
1030 3.98
1044 4.17
1058 4.38
1072 4.59
1086 4.80
1100 5.02
1114 5.25
1128 5.48
1142 5.71

EXTERNAL STATIC
0.8
1.0
Rpm Bhp Rpm Bhp
869 1.89 928 2.17
880 1.98 937 2.28
891 2.08 947 2.39
902 2.19 957 2.50
914 2.31 967 2.60
926 2.44 978 2.71
938 2.57 989 2.83
951 2.71 1000 2.96
963 2.86 1012 3.09
975 3.00 1024 3.25
988 3.16 1036 3.42
1001 3.32 1048 3.59
1014 3.48 1060 3.76
1027 3.65 1073 3.94
1040 3.82 1085 4.12
1053 4.00 1098 4.30
1066 4.18 1111 4.50
1079 4.35 1124 4.70
1092 4.54 1137 4.91
1105 4.73 1150 5.12
1118 4.93 1163 5.34
1131 5.14 1176 5.56
1144 5.36 —
—
1158 5.58 —
—
—
—
—
—
—
—
—
—

LEGEND

(in. wg)
1.4
Rpm Bhp
1036 2.68
1046 2.81
1055 2.94
1064 3.07
1072 3.20
1081 3.34
1090 3.48
1100 3.63
1109 3.78
1119 3.93
1129 4.09
1139 4.24
1150 4.38
1161 4.54
1172 4.71
1183 4.91
1194 5.08
1206 5.29
1218 5.52
1230 5.75
—
—
—
—
—
—
—
—
—
—
—
—

1.6
Rpm Bhp
1080 2.90
1092 3.05
1102 3.20
1112 3.34
1121 3.49
1130 3.64
1139 3.79
1148 3.94
1157 4.09
1166 4.26
1175 4.43
1185 4.60
1194 4.77
1204 4.95
1214 5.13
1225 5.29
1236 5.47
1247 5.65
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

1.8
Rpm Bhp
1114 3.07
1129 3.25
1143 3.42
1155 3.59
1165 3.76
1175 3.92
1185 4.08
1194 4.25
1203 4.42
1212 4.58
1221 4.76
1230 4.93
1239 5.12
1248 5.31
1257 5.51
1267 5.70
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

2.0
Rpm Bhp
1135 3.17
1156 3.39
1174 3.59
1190 3.80
1203 3.99
1215 4.18
1226 4.36
1236 4.54
1246 4.72
1255 4.91
1264 5.09
1273 5.28
1282 5.47
1291 5.66
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

5. Values include losses for filters, unit casing, and wet coils.
6. Maximum continuous bhp is 4.2 for the standard motor and 5.25
for the alternate motor. Extensive motor and electrical testing on
these units ensures that the full range of the motor can be utilized
with confidence. Using your fan motors up to the ratings shown
will not result in nuisance tripping or premature motor failure. Unit
warranty will not be affected.
7. Use of a field-supplied motor may affect wire sizing. Contact your
Carrier representative to verify.
8. Interpolation is permissible. Do not extrapolate.

Bhp — Brake Horsepower Input to Fan
NOTES:
1. Boldface indicates field-supplied drive required. (See Note 4.)
2.

PRESSURE
1.2
Rpm Bhp
984 2.43
993 2.55
1002 2.66
1011 2.79
1021 2.91
1030 3.04
1040 3.18
1050 3.31
1061 3.43
1071 3.56
1082 3.70
1093 3.86
1105 4.02
1117 4.20
1129 4.40
1141 4.60
1153 4.80
1166 5.01
1178 5.22
1190 5.44
1203 5.67
—
—
—
—
—
—
—
—
—
—

indicates alternate motor and/or drive required.

3.
indicates field-supplied motor and drive required.
4. Standard drive range is 860 to 1080 rpm. Alternate drive range is
900 to 1260 rpm. All other rpms require a field-supplied drive.

22

START-UP

Main Burners — Main burners are factory set and should

Outdoor-Air Inlet Screens — Outdoor-air inlet screens
must be in place before operating unit.

require no adjustment.
TO CHECK ignition of main burners and heating controls,
move thermostat set point above room temperature and verify
that the burners light and evaporator fan is energized. After
ensuring that the unit continues to heat the building, lower
the thermostat setting below the room temperature and verify
that the burners and evaporator fan turn off (fan will turn off
only if fan selector switch is in the AUTO. position). Refer
to Table 15 for the correct orifice to use at high altitudes.
NOTE: Upon a call for heat, the main burners will remain
on for a minimum of 60 seconds.

Compressor Mounting — Compressors are inter-

Heating

Unit Preparation — Make sure that unit has been installed in accordance with these installation instructions and
applicable codes. Make sure that Start-Up Checklist has been
completed and filled out.

Return-Air Filters — Make sure correct filters are installed in filter tracks (see Table 1). Do not operate unit without return-air filters.

nally spring mounted. Do not loosen or remove compressor
holddown bolts. On 48TJ014 units, remove the tiedown bands
that hold the compressors together.

