48TJE/TJF004
48TJD/TJE/TJF005-007
Single-Package Rooftop Heating/Cooling Units
Installation, Start-Up, and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
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 . . . . . . . . . . . . . . . . . . . 4
Step 6 — Install Gas Piping . . . . . . . . . . . . . . . . . . . 4
Step 7 — Make Electrical Connections . . . . . . . . 4
• DISCONNECT BOX LOCATION
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
• HEAT ANTICIPATOR SETTINGS
Step 8 — Make Outdoor-Air Adjustments and
Install Outdoor-Air Hood . . . . . . . . . . . . . . . . . . 13
• MANUAL OUTDOOR-AIR DAMPER
• OPTIONAL VARISLIDE™ ECONOMIZER
• OPTIONAL PARABLADE ECONOMIZER
Step 9 — Adjust Evaporator-Fan Speed . . . . . . 18
• DIRECT DRIVE MOTORS
• BELT DRIVE MOTORS
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27,28
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-33
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 34-40
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 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
field-supplied 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.
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, not
to the unit. The accessory thru-the-bottom power connection
package must be installed before the unit is set on the roof
curb. If field installed (through the roof curb) gas connections are desired, use factory supplied 3⁄4 in. pipe coupling
and gas plate assembly to mount the through the roof curb
connection to the roof curb. Gas connections and power connections to the unit must be field installed after the unit is
installed on the 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 result in air leaks and poor unit
performance.
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. 534-852
Printed in U.S.A.
Form 48TJ-9SI
Pg 1
8-95
Replaces: 48TJ-3SI
Tab 1a 6a
Fig. 1 — Horizontal Conversion Panels
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.
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 bottom connection to the side connection. See Fig. 4A. 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. 4B. 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 should be 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 2.20 in. wg with
PARABLADE, economizer 2.35 in. wg with Varislide™
economizer or 2.45 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. 5 for additional
information.
Lifting holes are provided in base rails as shown in
Fig. 6. Refer to rigging instructions on unit.
All panels must be in place when rigging.
2
CONNECTION SIZES
UNIT
SIZE
48TJ
D ALT ‘‘E’’
CONNECTOR
DRAIN GAS
POWER CONTROL
PACKAGE
HOLE
ACCESSORY
11
3⁄49
3⁄49
1⁄29
13⁄49
CRBTMPWR001A00
004-007 18-9 ⁄169 18-49
[551]
[406] [44.5] NPT
NPT
NPT
(Thru-the-Bottom)
B
C
ROOF CURB
ACCESSORY
‘‘A’’
UNIT SIZE
48TJ
CRRFCURB001A00
18-29
[356]
28-09
[610]
004-007
CRRFCURB002A00
NOTES:
1. Roof curb accessory is shipped unassembled.
2. Insulated panels.
3. Dimensions in [ ] are in millimeters.
4. Roof Curb: galvanized steel.
5. Attach ductwork to curb. (Flanges of duct rest
on curb.)
6. Service clearance is 4 ft on each side.
7.
Direction of airflow.
Fig. 2 — Roof Curb Dimensions
3
For natural gas applications, gas pressure at unit gas connection must not be less than 4 in. wg or greater than
13.0 in. wg while unit is operating. On 48TJ005,006,007 high
heat units, the gas pressure at unit gas connection must not
be less than 5 in. wg or greater than 13 in. wg while the unit
is operating. For propane applications, the gas pressure must
not be less than 5 in. wg or greater than 13 in. wg at the unit
connection.
Size gas supply piping for 0.5 in. wg maximum pressure
drop. Do not use supply pipe smaller than unit gas connection. Support gas piping as shown in the table in Fig. 8. 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, a 48-ft long
pipe would have a minimum of 6 support beams.
See Fig. 8 for typical pipe guide and locations of external
manual main shutoff valve.
POSITIONING — Maintain clearance around and above unit
to provide minimum distance from combustible materials,
proper airflow, and service access. See Fig. 6. A properly
positioned unit will have the following clearances between
unit and roof curb: 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.)
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 such that snow will not block
the combustion intake or flue outlet.
Unit may be installed directly on wood flooring or on Class
A, B, or C roof-covering material when roof curb is used.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
Flue vent discharge must have a minimum horizontal clearance of 4 ft from electric and gas meters, gas regulators, and
gas relief equipment.
Minimum distance between unit and other electrically live
parts is 48 inches.
Flue gas can deteriorate building materials. Orient unit such
that flue gas will not affect building materials.
Adequate combustion-air space must be provided for
proper operation of this equipment. Be sure that installation
complies with all local codes and Section 5.3, Air for
Combustion and Ventilation, NFGC (National Fuel Gas
Code), and ANSI (American National Standards Institute)
Z223.1, and NFPA (National Fire Protection Association)
54 TIA-54-84-1. In Canada, installation must be in accordance with the CAN1-B149 installation codes for gas burning appliances.
After unit is in position, remove rigging skids and shipping materials.
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.
DISCONNECT BOX LOCATION — The field-supplied disconnect box may be mounted on the unit’s end panel or on
the corner post. Mount disconnect box on the left side of the
rating plate when mounting on the unit’s end panel. Do not
mount the disconnect box over the unit rating plate. When
mounting disconnect box on corner post, secure disconnect
box to corner post and condenser coil top cover. See Fig. 7.
A disconnect box mounting space is available when an
optional or accessory condenser coil grille is used. Mount
the disconnect on the sheet metal provided with the condenser coil grille. The sheet metal is located adjacent to the
corner post on the left side of the power wiring access panel.
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. 7.
Step 6 — Install Gas Piping — Unit is equipped for
use with type of gas shown on nameplate. Refer to local building codes, or in the absence of local codes, to ANSI Z223.1
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.
4
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 orange wire on the transformer and connecting it to the 200-v red wire from the transformer. The
end of the orange wire must then be insulated.
Refer to unit label diagram for additional information. Wiring leads are provided for field service. Use copper conductors only when splice connectors are used.
When installing units, provide a disconnect per NEC.
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 1.
Install field wiring as follows:
1. Connect ground lead to chassis ground connection when
using separate ground ties.
2. Install conduit between disconnect and side panel. Insert
conduit through power supply knockout opening. See
Fig. 9.
3. Connect power lines to power wiring leads.
4. Pigtails are provided for field power connections and are
located inside the burner access panel. See Fig. 10 and
11. Use factory-supplied splices or Underwriters’ Laboratories (UL) approved copper connector.
NOTE: For wire runs up 50 ft, use no. 18 AWG (American
Wire Gage) insulated wire (35 C minimum). For 50 to 75 ft,
use no. 16 AWG insulated wire (35 C minimum). For over
75 ft, use no. 14 AWG insulated wire (35 C 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.
Feed control wires through the raceway located between
the condenser coil top cover and burner side panel. See
Fig. 10. Connect control wires to corresponding screw terminals, the low-voltage connections located inside lowvoltage access panel. See Fig. 12 for connections. The lowvoltage connections provide the UL required clearance between
high- and low-voltage wiring.
HEAT ANTICIPATOR SETTINGS — Set heat anticipator
settings at .14 amp for the first stage and .14 amp for secondstage heating, when available.
Voltage to compressor terminals during operation must be
within voltage range indicated on unit nameplate (see
Table 2). On 3-phase units, voltages between phases must be
balanced within 2% and the current within 10%. Use the formula shown in the legend for Table 2, Note 2 to determine
the percent 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.
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. Connect thermostat wires to terminal board.
Route thermostat cable or equivalent single leads of colored wire from subbase terminals through connector on unit
to low-voltage connections (shown in Fig. 12).
MAXIMUM ALLOWABLE DIFFERENCE
(in.)
A-B
0.5
B-C
1.0
A-C
1.0
Fig. 3 — Unit Leveling Tolerances
5
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4-in. trap is recommended.
Fig. 4B — External Trap Condensate Drain
NOTE: Drain plug is shown in factory-installed position.
Fig. 4A — Internal Trap Condensate Drain
3. Unit weights do not include economizer. See Table 1 for economizer weights.
NOTES:
1. Dimensions in ( ) are 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.
UNIT
48TJE/TJF004
48TJD/TJE/TJF005
48TJD/TJE/TJF006
48TJD/TJE/TJF007
MAX
WEIGHT
Lb
Kg
510
231
520
236
540
245
615
279
All panels must be in place when rigging.
‘‘A’’
‘‘B’’
‘‘C’’
in.
mm
in.
mm
in.
mm
73.69
1872
37.50
953
33.35
847
Fig. 5 — Rigging Details
6
Table 1 — Physical Data
BASE UNIT 48
NOMINAL CAPACITY (tons)
OPERATING WEIGHT (lb)
Unit
Varislide™ Economizer
PARABLADE Economizer
Roof Curb
COMPRESSOR
Quantity
Oil (oz)
REFRIGERANT TYPE
Operating Charge
(lb-oz)
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
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.)
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.)
