Carrier 48TJD008-014, 48TJE008-014, 48TJF008-012 User Manual
Single-Package Rooftop Heating/Cooling Units
Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS ...................1
INSTALLATION .............................1-22
Step 1 — Provide Unit Support ...............1
• ROOF CURB
• SLAB MOUNT
Step 2 — Field Fabricate Ductwork ............2
Step 3 — Install External Trap for
Condensate Drain ..........................2
Step 4 — Rig and Place Unit ..................2
• POSITIONING
Step 5 — Install Flue Hood ...................8
Step 6 — Install Gas Piping ...................8
Step 7 — Make Electrical Connections ........8
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
• HEAT ANTICIPATOR SETTINGS
Step 8 — Adjust Factory-Installed Options ...11
• APOLLO CONTROL
• MANUAL OUTDOOR-AIR DAMPER
• OPTIONAL DURABLADE ECONOMIZER
• OPTIONAL PARABLADE ECONOMIZER
Step 9 — Adjust Evaporator-Fan Speed ......16
START-UP .................................23,24
SERVICE ..................................25-30
TROUBLESHOOTING ......................31-36
START-UP CHECKLIST .................... CL-1
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment
can be hazardous due to system pressure and electrical components. Only trainedand qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters. All
other operations should be performed by trained service personnel. When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached
to the unit, and other safety precautions that may apply.
Follow all safety codes. Wearsafety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire extinguishers available for all brazing operations.
48TJD008-014
48TJE008-014
48TJF008-012
Disconnect gas piping from unit when leak
testing at pressure greater than1⁄2psig. Pressures greater than1⁄2psig will cause gas
valve damage resulting in hazardous condition. If gas valve is subjected to pressure greater than1⁄2psig, it must be replaced
before use. When pressure testing fieldsupplied gas piping at pressures of1⁄2psig
or less, a unit connected to such piping must
be isolated by manually closing the gas
valve(s).
Before performing service or maintenance operations on
unit, turn offmain power switch to unit. Electrical shock
could cause personal injury.
INSTALLATION
Unit is shipped in the vertical discharge configuration. To
convert to horizontal configuration, remove screws from side
duct opening covers and remove covers. Using the same screws,
install covers on vertical duct openings with the insulationside down. Seals around duct openings must be tight. See
Fig. 1.
Step 1 — Provide Unit Support
ROOF CURB — Assemble and install accessory roof curb
in accordance with instructions shipped with curb. See
Fig. 2. Install insulation, cant strips, roofing felt, and counter
flashing as shown. Ductwork must be attached to curb. If
gas is to be routed through the curb, attach the accessory
thru-the-curb service connection plate to the roof curb in accordance with the accessory installation instructions. Connection plate must be installed before unit is set in roof curb.
IMPORTANT: The gasketing of the unit to the roof
curb is critical for a watertight seal. Install gasket supplied with the roof curb as shown in Fig. 2. Improperly applied gasket can also result in air leaks and poor
unit performance.
Curb should be level. Unit leveling tolerances are shown
in Fig. 3. This is necessary for unit drain to function properly. Refer to Accessory Roof Curb Installation Instructions
for additional information as required.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 1a 6a
PC 111 Catalog No. 564-934 Printed in U.S.A. Form 48TJ-13SI Pg 1 9-96 Replaces: 48TJ-10SI
SLAB MOUNT (Horizontal Units Only) — Provide a level
concrete slab that extends a minimum of 6 in. beyond unit
cabinet. Install a gravel apron in front of condenser coil air
inlet to prevent grass and foliage from obstructing airflow.
NOTE: Horizontal units may be installed on a roof curb if
required.
Step 2 — Field Fabricate Ductwork — Secure all
ducts to roof curb and building structure on vertical units.
Do not connect ductwork to unit. For horizontal applications, field-supplied flanges should be attached to horizontal
discharge openings and all ductwork secured to the flanges.
Insulate and weatherproof all external ductwork, joints, and
roof openings with counter flashing and mastic in accordance with applicable codes.
Ducts passing through an unconditioned space must be
insulated and covered with a vapor barrier.
If a plenum return is used on a vertical unit, the return
should be ducted through the roof deck to comply with applicable fire codes.
A minimum clearance is not required around ductwork.
Cabinet return-air static shall not exceed −.35 in. wg with
Durablade or PARABLADE economizer or .45 in. wg without economizer.