1. Purge gas supply line of air by opening union ahead of
gas valve. When gas odor is detected, tighten union and
wait 5 minutes before proceeding.
2. Turn on electrical supply and open manual gas valve.
3. Set system switch selector at HEAT position and fan switch
at AUTO. or ON position. Set heating temperature lever
above room temperature.
4. The induced-draft motor will start.
5. After a call for heating, the main burners should light within
5 seconds. If the burners do not light, then there is a
22-second delay before another 5-second try. If the burners still do not light, the time delay is repeated. If the
burners do not light within 15 minutes, there is a lockout.
To reset the control, break the 24 v power to W1.
6. The evaporator-fan motor will turn on 45 seconds after
the burners are ignited.
7. The evaporator-fan motor will turn off 45 seconds after
the thermostat temperature is satisfied.
8. Adjust airflow to obtain a temperature rise within the range
specified on the unit nameplate and in Table 1.
NOTE: The default value for the evaporator-fan motor
ON and OFF delay is 45 seconds. The Integrated Gas Unit
Controller (IGC) modifies this value when abnormal limit
switch cycles occur. Based upon unit operating conditions, the ON delay can be reduced to 0 seconds and the
OFF delay can be extended to 180 seconds.
When one flash of the LED (light-emitting diode) is observed, the evaporator-fan ON/OFF delay has been modified. If the limit switch trips at the start of the heating
cycle during the evaporator ON delay, the time period of
the ON delay for the next cycle will be 5 seconds less
than the time at which the switch tripped. (Example: If
the limit switch trips at 30 seconds, the evaporator-fan
ON delay for the next cycle will occur at 25 seconds.) To
prevent short-cycling, a 5-second reduction will only occur if a minimum of 10 minutes has elapsed since the last
call for heating.
The evaporator-fan OFF delay can also be modified. Once
the call for heating has ended, there is a 10-minute period
during which the modification can occur. If the limit switch
trips during this period, the evaporator-fan OFF delay will
increase by 15 seconds. A maximum of 9 trips can occur,
extending the evaporator-fan OFF delay to 180 seconds.
To restore the original default value, reset the power to
the unit.
TO SHUT OFF UNIT — Set system selector switch at OFF
position. Resetting heating selector lever below room temperature will shut unit off temporarily until space temperature falls below thermostat setting.

Internal Wiring — Check all electrical connections in
unit control boxes. Tighten as required.
Refrigerant Service Ports — Each refrigerant system has 4 Schrader-type service gage ports: one on the suction line, one on the liquid line, and two on the compressor
discharge line. Be sure that caps on the ports are tight. One
Schrader-type valve is located under both the high-pressure
switch and the low-pressure switch when ordered as an option.
Compressor Rotation — On 3-phase units with scroll
compressors, it is important to be certain compressor is
rotating in the proper direction. To determine whether or not
compressor is rotating in the proper direction:
1. Connect service gages to suction and discharge pressure
fittings.
2. Energize the compressor.
3. The suction pressure should drop and the discharge pressure should rise, as is normal on any start-up.
If the suction pressure does not drop and the discharge
pressure does not rise to normal levels:
1. Note that the evaporator fan is probably also rotating in
the wrong direction.
2. Turn off power to the unit.
3. Reverse any two of the unit power leads.
4. Reapply power to the compressor.
The suction and discharge pressure levels should now move
to their normal start-up levels.
NOTE: When the compressor is rotating in the wrong
direction, the unit will make an elevated level of noise and
will not provide cooling.
Cooling — To start unit, turn on main power supply. Set
system selector switch at COOL position and fan switch at
AUTO. position. Adjust thermostat to a setting below room
temperature. Compressor starts on closure of contactor.
Check unit charge. Refer to Service, Refrigerant Charge
section, page 26.
Reset thermostat at a position above room temperature.
Compressor will shut off. Evaporator fan will shut off after
30-second delay.
TO SHUT OFF UNIT — Set system selector switch at OFF
position. Resetting thermostat at a position above room temperature shuts unit off temporarily until space temperature
exceeds thermostat setting.

23

Table 15 — Altitude Compensation*

ELEVATION
(Ft)

0-2,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000

125,000, 180,000, AND
224,000 BTUH
NOMINAL INPUT
Natural
Liquid
Gas
Propane
Orifice
Orifice
Size†
Size†
31
41
32
42
32
42
32
42
33
43
34
43
35
44
36
44
37
45
38
46
39
47
40
47
41
48
42
48

compressor no. 1 and the outdoor (condenser) fan motor (OFM).
The indoor (evaporator) fan motor (IFM) is energized and
the economizer damper moves to the minimum position. Upon
a further call for cooling, compressor contactor no. 2 will be
energized, starting compressor no. 2. After the thermostat is
satisfied, the damper moves to the fully closed position when
using an auto fan or to the minimum position when using a
continuous fan.
When the outdoor-air temperature is below the OAT setting and the thermostat calls for cooling, the economizer dampers move to the minimum position. If the supply-air temperature
is above 57 F, the damper continues to open until it reaches
the fully open position or until the supply-air temperature
drops below 52 F.
When the supply-air temperature falls to between 57 F
and 52 F, the damper will remain at an intermediate open
position. If the supply-air temperature falls below 52 F, the
damper will modulate closed until it reaches the minimum
position or until the supply-air temperature is above 52 F.
When the thermostat is satisfied, the damper will move to
the fully closed position when using an auto fan or to the
minimum position when using a continuous fan.
If the outdoor air alone cannot satisfy the cooling requirements of the conditioned space, economizer cooling is integrated with mechanical cooling, providing second-stage
cooling. Compressor no. 1 and the condenser fan will be energized and the position of the economizer damper will be
determined by the supply-air temperature. Compressor no. 2
is locked out.
When the second stage of cooling is satisfied, the compressor and OFM will be deenergized. The damper position
will be determined by the supply-air temperature.
After a 30-second delay, the IFM shuts off. If the thermostat fan selector switch is in the ON position, the IFM
will run continuously.
COOLING UNITS WITH PARABLADE ECONOMIZER
— When the outdoor air is above the enthalpy control setting, and the room thermostat calls for cooling, the compressor contactor no. 1 is energized to start compressor no. 1 and
the outdoor (condenser) fan motor. The indoor (evaporator)
fan motor is energized and the economizer damper moves to
the minimum position. Upon further call for cooling, compressor contactor no. 2 is energized, starting compressor
no. 2. After the room thermostat is satisfied the damper will
spring return to the fully closed position.
When the outdoor air is below the enthalpy control setting
and the thermostat calls for cooling, the economizer outdoor
air damper is opened proportionally to maintain between 50
and 56 F at the mixed air sensor. If outside air alone cannot
satisfy the cooling requirements, economizer cooling is integrated with mechanical cooling and the second compressor is locked out. When the room thermostat is satisfied, the
damper will spring return to the fully closed position.
HEATING, UNITS WITH ECONOMIZER — When the thermostat calls for heating, terminal W1 is energized. In order
to prevent thermostat short-cycling, the unit is locked into
the Heating mode for at least 1 minute when W1 is energized. The induced-draft motor is then energized and the burner
ignition sequence begins. The indoor (evaporator) fan motor
(IFM) is energized 45 seconds after a flame is ignited and
the damper moves to the minimum position. On units equipped
for two stages of heat, when additional heat is needed, W2
is energized and the high-fire solenoid on the main gas valve
(MGV) is energized. When the thermostat is satisfied and
W1 and W2 are deenergized, the IFM stops after a 45 second time-off delay. The economizer damper then moves to
the fully closed position. When using continuous fan, the
damper will remain in the minimum position.