TJE/TJF004
3
460
34
42
115
TJD/TJE/TJF005
4
470
490
34
34
42
42
115
115
Hermetic (Reciprocating)
1
1
50
50
R-22
1
50
3-6
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
Std
Alt
TJD/TJE/TJF006
5
TJD/TJE/TJF007
6
565
34
42
115
1
65
4-11
5-13
9-0
Enhanced Copper Tubes, Aluminum Lanced Fins
1...17
1...17
1...17
2...17
7.36
11.39
13.19
10.42
Propeller Type
3500
4000
4000
4000
1...22.0
1...22.0
1...22.0
1...22.0
1⁄4...1100
1⁄4...1100
1⁄4...1100
1⁄4...1100
325
325
325
325
Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol™ Feed Device
2...15
2...15
3...15
4...15
4.17
5.5
5.5
5.5
Centrifugal Type
1...10 x 10
1...10 x 10
1...11 x 10
1...10 x 10
1...10 x 10
1...10 x 10
1...10 x 10
—
Direct
Direct
Direct
Belt
Belt
Belt
Belt
—
1200
1600
2000
2400
1200
1600
2000
—
.34
.75
1.20
2.40
1.00
1.00
1.80
—
48
48
48
56
48
48
56
—
860/800
1075/970
1075/970
—
—
—
—
—
—
—
—
1070-1460
760-1090
840-1185
900-1300
—
Ball
Ball
Ball
Ball
2100
2100
2100
2100
—
—
—
2.8/3.8
1.9/2.9
1.9/2.9
2.4/3.4
—
1 ⁄2
1 ⁄2
1⁄2
5 ⁄8
1 ⁄2
1 ⁄2
1⁄2
—
—
—
—
4.5
4.5
4.0
4.5
—
—
—
—
1...A...40
1...A...39
1...A...36
1...A...39
—
—
—
—
14.7-15.5
10.0-12.4
10.0-12.4
14.7-15.5
—
—
—
—
80
65
70
80
—
—
—
—
5
5
5
5
—
—
—
—
3
3
3
3
—
—
—
—
1225
890
980
1060
—
5 ⁄8
5 ⁄8
5⁄8
5 ⁄8
LEGEND
Bhp — Brake Horsepower
*Rollout switch is manual reset.
†The 48TJD005-007 and 48TJE004 (74,000 Btuh) units have 2 burners. The 48TJE005007 and 48TJF004 (115,000 Btuh) units and the 48TJF005-007 (150,000 Btuh) units have 3
burners.
**Indicates a FIOP (factory-installed option).
††Requires an optional/accessory controls upgrade kit.
7
Table 1 — Physical Data (cont)
BASE UNIT 48
FURNACE SECTION
Rollout Switch Cutout Temp (F)*
Burner Orifice Diameter (in. ...drill size)†
Natural Gas
Liquid Propane**
Thermostat Heat Anticipator Setting (amps)
208/230/460 v Stage 1
Stage 2
Gas Input (Btuh) Stage 1
Stage 2
TJE/TJF004
TJD/TJE/TJF005
TJD/TJE/TJF006
TJD/TJE/TJF007
195
195
195
195
.113...33
.113...33/
.113...33/
.129...30
.082...45/
.082...45/
.102...38
.113...33/
.113...33/
.129...30
.082...45/
.082...45/
.102...38
.113...33/
.113...33/
.129...30
.082...45/
.082...45/
.102...38
.14
.14
74,000/
115,000/
120,000
—/
—/
150,000
.14
.14
74,000/
115,000/
120,000
—/
—/
150,000
.14
.14
74,000/
115,000/
120,000
—/
—/
150,000
80
25-55/
55-85
80
25-55/
35-65/
50-80
80
25-55/
35-65/
50-80
80
25-55/
35-65/
50-80
3.5
3.5
1
1 ⁄2
3.5
3.5
1
1 ⁄2
3.5
3.5
1
1⁄2
3.5
3.5
1
1⁄2
.082...45
.14
.14
74,000/
82,000
—/
115,000
Efficiency (Steady State) (%)
Temperature Rise Range
Manifold Pressure (in. wg)
Natural Gas
Liquid Propane**
Gas Valve Quantity
Field Gas Connection Size (in.)
HIGH-PRESSURE SWITCH (psig)††
Standard Compressor
Internal Relief (Differential)
Cutout
Reset (Auto.)
LOW-PRESSURE/LOSS-OF-CHARGE SWITCH
(psig)††
Cutout
Reset (Auto.)
FREEZE-PROTECTION THERMOSTAT (F)††
Opens
Closes
OUTDOOR-AIR INLET SCREENS
Quantity...Size (in.)
RETURN-AIR FILTERS
Quantity...Size (in.)
450 ± 50
500 ± 50
428
320
428
320
7±3
22 ± 7
30 ± 5
45 ± 5
Cleanable
1...20 x 24 x 1
Throwaway
2...16 x 25 x 2
LEGEND
Bhp — Brake Horsepower
*Rollout switch is manual reset.
†The 48TJD005-007 and 48TJE004 (74,000 Btuh) units have 2 burners. The 48TJE005007 and 48TJF004 (115,000 Btuh) units and the 48TJF005-007 (150,000 Btuh) units have 3
burners.
**Indicates a FIOP (factory-installed option).
††Requires an optional/accessory controls upgrade kit.
8
UNIT
48TJF/TJE004
48TJD/TJE/TJF005
48TJD/TJE/TJF006
48TJD/TJE/TJF007
ECONOMIZER WEIGHT
STD. UNIT
WEIGHT
Varislide™
Lb
460
470
490
565
Lb
34
34
34
34
Kg
209
213
222
256
Kg
15.4
15.4
15.4
15.4
PARABLADE
Lb
42
42
42
42
Kg
19.1
19.1
19.1
19.1
CORNER CORNER CORNER
WEIGHT
WEIGHT
WEIGHT
(A)
(B)
(C)
Lb
Kg
Lb
Kg
Lb
Kg
140 63.5 105 47.6 159 72.1
142 64.4 106 48.1 162 73.5
150 68.0 115 52.2 160 72.6
165 74.8 136 61.7 200 90.7
CORNER
WEIGHT
(D)
Lb Kg
56 25.4
60 27.2
65 29.5
64 29.0
LEGEND
LED — Light-Emitting Diode
*Indicates horizontal center of gravity.
†Indicates vertical center of gravity.
NOTES:
1. Dimensions in [ ] are in millimeters.
2.
Center of Gravity.
3.
Direction of airflow.
4. On vertical discharge units, ductwork should be attached to accessory roof
curb only. For horizontal discharge units, field-supplied flanges should be
attached to horizontal openings. All ductwork should be attached to the flanges.
5. Minimum clearances (local codes or jurisdiction may prevail):
a. Between unit, flue side, and combustible surfaces, 36 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 baserail.
A
B
C
CONNECTION SIZES
11⁄169 Dia. (27) Field Power Supply Hole
3⁄49−14 NPT Condensate Drain
1⁄29−14 NPT Gas Connection
Fig. 6 — Base Unit Dimensions
9
CONDENSER
COIL
TOP COVER
CORNER POST
END PANEL
Fig. 7 — Flue Hood Details
Fig. 9 — Conduit Installation
LEGEND
NFGC — National Fuel Gas Code
*Field supplied.
NOTE: Follow all local codes.
SPACING OF SUPPORTS
STEEL PIPE
NOMINAL
DIAMETER
(in.)
1⁄2
3⁄4 or 1
11⁄4 or larger
X
DIMENSIONS
(feet)
6
8
10
LEGEND
IGC — Integrated Gas Unit Controller
LED — Light-Emitting Diode
Fig. 8 — Gas Piping Guide (With Accessory
Thru-the-Curb Service Connections)
Fig. 10 — Component Location
10
208/230-1-60
208/230-3-60
460-3-60
(SIZE 007 ONLY)
575-3-60
(SIZE 007 ONLY)
C
COMP
NEC
TB
—
—
—
—
208/230-3-60
575-3-60, 460-3-60
(SIZES 004-006)
LEGEND
Contactor
Compressor
National Electrical Code
Terminal Block
Fig. 11 — Power Wiring Connections
LEGEND
AHA — Adjustable Heat Anticipator TH — Thermostat-Heating
Field Wiring
CC — Cooling Compensator
Factory Wiring
TC
— Thermostat-Cooling
NOTES:
1. Connect Y2 when unit is equipped with an economizer.
2. Connect W2 when unit is equipped with two stages of heat.
Fig. 12 — Low-Voltage Connections
11
Table 2 — Electrical Data
UNIT
NOMINAL
V-PH-HZ
208/230-1-60
48TJ004
(3 Tons)
208/230-3-60
460-3-60
575-3-60
208/230-1-60
48TJ005
(4 Tons)
208/230-3-60
460-3-60
575-3-60
208/230-1-60
48TJ006
(5 Tons)
208/230-3-60
460-3-60
575-3-60
48TJ007
(6 Tons)
208/230-3-60
460-3-60
575-3-60
IFM
TYPE
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
Std
Std
VOLTAGE
RANGE
COMPR
(each)
OFM
IFM
FLA
2.8
4.9
2.8
4.9
1.3
2.1
1.3
2.1
3.5
4.9
3.5
4.9
1.8
2.1
1.8
2.1
5.9
8.8
5.9
5.8
3.2
2.6
3.2
2.6
5.8
2.6
2.6
Min
Max
RLA
LRA
FLA
187
254
16.9
86.7
1.4
187
254
11.7
65.1
1.4
414
508
5.1
32.8
0.8
518
632
4.1
37.0
0.8
187
254
23.0
110.0
1.4
187
254
15.3
92.0
1.4
414
508
7.0
46.0
0.8
518
632
5.8
44.0
0.8
187
254
30.5
141.0
1.4
187
254
17.7
110.0
1.4
414
508
8.6
55.0
0.8
518
632
6.4
50.0
0.8
187
414
518
254
508
632
20.9
9.9
7.9
142.0
72.0
58.0
1.4
0.6
0.6
COMBUSTION
FAN
MOTOR
FLA
.57
.57
.30
.30
.57
.57
.30
.30
.57
.57
.30
.30
.57
.30
.30
POWER SUPPLY
MCA
25.3/25.3
27.4/27.4
18.8/18.8
20.9/20.9
8.5
9.3
7.4
6.7
33.7/33.7
35.1/35.1
24.0/24.0
25.4/25.4
11.4
11.7
9.3
9.6
42.7/42.7
48.3/48.3
29.4/29.4
29.3/29.3
14.8
14.2
12.0
11.4
33.3/33.3
15.6
14.4
MOCP†
35/35
35/35
25/25
25/25
15
15
15
15
40/40
40/40
30/30
30/30
15
15
15
15
50/50
60/60
35/35
35/35
20
20
15
15
40/40
20
15
DISCONNECT
SIZE*
FLA
24/24
27/27
18/18
21/21
8
9
7
7
32/32
34/34
23/23
25/25
11
11
9
9
43/43
47/47
29/29
29/29
15
14
12
12
32/32
15
12
LRA
97/97
102/102
76/76
80/80
38
41
32
32
122/122
125/125
104/104
107/107
52
54
49
51
155/155
178/178
124/124
145/145
63
73
52
62
187/187
94
76
EXAMPLE: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
452 + 464 + 455
Average Voltage =
3
1371
=
3
= 457
IMPORTANT: Optional, alternate evaporator-fan motor and drive
are not available for 48TJ007 units. Contact your local Carrier
representative for more information about field-installed
motors.