These units are designed for a minimum continuous returnair temperature of 50 F (dry bulb), or an intermittent operation down to 45 F (dry bulb), such as when used with a night
set-back thermostat.
Step 3 — Install External Trap for Condensate
Drain —
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
The unit’s3⁄4-in. condensate drain connections
bottom connection to the side connection. See Fig. 4. The
piping for the condensate drain and external trap can be completed after the unit is in place.
All units must have an external trap for condensate drainage. Install a trap at least 4-in. deep and protect against freezeup. See Fig. 5. If drain line is installed downstream from the
external trap, pitch the line away from the unit at 1 in. per
10 ft of run. Do not use a pipe size smaller than the unit
connection.
Step4 — Rig and Place Unit — Inspect unit for trans-
portation damage. File any claim with transportation agency.
Keep unit upright and do not drop. Spreader bars are not
required if top crating is left on unit. Rollers may be used to
move unit across a roof. Level by using unit frame as a reference. See Table 1 and Fig. 6 for additional information.
Operating weight is shown in Table 1 and Fig. 6.
Lifting holes are provided in base rails as shown in
Fig. 6 and 7. Refer to rigging instructions on unit.
All panels must be in place when rigging.
POSITIONING — Maintain clearance around and above unit
to provide minimum distance from combustible materials,
proper airflow, and service access. See Fig. 7.
Do not install unit in an indoor location. Do not locate
unit air inlets near exhaust vents or other sources of contaminated air.
Be sure that unit is installed so that snow will not block
the combustion intake or flue outlet.
Unit may be installed directly on wood flooring or on Class
A, B, or C roof-covering material when roof curb is used.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
Position unit on roof curb so that the following clearances
are maintained:
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.)
1
⁄4-in. clearance between roof curb and base
Fig. 1 — Horizontal Conversion Panels
2
UNIT SIZE
48TJ
008-014 28-8
‘‘B’’ ‘‘C’’ ‘‘D’’ALT DRAIN HOLE
7
⁄169 [827] 18-1015⁄169 [583] 13⁄49 [45]
‘‘E’’
GAS
3
⁄49 NPT3⁄49 NPT
3
⁄49 NPT 11⁄49 NPT
POWER
CONNECTION
CONTROL
CONNECTION
1
⁄29 NPT
1
⁄29 NPT
CONNECTOR
ACCESSORY
PACKAGE
CRBTMPWR00A100
(THRU-THE-BOTTOM)
CRBTMPWR00A200
(THRU-THE-BOTTOM)
UNIT SIZE
48TJ ACCESSORY
008-014
NOTES:
1. Roof curb accessory is shipped unassembled.
2. Insulated panels.
3. Dimensions in [ ] are in millimeters.
4. Roof curb: galvanized steel.
5. Attach ductwork to curb (flanges of duct rest on
curb).
6. Service clearance 4 ft on each side.
‘‘A’’
18-29 [356] CRRFCURB003A00
28-09 [610] CRRFCURB004A00
ROOF CURB
7. Direction of airflow.
8. Either accessory connector package can be used
with either roof curb.
Fig. 2 — Roof Curb Details
3
MAXIMUM ALLOWABLE
DIFFERENCE (in.)
A-B B-C A-C
0.5 1.0 1.0
Fig. 3 — Unit Leveling Tolerances
NOTE: Drain plug is shown in factory-installed position.
Fig. 4 — Condensate Drain Pan
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4-in. trap is recommended.
Fig. 5 — External Trap Condensate Drain
Locate mechanical draft system flue assembly at least
48 in. from any opening through which combustion products could enter the building, and at least 48 in. from an adjacent building or combustible material. When unit is located
adjacent to public walkways, flue assembly must be at least
7 ft above grade.
Flue vent discharge must have a minimum horizontal clearance of 48 in. from electric and gas meters, gas regulators,
and gas relief equipment.
Flue gas can deteriorate building materials. Orient unit so
that flue gas will not affect building materials.
Adequate combustion-air space must be provided for proper
operation of this equipment. Be sure that installation complies with all local codes and Section 5.3, Air for Combustion and Ventilation,NFGC (National Fuel Gas Code), ANSI
(American National Standards Institute) Z223.1-latest year
and addendum Z223.1A-latest year. In Canada, installation
must be in accordance with the CAN1. B149.1 and
CAN1.B149.2 installation codes for gas burning appliances.