250,000 BTUH
NOMINAL INPUT
Natural
Gas
Orifice
Size†
30
30
31
32
33
34
35
36
37
38
39
40
41
42

Liquid
Propane
Orifice
Size†
38
39
40
41
42
43
43
44
44
45
45
46
47
47

*As the height above sea level increases, there is less oxygen per
cubic foot of air. Therefore, heat input rate should be reduced at
higher altitudes.
†Orifice available through your local distributor.

Safety Relief — A soft-solder joint at the suction line
Schrader port provides pressure relief under abnormal temperature and pressure conditions.

Ventilation (Continuous Fan) — Set fan and system selector switches at ON and OFF positions, respectively. Evaporator fan operates continuously to provide constant air circulation. When the evaporator-fan selector switch
is turned to the OFF position, there is a 30-second delay before the fan turns off.

Operating Sequence
COOLING, UNITS WITHOUT ECONOMIZER — When
thermostat calls for cooling, terminals G and Y1 are energized. The indoor (evaporator) fan contactor (IFC) and compressor contactor no. 1 (C1) are energized, and evaporatorfan motor, compressor no. 1, and condenser fan start. The
condenser-fan motor runs continuously while unit is
cooling. If the thermostat calls for a second stage of cooling
by energizing Y2, compressor contactor no. 2 (C2) is energized and compressor no. 2 starts.
When the thermostat is satisfied, C1 and C2 are deenergized and the compressors and outdoor (condenser) fan motor (OFM) shut off. After a 30-second delay, the indoor
(evaporator) fan motor (IFM) shuts off. If the thermostat fan
selector switch is in the ON position, the evaporator motor
will run continuously.
HEATING, UNITS WITHOUT ECONOMIZER — When
the thermostat calls for heating, terminal W1 is energized. In
order to prevent thermostat short-cycling, the unit is locked
into the Heating mode for at least 1 minute when W1 is energized. The induced-draft motor (IDM) is then energized
and the burner ignition sequence begins. The indoor (evaporator) fan motor (IFM) is energized 45 seconds after a flame
is ignited. On units equipped for two stages of heat, when
additional heat is needed, W2 is energized and the high-fire
solenoid on the main gas valve (MGV) is energized. When
the thermostat is satisfied and W1 and W2 are
deenergized, the IFM stops after a 45-second time-off delay.
COOLING, UNITS WITH DURABLADE ECONOMIZER
— When the outdoor-air temperature is above the OAT
(outdoor-air thermostat) setting and the room thermostat calls
for cooling, compressor contactor no. 1 is energized to start
24

SERVICE
When servicing unit, shut off all electrical power to unit
to avoid shock hazard or injury from rotating parts.

Cleaning — Inspect unit interior at the beginning of each
heating and cooling season and as operating conditions
require.
EVAPORATOR COIL — Clean coil as required. Inspect coil
at beginning of heating and cooling seasons.
1. Turn unit power off. Remove evaporator coil access panel.
2. If economizer is installed, remove economizer by
disconnecting Molex plug and removing economizer mounting screws. Refer to Accessory Economizer Installation
Instructions or Optional Economizer sections on
pages 12 and 15 for more details.
3. Slide filters out of unit.
4. Clean coil using a commercial coil cleaner or dishwasher
detergent in a pressurized spray canister. Wash both sides
of coil and flush with clean water. For best results, backflush toward return-air section to remove foreign
material.
5. Flush condensate pan after completion.
6. Reinstall economizer and filters.
7. Reconnect wiring.
8. Replace access panels.
CONDENSER COIL — Inspect coil monthly. Clean condenser coil annually, and as required by location and outdoorair conditions.
One-Row Coils — Wash coil with commercial cleaner. Clean
outer surfaces with a stiff brush in the normal manner. It is
not necessary to remove top panel.
2-Row Coils — Clean coil as follows:
1. Turn off unit power.
2. Remove top panel screws on condenser end of unit.
3. Remove condenser coil corner post. See Fig. 37. To hold
top panel open, place coil corner post between top panel
and center post. See Fig. 38.
4. Remove screws securing coil to center post.
5. Remove fastener holding coil sections together at return
end of condenser coil. Carefully separate the outer coil
section 3 to 4 in. from the inner coil section. See
Fig. 39.
6. Use a water hose or other suitable equipment to flush down
between the 2 coil sections to remove dirt and debris. Clean
the outer surfaces with a stiff brush in the normal manner.
7. Secure inner and outer coil rows together with a fieldsupplied fastener.
8. Reposition the outer coil section and remove the coil corner post from between the top panel and center post.
9. Reinstall the coil corner post and replace all screws.
CONDENSATE DRAIN — Check and clean each year at
start of cooling season. In winter, keep drain dry or protect
against freeze-up.
FILTERS — Clean or replace at start of each heating and
cooling season, or more often if operating conditions require
it. Replacement filters must be same dimensions as original
filters.