LEGEND
COMPR — Compressor
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
*Used to determine minimum disconnect per NEC.
†Fuse or HACR circuit breaker.
NOTE: The 575-v units are CSA only.
Determine maximum deviation from average voltage.
(AB) 457 − 452 = 5 v
(BC) 464 − 457 = 7 v
(AC) 457 − 455 = 2 v
Maximum deviation is 7 v.
Determine 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 Standards Association (CSA) 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.
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.
% Voltage Imbalance
max voltage deviation from average voltage
= 100 x
average voltage
12
5. Place hood on front of evaporator coil access panel. See
Fig. 14 for hood details. Secure top of hood with the
4 screws removed in Step 3. See Fig. 15.
6. Remove and save 6 screws (3 on each side) from sides of
the manual outdoor-air damper.
7. Align screw holes on hood with screw holes on side of
manual outdoor-air damper. See Fig. 14 and 15. Secure
hood with 6 screws from Step 6.
8. Adjust minimum position setting of the damper blade by
adjusting the manual outdoor-air adjustment screws on
the front of the damper blade. See Fig. 13. Slide blade
vertically until it is in the appropriate position determined by Fig. 16. Tighten screws.
9. Remove and save screws currently on sides of hood. Insert screen. Secure screen to hood using the screws. See
Fig. 15.
Step 8 — Make Outdoor-Air Adjustments and
Install Outdoor-Air Hood
MANUAL OUTDOOR-AIR DAMPER — The outdoor-air
hood and screen are attached to the basepan at the bottom of
the unit for shipping.
Assembly:
1. Determine quantity of ventilation required for building.
Record amount for use in Step 8.
2. Remove and save evaporator coil access panel and screws.
See Fig. 13.
3. Separate hood and screen from basepan by removing the
4 screws securing them. Save all screws.
4. Replace evaporator coil access panel.
Fig. 15 — Outdoor-Air Damper with
Hood Attached
Fig. 13 — Damper Panel with Manual Outdoor-Air
Damper Installed
Fig. 14 — Outdoor-Air Hood Details
Fig. 16 — Position Setting
13
OPTIONAL VARISLIDE ™ 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 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.
Save panels and screws. See Fig. 17. Remove optional
outdoor-air damper hood package from filter section.
8. 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.
9. Fasten hood top and side plate assembly (Fig. 18) to
outdoor-air opening panel with screws provided.
10. Place knob supplied with economizer on OAT. See
Fig. 23. 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. 23.
11. Connect OAT per Fig. 24.
12. Slide outdoor-air inlet screen into screen track on hood
side plate. While holding screen in place, fasten screen
retainer to hood using screws provided.
NOTE: Refer to Fig. 25 for economizer barometric relief damper
characteristics.
CONTROL BOX
PANEL
FILTER
ACCESS
PANEL
Fig. 17 — Typical Access Panel Locations
3. Assemble outdoor-air hood top and side plates as shown
in Fig. 18. Install seal strips on hood top and sides. Put
aside screen retainer and screws for later assembly. Do
not attach hood to unit at this time.
4. To convert to horizontal discharge application:
a. Rotate economizer 90 degrees until the economizer
motor faces the condenser section (see Fig. 19).
b. Rotate the barometric relief damper cover 90
degrees.
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. 20.
5. Insert economizer plug into economizer harness. Remove tape from barometric relief damper. See Fig. 21.
6. If ventilation air is not required, proceed to Step 8. If
ventilation air is required, determine minimum position
setting for required airflow. See Fig. 22. Adjust minimum position setting by adjusting the screws on the position setting bracket. Slide bracket until the top screw
is in the position determined by Fig. 22. Tighten screws.
7. Remove tape from outdoor-air thermostat (OAT). Fasten OAT to inside of hood using screws and speed clips
provided. See Fig. 23. Make sure OAT terminals are
positioned up.
Fig. 18 — Outdoor-Air Hood Details
ECONOMIZER
CONTROL
BOARD
BAROMETRIC
RELIEF
DAMPER
ECONOMIZER
PLUG
ECONOMIZER
MOTOR
Fig. 19 — Horizontal Varislide™ Economizer
Installation
14
Fig. 20 — Horizontal Discharge Block-Off Plate
U-SHAPED
HOLE
(NOT
SHOWN)
ECONOMIZER
CONTROL
ECONOMIZER
BOARD
PLUG
ECONOMIZER
MOTOR
TOP
SCREW
WIRING
HARNESS
BAROMETRIC
RELIEF DAMPER
POSITION SETTING
BRACKET
Fig. 21 — Varislide™ Economizer Installed in Unit
C
SO
D
TR
REV. B 1 9 8 8 1 8 A
B
S
5
4
2
T1
P1
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
EXAMPLE:
Given — Negative Pressure . . . . . . . . . . . . . . . . . . 0.2 in. wg
Outdoor Air . . . . . . . . . . . . . . . . . . . . . . . . 900 cfm
Determine — Setting = 5 in.
1
P
T
MINIMUM 3
POSITION
OPEN
REV.
97-3672
Fig. 23 — Outdoor-Air Thermostat/Enthalpy
Control Installation
Fig. 22 — Varislide Economizer Minimum Position
Setting
15
5. If ventilation air is not required, proceed to Step 6. 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 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 (T2), and temperature of the entering
outside air (T1). Cfm1 is the outside air (minimum)
cfm.
Insert the data into the following equations:
T1 (cfm1) + T2 (cfm2)
= T3
cfm3
cfm2 = (cfm3 − cfm1)
LEGEND
OAT — Outdoor-Air Thermostat
NOTE: See unit wiring diagram for details.
Fig. 24 — Wiring Connections for Outdoor-Air
Thermostat
Therefore:
T1 (cfm1) + T2 (cfm3 − cfm1)
= T3
cfm3
Further derivation reveals the following formula for
airflow:
(T3 − T2) cfm3
cfm1 =
(T1 − T2)
Use this equation to determine cfm1, which is the minimum airflow across the economizer.
Fig. 25 — Varislide™ Economizer Barometric Relief
Damper Characteristics
If cfm1 does not match the desired minimum airflow
from Step 1, readjust the minimum position setting screw.
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 minimum amount to be supplied by each unit
and record quantity of ventilation air needed for use in
Step 5.
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. 17.
3. Assemble outdoor-air hood top and side plates as shown
in Fig. 18. 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. Insert economizer plug into economizer harness. Remove tape from barometric relief damper. See Fig. 26.
Fig. 26 — PARABLADE Economizer Installed
in Unit
16
6. Determine the enthalpy changeover set point from
Fig. 27. 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. 27.
7. 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. 28.
CONTROL
CURVE
A
B
C
D
8. Fasten hood top and side plate assembly (Fig. 29) to outdoorair opening panel with screws provided.
9. Slide outdoor-air inlet screen into screen track on hood
side plate. While holding screen in place, fasten screen
retainer to hood using screws provided. See Fig. 30.
NOTE: Refer to Fig. 31 for PARABLADE economizer barometric relief damper characteristics.
CONTROL POINT
(APPROX. DEG.)
AT 50% RH
73 (23)
70 (21)
67 (19)
63 (17)
Fig. 29 — Outdoor-Air Hood Installed
on Unit
RH — Relative Humidity
Fig. 27 — Enthalpy Settings for PARABLADE
Economizer
Fig. 30 — Filter Installed on Outdoor-Air
Hood
Fig. 28 — Panel Reinstalled on Unit
17
unit. If other than factory setting is desired, refer to label
diagram for motor reconnection. See Fig. 32 for direct drive
motor location.
BELT DRIVE MOTORS — Fan motor pulleys are factory
set for speed shown in Table 1. See Fig. 33 for belt drive
motor location.
NOTE: Before adjusting fan speed, make sure the new fan
speed will provide an air temperature rise range as shown in
Table 1.
To change fan speed:
1. Shut off unit power supply.
2. Loosen belt by loosening fan motor mounting nuts. See
Fig. 33.
3. Loosen movable pulley flange setscrew (see Fig. 34).
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.)
Fig. 31 — PARABLADE Economizer Barometric
Relief Damper Characteristics
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
performance. Refer to Tables 5-18 to determine fan speed
settings.
DIRECT DRIVE MOTORS — The evaporator-fan motor factory speed setting is shown on label diagram affixed to base
MOTOR MOUNTING
NUTS AND BOLTS
Fig. 33 — Belt Drive Motor Mounting
Fig. 34 — Evaporator-Fan Pulley Adjustment
Fig. 32 — Direct Drive Motor Mounting
18
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.