NOTES:
1. Dimension in ( ) is in millimeters.
2. Hook rigging shackles through holes in base rail as shown in detail ‘‘A.’’
Holesinbase rails arecentered around theunit center ofgravity. Usewooden
top skid when rigging to prevent rigging straps from damaging unit.
3. Weights include base unit without economizer. See Table1 for economizer
weights.
All panels must be in place when rigging.
Fig. 6 — Rigging Details
MAX
UNIT
48TJD/TJE/TJF008 870 395 87.38 2219 40.25 1022 41.31 1050
48TJD/TJE/TJF009 880 399 87.38 2219 40.25 1022 41.31 1050
48TJD/TJE/TJF012 1035 469 87.38 2219 40.25 1022 49.31 1253
48TJD/TJE014 1050 476 87.38 2219 40.25 1022 49.31 1253
WEIGHT
lb kg in. mm in. mm in. mm
‘‘A’’ ‘‘B’’ ‘‘C’’
DIMENSIONS
4
Table 1 — Physical Data
UNIT SIZE 48TJ 008D/E/F 009D/E/F 012D/E/F 014D/E
NOMINAL CAPACITY (tons) 7
OPERATING WEIGHT (lb)
Unit
Al/Al* 870 880 1035 1050
Al/Cu* 881 896 1057 1077
Cu/Cu* 893 907 1080 1100
Durablade Economizer 44 44 44 44
PARBLADE Economizer 62 62 62 62
Roof Curb 143 143 143 143
COMPRESSOR Reciprocating Scroll
Quantity 2222
Oil (oz) 50 ea 50 ea 50 ea 54 ea
REFRIGERANT TYPE R-22
Operating Charge (lb-oz)
Circuit 1 4-13 6-14 5-13 8-10
Circuit 2 4-14 6-3 5-14 8- 6
CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced Fins
Rows...Fins/in. 1...17 2...17 2...17 2...17
Total Face Area (sq ft) 20.50 18.00 17.42 25.00
CONDENSER FAN Propeller Type
Nominal Cfm 6500 6500 7000 7000
Quantity...Diameter (in.) 2...22 2...22 2...22 2...22
Motor Hp...Rpm
Watts Input (Total) 600 600 600 600
EVAPORATOR COIL Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol™ Feed Device
Rows...Fins/in. 3...15 3...15 3...15 4...15
Total Face Area (sq ft) 8.0 8.0 10.0 11.1
EVAPORATOR FAN Centrifugal Type
Quantity...Size (in.) Std 1...15 x 15 1...15 x 15 1...15 x 15 1...15 x 15
Type Drive Std Belt Belt Belt Belt
Nominal Cfm 3000 3400 4000 5000
Motor Hp Std ————
Maximum Continuous Bhp Std 2.40 2.40 2.40 4.20
Motor Frame Size Std 56 56 56 56
Nominal Rpm High/Low ————
Fan Rpm Range Std 590-840 685-935 685-935 860-1080
Motor Bearing Type Ball Ball Ball Ball
Maximum Allowable Rpm 2100 2100 2100 2100
Motor Pulley Pitch Diameter Min/Max (in.) Std 2.4/3.4 2.8/3.8 2.8/3.8 4.0/5.0
Nominal Motor Shaft Diameter (in.) Std
Fan Pulley Pitch Diameter (in.) Std 7.0 7.0 7.0 8.0
Nominal Fan Shaft Diameter (in.) ————
Belt, Quantity...Type...Length (in.) Std 1...A...48 1...A...48 1...A...51 1...A...51
Pulley Center Line Distance (in.) Std 16.75-19.25 16.75-19.25 15.85-17.50 15.85-17.50
Speed Change per Full Turn of Std 50 50 50 44
Movable Pulley Flange (rpm) Alt 50—5050
Movable Pulley Maximum Full Turns Std 5555
From Closed Position Alt 5—56
Factory Setting Std 5555
Factory Speed Setting (rpm) Std 590 685 685 860
Fan Shaft Diameter at Pulley (in.) 1111
Alt 1...15 x 15 — 1...15 x 15 1...15 x 15
Alt Belt — Belt Belt
Alt ————
Alt — — 2.90 5.25
Alt — — 56 56
Alt 685-935 — 835-1085 900-1260
Alt 2.8/3.8 — 3.4/4.4 3.1/4.1
Alt ——
Alt 7.0 — 7.0 5.9
Alt 1...A...51 — 1...A...57 1...BX...46
Alt 16.75-19.25 — 15.85-17.50 15.85-17.50
Alt 5—56
Alt 685 — 835 960
1
1
⁄4...1100
5
⁄
8
⁄
2
81⁄
1
⁄4...1100
5
⁄
8
2
10 121⁄
1
⁄4...1100
5
⁄
8
7
⁄
8
2
1
⁄4...1100
7
⁄
8
7
⁄
8
(See legend and notes on page 6.)