Fig. 37 — Cleaning Condenser Coil

Fig. 38 — Propping Up Top Panel

Fig. 39 — Separating Coil Sections

Lubrication
COMPRESSORS — Each compressor is charged with the
correct amount of oil at the factory.
FAN-MOTOR BEARINGS — Fan-motor bearings are of
the permanently lubricated type. No further lubrication is
required. No lubrication of condenser- or evaporator-fan
motors is required.
25

to the service port on the suction line. Mount the temperature sensing device on the suction line and insulate it so that
outdoor ambient temperature does not affect the reading. Indoorair cfm must be within the normal operating range of the
unit.
TO USE COOLING CHARGING CHART — Take the outdoor ambient temperature and read the suction pressure gage.
Refer to appropriate chart to determine what suction temperature should be. If suction temperature is high, add refrigerant. If suction temperature is low, carefully recover some
of the charge. Recheck the suction pressure as charge is adjusted. Example (Fig. 44, Circuit 2):
Outdoor Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 85 F
Suction Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 psig
Suction Temperature should be . . . . . . . . . . . . . . . . . . 56 F
(Suction temperature may vary ± 5 F.)
If Chargemastert charging device is used, temperature and
pressure readings must be accomplished using the charging
charts.

Condenser-Fan Adjustment (Fig. 40)
1. Shut off unit power supply.
2. Remove condenser-fan assembly (grille, motor, motor cover,
and fan) and loosen fan hub setscrews.
3. Adjust fan height as shown in Fig. 40.
4. Tighten setscrews and replace condenser-fan assembly.

48TJ UNIT VOLTAGE
208/230 V
460 V and 575 V

FAN HEIGHT ‘‘A’’ (in.)
2.75
3.50

Fig. 40 — Condenser-Fan Adjustment

Manual Outdoor-Air Damper — If outdoor-air damper
blade is required, see Manual Outdoor-Air Damper section
on page 11.
Economizer Adjustment — Refer to Optional Economizer sections on pages 12 and 15.

Condenser Coil Grille — Condenser coil grille is shipped
factory-installed. No adjustments are required.
Refrigerant Charge — Amount of refrigerant charge
is listed on unit nameplate (also refer to Table 1). Refer to
Carrier GTAC 2-5 Charging, Recovery, Recycling, and Reclamation training manual and the following procedures.
Unit panels must be in place when unit is operating during charging procedure.
NO CHARGE — Use standard evacuating techniques. After
evacuating system, weigh in the specified amount of refrigerant (refer to Table 1).
LOW CHARGE COOLING — Using Cooling Charging
Charts, Fig. 41-44, vary refrigerant until the conditions of
the appropriate chart are met. Note the charging charts are
different from the type normally used. The charts are based
on charging the units to the correct superheat for the various
operating conditions. Accurate pressure gage and temperature sensing device are required. Connect the pressure gage
Fig. 41 — Cooling Charging Chart; 48TJ008

26

Fig. 42 — Cooling Charging Chart; 48TJ009

Fig. 43 — Cooling Charging Chart; 48TJ012

27

Fig. 44 — Cooling Charging Chart; 48TJ014
history) and the indoor (evaporator) fan ON/OFF times will
be reset. For additional information, refer to the Start-Up,
Heating section on page 23. The LED error code can be observed through the viewport. See Fig. 12. During servicing
refer to the label on the control box cover or Table 16 for an
explanation of LED error code descriptions.
If lockout occurs, unit may be adjusted by interrupting power
supply to unit for at least 5 seconds.

Flue Gas Passageways — To inspect the flue collector box and upper areas of the heat exchanger:
1. Remove the combustion blower wheel and motor assembly according to directions in Combustion-Air Blower section below.
2. Remove the flue cover to inspect the heat exchanger.
3. Clean all surfaces as required using a wire brush.

Combustion-Air Blower — Clean periodically to as-

Table 16 — LED Error Code Description*

sure proper airflow and heating efficiency. Inspect blower
wheel every fall and periodically during heating season. For
the first heating season, inspect blower wheel bimonthly to
determine proper cleaning frequency.
To inspect blower wheel, shine a flashlight into drafthood
opening. If cleaning is required, remove motor and wheel as
follows:
1. Slide burner access panel out.
2. Remove the 6 screws that attach induced-draft motor housing to vestibule plate (Fig. 45).
3. The blower wheel can be cleaned at this point. If
additional cleaning is required, continue with Steps 4
and 5.
4. To remove blower from the motor shaft, remove 2
setscrews.
5. To remove motor, remove the 4 screws that hold blower
housing to mounting plate. Remove the motor cooling fan
by removing one setscrew. Then remove nuts that hold
motor to mounting plate.
6. To reinstall, reverse the procedure outlined above.

LED INDICATION
ON
OFF
1 Flash†
2 Flashes
3 Flashes
4 Flashes
5 Flashes
6 Flashes
7 Flashes
8 Flashes

ERROR CODE DESCRIPTION
Normal Operation
Hardware Failure
Evaporator Fan On/Off Delay Modified
Limit Switch Fault
Flame Sense Fault
4 Consecutive Limit Switch Faults
Ignition Lockout Fault
Induced-Draft Motor Fault
Rollout Switch Fault
Internal Control Fault

LED — Light-Emitting Diode
*A 3-second pause exists between LED error code flashes. If more
than one error code exists, all applicable codes will be displayed in
numerical sequence.
†Indicates a code that is not an error. The unit will continue to operate when this code is displayed.
IMPORTANT: Refer to Troubleshooting Tables 17-21 for additional
information.

Limit Switch — Remove blower access panel (Fig. 7).

Main Burners — At the beginning of each heating season, inspect for deterioration or blockage due to corrosion or
other causes. Observe the main burner flames and adjust if
necessary.

Limit switch is located on the fan deck.

