Carrier 50TJ016 Installation, Start-Up And Service Instructions Manual
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Carrier 50TJ016 Installation, Start-Up And Service Instructions Manual

Carrier 50TJ016 Installation, Start-Up And Service Instructions Manual

Single-package rooftop units electric cooling with electric heat option
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CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Step 1 - Provide Unit Support . . . . . . . . . . . . . . 1
• ROOF CURB
Step 2 - Rig and Place Unit . . . . . . . . . . . . . . . . . 1
• POSITIONING
• ROOF MOUNT
Step 3 - Field Fabricate Ductwork . . . . . . . . . . . 7
Step 5 - Trap Condensate Drain . . . . . . . . . . . . 7
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Step 8 - Install Outdoor-Air Hood . . . . . . . . . . . 12
Step 9 - Install All Accessories . . . . . . . . . . . . . 12
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-20
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-27
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 28
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . CL-1

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment
can be hazardous due to system pressure and electrical com-
ponents. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance func-
tions of cleaning coils and filters and replacing filters. All
other operations should be performed by trained service
personnel. When working on air-conditioning equipment, ob-
serve precautions in the literature, tags and labels attached
to the unit, and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire ex-
tinguishers available for all brazing operations.
Before performing service or maintenance operations on
unit, turn off main power switch to unit. Electrical shock
could cause personal injury.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1
PC 111
Catalog No. 565-135
Tab
1b
Electric Cooling with Electric Heat Option
Installation, Start-Up and
Service Instructions
Page
Printed in U.S.A.
Single-Package Rooftop Units
IMPORTANT: Units have high ambient operating lim-
its. If limits are exceeded, the unit will automatically
lock the compressor out of operation. Manual reset will
be required to restart the compressor.
INSTALLATION

Step 1 - Provide Unit Support

ROOF CURB - Assemble and install accessory roof curb
or horizontal adapter roof curb in accordance with instruc-
tions shipped with the curb or horizontal adapter. Accessory
roof curb and horizontal adapter roof curb and information
required to field fabricate a roof curb or horizontal adapter
roof curb are shown in Fig. 1 and 2. Install insulation, cant
strips, roofing, and counter flashing as shown. Ductwork can
be secured to roof curb before unit is set in place.
IMPORTANT: The gasketing of the unit to the roof
curb or adapter roof curb is critical for a leak-proof
seal. Install gasket supplied with the roof curb or adapter
roof curb as shown in Fig. 1. Improperly applied gas-
ket can result in air leaks and poor unit performance.
Curb or adapter roof curb should be level. This is neces-
sary to permit unit drain to function properly. Unit leveling
tolerance is
⁄
in. per linear ft in any direction. Refer to
1
16
Accessory Roof Curb or Horizontal Adapter Roof Curb In-
stallation Instructions for additional information as required.
ALTERNATE UNIT SUPPORT - When the curb or adapter
cannot be used, support unit with sleepers using unit curb or
adapter support area. If sleepers cannot be used, support long
sides of unit with a minimum of 3 equally spaced 4-in. x
4-in. pads on each side.
Step 2 - Rig and Place Unit -
portation damage. File any claim with transportation agency.
Keep unit upright, and do not drop. Use spreader bars over
unit to prevent sling or cable damage. Rollers may be used
to move unit across a roof. Level by using unit frame as a
reference; leveling tolerance is
direction. See Fig. 3 for additional information. Unit weight
is shown in Table 1.
Four lifting holes are provided in ends of unit base rails
as shown in Fig. 3. Refer to rigging instructions on unit.
POSITIONING - Provide clearance around and above unit
for airflow, safety, and service access (Fig. 4 and 5).
Do not install unit in an indoor location. Do not locate air
inlets near exhaust vents or other sources of contam-
inated air.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
ROOF MOUNT - Check building codes for weight distri-
bution requirements.
Form 50TJ-14SI
Pg 1
50TJ016-028
Inspect unit for trans-
1
⁄
in. per linear ft in any
16
10-98
Replaces: 50TJ-13SI

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  • Page 1: Table Of Contents

    50TJ016-028 Single-Package Rooftop Units Electric Cooling with Electric Heat Option Installation, Start-Up and Service Instructions CONTENTS IMPORTANT: Units have high ambient operating lim- its. If limits are exceeded, the unit will automatically Page lock the compressor out of operation. Manual reset will SAFETY CONSIDERATIONS .