5
Table 1 — Physical Data (cont)
UNIT SIZE 48TJ 008D/E/F 009D/E/F 012D/E/F 014D/E
FURNACE SECTION
Rollout Switch Cutout
Temp (F) 195 195 195 195
Burner Orifice Diameter
(in. ...drill size)
Natural Gas Std .120...31 .120...31 .120...31/.120...31/.129...30 .120...31/.129...30
Liquid Propane Alt .096...41 .096...41 .096...41/.096...41/.102...38 .096...41/.102...38
Pilot Orifice Diameter
(Quantity) in. ...drill size
Natural Gas Std —— ——
Liquid Propane Alt —— ——
Thermostat Heat Anticipator
Setting (amps)
208/230 v Stage 1 .14 .14 .14 .14
460 v Stage 1 .14 .14 .14 .14
Gas Input (Btuh) Stage 1 125,000/120,000/180,000 125,000/120,000/180,000 120,000/180,000/200,000 180,000/200,000
Efficiency (Steady
State) (%) 80 80 80 80
Temperature Rise Range 20-50/35-65/45-75 20-50/35-65/45-75 35-65/35-65/40-70 35-65/40-70
Manifold Pressure (in. wg)
Natural Gas Std 3.5 3.5 3.5 3.5
Liquid Propane Alt 3.5 3.5 3.5 3.5
Gas Valve Quantity 11 11
Field Gas Connection
Size (in.)
HIGH-PRESSURE SWITCH (psig)†
Standard Compressor
Internal Relief (Differential)
Cutout 428 428
Reset (Auto.) 320 320
LOW-PRESSURE SWITCH (psig)†
Cutout 7±3
Reset (Auto.) 22±7
FREEZE PROTECTION
THERMOSTAT (F)†
Opens 30±5
Closes 45±5
OUTDOOR-AIR INLET SCREENS Cleanable
Quantity...Size (in.) 1...20 x 25 x 1
RETURN-AIR FILTERS Throwaway
Quantity...Size (in.) 4...16 x 20 x 2 4...16 x 20 x 2 4...20 x 20 x 2 4...20 x 20 x 2
Al — Aluminum
Bhp — Brake Horsepower
Cu — Copper
Stage 2 .20 .20 .20 .20
Stage 2 .20 .20 .20 .20
Stage 2 —/180,000/224,000 —/180,000/224,000 180,000/224,000/250,000 224,000/250,000
1
⁄2/3⁄4/3⁄
4
1
⁄2/3⁄4/3⁄
4
3
⁄4/3⁄4/3⁄
4
450±50 500±50
1...16 x 25 x 1
LEGEND
*Evaporator coil fin material/condenser coil fin material.
†Requires an optional or accessory controls kit.
NOTE: The 48TJ008-014 units have a loss-of-charge/low-pressure
switch (accessory) located in the liquid line.
3
⁄4/3⁄
4
6
STANDARD
UNIT
WEIGHT
48TJ
Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg ft-in. mm ft-in. mm ft-in. mm ft-in. mm
UNIT
CORNER
WEIGHT
(A)
CORNER
WEIGHT
(B)
CORNER
WEIGHT
(C)
CORNER
WEIGHT
(D)
D/E/F008 870 395 189 86 161 73 239 109 280 127 1-2
D/E/F009 880 399 191 87 163 74 242 110 284 129 3-3
D/E/F012 1035 469 225 102 192 87 285 129 333 151 2-5
D/E014 1050 476 228 103 195 88 289 131 338 153 1-2
‘‘H’’ ‘‘J’’ ‘‘K’’ ‘‘L’’
7
⁄8378 3-55⁄161050 2-911⁄16856 2- 27⁄16672
7
⁄81013 3-55⁄161050 2-911⁄16856 2- 27⁄16672
7
⁄8759 4-15⁄161253 3-03⁄8924 2-107⁄16875
7
⁄8378 4-15⁄161253 3-03⁄8924 2-107⁄16875
NOTES:
1. Dimensions in [ ] are in millimeters.
2. Center of gravity.
3. Direction of airflow.
4. On vertical discharge units, ductwork to be attached to accessory roof curb only.For
horizontal discharge units field-supplied flanges shouldbe attachedto horizontaldischarge openings, and all ductwork should be attached to the flanges.