Burner Ignition — Unit is equipped with a direct spark
ignition 100% lockout system. Integrated Gas Unit Controller (IGC) is located in the control box (Fig. 12). Module contains a self-diagnostic LED. A single LED on the IGC provides a visual display of operational or sequential problems
when the power supply is interrupted. When a break in power
occurs, the module will be reset (resulting in a loss of fault

When working on gas train, do not hit or plug orifice
spuds.
28

REMOVAL AND REPLACEMENT OF GAS TRAIN
(Fig. 45 and 46)
1. Shut off manual gas valve.
2. Shut off power to unit.
3. Slide out burner section side panel (not shown).
4. Disconnect gas piping at unit gas valve.
5. Remove wires connected to gas valve. Mark each wire.
6. Remove wires from ignitor and sensor wires at the Integrated Gas Unit Controller (IGC).
7. Remove the 2 screws that attach the burner rack to the
vestibule plate.
8. Slide the burner tray out of the unit (Fig. 46).
9. To reinstall, reverse the procedure outlined above.

ROLLOUT
SWITCH

BURNER
SECTION

FLUE
EXHAUST
VESTIBULE
PLATE
INDUCED-DRAFT
MOTOR
MANIFOLD
PRESSURE TAP

CLEANING AND ADJUSTMENT
1. Remove burner rack from unit as described in Removal
and Replacement of Gas Train section, above.
2. Inspect burners; if dirty, remove burners from rack.
3. Using a soft brush, clean burners and cross-over port as
required.
4. Adjust spark gap. See Fig. 47.
5. Reinstall burners on rack.
6. Reinstall burner rack as described in Removal and Replacement of Gas Train section, this page.

GAS VALVE

Fig. 45 — Burner Section Details

Replacement Parts — A complete list of replacement parts may be obtained from any Carrier distributor upon
request.

Fig. 46 — Burner Tray Details

29

125,000 BTUH INPUT

48TJD008,009

120,000-180,000 BTUH INPUT

48TJD012, 48TJE008,009

180,000-224,000 BTUH INPUT
200,000-250,000 BTUH INPUT

48TJD014; 48TJE012
48TJF008,009
48TJE014; 48TJF012

NOTE: Dimensions in (

) are millimeters.

Fig. 47 — Spark Gap Adjustment

30

TROUBLESHOOTING
Table 17 — LED Error Code Service Analysis
PROBLEM
Hardware failure.
(LED OFF)

CAUSE
Loss of power to control module (IGC).

REMEDY
Check 5-amp fuse on IGC, power to unit, 24-v circuit
breaker, and transformer. Units without a 24-v circuit
breaker have an internal overload in the 24-v transformer. If the overload trips, allow 10 minutes for automatic reset.
Check the operation of the indoor (evaporator) fan motor. Ensure that the supply-air temperature rise is in accordance with the range on the unit nameplate.
Reset unit. If problem persists, replace control board.

Limit switch fault.
(LED 2 flashes)

High temperature limit switch is open.

Flame sense fault.
(LED 3 flashes)
4 consecutive limit
switch trips.
(LED 4 flashes)
Ignition lockout.
(LED 5 flashes)

The IGC sensed flame that should not be present.

Induced-draft motor
fault.
(LED 6 flashes)

IGC does not sense that induced-draft motor is
operating.

Rollout switch fault.
(LED 7 flashes)

Rollout switch has opened.

Internal control fault.
(LED 8 flashes)

Microprocessor has sensed an error in the software or
hardware.

Inadequate airflow to unit.
Unit unsuccessfully attempted ignition for 15 minutes.

LEGEND
IGC — Integrated Gas Unit Controller
LED — Light-Emitting Diode

Check operation of indoor (evaporator) fan motor and
that supply-air temperature rise agrees with range on
unit nameplate information.
Check ignitor and flame sensor electrode spacing, gaps,
etc. Ensure that flame sense and ignition wires are properly terminated. Verify that unit is obtaining proper
amount of gas.
Check for proper voltage. If motor is operating, check
the speed sensor plug/IGC Terminal J2 connection.
Proper connection: PIN 1 — White, PIN 2 — Red, PIN 3
— Black.
Rollout switch will automatically reset, but IGC will continue to lock out unit. Check gas valve operation. Ensure
that induced-draft blower wheel is properly secured to
motor shaft. Reset unit at unit disconnect.
If error code is not cleared by resetting unit power, replace the IGC.

IMPORTANT: Refer to Table 21 — Heating Service Troubleshooting for additional troubleshooting information.

If the IGC must be replaced, be sure to ground yourself to dissipate any electrical charge that may be present before handling new control board. The IGC is sensitive to static electricity
and may be damaged if the necessary precautions are not taken.

31

Table 18 — Durablade Economizer Troubleshooting
PROBLEM
Damper does not
open.

CAUSE
Indoor (evaporator) fan is off.

No power to economizer motor.

Economizer motor failure.
Economizer operation
limited to minimum
position.

OAT or EC set too high.

Verify economizer control board is correctly wired
and works properly.

Check SAT.

Damper does not
close.

Incorrect wiring of economizer.

Verify economizer control board is functioning
properly.

Check SAT.

Economizer motor failure.

Economizer damper
does not close on
power loss.

C1
EC
IFC
IFO
OAT
PL
SAT
SW

—
—
—
—
—
—
—
—

Verify that close-on-power-loss and economizer
control board are functioning properly.

