Carrier 50HJQ014 Installation, Start-Up And Service Instructions Manual
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Carrier 50HJQ014 Installation, Start-Up And Service Instructions Manual

Carrier 50HJQ014 Installation, Start-Up And Service Instructions Manual

Single-package rooftop heat pump units
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CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Step 1 - Provide Unit Support . . . . . . . . . . . . . . . 1
• ROOF CURB
Step 2 - Rig and Place Unit . . . . . . . . . . . . . . . . . . 1
• POSITIONING
• ROOF MOUNT
Step 3 - Field Fabricate Ductwork . . . . . . . . . . . . 1
Step 5 - Trap Condensate Drain . . . . . . . . . . . . . 3
• FIELD POWER SUPPLY
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Step 8 - Install Outdoor-Air Hood . . . . . . . . . . . . 8
Step 9 - Defrost Cycle . . . . . . . . . . . . . . . . . . . . . . 10
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-16
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-21
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 21-27
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 4
PC 111
Catalog No. 565-001
Tab
5a 5a
Installation, Start-Up
and Service Instructions
Page
Printed in U.S.A.
Single-Package Rooftop
Heat Pump Units
INSTALLATION

Step 1 - Provide Unit Support

ROOF CURB - Assemble and install accessory roof curb
in accordance with instructions shipped with the curb.
Accessory roof curb and information required to field
fabricate a roof curb are shown in Fig. 1 and 2. Install in-
sulation, cant strips, roofing, and counter flashing as shown.
Ductwork can be secured to roof curb before unit is set in
place. Horizontal adapter installation is shown in Fig. 3.
IMPORTANT: The gasketing of the unit to the roof
curb is critical for a watertight seal. Install gasket sup-
plied with the roof curb as shown in Fig. 1. Improp-
erly applied gasket can result in air leaks and poor unit
performance.
Curb should be level. This is necessary to permit unit drain
to function properly. Unit leveling tolerance is
linear ft in any direction. Refer to Accessory Roof Curb In-
stallation Instructions for additional information as required.
ALTERNATE UNIT SUPPORT - When the curb cannot
be used, support unit with sleepers using unit curb 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. 1 for additional leveling tolerance infor-
mation. Unit weight is shown in Table 1.
Four lifting holes are provided in ends of unit base rails
as shown in Fig. 4. Refer to rigging instructions on unit.
POSITIONING - Provide clearance around and above unit
for airflow, safety, and service access (Fig. 5 and 6).
Do not install unit in an indoor location. Do not locate air
inlets near exhaust vents or other sources of contaminated
air.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
ROOF MOUNT - Check building codes for weight distri-
bution requirements.

Step 3 - Field Fabricate Ductwork -

ducts to building structure. Use flexible duct connectors be-
tween unit and ducts as required. Insulate and weatherproof
all external ductwork, joints, and roof openings with counter
flashing and mastic in accordance with applicable codes.
Form 50HJQ-5SI
Pg 1
50HJQ014,016
1
⁄
in. per
16
Inspect unit for trans-
1
⁄
in. per linear ft in any
16
Secure all
2-97
Replaces: 50HJQ-3SI

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  • Page 1: Table Of Contents

    50HJQ014,016 Single-Package Rooftop Heat Pump Units Installation, Start-Up and Service Instructions CONTENTS INSTALLATION Page Step 1 — Provide Unit Support SAFETY CONSIDERATIONS ....1 ROOF CURB —...
  • Page 2 ACCESSORY CURB DESCRIPTION ‘‘A’’ ‘‘B’’ ‘‘C’’ PACKAGE NO. HEIGHT 1 -2 Standard Curb — 50PQ900221 — — — (305) 14 High Standard Curb 2 -0 50PQ900141 for Units Requiring — — — (610) High Installation 2 -0 Horizontal Supply 5 -6 0 -2 ⁄...