5. Minimum clearance (local codes or jurisdiction may prevail):
a. Between unit (flue side) and combustible surfaces, 48 inches.
b. Bottom of unit to combustible surfaces (when not using curb) 1 inch.
Bottom of base rail to combustible surfaces (when not using curb) 0 inches.
c. Condenser coil, for proper airflow, 36 in. one side, 12 in. the other. The side get-
ting the greater clearance is optional.
d. Overhead, 60 in. to assure proper condenser fan operation.
e. Between units, control box side, 42 in. per NEC (National Electrical Code).
f. Between unit and ungrounded surfaces, control box side, 36 in. per NEC.
g. Between unit and block or concrete walls and other grounded surfaces, control
box side, 42 in. per NEC.
h. Horizontal supply and return end, 0 inches.
6. With the exception of the clearance for the condenser coil and combustion side as
stated in Notes 5a, b, and c, a removable fence or barricade requires no clearance.
7. Units may be installed on combustible floors made from wood or Class A, B, or C
roof covering material if set on base rail.
8. The vertical center of gravity is 18-79 [483] up from the bottom of the base rail. Horizontal center of gravity is shown.
CONNECTION SIZES
3
⁄89 Dia [35] Field Power Supply Hole
A 1
1
⁄29 Dia [64] Power Supply Knock-Out
B 2-
3
⁄49 Dia [44] Charging Port Hole
C 1
7
⁄89 Dia [22] Field Control Wiring Hole
D
3
⁄49—14 NPT Condensate Drain
E
1
⁄29—14 NPT Gas Connection 48TJD008 & 009
3
⁄49—14 NPT Gas Connection 48TJE/F008 & 009;
F
48TJD/E012,014, 48TJF012
G 29 Dia [51] Power Supply Knock-Out
BOTTOM POWER CHART, THESE HOLES
REQUIRED FOR USE WITH ACCESSORY
PACKAGES — CRBTMPWR001A00,
OR CRBTMPWR002A00
THREADED
CONDUIT SIZE
1
⁄2( 24 V
3
⁄4( Power* 11⁄89 [28.4]
11⁄4( Power* 13⁄49 [44.4]
*Select either
WIRE SIZE
3
⁄49 or 11⁄49 for power, depending on wire size.
REQUIRED HOLE
SIZES (MAX)
7
⁄89 [22.2]
Fig. 7 — Base Unit Dimensions
7
Step 5 — Install Flue Hood — Flue hood is shipped
screwed to the burner compartment access panel. Remove
from shipping location and, using screws provided, install
flue hood and screen in location shown in Fig. 8.
Step 6 — Install Gas Piping — Unit is equipped for
use with type of gas shown on nameplate. Refer to local building codes, or in the absence of local codes, to ANSI Z223.1latest year and addendum Z223.1A-latest year entitled
National Fuel Gas Code. In Canada, installation must be in
accordance with the CAN1.B149.1 and CAN1.B149.2 installation codes for gas burning appliances.
For natural gas applications, gas pressure at unit gas connection must not be less than 4.0 in. wg (5.0 in. wg in high
heat units) or greater than 13.0 in. wg while unit is operating. For liquid propane applications, the gas pressure must
not be less than 5.0 in. wg or greater than 13.0 in. wg at the
unit connection.
Size gas supply piping for 0.5 in. wg maximum pressure drop. Do not use supply pipe smaller than unit gas
connection.
Support gas piping as shown in the table in Fig. 9. For
example, a
3
⁄4-in. gas pipe must have one field-fabricated support beam every 8 ft. Therefore, an 18-ft long gas pipe would
have a minimum of 2 support beams, and a 48-ft long pipe
would have a minimum of 6 support beams.
See Fig. 9 for typical pipe guide and locations of external
manual gas shutoff valve.
Step 7 — Make Electrical Connections
Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may
consist of electrical wire connected to unit ground lug
in control compartment, or conduit approved for electrical ground when installed in accordance with NEC
(National Electrical Code), ANSI/NFPA (National Fire
Protection Association), latest edition, and local electrical codes. Do not use gas piping as an electrical ground.