LEGEND
Common Power
Enthalpy Control
Indoor (Evaporator) Fan Contactor
Indoor (Evaporator) Fan On
Outdoor-Air Thermostat
Plug
Supply-Air Thermostat
Economizer Position Switch

32

REMEDY
1. Check to ensure that 24 vac is present at terminal C1 on the IFC or
that 24 vac is present at the IFO terminal. Check whether 24 vac is
present at PL6-1 (red wire) and/or PL6-3 (black wire). If 24 vac is
not present, check wiring (see unit label diagram).
2. Check proper thermostat connection to G on the connection board.
1. Check that SW3 is properly making contact with the damper
blade. Check that SW1 is in the NC (normally closed) position.
2. Check diode D1. If diode is not functioning properly, replace D1.
3. Confirm that the economizer control board is grounded properly at
PL6-4 (brown wire) and at brown terminal of the economizer control
board (brown wire). The economizer motor must also be grounded
properly at the negative motor terminal (brown wire).
4. Verify SW1 and SW3 are working and wired properly (see unit label
diagram).
5. Check for 24 vac input at both PL6-1 (red wire) and PL6-3 (black
wire). If 24 vac not present, check unit wiring (see unit label diagram). If 24 vac is found in both places, check for 24 vac at the yellow terminal of the economizer control board (yellow wire). If
24 vac power is not present, replace the economizer control board.
If the indoor (evaporator) fan and economizer motor are energized,
verify that there is a minimum of 18 vdc at the positive motor terminal.
If the motor is not operating, replace the motor.
1. Set at correct temperature (3 F below indoor space temperature).
2. Check OAT or EC by setting above outdoor temperature or humidity
level. If the OAT or EC switches do not close, replace OAT or EC.
1. Perform the following tests when OAT or EC is closed, Y1 is called
for and damper is at minimum position. Confirm 24 vac on gray terminal of the economizer control board (gray wire). If 24 vac is not
present, check wiring (see unit label diagram).
2. Verify that SW1 and SW3 are wired correctly and working properly
(see unit label diagram).
3. Check to ensure that 24 vac exists at PL6-2 (blue wire). If
24 vac is not present, check wiring (see unit wiring label diagram).
4. Check 24 vac output at PL6-10 (white wire). If 24 vac is not
present, replace economizer control board.
1. After verifying that the OAT and EC settings and the economizer
control board wiring are correct, check to ensure that the 24 vac
terminal of the SAT has 24 vac (white wire). If OAT, EC, and control
board are functioning and wired properly and no 24 vac exists,
check wiring (see unit label diagram).
2. If supply-air temperature is greater than 57 F, 24 vac should be
found at terminal T2 on the SAT (pink wire). If 24 vac is not present,
replace SAT.
1. Verify that SW2 and SW4 are wired and working properly (see unit
label diagram).
2. Check diode D2. If diode is not functioning properly, replace D2.
1. After verifying that the wiring is correct, modulate the damper to the
minimum position. Remove the call for G (evaporator fan).
2. If the damper does not move, check for 24 vac at PL6-1 (red wire).
If 24 vac is not present, check wiring (see unit label diagram).
3. If damper still does not move, check for 24 vac at blue terminal of
economizer control board (blue wire). If 24 vac is not present, replace the economizer circuit board.
1. After verifying that the wiring is correct and the economizer control
board is functioning properly, place the OAT or EC switch in the
closed position. Place a call for Y1 and open the damper to the fully
open position. Confirm that the 24 vac terminal of the SAT has
24 vac (white wire). If 24 vac is not present, check wiring (see unit
label diagram).
2. If supply-air temperature is less than 52 F, 24 vac should be found
at terminal T1 on the SAT (violet wire). If 24 vac not found, replace
SAT.
If economizer control board and SAT are functioning properly, verify
that there is a minimum of 18 vdc at the positive motor terminal. If a
minimum if 18 vdc is present and the motor is still not operating, replace the motor.
1. Check voltage potential across batteries. If lower than 14 vdc, replace close-on-power-loss power supply (9-v alkaline batteries). It is
recommended that you check this emergency power supply on a
regular basis or whenever the filters are changed.
2. If the close-on-power-loss and economizer control board are functioning properly, check for 14 vdc or higher at the blue terminal of
the economizer control board (blue wire) when power is disconnected from unit. If 14 vdc is not present, replace the control board.

Table 19 — PARABLADE Economizer Service Troubleshooting
PROBLEM
Damper does not
open.

CAUSE
Evaporator fan not on.
No power to economizer motor.

Economizer motor failure.
Economizer operation limited to minimum position.

Economizer control module
failure.

Damper does not
close.

No power to economizer.

Spring return failure.
Economizer motor failure.
Damper does not
open or
close according to
enthalpy
readings.

Sensor incorrectly wired or bad.

REMEDY
Check wiring between G on connection board and indoor (evaporator)
fan contactor.
1. Disconnect power at TR and TR1. Disconnect jumper across P
and P1.
2. Connect jumper across TR and 1.
3. Connect jumper across T1 and T.
4. If connected, remove enthalpy sensor from terminals So and +.
Factory-installed 620 ohm resistor should be connected to terminals SR and +.
5. Apply power (24 vac) to terminals TR and TR1. The LED should
be off and the damper should be in the closed position.
6. Disconnect the factory-installed 620 ohm resistor from terminals
SR and +. The LED should light up and the motor should drive towards open. If this does not happen, replace the economizer control module.
If the indoor (evaporator) fan and economizer motor are energized,
verify that there is a minimum of 24 vac at terminals TR and TR1. If
the motor is not operating, replace the motor.
1. To simulate high or low enthalpy, reconnect the factory-installed
620 ohm resistor across terminals SR and +.
2. Connect 1.2 Kohm checkout resistor across terminals So and +.
Turn the enthalpy set point to ‘‘A.’’ The LED should turn on, indicating low enthalpy. The motor should drive towards open. If LED
does not light, replace module. If motor does not drive open, check
motor operation.
3. Turn the enthalpy set point to ‘‘D.’’ The LED should turn off, indicating high enthalpy. The motor should drive towards closed. If
these actions do not occur, replace module.
4. Disconnect 1.2 Kohm checkout resistor before resuming operation.
1. Disconnect power at TR and TR1. Disconnect jumper across P
and P1.
2. Connect jumper across TR and 1.
3. Connect jumper across T1 and T.
4. If connected, remove enthalpy sensor from terminals So and +.
Factory-installed 620 ohm resistor should be connected to terminals SR and +.
5. Apply power (24 vac) to terminals TR and TR1. The LED should
be off and the damper should be in the closed position.
6. Disconnect the factory-installed 620 ohm resistor from terminals
SR and +. The LED should light up and the motor should drive towards open. If this does not happen, replace the economizer control module.
If power to unit is off and damper does not close, check for a bound
linkage. If linkage is not bound, then internal spring may be broken.
Replace actuator.
If the economizer control module is functioning properly, verify that
there is a minimum of 24 vac at terminals TR and TR1. If the motor is
not operating, replace the motor.
To verify sensor operation, reconnect the + lead of the outdoor enthalpy sensor to the + terminal of the economizer control module.
Connect a DC milliammeter between terminals So of the economizer
control module and terminal S of the enthalpy sensor. The milliammeter should indicate between 3 and 25 mA if the sensor is operating
properly. If the milliammeter indicates 0, the sensor may be wired
backwards. If any other readings are shown, replace the sensor.