  • Page 2: Installation

    NOTES: PKG. CURB 1. Roof curb accessory is shipped disassembled. DESCRIPTION NO. REF. HEIGHT 2. Insulated panels: ⁄ thick neoprene coated 2 lb density. 1 -2 Standard Curb 3. Dimensions in ( ) are in millimeters. 50PQ900221 (305) 14 High Direction of airflow.
  • Page 3 DIMENSIONS MAXIMUM UNIT SHIPPING WEIGHT 50TJ ft-in. ft-in. 1550 6-11 ⁄ 2121 4- 0 1219 1650 6-11 ⁄ 2121 3-10 1168 NOTE: For preassembled horizontal adapter roof curb part no. 50DP900211, the accessory kit includes a factory-designed, high- 1700 6-11 ⁄...
  • Page 4 POWER EXHAUST/BAROMETRIC RELIEF 8. Dimensions are from outside of corner post. Allow 0 - ⁄ (8) on each side for top (ACCESSORY ONLY) cover drip edge. 9. See drawing 50TJ500352 for service option details. Fig. 4 — Base Unit Dimensions, 50TJ016,020...
  • Page 5 STD UNIT ECONOMIZER CORNER CORNER CORNER CORNER DIM A DIM B DIM C WEIGHT WEIGHT UNIT ft-in. ft-in. ft-in. mm 50TJ024 1700 771 1016 1041 50TJ028 1850 839 1092 NOTES: 1. Refer to print for roof curb accessory dimensions. 2. Dimensions in ( ) are in millimeters. Center of Gravity.
  • Page 6 Circuit 2 uses the upper portion of both coils. †The 50TJ028 unit requires 2-in. industrial-grade filters capable of handling face velocities up to 625 ft/min (such as American Air Filter no. 5700 or equivalent). NOTE: The 50TJ016-028 units have a low-pressure switch (standard) located on the suction side.

  • Page 7: Step 3 - Field Fabricate Ductwork

    3/4" FPT DRAIN 1-3/8" CONNECTION DRAIN HOLES Fig. 9 — Condensate Drain Details (50TJ016,020 Shown) NOTE: Do not drill in this area, as damage to basepan may result in water leak. Fig. 7 — Concentric Duct Air Distribution (50TJ020-028 Shown)

  • Page 8: Step 6 - Make Electrical Connections

    Unit failure as a result of operation on improper line volt- age or excessive phase imbalance constitutes abuse and may cause damage to electrical components. FIELD CONTROL WIRING — Install a Carrier-approved accessory thermostat assembly according to the installation instructions included with the accessory. Locate thermostat assembly on a solid wall in the conditioned space to sense average temperature.
  • Page 9 Table 2 — Electrical Data NOMINAL COMPRESSOR VOLTAGE POWER ELECTRIC POWER UNIT VOLTAGE RANGE EXHAUST HEAT* SUPPLY No. 1 No. 2 50TJ (3 Ph, 60 Hz) Min Max RLA LRA RLA LRA Qty Hp FLA (ea) Hp FLA LRA MOCP* —...
  • Page 10 Table 2 — Electrical Data (cont) NOMINAL COMPRESSOR VOLTAGE POWER ELECTRIC POWER UNIT VOLTAGE RANGE EXHAUST HEAT* SUPPLY No. 1 No. 2 50TJ (3 Ph, 60 Hz) Min Max RLA LRA RLA LRA Qty Hp FLA (ea) FLA LRA MOCP† —...

  • Page 11: Step 7 - Make Outdoor-Air Inlet

    Table 3 — Heat Anticipator Settings Step 7 — Make Outdoor-Air Inlet Adjustments UNIT UNIT STAGE 1 STAGE 2 50TJ VOLTAGES MANUAL OUTDOOR-AIR DAMPER — All units 26/34 (except those equipped with a factory-installed economizer) 208/230-3-60 42/56 have a manual outdoor-air damper to provide ventilation air. 56/75 Damper can be preset to admit up to 25% outdoor air into 380-3-60...

  • Page 12: Step 8 - Install Outdoor-Air Hood

    OAT was removed) using the 2 screws provided. See structions included with each accessory. Fig. 13. MOTORMASTER I CONTROL INSTALLATION (50TJ016 6. Reconnect the blue wire removed in Step 3 to the en- and 020 Only) thalpy sensor terminal +.

  • Page 13: Motormaster Iii Control Installation

    MOTORMASTER III CONTROL INSTALLATION (50TJ024 and 028 Only) Install Field-Fabricated Wind Baffles — Wind baffles must be field-fabricated for all units to ensure proper cooling cycle operation at low ambient temperatures. See Fig. 22 for baffle details. Use 20-gage, galvanized sheet metal, or similar corrosion-resistant metal for baffles.
  • Page 14 SENSOR SENSOR LOCATION LOCATION HAIRPIN END HAIRPIN END 50TJ016 50TJ020 NOTE: All sensors are located on the eighth hairpin up from the bottom. Fig. 23 — Motormaster I Sensor Locations NOTE: Dimensions in ( ) are in mm. Fig. 22 — Wind Baffle Details...