Failure to follow this warning could result in the installer being liable for personal injury of others.
Fig. 8 — Flue Hood Details
LEGEND
NFGC — National Fuel Gas Code
*Field supplied.
NOTE: Follow all local codes.
SPACING OF SUPPORTS
STEEL PIPE
NOMINAL
DIAMETER
(in.)
1
⁄
2
3
⁄4or 1 8
1
⁄4or larger 10
1
X
DIMENSION
(feet)
6
Fig. 9 — Gas Piping Guide (With Accessory
Thru-the-Curb Service Connections)
FIELD POWER SUPPLY— All units except 208/230-v units
are factory wired for the voltage shown on the nameplate. If
the 208/230-v unit is to be connected to a 208-v power supply, the transformer must be rewired by moving the black
wire from the 230-v red wire on the transformer and connecting it to the 200-v blue wire from the transformer. The
red wire then must be insulated.
Refer to unit label diagram for additional information. Pig-
tails are provided for field service.
When installing units, provide a disconnect per NEC. Use
copper conductors only when splice connectors are used.
All field wiring must comply with NEC and local requirements. In Canada, electrical connections must be in accordance with CSA (Canadian Standards Association) C22.1
Canadian Electrical Code Part One.
Install conduit through side panel openings indicated in
Fig. 7. Route power lines through connector to terminal connections as shown in Fig. 10.
On 3-phase units, voltages between phases must be balanced within 2% and the current within 10%. Use the formula shown in Table 2, Note 2 to determine the percentage
of voltage imbalance. Operation on improper line voltage or
excessive phase imbalance constitutes abuse and may cause
damage to electrical components. Such operation would invalidate any applicable Carrier warranty.
NOTE: If field-installed thru-the-bottom connections are used,
refer to the accessory installation instructions for power wiring. Refer to Fig. 7 for drilling holes in basepan.
FIELD CONTROL WIRING — Install a Carrier-approved
accessory thermostat assembly according to installation instructions included with the accessory. Locate thermostat assembly on a solid wall in the conditioned space to sense average temperature in accordance with thermostat installation
instructions.
NOTE: For wire runs up to 50 ft, use no. 18 AWG (American Wire Gage) insulated wire (35 C minimum). For 50 to
75 ft, use no. 16 AWG insulated wire (35 C minimum). For
over 75 ft, use no. 14 AWGinsulated 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.
8
Route thermostat cable or equivalent single leads of colored wire from subbase terminals to low-voltage connections on unit (shown in Fig. 11) as described in Steps1-4
below.
1. If unit is mounted on roof curb and accessory thru-the-
curb service plate connection is used, route wire through
connection plate.
2. Pass control wires through the hole provided on unit
(see connection D in Connection Sizes table in Fig. 7).
3. Feed wires through the raceway built into the corner post
to the 24-v barrier located on the left side of the control
Table 2 — Electrical Data
box. See Fig. 12. The raceway provides the UL-required
(Underwriters’Laboratories) clearance between high- and
low-voltage wiring.
4. Connect thermostat wires to screw terminals on lowvoltage connection board.
HEAT ANTICIPATOR SETTINGS — Set heat anticipator
settings at .14 amp for the first stage and .20 amp for secondstage heating.
UNIT
48TJ
008
1
(7
⁄2Tons)
009
1
(8
⁄2Tons)
012
(10 Tons)
014
1
(12
⁄2Tons)
NOMINAL
VOLTAGE
(60 Hz)
208/230
(3 phase)
460
(3 phase)
575
(3 phase)
208/230
(3 phase)
460
(3 phase)
575
(3 phase)
208/230
(3 phase)
460
(3 phase)
575
(3 phase)
208/230
(3 phase)
460
(3 phase)
575
(3 phase)
VOLTAGE
IFM
TYPE
RANGE
Min Max RLA LRA Hp FLA FLA FLA MCA MOCP† FLA LRA
Std 187 254 13.6 73.4
Std 414 508 6.2 37.7
Std 518 632 4.9 31.0
Std 187 254 15.8 92.0
Std 414 508 7.4 46.0
Std 518 632 5.9 44.0
Std
187 254 17.9 110.0
Alt 7.5 50.6/50.6 60/60 53/53 286/286
Std
414 508 8.6 55.0
Alt 3.4 24.2 30 25 173
Std
518 632 6.4 44.0
Alt 3.4 18.2 20 19 139
Std
187 254 23.0 146.0
Alt 15.0 69.6/69.6 80/80 73/73 406/406
Std
414 508 10.4 73.0
Alt 7.4 32.2 35 34 203
Std
518 632 8.3 58.4
Alt 7.4 25.7 35 27 163
COMPR
(ea)
LEGEND
FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM — Indoor (Evaporator) Fan Motor
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC — National Electrical Code
OFM — Outdoor (Condenser) Fan Motor
RLA — Rated Load Amps
UL — Underwriters’ Laboratories
*Used to determine minimum disconnect size per NEC.