LEGEND
LED — Light-Emitting Diode

33

Table 20 — Cooling Service Troubleshooting
PROBLEM
Compressor and
condenser fan
will not start.

Compressor will not start
but condenser fan runs.

Compressor cycles
(other than normally
satisfying thermostat).

Compressor makes
excessive noise
(48TJ014 scroll only)
Compressor operates
continuously.

Excessive head pressure.

Head pressure too low.

Excessive suction
pressure.
Suction pressure too low.

Compressor no. 2
will not run.

CAUSE
Power failure.
Fuse blown or circuit breaker tripped.
Defective thermostat, contactor, transformer, or control
relay.
Insufficient line voltage.
Incorrect or faulty wiring.
Thermostat setting too high.
Faulty wiring or loose connections in compressor circuit.
Compressor motor burned out, seized, or internal
overload open.
Defective run/start capacitor, overload, or start relay.
One leg of 3-phase power dead.
Refrigerant overcharge or undercharge.
Defective compressor.
Insufficient line voltage.
Blocked condenser.
Defective run/start capacitor, overload, or start relay.
Defective thermostat.
Faulty condenser-fan motor or capacitor.
Restriction in refrigerant system.
Compressor rotating in wrong direction.
Dirty air filter.
Unit undersized for load.
Thermostat set too low.
Low refrigerant charge.
Leaking valves in compressor.
Air in system.
Condenser coil dirty or restricted.
Dirty air filter.
Dirty condenser coil.
Refrigerant overcharged.
Air in system.
Condenser air restricted or air short-cycling.
Low refrigerant charge.
Compressor valves leaking.
Restriction in liquid tube.
High heat load.
Compressor valves leaking.
Refrigerant overcharged.
Dirty air filter.
Low refrigerant charge.
Metering device or low side restricted.
Insufficient evaporator airflow.
Temperature too low in conditioned area.
Field-installed filter drier restricted.
Unit in economizer mode.

34

REMEDY
Call power company.
Replace fuse or reset circuit breaker.
Replace component.
Determine cause and correct.
Check wiring diagram and rewire correctly.
Lower thermostat setting below room temperature.
Check wiring and repair or replace.
Determine cause. Replace compressor.
Determine cause and replace.
Replace fuse or reset circuit breaker.
Determine cause.
Recover refrigerant, evacuate system, and recharge
to nameplate.
Replace and determine cause.
Determine cause and correct.
Determine cause and correct.
Determine cause and replace.
Replace thermostat.
Replace.
Locate restriction and remove.
Reverse the 3-phase power leads as described
on page 23.
Replace filter.
Decrease load or increase unit size.
Reset thermostat.
Locate leak, repair, and recharge.
Replace compressor.
Recover refrigerant, evacuate system, and recharge.
Clean coil or remove restriction.
Replace filter.
Clean coil.
Remove excess refrigerant.
Recover refrigerant, evacuate system, and recharge.
Determine cause and correct.
Check for leaks, repair, and recharge.
Replace compressor.
Remove restriction.
Check for source and eliminate.
Replace compressor.
Recover excess refrigerant.
Replace filter.
Check for leaks, repair, and recharge.
Remove source of restriction.
Increase air quantity. Check filter and replace if
necessary.
Reset thermostat.
Replace.
Proper operation; no remedy necessary.

Table 21 — Heating Service Troubleshooting
PROBLEM
Burners will not
ignite.

CAUSE
Misaligned spark electrodes.
No gas at main burners.

Water in gas line.
No power to furnace.
No 24 v power supply to control circuit.

Inadequate heating.

Miswired or loose connections
Burned-out heat anticipator in thermostat.
Broken thermostat wires.
Dirty air filter.
Gas input to unit too low.
Unit undersized for application.
Restricted airflow.
Blower speed too low.
Limit switch cycles main burners.
Too much outdoor air.

Poor flame
characteristics.

Incomplete combustion (lack of combustion air)
results in:
Aldehyde odors, CO, sooting flame, or floating flame.

Burners will not
turn off.

Unit is locked into Heating mode for a one minute
minimum.