To adjust belt tension:
1. Loosen fan motor mounting nuts.
2. Slide motor mounting plate away from fan scroll for proper
belt tension (1⁄2-in. deflection with one finger).
3. Tighten motor mounting nuts.
4. Adjust bolt and tighten nut to secure motor in fixed
position.
Table 3 — Fan Rpm at Motor Pulley Settings*
UNIT
48TJ
004†
005†
006†
007**
0
1090
1185
1300
1460
⁄
1055
1150
1260
1420
12
1
1025
1115
1220
1380
1 1 ⁄2
990
1080
1180
1345
MOTOR PULLEY TURNS OPEN
2
21⁄2
3
960
925
890
1045
1015
980
1140
1100
1060
1305
1265
1225
31⁄2
860
945
1020
1185
4
825
910
980
1150
41⁄2
795
875
940
1110
5
760
840
900
1070
*Approximate fan rpm shown.
†Indicates alternate motor and drive package.
**Indicates standard motor and drive package.
Table 4 — Motor Data
UNIT
48TJ
EVAPORATOR-FAN
MOTOR
MAXIMUM
CONTINUOUS
BHP*
MAXIMUM
OPERATING
WATTS*
Std
.34
440
Alt
1.00
1000
Std
.75
850
Alt
1.00
1000
Std
1.20
1340
Alt
1.80
1921
Std
2.40
2120
004
005
006
007
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.
†Single-phase motor.
**3-phase motor.
19
UNIT
VOLTAGE
MAXIMUM AMP
DRAW
208/230
460
575
208/230
460
575
208/230
460
575
208/230
460
575
208/230
570
575
208/230†
208/230**
460
575
208/230
460
575
2.9
1.4
1.4
5.1
2.3
2.3
3.7
1.9
1.9
5.1
2.3
2.3
6.2
3.4
3.4
9.2
6.1
4.7
4.7
6.1
2.7
2.7
Table 5 — Fan Performance, 48TJE/TJF004 Vertical Discharge Units;
Standard Motor (Direct)
AIRFLOW
(Cfm)
900
1000
1100
1200
1300
1400
1500
208 v
Esp
0.49
0.42
0.37
0.33
0.27
0.20
0.16
LOW SPEED
230, 460, 575 v
Watts
Esp
Watts
253
0.50
277
270
0.43
292
287
0.38
307
304
0.33
323
321
0.28
338
338
0.23
354
355
0.18
369
LEGEND
Esp — External Static Pressure (in. wg)
208 v
Esp
0.51
0.43
0.39
0.34
0.28
0.25
0.20
HIGH SPEED
230, 460, 575 v
Watts
Esp
Watts
307
0.55
363
321
0.51
374
335
0.46
385
349
0.40
397
364
0.34
408
378
0.29
420
392
0.23
431
be affected. For additional information on motor performance, refer to Table 4.
3. To convert watts to bhp:
watts input x motor efficiency
bhp =
746
Motor efficiency = .63
NOTES:
1. Values include losses for filters, unit casing, and wet coils.
2. 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 wattage ratings shown will not result in
nuisance tripping or premature motor failure. Unit warranty will not
Table 6 — Fan Performance, 48TJE/TJF004 Vertical Discharge Units;
Alternate Motor (Belt)
AIRFLOW
(Cfm)
900
1000
1100
1200
1300
1400
1500
AIRFLOW
(Cfm)
900
1000
1100
1200
1300
1400
1500
0.1
Rpm Watts
581
119
644
189
687
219
733
259
754
288
810
348
841
418
0.2
Rpm Watts
673
179
709
219
746
259
785
318
826
378
868
448
911
527
EXTERNAL STATIC
0.9
1.0
Rpm Watts Rpm Watts
1039
448
1061
487
1061
507
1086
547
1090
577
1109
607
1109
647
1156
676
1152
716
1190
756
1181
806
1237
845
1225
895
1271
945
EXTERNAL STATIC
0.3
0.4
Rpm Watts Rpm Watts
736
219
805
249
782
279
835
298
806
298
867
348
843
348
903
408
891
428
942
477
937
507
984
567
985
607
1029
656
PRESSURE (in.
1.1
Rpm Watts
1083
527
1111
587
1127
637
1203
706
1228
796
1293
885
1317
995
wg)
Rpm
911
937
964
994
1047
1067
1109
0.6
Watts
338
378
398
497
597
666
766
Rpm
957
992
1013
1045
1075
1110
1150
0.7
Watts
388
438
487
557
637
726
816
Rpm
988
1039
1068
1090
1122
1160
1190
0.8
Watts
428
487
547
637
696
766
855
wg)
Rpm
1105
1136
1145
1250
1266
1349
1363
1.2
Watts
567
627
666
736
836
925
1044
NOTES:
1. Boldface indicates a field-supplied drive is required. (See
Note 6.)
2.
PRESSURE (in.
0.5
Rpm Watts
865
288
900
348
929
398
960
467
991
527
1032
617
1073
716
4. Values include losses for filters, unit casing, and wet coils.
5. Use of a field-supplied motor may affect wire sizing. Contact
Carrier representative to verify.
6. Alternate motor drive range: 760 to 1090. All other rpms require
field-supplied drive.
7. To convert watts to bhp:
watts input x motor efficiency
bhp =
746
Motor efficiency = .75
indicates field-supplied motor and drive are required.
3. Maximum usable watts input is 1000. 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
wattage ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Table 4.
20
Table 7 — Fan Performance, 48TJD/TJE/TJF005 Vertical Discharge Units;
Standard Motor (Direct)
AIRFLOW
(Cfm)
1200
1300
1400
1500
1600
1700
1800
1900
2000
208 v
Esp
0.68
0.61
0.53
0.45
0.36
0.26
0.15
0.04
—
LOW SPEED
230, 460, 575 v
Watts
Esp
Watts
458
0.74
506
471
0.67
521
503
0.59
556
536
0.51
593
557
0.42
616
584
0.32
646
610
0.22
674
629
0.11
696
—
—
—
LEGEND
208 v
Esp
0.74
0.66
0.59
0.52
0.45
0.37
0.30
0.23
0.16
HIGH SPEED
230, 460, 575 v
Watts
Esp
Watts
572
0.85
632
589
0.78
651
616
0.70
681
631
0.63
698
654
0.56
723
678
0.48
750
698
0.41
772
720
0.34
796
744
0.26
823
be affected. For additional information on motor performance, refer to Table 4.
3. To convert watts to bhp:
watts input x motor efficiency
bhp =
746
Motor efficiency = .66
Esp — External Static Pressure (in. wg)
NOTES:
1. Values include losses for filters, unit casing, and wet coils.
2. 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 wattage ratings shown will not result in
nuisance tripping or premature motor failure. Unit warranty will not
Table 8 — Fan Performance, 48TJD/TJE/TJF005 Vertical Discharge Units;
Alternate Motor (Belt)
AIRFLOW
(Cfm)
1200
1300
1400
1500
1600
1700
1800
1900
2000
AIRFLOW
(Cfm)
1200
1300
1400
1500
1600
1700
1800
1900
2000
EXTERNAL STATIC
0.3
0.4
Rpm Watts Rpm Watts
722
320
779
378
754
378
809
441
788
441
840
504
822
510
873
578
871
588
907
662
907
678
941
757
929
772
976
851
965
877
1011
967
1002
993
1046 1082
0.1
Rpm Watts
596
210
633
252
672
315
711
368
751
441
791
515
831
609
872
704
913
809
0.2
Rpm Watts
665
263
699
315
735
378
770
441
840
515
873
599
881
693
919
788
958
904
1.0
Rpm Watts
1028
725
1058
841
1086
885
1113
985
1141 1084
1171
1194
1202 1313
1232 1442
1262 1572
EXTERNAL STATIC
1.1
1.2
Rpm Watts Rpm Watts
1056
751 1083
778
1090
888 1121
935
1120
950 1153
976
1147 1054 1180 1081
1174
1134 1207 1196
1203 1278 1235 1310
1233 1398 1263 1425
1263 1532 1294 1559
1294 1671 1325 1702
PRESSURE (in.
1.4
Rpm Watts
1134
935
1171
988
1210 1071
1241 1215
1269 1339
1296 1463
1323 1597
1351 1731
1382 1884
NOTES:
1. Boldface indicates a field-supplied drive is required. (See
Note 6.)
2.
PRESSURE (in.
0.6
Rpm Watts
872
504
902
578
933
651
963
725
993
787
1024
889
1057
991
1091 1104
1125 1237
wg)
Rpm
915
943
972
1002
1033
1064
1095
1127
1160
0.7
Watts
567
641
720
804
869
976
1078
1191
1323
Rpm
957
984
1011
1041
1072
1103
1132
1162
1195
0.8
Watts
630
704
788
858
950
1063
1165
1277
1410
Rpm
993
1021
1049
1077
1107
1137
1167
1197
1229
0.9
Watts
678
772
837
922
998
1128
1239
1360
1491
wg)
Rpm
1185
1219
1257
1295
1326
1354
1381
1408
1436
1.6
Watts
935
1001
1105
1294
1454
1605
1747
1889
2040
Rpm
1231
1268
1307
1339
1376
1407
1436
1463
1489
1.8
Watts
869
1029
1190
1350
1558
1738
1907
2068
2229
4. Values include losses for filters, unit casing, and wet coils.
5. Use of a field-supplied motor may affect wire sizing. Contact
Carrier representative to verify.
6. Alternate motor drive range: 840 to 1185. All other rpms require
field-supplied drive.