  • Page 15: Start-Up

    discharge line, and one on the liquid line. In addition Schrader- type valves are located underneath the low-pressure switches. Be sure that caps on the ports are tight. Compressor Rotation — It is important to be certain the compressors are rotating in the proper direction. To de- termine whether or not compressors are rotating in the proper direction: 1.
  • Page 16 1227 to 1550 (for 208/230-460 v units). The al- full horsepower and watts range of the motor can be utilized with ternate high-static drive is not available for 50TJ016 575-v units. Other confidence. Using your fan motors up to the watts or bhp rating rpms require a field-supplied drive.
  • Page 17 6. Use of a field-supplied motor may affect wiring size. Contact your 460 v). The maximum continuous watts for the 020 size is 5180. Carrier representative for details. The maximum continuous watts for the 024 size is 7915 (208/230, 575 v) or 8640 (380, 460 v). Do not adjust motor rpm such that...
  • Page 18 6. Use of a field-supplied motor may affect wiring size. Contact your 575 v) or 11,000 (380, 460 v). Do not adjust motor rpm such that Carrier representative for details. motor maximum bhp and/or watts is exceeded at the maximum...
  • Page 19 Table 8 — Accessory/FIOP Static Pressure (in. wg) — 50TJ016 COMPONENT 4500 5000 6000 7200 7500 Economizer 0.04 0.05 0.07 0.09 0.10 Glycol Coil 0.22 0.26 0.35 0.44 0.46 Electric Heat (kW) 0.06 0.07 0.09 0.11 0.12 26/34 0.06 0.07 0.09...

  • Page 20: Service

    EVAPORATOR COIL — Clean as required with a commer- Base Unit Operation cial coil cleaner. COOLING, UNITS WITHOUT ECONOMIZER — When NOTE: The 50TJ028 unit has a mist eliminator screen at- thermostat calls for cooling, terminals G and Y1 are ener- tached to the evaporator coil to prevent condensate runoff at gized.
  • Page 21 3. Make angular alignment by loosening motor from mount- ing plate. Evaporator Fan Service and Replacement 50TJ016 UNITS (See Fig. 26) NOTE: To remove belts only, follow Steps 1-6. 1. Remove filter and supply-air section panels. 2. Remove unit top panel.
  • Page 22 4. Using jacking bolt under motor base, raise motor to top Condenser-Fan Adjustment of slide and remove belt. Secure motor in this position 50TJ016,020 UNITS (Fig. 28) by tightening the nuts on the carriage bolts. 1. Shut off unit power supply.
  • Page 23 Refrigerant Charge — Amount of refrigerant charge 800 ohm resistor should remain connected is listed on unit nameplate and in Table 1. Refer to Carrier to S and +. GTAC II; Module 5; Charging, Recovery, Recycling, and Rec- E. Reconnect power to lamation section for charging methods and procedures.
  • Page 24 A complete list of replacement ternal thermostat) trip, or if there is loss of power to the parts may be obtained from any Carrier distributor upon compressors, the CLO (compressor lockout) will lock the request.
  • Page 25 Fig. 31 — Typical Wiring Schematic (50TJ016, 460-v Shown)
  • Page 26 Fig. 31 — Typical Wiring Schematic (50TJ016, 460-v Shown) (cont) LEGEND AND NOTES FOR FIG. 31 AND 32 — Adjustable Heat Anticipator — Indoor-Fan Contactor — Thermostat Heating BKR W/AT — Breaks with Amp Turns IFCB — Indoor-Fan Circuit Breaker TRAN —...
  • Page 27 Fig. 32 — Typical Component Arrangement (50TJ016 Shown)

  • Page 28: Troubleshooting

    TROUBLESHOOTING Refer to Table 13 for troubleshooting details. Table 13 — Cooling Service Analysis PROBLEM CAUSE REMEDY Compressor and Power failure. Call power company. condenser fan Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker. will not start. Defective thermostat, contactor, transformer, or control Replace component.
  • Page 30 Copyright 1998 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 PC 111 Catalog No. 565-135 Printed in U.S.A. Form 50TJ-14SI Pg 30 10-98 Replaces: 50TJ-13SI...

  • Page 32: Start-Up Checklist

    ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS VERIFY INSTALLATION OF ALL OPTIONS AND ACCESSORIES Copyright 1998 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

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