†Fuse or HACR circuit breaker.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the
overcurrent protective device for the unit shall be fuse or HACR
breaker. Canadian units may be fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is greater than 2%.
the percent voltage imbalance.
Use the following formula to determine
% Voltage Imbalance
= 100 x
max voltage deviation from average voltage
average voltage
OFM
(ea)
1
⁄41.4 5.8 .57 39.2/39.2 45/45 41/41 194/194
1
⁄40.8 2.6 .30 18.0 25 19 99
1
⁄40.8 2.6 .30 14.2 20 15 81
1
⁄41.4 5.8 .57 44.2/44.2 50/50 46/46 231/231
1
⁄40.8 2.6 .30 20.7 25 22 116
1
⁄40.8 2.6 .30 16.5 20 17 107
1
⁄41.4
1
⁄40.8
1
⁄40.8
1
⁄41.4
1
⁄40.8
1
⁄40.8
IFM
5.8
2.6
2.6
10.6
4.8
4.8
COMBUSTION
FAN MOTOR
.57
.30
.30
.57
.30
.30
POWER SUPPLY
DISCONNECT
SIZE*
48.9/48.9 60/60 51/51 267/267
23.4 30 24 134
17.6 20 18 107
65.2/65.2 80/80 68/68 383/383
29.6 35 31 192
23.6 30 25 154
EXAMPLE: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =
452 + 464 + 455
3
1371
=
3
= 457
NOTE: The 575-v 48TJ008-014 units are UL, Canada, only.
Determine maximum deviation from average voltage.
(AB) 457 - 452=5v
(BC) 464 - 457=7v
(AC) 457 - 455=2v
Maximum deviation is 7 v.
Determine percent voltage imbalance.
% Voltage Imbalance = 100 x
7
457
= 1.53%
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is
more than 2%, contact your local electric utility company
immediately.
9
Fig. 10 — Power Wiring Connections
LEGEND
C—Contactor
COMPS — Compressors
IFC — Indoor (Evaporator) Fan
NEC — National Electrical Code
TB — Terminal Block
Contactor
Terminal Block Connection
Splice Connection
(Factory Supplied)
Field Wiring
Factory Wiring
LEGEND
AHA — Adjustable Heat Anticipator
CC — Cooling Compensator
TC — Thermostat-Cooling
TH — Thermostat-Heating
Field Wiring
Factory Wiring
Fig. 11 — Low-Voltage Connections
UNIT
CONNECTION
BOARD
RACEWAY
INTEGRATED
GAS UNIT
CONTROLLER
(IGC)
Fig. 12 — Field Control Wiring Raceway
10
Step 8 — Adjust Factory-Installed Options
APOLLO CONTROL — The optionalApollo control is used
to actively monitor all modes of operation as well as indoor
(evaporator) fan status, filter status, and indoor-air quality.
The Apollo control is designed to work with Carrier TEMP
and VVTt systems.
The thermostat must be wired to the Apollo control before
starting the unit. Refer to the Apollo control installation instructions for information on installing the thermostat. See
Fig. 13 for Apollo location.
MANUAL OUTDOOR-AIR DAMPER — The outdoor-air
hood and screen are attached to the basepan at the bottom of
the unit for shipping.
Assembly:
1. Determine quantity of ventilation required for building.
Record amount for use in Step 8.
2. Remove filter access panel by raising panel and swinging panel outward. Panel is now disengaged from track
and can be removed. No tools are required to remove
the filter access panel. Remove outdoor-air opening panel.
Save panels and screws. See Fig. 14.
3. Separate hood and screen from basepan by removing the
screws and brackets securing them. Save all screws and
discard brackets.
4. Replace outdoor air opening panel with screws saved
from Step 2.