7. To convert watts to bhp:
watts input x motor efficiency
bhp =
746
Motor efficiency = .75
indicates field-supplied motor and drive are required.
3. Maximum usable watts input is 1000. 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
wattage ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Table 4.
21
Table 9 — Fan Performance, 48TJD/TJE/TJF006 Vertical Discharge Units;
Standard Motor (Direct)
AIRFLOW
(Cfm)
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
LOW SPEED
208 v
230, 460, 575 v
Esp
Watts
Esp
Watts
0.69
750
1.01
791
0.49
780
0.85
824
0.29
810
0.70
857
0.09
839
0.54
891
—
—
0.39
924
—
—
0.23
957
—
—
0.08
990
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
MEDIUM
208 v
Esp
Watts
1.00
782
0.85
821
0.70
861
0.55
900
0.40
940
0.25
979
0.10
1018
—
—
—
—
—
—
—
—
LEGEND
Esp — External Static Pressure (in. wg)
SPEED
230, 460,
Esp
1.20
1.06
0.93
0.80
0.67
0.54
0.41
0.28
0.15
0.02
—
575 v
Watts
845
883
921
959
997
1035
1073
1111
1149
1187
—
HIGH SPEED
208 v
230, 460,
Esp
Watts
Esp
1.22
875
1.28
1.09
913
1.17
0.97
950
1.06
0.84
988
0.95
0.72
1025
0.84
0.59
1063
0.73
0.46
1101
0.62
0.34
1138
0.51
0.21
1176
0.40
0.09
1213
0.29
—
—
0.18
575 v
Watts
949
988
1027
1066
1105
1144
1183
1222
1261
1300
1340
be affected. For additional information on motor performance, refer to Table 4.
3. To convert watts to bhp:
watts input x motor efficiency
bhp =
746
Motor efficiency = .67
NOTES:
1. Values include losses for filters, unit casing, and wet coils.
2. 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 wattage ratings shown will not result in
nuisance tripping or premature motor failure. Unit warranty will not
Table 10 — Fan Performance, 48TJD/TJE/TJF006 Vertical Discharge Units;
Alternate Motor (Belt)
AIRFLOW
(Cfm)
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
0.1
Rpm Watts
729
368
770
429
811
511
852
593
893
695
935
797
977
910
1019 1042
1061 1185
1103 1328
1145 1492
0.2
Rpm Watts
788
429
826
501
864
582
903
674
942
777
982
889
1022 1012
1063 1145
1104 1288
1145 1441
1186 1604
0.4
Rpm Watts
896
572
930
654
964
736
999
838
1035
940
1070 1063
1107 1196
1144 1328
1182 1502
1220 1645
1259 1819
EXTERNAL STATIC PRESSURE (in. wg)
0.6
0.8
1.0
Rpm Watts Rpm Watts Rpm Watts
981
705 1070
869 1144 1032
1015
797 1098
961 1173 1134
1051
899 1124 1053 1203 1237
1085 1001 1155 1155 1231 1349
1119 1124 1191 1288 1256 1461
1153 1247 1227 1431 1287 1604
1187 1380 1260 1574 1323 1758
1222 1523 1294 1737 1359 1931
1258 1686 1328 1901 1393 2115
1293 1860 1362 2074 1426 2310
1329 2044 1397 2269 1460 2504
1.4
Rpm Watts
1301 1492
1318 1523
1335 1615
1361 1747
1391 1891
1420 2034
1449 2187
1474 2350
1502 2518
1540 2720
1581 2948
1.6
Rpm Watts
1380 1757
1392 1800
1408 1850
1423 1952
1448 2095
1477 2258
1509 2420
1538 2578
1561 2732
1590 2900
1629 3113
4. Values include losses for filters, unit casing, and wet coils.
5. Use of a field-supplied motor may affect wire sizing. Contact
Carrier representative to verify.
6. Alternate motor drive range: 900 to 1300. All other rpms require
field-supplied drive.
7. To convert watts to bhp:
watts input x motor efficiency
bhp =
746
Motor efficiency = .74
NOTES:
1. Boldface indicates a field-supplied drive is required. (See
Note 6.)
2.
1.2
Rpm Watts
1226 1216
1242 1308
1270 1420
1300 1553
1329 1676
1355 1809
1381 1952
1413 2126
1449 2310
1485 2524
1522 2739
indicates field-supplied motor and drive are required.
3. Maximum usable watts input is 1921. 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
wattage ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Table 4.
22
Table 11 — Fan Performance, 48TJD/TJE/TJF007 Vertical Discharge Units;
Standard Motor (Belt)
AIRFLOW
(Cfm)
1800
1900
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000
AIRFLOW
(Cfm)
1800
1900
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000
0.1
Rpm
942
982
1022
1063
1104
1130
1174
1201
1246
1285
1304
1345
1378
0.2
Watts
700
779
867
998
1081
1140
1224
1335
1482
1595
1639
1814
2032
1.2
Rmp
1395
1430
1459
1489
1528
1561
1584
1633
1675
—
—
—
—
Watts
1301
1404
1482
1595
1726
1884
2015
2232
2436
—
—
—
—
Rpm
978
1023
1068
1115
1159
1202
1237
1272
1320
1361
1402
1446
1489
Watts
646
739
835
916
1039
1156
1258
1361
1491
1613
1726
1910
2084
EXTERNAL STATIC PRESSURE (in. wg)
0.4
0.6
Rpm
Watts
Rpm
Watts
1063
771
1147
891
1097
843
1175
1006
1132
924
1218
1106
1180
1056
1261
1207
1214
1148
1310
1353
1248
1233
1358
1499
1292
1378
1392
1604
1335
1517
1427
1718
1368
1604
1458
1823
1400
1691
1490
1936
1439
1840
1543
2145
1477
1989
1585
2335
1529
2223
1598
2444
EXTERNAL STATIC PRESSURE (in. wg)
1.4
1.6
Rpm
Watts
Rpm
Watts
1475
1387
1542
1517
1504
1499
1556
1613
1532
1613
1588
1744
1567
1761
1626
1910
1603
1919
1666
2093
1637
2076
1710
2272
1671
2249
1756
2467
1698
2405
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
NOTES:
1. Boldface indicates a field-supplied drive is required. (See
Note 6.)
2.
0.8
Rpm
1248
1266
1303
1340
1375
1410
1460
1518
1562
1602
1642
—
—
1.0
Watts
1081
1156
1258
1361
1447
1526
1683
1910
2136
2326
2512
—
—
Rpm
1322
1356
1397
1428
1459
1488
1532
1575
1620
1666
—
—
—
Watts
1190
1310
1353
1473
1595
1709
1892
2076
2283
2504
—
—
—
1.8
Rpm
1609
1655
1675
1684
1711
1760
1825
—
—
—
—
—
—
Watts
1648
1840
1919
2067
2241
2442
2664
—
—
—
—
—
—
4. Values include losses for filters, unit casing, and wet coils.
5. Use of a field-supplied motor may affect wire sizing. Contact
Carrier representative to verify.
6. Standard motor drive range: 1070 to 1460. All other rpms require
field-supplied drive.
7. To convert watts to bhp:
watts input x motor efficiency
bhp =
746
Motor efficiency = .84
indicates field-supplied motor and drive are required.
3. Maximum usable watts input is 2120. 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
wattage ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Table 4.
Table 12 — Fan Performance, 48TJE/TJF004 Horizontal Discharge Units;
Standard Motor (Direct)
AIRFLOW
(Cfm)
900
1000
1100
1200
1300
1400
1500
208 v
Esp
0.54
0.49
0.43
0.39
0.33
0.26
0.21
LOW SPEED
230, 460, 575 v
Watts
Esp
Watts
253
0.57
277
270
0.51
292
287
0.45
307
304
0.40
323
321
0.35
338
338
0.28
354
355
0.23
369
LEGEND
Esp — External Static Pressure (in. wg)
NOTES:
1. Values include losses for filters, unit casing, and wet coils.
2. 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 wattage ratings shown will not result in
nuisance tripping or premature motor failure. Unit warranty will not
208 v
Esp
0.55
0.52
0.46
0.38
0.35
0.29
0.24
HIGH SPEED
230, 460, 575 v
Watts
Esp
Watts
307
0.60
363
321
0.53
374
335
0.49
385
349
0.43
397
364
0.36
408
378
0.32
420
392
0.25
431
be affected. For additional information on motor performance, refer to Table 4.
3. To convert watts to bhp:
watts input x motor efficiency
bhp =
746
Motor efficiency = .63
23
Table 13 — Fan Performance, 48TJE/TJF004 Horizontal Discharge Units;
Alternate Motor (Belt)
AIRFLOW
(Cfm)
900
1000
1100
1200
1300
1400
1500
AIRFLOW
(Cfm)
900
1000
1100
1200
1300
1400
1500
0.1
Rpm Watts
526
70
570
109
614
149
658
189
703
239
725
288
755
328
0.2
Rpm Watts
584
99
627
149
670
189
710
229
752
269
776
308
816
378
EXTERNAL STATIC
0.9
1.0
Rpm Watts Rpm Watts
989
388
1028
438
1020
438
1064
477
1052
487
1100
527
1076
527
1136
577
1090
607
1172
647
1108
666
1208
706
1117
696
1245
776
EXTERNAL STATIC PRESSURE (in. wg)
0.3
0.4
0.5
0.6
Rpm Watts Rpm Watts Rpm Watts Rpm Watts
656
139
734
219
818
269
875
269
738
189
800
259
848
288
895
308
758
229
812
288
863
308
914
348
780
279
840
318
889
358
938
398
808
318
868
368
916
408
963
448
845
378
891
418
937
467
983
507
870
428
924
477
969
527
1014
577
PRESSURE (in.