REMEDY
Check flame ignition and sensor electrode positioning.
Adjust as needed.
Check gas line for air purge as necessary. After purging
gas line of air, allow gas to dissipate for at least 5 minutes before attempting to relight unit.
Check gas valve.
Drain water and install drip leg to trap water.
Check power supply, fuses, wiring, and circuit breaker.
Check transformer. Transformers with internal overcurrent protection require a cool down period before
resetting.
Check all wiring and wirenut connections.
Replace thermostat.
Run continuity check. Replace wires, if necessary.
Clean or replace filter as necessary.
Check gas pressure at manifold. Clock gas meter for
input. If too low, increase manifold pressure, or replace
with correct orifices.
Replace with proper unit or add additional unit.
Clean filter, replace filter, or remove any restrictions.
Use high speed tap, increase fan speed, or install optional blower, as suitable for individual units.
Check rotation of blower, thermostat heat anticipator settings, and temperature rise of unit. Adjust as needed.
Adjust minimum position.
Check economizer operation.
Check all screws around flue outlets and burner compartment. Tighten as necessary.
Cracked heat exchanger.
Overfired unit — reduce input, change orifices, or adjust
gas line or manifold pressure.
Check vent for restriction. Clean as necessary.
Check orifice to burner alignment.
Wait until mandatory one minute time period has
elapsed or power to unit.

LEGEND AND NOTES FOR FIG. 48
IMPORTANT: Refer to unit wiring label for actual unit
wiring information.
AHA
BR
C
CAP
CB
CC
COMP
CR
D
EC
EPS
EQUIP
FPT

—
—
—
—
—
—
—
—
—
—
—
—
—

GND
GVR
HPS
HS
I
IDM
IFC

—
—
—
—
—
—
—

Adjustable Heat Anticipator
Burner Relay
Contactor, Compressor
Capacitor
Circuit Breaker
Cooling Compensator
Compressor Motor
Control Relay
Diode
Enthalpy Control
Economizer Pressure Switch
Equipment
Freeze-Protection
Thermostat
Ground
Gas Valve Relay
High-Pressure Switch
Hall Effect Sensor
Ignitor
Induced-Draft Motor
Indoor (Evaporator) Fan
Contactor

IFM
IGC

— Indoor (Evaporator) Fan Motor
— Integrated Gas Unit
Controller
LED
— Light Emitting Diode
LPS
— Low-Pressure/Loss-of-Charge
Switch
LS
— Limit Switch
MGV — Main Gas Valve
MTR — Motor
OAT — Outdoor Air Thermostat
OFM — Outdoor-Fan Motor
PL
— Plug Assembly
QT
— Quadruple Terminal
R
— Relay
RS
— Rollout Switch
SAT
— Supply Air Thermostat
SEN — Sensor
TC
— Thermostat-Cooling
TH
— Thermostat-Heating
TRAN — Transformer

NOTES:
1. If any of the original wire furnished must be replaced, it must be
replaced with type 90 C wire or its equivalent.
2. Three-phase motors are protected under primary single phasing
conditions.
3. Thermostat: HH07AT170, 172, 174 and P272-2783
Subbase: HH93AZ176, 178 and P272-1882, 1883
4. Set heat anticipator for first stage at 0.14 amp, second stage at
0.2 amp.

Field Splice
Marked Wire
Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Splice
Splice (Marked)
Factory Wiring
Field Control Wiring
Field Power Wiring
Accessory or Optional Wiring
To indicate common potential
only, not to represent wiring

5. Use copper conductors only.
6. TRAN is wired for 230 v unit. If unit is to be run with 208 v power
supply, disconnect BLK wire from 230 v tap (RED) and connect to
200 v tap (BLU). Insulate end of 230 v tap.
7. When economizer assembly is installed move GRA wire from connection board (Y1) to GRA wire from PL6,5; move ORN wire from
connection board (Y2) to ORN wire from PL6,9, on economizer
assembly.

35

Fig. 48 — Typical Wiring Schematic and Component Arrangement
36

Copyright 1996 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
PC 111
Catalog No. 564-934
Printed in U.S.A.
Form 48TJ-13SI
Pg 38
9-96
Replaces: 48TJ-10SI
Tab 1a 6a

MODEL NO.:

SERIAL NO.:

DATE:

TECHNICIAN:

II. PRE-START-UP (insert checkmark in box as each item is completed)
M VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT
M REMOVE SHIPPING TIE DOWN BANDS ON COMPRESSOR (SIZE 014 ONLY) PER INSTALLATION
INSTRUCTIONS
M VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS
M CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS
M CHECK GAS PIPING FOR LEAKS
M CHECK THAT INDOOR-AIR FILTERS ARE CLEAN AND IN PLACE
M VERIFY THAT UNIT INSTALLATION IS LEVEL
M CHECK FAN WHEELS AND PROPELLERS FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW
TIGHTNESS

III. START-UP
ELECTRICAL
SUPPLY VOLTAGE

L1-L2

L2-L3

L3-L1

COMPRESSOR AMPS

L1

L2

L3

COMPRESSOR AMPS

L1

L2

L3

INDOOR-FAN AMPS

L1

L2

L3

TEMPERATURES
OUTDOOR-AIR TEMPERATURE

DB

RETURN-AIR TEMPERATURE

DB

COOLING SUPPLY AIR

DB

GAS HEAT SUPPLY AIR

DB

WB

PRESSURES
GAS INLET PRESSURE

IN. WG

GAS MANIFOLD PRESSURE

IN. WG (HI FIRE)

REFRIGERANT SUCTION

PSIG — CIRCUIT NO. 1

PSIG — CIRCUIT NO. 2

REFRIGERANT DISCHARGE

PSIG — CIRCUIT NO. 1

PSIG — CIRCUIT NO. 2

M VERIFY REFRIGERANT CHARGE USING CHARGING TABLES
M VERIFY THAT 3-PHASE SCROLL COMPRESSOR ROTATING IN CORRECT DIRECTION (48TJ014 ONLY)

Copyright 1996 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
PC 111
Catalog No. 564-934
Printed in U.S.A.
Form 48TJ-13SI
Pg CL-1
9-96
Replaces: 48TJ-10SI
Tab 1a 6a

CUT ALONG DOTTED LINE

I. PRELIMINARY INFORMATION

CUT ALONG DOTTED LINE

(Remove and Store in Job File)

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

START-UP CHECKLIST



---

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Create Date                     : 1996:11:19 17:13:25Z
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