5. Place hood on front of outdoor-air opening panel. See
Fig. 15 for hood details. Secure top of hood with the
6 screws removed in Step 3. See Fig. 16.
6. Remove and save 8 screws (4 on each side) from sides
of the manual outdoor-air damper.
7. Align screw holes on hood with screw holes on side of
manual outdoor-air damper. See Fig. 15 and 16. Secure
hood with 8 screws from Step 6.
8. Adjust minimum position setting of the damper blade
by adjusting the manual outdoor-air adjustment screws
on the front of the damper blade. See Fig. 14. Slide blade
vertically until it is in the appropriate position determined by Fig. 17. Tighten screws.
OUTDOOR
AIR OPENING
PANEL
Fig. 14 — Damper Panel with Manual
Outdoor-Air Damper Installed
WIRING TO
THERMOST AT
APOLLO
CONTROL
CONTROL
WIRING
Fig. 13 — Apollo Control Factory-Installed
in Typical Unit
Fig. 15 — Outdoor-Air Hood Details
HOOD
NOT
SHOWN)
Fig. 16 — Damper with Hood Attached
11
Fig. 17 — Position Setting
9. Remove and save screws currently on sides of hood.
Insert screens. Secure screens to hood using the screws.
See Fig. 16.
10. Replace filter access panel. Ensure filter access panel
slides along the tracks and is securely engaged.
OPTIONAL DURABLADE ECONOMIZER — The optional economizer hood assembly is packaged and shipped
in the filter section. Damper blades and control boards are
installed at the factory and the economizer is shipped in the
vertical discharge position.
NOTE: Horizontal discharge block-off plate is shipped with
the air hood package. If unit is to be used for vertical discharge application, discard this plate.
Assembly
1. Determine if ventilation air is required in building. If
so, determine the minimum amount to be supplied by
each unit and record quantity of ventilation air needed
for use in Step 8.
2. Remove filter access panel by raising panel and swinging panel outward. Panel is now disengaged from track
and can be removed. No tools are required to remove
filter access panel. Remove outdoor-air opening panel.
Save panels and screws. See Fig. 18. Remove optional
economizer and outdoor-air damper hood package from
filter section.
3. Assemble outdoor-air hood top and side plates as shown
in Fig. 19. Install seal strips on hood top and sides. Put
aside screen retainer and retainer screw for later assembly. Do not attach hood to unit at this time.
4. On 012 and 014 units, install vertical discharge blockoff plate over duct openings. See Fig. 20.
5. Slide economizer into unit and secure with screws. See
Fig. 21.
NOTE: Be sure to engage rear economizer flange under
tabs in vertical return-air opening.
6. To convert to horizontal discharge application:
a. Rotate the economizer 90 degrees until the econo-
mizer motor faces the condenser section (see
Fig. 22).
b. Rotate the barometric relief damper hinge
90 degrees. Barometric relief damper should open vertically to operate properly.
c. Install horizontal discharge block-off plate over the
opening on the access panel. (Block-off plate MUST
be installed before installing hood assembly.) See
Fig. 23.
7. Insert economizer plug into economizer harness. Remove tape from barometric relief damper. See Fig. 21.
8. If ventilation air is not required, proceed to Step 9. If
ventilation air is required, determine the minimum position setting for required airflow. See Fig. 24. Adjust
minimum position setting by adjusting the screws on the
position setting bracket. See Fig. 25. Slide bracket until
the top screw is in the position determined by
Fig. 24. Tighten screws.
9. Remove tape from outdoor-air thermostat (OAT). Fasten OAT to inside of hood using screws and speed clips
provided. See Fig. 26. Make sure OAT terminals are positioned up.
10. 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.
11. Fasten hood top and side plate assembly to outdoor-air
opening panel with screws provided.
12. Place knob supplied with economizer on OAT. See
Fig. 26. Set for 3° F below indoor room thermostat setting. If accessory enthalpy control (EC) is used in place
of OAT, see instructions shipped with EC for installation and adjustment. See Fig. 26.
13. Connect OAT per Fig. 27.
14. Slide outdoor-air inlet screens into screen track on hood
side plate. While holding screens in place, fasten screen
retainer to hood using screws provided.
NOTE: Refer to Fig. 28 for Durablade economizer barometric relief damper characteristics.
12
OUTDOOR-AIR
OPENING PANEL
Fig. 18 — Access Panel Locations
FILTER ACCESS
PANEL
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