1.1
Rpm Watts
1074
487
1124
537
1163
587
1201
647
1239
716
1278
786
1315
865
Rpm
924
936
960
988
1012
1027
1056
0.7
Watts
308
348
388
448
507
557
627
Rpm
953
977
1005
1038
1061
1071
1097
0.8
Watts
348
388
428
497
557
597
676
wg)
Rpm
1120
1185
1225
1266
1306
1347
1385
1.2
Watts
537
597
647
716
786
865
955
NOTES:
1. Boldface indicates a field-supplied drive is required. (See
Note 4.)
2. Maximum usable watts input is 1000. 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
wattage ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Table 4.
3. Values include losses for filters, unit casing, and wet coils.
4. Alternate motor drive range: 760 to 1090. All other rpms require
field-supplied drive.
5. To convert watts to bhp:
watts input x motor efficiency
bhp =
746
Motor efficiency = .75
Table 14 — Fan Performance, 48TJD/TJE/TJF005 Horizontal Discharge Units;
Standard Motor (Direct)
AIRFLOW
(Cfm)
1200
1300
1400
1500
1600
1700
1800
1900
2000
208 v
Esp
0.75
0.68
0.60
0.51
0.42
0.32
0.21
0.09
—
LOW SPEED
230, 460, 575 v
Watts
Esp
Watts
458
0.81
506
471
0.74
521
503
0.66
556
536
0.58
593
557
0.49
616
584
0.39
646
610
0.29
674
629
0.18
696
—
0.06
731
LEGEND
Esp — External Static Pressure (in. wg)
NOTES:
1. Values include losses for filters, unit casing, and wet coils.
2. 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 wattage ratings shown will not result in
nuisance tripping or premature motor failure. Unit warranty will not
be affected. For additional information on motor performance, refer to Table 4.
208 v
Esp
0.87
0.79
0.71
0.64
0.56
0.48
0.41
0.33
0.26
HIGH SPEED
230, 460, 575 v
Watts
Esp
Watts
572
0.92
632
589
0.85
651
616
0.77
681
631
0.70
698
654
0.63
723
678
0.55
750
698
0.48
772
720
0.41
796
744
0.33
823
3. To convert watts to bhp:
watts input x motor efficiency
bhp =
746
Motor efficiency = .66
24
Table 15 — Fan Performance, 48TJD/TJE/TJF005 Horizontal Discharge Units;
Alternate Motor (Belt)
AIRFLOW
(Cfm)
1300
1400
1500
1600
1700
1800
1900
2000
2100
AIRFLOW
(Cfm)
1300
1400
1500
1600
1700
1800
1900
2000
2100
EXTERNAL STATIC PRESSURE (in. wg)
0.1
0.2
0.3
0.4
0.6
0.7
Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts
569
189
641
242
701
299
761 357
859
483
901
546
604
231
673
294
731
352
788 410
887
546
928
615
640
284
705
347
761
410
817 473
914
620
955
688
676
336
738
399
793
468
847 536
940
683
982
767
713
399
772
462
825
536
877 609
967
767 1009
851
750
473
806
536
857
615
908 693
997
851 1037
940
788
546
841
620
890
704
939 788 1026
956 1065 1040
826
630
876
714
924
799
971 883 1056 1061 1094 1151
864
735
912
809
958
898 1004 988 1087 1177 1125 1271
1.1
Rpm Watts
1068
792
1086
833
1104
925
1129 1022
1156 1150
1183 1262
1211 1390
1238 1548
1265 1666
EXTERNAL STATIC PRESSURE (in. wg)
1.2
1.4
1.6
Rpm Watts Rpm Watts Rpm Watts
1106
889 1134
998 1189 1138
1128
930 1183 1052 1226 1215
1139 1012 1218 1090 1286 1282
1162 1114 1228 1186 1303 1339
1188 1226 1250 1291 1319 1444
1215 1339 1276 1415 1334 1569
1243 1461 1303 1540 1359 1702
1271 1594 1330 1664 1386 1846
1298 1727 1358 1808 1413 1989
0.9
Rpm Watts
987
652
1006
709
1033
797
1060
891
1087
998
1114 1108
1141 1221
1168 1371
1197 1485
1.0
Rpm Watts
1030
695
1044
736
1069
838
1095
930
1123 1073
1151 1185
1178 1318
1204 1502
1231 1604
1.8
Rpm Watts
1245 1358
1297 1406
1320 1463
1343 1530
1382 1607
1398 1722
1418 1865
1439 2018
1466 2171
NOTES:
1. Boldface indicates a field-supplied drive is required. (See
Note 6.)
2.
0.8
Rpm Watts
943
609
968
683
996
757
1024
851
1051
935
1077 1030
1104 1124
1132 1240
1162 1366
4. Values include losses for filters, unit casing, and wet coils.
5. Use of a field-supplied motor may affect wire sizing. Contact
Carrier representative to verify.
6. Alternate motor drive range: 840 to 1185. All other rpms require
field-supplied drive.
7. To convert watts to bhp:
watts input x motor efficiency
bhp =
746
Motor efficiency = .75
indicates field-supplied motor and drive are required.
3. Maximum usable watts input is 1000. 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
wattage ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Table 4.
Table 16 — Fan Performance, 48TJD/TJE/TJF006 Horizontal Discharge Units;
Standard Motor (Direct)
AIRFLOW
(Cfm)
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
LOW SPEED
208 v
230, 460, 575 v
Esp
Watts
Esp
Watts
0.74
750
1.06
791
0.54
780
0.90
824
0.34
810
0.75
857
0.14
839
0.59
891
—
—
0.44
924
—
—
0.28
957
—
—
0.13
990
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
MEDIUM
208 v
Esp
Watts
1.07
782
0.92
821
0.77
861
0.62
900
0.47
940
0.32
979
0.17
1018
0.02
1058
—
—
—
—
—
—
LEGEND
Esp — External Static Pressure (in. wg)
NOTES:
1. Values include losses for filters, unit casing, and wet coils.
2. 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 wattage ratings shown will not result in
nuisance tripping or premature motor failure. Unit warranty will not
be affected. For additional information on motor performance, refer to Table 4.
SPEED
230, 460,
Esp
1.27
1.13
1.00
0.87
0.74
0.61
0.48
0.35
0.22
0.09
—
575 v
Watts
845
883
921
959
997
1035
1073
1111
1149
1187
—
HIGH SPEED
208 v
230, 460,
Esp
Watts
Esp
1.26
875
1.33
1.14
913
1.22
1.01
950
1.11
0.89
988
1.00
0.77
1025
0.89
0.64
1063
0.78
0.51
1101
0.67
0.39
1138
0.56
0.26
1176
0.45
0.14
1213
0.34
—
—
0.23
3. To convert watts to bhp:
watts input x motor efficiency
bhp =
746
Motor efficiency = .67
25
575 v
Watts
949
988
1027
1066
1105
1144
1183
1222
1261
1300
1340
Table 17 — Fan Performance, 48TJD/TJE/TJF006 Horizontal Discharge Units;
Alternate Motor (Belt)
AIRFLOW
(Cfm)
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
AIRFLOW
(Cfm)
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
0.1
Rpm
730
770
811
852
894
936
978
1021
1064
1107
1150
0.2
Watts
357
420
494
578
567
778
893
1019
1156
1303
1460
1.2
Rpm
1221
1252
1278
1303
1330
1362
1393
1423
1454
1485
1518
Watts
1229
1334
1439
1555
1671
1818
1965
2122
2291
2480
2679
Rpm
789
826
865
905
945
984
1024
1064
1104
1145
1186
Watts
420
483
567
651
757
862
977
1103
1240
1387
1555
EXTERNAL STATIC PRESSURE (in. wg)
0.4
0.6
Rpm
Watts
Rpm
Watts
896
557
990
704
931
641
1020
788
966
725
1051
883
1002
820
1084
977
1037
925
1119
1093
1072
1030
1154
1219
1108
1156
1192
1355
1145
1282
1225
1503
1183
1429
1260
1650
1222
1524
1296
1818
1262
1765
1331
1986
EXTERNAL STATIC PRESSURE (in. wg)
1.4
1.6
Rpm
Watts
Rpm
Watts
1256
1366
1283
1387
1311
1524
1340
1660
1345
1650
1397
1849
1371
1776
1433
1996
1396
1902
1460
2133
1422
2038
1485
2270
1452
2185
1510
2427
1483
2354
1538
2585
1515
2532
1571
2758
1544
2721
1604
2947
1574
2905
1633
3134
NOTES:
1. Boldface indicates a field-supplied drive is required. (See
Note 6.)
2.
0.8
Rpm
1072
1101
1133
1163
1194
1226
1259
1294
1330
1365
1400
1.0
Watts
872
956
1061
1156
1271
1397
1545
1702
1870
2038
2227
Rpm
1153
1178
1205
1235
1266
1297
1327
1359
1392
1426
1461
Watts
1051
1145
1240
1355
1471
1608
1744
1902
2070
2259
2459
1.8
Rpm
1303
1330
1424
1480
1517
1544
1570
1594
1623
1657
1692
Watts
1282
1692
1986
2196
2364
2522
2674
2821
2976
3152
3345
4. Values include losses for filters, unit casing, and wet coils.
5. Use of a field-supplied motor may affect wire sizing. Contact
Carrier representative to verify.
6. Alternate motor drive range: 900 to 1300. All other rpms require
field-supplied drive.
7. To convert watts to bhp:
indicates field-supplied motor and drive are required.
3. Maximum usable watts input is 1921. 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
wattage ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Table 4.
bhp =
watts input x motor efficiency
746
Motor efficiency = .74
Table 18 — Fan Performance, 48TJD/TJE/TJF007 Horizontal Discharge Units;
Standard Motor (Belt)
AIRFLOW
(Cfm)
1800
1900
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000
0.1
Rpm Watts
885
623
928
700
971
787
1015
891
1060
998
1104 1123
1138 1165
1183 1275
1210 1404
1254 1560
1274 1613
1318 1726
1362 1945
0.2
Rpm Watts
942
700
982
779
1022
867
1063
998
1104 1081
1130 1140
1174 1224
1201 1335
1246 1482
1285 1595
1304 1639
1345 1814
1378 2032
0.4
Rpm Watts
1047
835
1084
932
1121 1014
1140 1064
1159 1106
1196 1224
1245 1396
1284 1465
1312 1560
1354 1726
1374 1875
1412 2050
1451 2119
EXTERNAL STATIC PRESSURE (in. wg)
0.6
0.8
1.0
Rpm Watts Rpm Watts Rpm Watts
1139
956 1193 1031 1276 1165
1160 1006 1223 1114 1301 1233
1188 1097 1254 1216 1329 1284
1196 1140 1272 1292 1354 1404
1229 1258 1306 1361 1363 1508
1264 1387 1340 1473 1397 1648
1305 1447 1373 1630 1440 1726
1338 1552 1402 1761 1469 1805
1366 1735 1435 1858 1494 1936
1403 1892 1474 1954 1536 2171
1459 1989 1514 2136 1570 2343
1496 2240 1529 2300 1603 2521
1534 2343 1560 2470 1611 2648
NOTES:
1. Boldface indicates a field-supplied drive is required. (See
Note 6.)
2.
1.2
Rpm Watts
1341 1250
1374 1361
1396 1473
1413 1552
1434 1604
1459 1665
1502 1823
1524 1980
1552 2119
1584 2300
1624 2504
1671 2725
1690 2886
1.4
Rpm Watts
1413 1378
1437 1439
1460 1491
1475 1534
1487 1639
1520 1831
1552 1980
1585 2136
1616 2317
1646 2487
1677 2661
—
—
—
—
1.6
Rpm Watts
1474 1404
1490 1482
1509 1569
1529 1700
1554 1831
1576 1980
1604 2136
1638 2292
1671 2462
1706 2653
—
—
—
—
—
—
4. Values include losses for filters, unit casing, and wet coils.
5. Use of a field-supplied motor may affect wire sizing. Contact
Carrier representative to verify.
6. Standard motor drive range: 1070 to 1460. All other rpms require
field-supplied drive.
7. To convert watts to bhp:
watts input x motor efficiency
bhp =
746
Motor efficiency = .84
indicates field-supplied motor and drive are required.
3. Maximum usable watts input is 2120. 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
wattage ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Table 4.
26
Refer to Table 19 for the correct orifice to use at high
altitudes.
START-UP
Unit Preparation — Make sure that unit has been installed in accordance with these installation instructions and
applicable codes.
Table 19 — Altitude Compensation*
Return-Air Filters — Make sure correct filters are installed in filter tracks. See Table 1. Do not operate unit without return-air filters.
ELEVATION
(ft)
Compressor Mounting — Compressors are internally spring mounted. Do not loosen or remove compressor
holddown bolts.
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
Internal Wiring — Check all electrical connections in
unit control boxes. Tighten as required.
Refrigerant Service Ports — To service refrigerant
service ports, remove refrigerant service port access panel.
See Fig. 35. Each unit 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. When a controls upgrade package is
used, one Schrader-type valve is located under both the highpressure switch and the low-pressure switch.
74,000 AND 115,000 BTUH
NOMINAL INPUT
Natural
Liquid
Gas
Propane
Orifice
Orifice
Size†
Size†
33
45
34
46
35
47
36
47
36
47
37
48
37
48
38
49
39
49
41
50
43
50
44
51
44
51
45
52
150,000 BTUH
NOMINAL INPUT
Natural
Liquid
Gas
Propane
Orifice
Orifice
Size†
Size†
30
38
30
39
31
40
32
41
33
42
34
43
35
43
36
44
37
44
38
45
39
45
40
46
41
47
42
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.
†Orifices available through your Carrier distributor.
Heating
1. Purge gas supply line of air by opening union ahead of
gas valve. If gas odor is detected, tighten union and wait
5 minutes before proceeding.
2. Turn on electrical supply and 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 burner does not light, then there is a
22-second delay before another 5-second try. If the burner
still does not light, the time delay is repeated. If the burner
does 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
thermostat temperature is satisfied.
8. Adjust airflow to obtain a temperature rise within the range
specified on the unit nameplate.
Fig. 35 — Cleaning Condenser Coil
Cooling — Set space thermostat to OFF position. 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 30.
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.
NOTE: The default value for the evaporator-fan motor
ON/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 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.
Main Burners — Main burners are factory set and should
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 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.)
27
When the outdoor-air temperature is below the OAT setting and the thermostat calls for cooling, the economizer damper
moves to the minimum position. If the supply-air temperature is above 57 F, the damper continue 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 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 moves to the fully closed
position when using AUTO. fan or to the minimum position
when using continuous fan.
If the outdoor air alone cannot satisfy the cooling requirements of the conditioned space, economizer cooling is integrated with mechanical cooling, providing, two stages of
cooling. Compressor and the condenser fan will be energized and the position of the economizer damper will be determined by the supply-air temperature. 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. When the first stage of cooling is
satisfied, there is a 30-second delay before the evaporator
fan shuts off. The damper then moves to the fully closed position. When using a continuous fan, the damper moves to
the minimum position.
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 is energized to start the compressor and the outdoor (condenser) fan motor. The indoor (evaporator) fan motor is energized and the economizer damper moves to the
minimum position. 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 along
cannot satisfy the cooling requirements, economizer cooling
is integrated with mechanical cooling. 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. To prevent thermostat short-cycling, the unit is locked into the Heating
mode for at least 1 minute when W1 is energized. The induceddraft motor is 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 energized
and the high-fire solenoid on the main gas valve (MGV) is
energized. When the thermostat is satisfied and W1 is 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.
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 temporarily shut unit off until space temperature falls below thermostat setting.
Safety Relief — A soft solder joint at the suction service
Schrader port provides pressure relief under abnormal temperature and pressure conditions (i.e., fire in building).
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, and the indoor (evaporator) fan motor (IFM), compressor, and outdoor (condenser) fan motor (OFM) start. The
OFM runs continuously while the unit is in cooling. When
the thermostat is satisfied, compressor contactor (C) is deenergized and the compressor and OFM shut off. After a
30-second delay, the 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.
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 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 is deenergized, the IFM stops after
a 45-second time-off delay.
COOLING, UNITS WITH VARISLIDE™ ECONOMIZER
— When the outdoor-air temperature is above the outdoorair thermostat (OAT) setting and the room thermostat calls
for cooling, compressor contactor is energized to start compressor and the outdoor (condenser) fan motor (OFM). The
indoor (evaporator) fan motor (IFM) is energized and the
economizer damper moves to the minimum position. After
the thermostat is satisfied, there is a 30-second delay before
the evaporator fan turns off. The damper then moves to the
fully closed position. When using continuous fan, the damper
moves to the minimum position.
28
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 heating and cooling season and as operating conditions require.
EVAPORATOR COIL
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 14
and 16 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. Flush condensate pan after completion.
5. Reinstall economizer and filters.
6. Reconnect wiring.
7. Replace access panels.
CONDENSER COIL — Inspect coil monthly. Clean condenser coil annually, and as required by location and outdoor air conditions.
One-Row Coil Cleaning (sizes 004-006) — To access onerow coils, remove screws securing condenser-fan grille to
condenser fan top cover. Place grille on top of condenser fan
top cover as shown in Fig. 36. It is not necessary to remove
the top cover.
Use a water hose or other suitable equipment to remove
dirt and debris. Clean the outer surfaces with a stiff brush in
the normal manner.
Reverse the procedure outlined above to reinstall the
condenser-fan grille and condenser fan top cover.
2-Row Coil Cleaning (size 007)
NOTE: Save all screws removed in this section. The screws
must be used when reinstalling the equipment.
1. To access 2-row coils, remove screws securing condenserfan grille to condenser coil top cover. Place grille on top
of condenser fan top cover as shown in Fig. 36 and 37.
It is not necessary to remove the top cover.
2. Remove 3 screws on right side of compressor access panel.
Remove one screw securing condenser coil top cover to
compressor access panel. Remove lower screw securing
condenser coil to compressor mounting plate.
3. Remove 4 screws securing control box access panel. Remove three screws (located in front of the control box
access cover) securing condenser coil top cover.
4. Remove screws securing low-voltage access panel. Remove 2 screws inside low-voltage access panel. Tilt sheet
metal (located on left side of low-voltage connections)
back 45 degrees.
5. Remove screw securing refrigerant service port access
panel.
6. Remove 2 wire ties securing 2-row coils together at hairpin end.
7. Remove screws securing two corner posts. Remove two
corner posts.
8. Use right corner post to prop up right side of condenser
coil top cover. Slide condenser coil partially out of condenser fan housing. See Fig. 37.
Fig. 36 — Coil Cleaning
Fig. 37 — Propping Up Condenser Coil
Top Cover
9. Use left corner post to prop up left side of condenser
coil top cover.
10. Carefully separate the outer coil section 3 to 4 in. from
the inner coil section. See Fig. 38.
11. 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.
12. Secure inner and outer coils together with 2 wire ties.
13. Reposition the outer and inner coil section.
14. Reverse the procedure outlined above to reinstall
equipment.
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.
OUTDOOR-AIR INLET SCREENS — Clean screens with
steam or hot water and a mild detergent. Do not use disposable filters in place of screens.
29
Fig. 39 — Condenser-Fan Adjustment
LOW-CHARGE COOLING — Using Cooling Charging
Charts, Fig. 40-43, vary refrigerant until the conditions of
the appropriate chart are met. Note the charging charts are
different from type normally used. 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 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 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. 42)
Outdoor Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 85 F
Suction Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 psig
Suction Temperature should be . . . . . . . . . . . . . . . . . . 60 F
(Suction Temperature may vary 5 F.)
Fig. 38 — 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.
Manual Outdoor-Air Damper — If outdoor-air damper
blade adjustment is required, see Manual Outdoor-Air Damper
section on page 13.
Economizer Adjustment — Refer to Optional Economizer sections on page 14 and 16.
Condenser-Fan Adjustment (Fig. 39) — Shut off
unit power supply. Remove condenser-fan assembly (grille,
motor, and fan) and loosen fan hub setscrews. Adjust fan
height as shown in Fig. 39. Tighten setscrews and replace
condenser-fan assembly.
If Chargemaster® charging device is used, temperature and
pressure readings must be accomplished using the charging
chart.
Refrigerant Charge — Amount of refrigerant charge
is listed on unit nameplate (also refer to Table 1). Refer to
Carrier GTAC2-5 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.)
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 on page 32.
2. Remove the flue cover to inspect the heat exchanger.
3. Clean all surfaces as required using a wire brush.
30
Fig. 40 — Cooling Charging Chart, 48TJ004
Fig. 42 — Cooling Charging Chart, 48TJ006
Fig. 41 — Cooling Charging Chart, 48TJ005
Fig. 43 — Cooling Charging Chart, 48TJ007
31
Combustion-Air Blower — Clean periodically to as-
Main Burners — To access burners, remove burner access panel and slide out burner partition. See Fig. 9. 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.
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 access burner section, slide the sliding burner partition
out of the unit.
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 7 screws that attach induced-draft motor housing to vestibule plate (Fig. 44).
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 the
motor 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.
When working on gas train, do not hit or plug orifice
spuds.
REMOVAL AND REPLACEMENT OF GAS TRAIN
(Fig. 44 - 46.)
1. Shut off manual gas valve.
2. Shut off power to unit.
3. Slide out burner partition. See Fig. 9.
4. Disconnect gas piping at unit gas valve.
5. Remove wires connected to gas valve. Mark each wire.
6. Remove ignitor wires and sensor wires at the Integrated
Gas Unit Controller (IGC) (see Fig. 10).
7. Remove the 2 screws that attach the burner rack to the
vestibule plate (Fig. 44).
8. Slide the burner tray out of the unit (Fig. 45).
9. To reinstall, reverse the procedure outlined above.
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. 46.
5. Reinstall burners on rack.
6. Reinstall burner rack as described in Removal and
Replacement of Gas Train section, above.
Limit Switch — Remove blower access panel (Fig. 6).
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. 10). IGC contains a self-diagnostic LED (light-emitting diode). A single
LED on the IGC provides a visual display of operational
or sequential problems when the power supply is uninterrupted. When a break in power occurs, the IGC will be
reset (resulting in a loss of fault history) and the indoor (evaporator) fan ON/OFF times will be reset. The LED error code
can be observed through the viewport. During servicing refer to the label on the control box cover or Table 20 for an
explanation of LED error code descriptions.
If lockout occurs, unit may be reset by interrupting power
supply to unit for at least 5 seconds.
Replacement Parts — A complete list of replacement
parts may be obtained from any Carrier distributor upon
request.
Table 20 — LED Error Code Description*
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
ROLLOUT
SWITCH
INDUCEDDRAFT
MOTOR
MOUNTING
PLATE
BURNER
SECTION
LEGEND
FLUE
EXHAUST
VESTIBULE
PLATE
INDUCEDDRAFT
MOTOR
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.
BLOWER
HOUSING
MANIFOLD
PRESSURE
TAP
GAS
VALVE
Fig. 44 — Burner Section Details
IMPORTANT: Refer to Troubleshooting Tables 21-25 for additional information.
32
Fig. 45 — Burner Tray Details
LOW HEAT
48TJE004, 48TJD005-007 — 74,000 BTUH INPUT
MEDIUM AND HIGH HEAT
48TJE005-007, 48TJF004 — 115,000 BTUH INPUT
48TJF005-007 — 150,000 BTUH INPUT
Fig. 46 — Spark Adjustment
33
TROUBLESHOOTING
Table 21 — 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.
Inadequate airflow to unit.
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.
Unit unsuccessfully attempted ignition for 15 minutes.
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 lockout 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 22 — Heating Service Analysis
for additional troubleshooting analysis.
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.
LEGEND
IGC — Integrated Gas Unit Controller
LED — Light-Emitting Diode
34
Table 22 — Heating Service Analysis
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.
35
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 wire nut 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 reset power to unit.
Table 23 — Cooling Service Analysis
PROBLEM
Compressor and condenser
fan will not start.
Compressor will not start
but condenser fan runs.
Compressor cycles (other
than normally satisfying
thermostat).
Compressor operates continuously.
Excessive head
pressure.
Head pressure too low.
Excessive suction pressure.
Suction pressure too low.
Evaporator fan will not shut
off.
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, start relay.
One leg of three-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.
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 head 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.
Outdoor ambient below 25 F.
Time off delay not finished.
36
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.
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.
Recover 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.
Install low-ambient kit.
Wait for 30-second off delay.
Table 24 — Varislide™ 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
vac
vdc
—
—
—
—
—
—
—
—
—
—
Verify that close-on-power-loss
and economizer control board
are functioning
properly.
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 D18. If diode is not functioning properly, replace D18.
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 D19. If diode is not functioning properly, replace D19.
1. After verifying that the wiring is correct, modulate the damper to the minimum position. Remove the calls for G.
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 of
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.
LEGEND
Common Power
Enthalpy Control
Indoor (Evaporator) Fan Contactor
Indoor (Evaporator) Fan On
Outdoor-Air Thermostat
Plug
Supply-Air Thermostat
Economizer Position Switch
Volts Alternating Current
Volts Direct Current
37
Table 25 — PARABLADE Economizer 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 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 +.
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
toward 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 toward 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 toward 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
toward 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 terminals 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
38
LEGEND FOR FIG. 47 — TYPICAL WIRING SCHEMATIC AND COMPONENT ARRANGEMENT
IMPORTANT: Refer to unit wiring label for actual unit wiring
information.
AHA
C
CAP
CC
CH
COMP
D
EC
ECON
EPS
—
—
—
—
—
—
—
—
—
—
EQUIP
ER
FPT
GND
HPS
HS
I
IDM
IFM
IGC
LPS
LS
MGV
MTR
OAT
OFM
P
PL
QT
R
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Adjustable Heat Anticipator
Contactor, Compressor
Capacitor
Cooling Compensator
Crankcase Heater
Compressor Motor
Diode
Enthalpy Control
Economizer
Emergency Power Supply
(Nine Volt Battery)
Equipment
Economizer Relay
Freeze Up Protection Thermostat
Ground
High-Pressure Switch
Hall-Effect Sensor
Ignitor
Induced-Draft Motor
Indoor (Evaporator) Fan Motor
Integrated Gas Unit Controller
Low-Pressure/Loss-of-Charge Switch
Limit Switch
Main Gas Valve
Motor
Outdoor-Air Thermostat
Outdoor (Condenser) Fan Motor
Plug
Plug Assembly
Quadruple Terminal
Relay
RS
SAT
SEN
SW1
SW2
SW3
SW4
TC
TH
TRAN
—
—
—
—
—
—
—
—
—
—
Rollout Switch
Supply Air Thermostat
Sensor
Switch Fully Open
Switch Fully Closed
Switch Min. Vent Position
Switch Max. Vent Position
Thermostat-Cooling
Thermostat-Heating
Transformer
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.
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 at .14 amp. For units with 2 stages of heating,
set stage two anticipator at .14 amp.
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 (ORN) and connect to
208-v tap (RED). Insulate end of 230-v tap.
39
Fig. 47 — Typical Wiring Diagram and Component Arrangement
40
Copyright 1995 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. 534-852
Printed in U.S.A.
Form 48TJ-9SI
Pg 42
8-95
Replaces: 48TJ-3SI
Tab 1a 6a
I. PRELIMINARY INFORMATION:
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 ALL SHIPPING HOLDDOWN BOLTS AND BRACKETS 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 FILTER IS CLEAN AND IN PLACE
M VERIFY THAT UNIT INSTALLATION IS LEVEL
M CHECK FAN WHEEL AND PROPELLER 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
INDOOR-FAN AMPS
L1
L2
L3
TEMPERATURES
OUTDOOR-AIR TEMPERATURE
DB
RETURN-AIR TEMPERATURE
DB
WB
COOLING SUPPLY AIR
GAS HEAT SUPPLY AIR
PRESSURES
GAS INLET PRESSURE
IN. WG
GAS MANIFOLD PRESSURE
IN. WG (HI FIRE)
REFRIGERANT SUCTION
PSIG
REFRIGERANT DISCHARGE
PSIG
M VERIFY REFRIGERANT CHARGE USING CHARGING TABLES
Copyright 1995 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. 534-852
Printed in U.S.A.
Form 48TJ-9SI
Pg CL-1
8-95
Replaces: 48TJ-3SI
Tab 1a 6a
CUT ALONG DOTTEDLINE
(Remove and Use in Job File)
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