  • Page 3: Installation

    MAXIMUM SHIPPING WEIGHT UNIT 50HJQ 1895 2205 1000 DIMENSION A NOTE: For preassembled horizontal adapter (part no. 50DP900211), UNIT 50HJQ Ft-in. the accessory kit includes a factory-assembled, high-static, regain tran- sition duct. For horizontal roof (part no. 50PQ900151), a field- supplied transition duct is required.
  • Page 4 Table 1 — Physical Data UNIT SIZE 50HJQ 208/230, 460 V 575 V OPERATING WT (lb) Al/Al* 1615 1925 Al/Al Coated* 1615 1925 Unit Al/Cu* 1745 2075 Cu/Cu* 1815 2165 Electric Heat Economizer Roof Curb† COMPRESSOR Semi-Hermetic Type (Number) 06D-328 (1) 060-818 (2) Cylinders Oil Charge (oz.) (each circuit)
  • Page 5 8. Dimensions are from outside of corner post. Allow 0 - ⁄ (8) on each side for top cover drip edge. STANDARD UNIT WEIGHT ECONOMIZER WEIGHT 1615 lb (733 kg) 110 lb (50 kg) Fig. 5 — Base Unit Dimensions — 50HJQ014...
  • Page 6 NOTES: 1. Refer to print for roof curb accessory dimensions. 2. Dimensions in ( ) are in millimeters. Center of gravity. Direction of airflow. 5. Ductwork to be attached to accessory roof curb only. 6. Minimum clearance: • Rear: 7 -0 (2134) for coil removal. This dimension can be reduced to 4 -0 (1219) if conditions permit coil removal from the top.
  • Page 7 Transformers no. 1 and 2 are wired for 230-v unit. If 208/ 230-v unit is to be run with 208-v power supply, the trans- formers must be rewired as follows: 1. Remove cap from red (208 v) wire. 2. Remove cap from orange (230 v) spliced wire. 3.

  • Page 8: Field Control Wiring

    2. Assemble hood top panel and side panels, upper filter re- cause damage to electrical components. tainer, and hood drain pan (Fig. 20). FIELD CONTROL WIRING — Install a Carrier-approved 3. Secure lower filter retainer and long piece of filter sup- accessory thermostat assembly according to the installation port bracket to unit.
  • Page 9 Table 2 — Electrical Data OUTDOOR COMPRESSOR VOLTAGE INDOOR FAN POWER DISCONNECT ELECTRIC HEAT* POWER SUPPLY VOLTAGE RANGE MOTOR EXHAUST SIZING UNIT No. 1 No. 2 MOTOR (3 Ph, 50HJQ 60 Hz) Min Max RLA LRA RLA LRA FLA LRA MOCP†...

  • Page 10: Step 9 - Defrost Cycle

    Fig. 13 — Field Control Thermostat Wiring Table 3 — Heat Anticipator Settings UNIT HEATER UNIT 50HJQ STAGE 1 STAGE 2 VOLTAGE 14/19 — 208/230 26/34 42/56 — LED — Light Emitting Diode Fig. 16 — Economizer Control Module 26/34 208/230 42/56 Fig.
  • Page 11 LOWER FILTER RETAINER FILTER SUPPORT BRACKET HOOD SIDE PANELS (2) HOOD TOP PANEL Fig. 18 — Outdoor-Air Hood Component Location LOWER FILTER RETAINER FILTER SUPPORT BRACKET HOOD DRAIN PAN UPPER FILTER RETAINER NOTE: The outdoor-air hood kit contains a baffle which is not used on the 50HJQ units.

  • Page 12: Start-Up

    1135 2650 3.02 1213 2912 3.32 1284 3175 3.62 1352 3435 3.91 Table 5A — Fan Performance Data, 50HJQ014; 208/230, 460 V Units (cont) EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) Watts Watts Watts Watts Watts 3750 1190 1526 1.74...
  • Page 13 2.73 1135 2650 3.02 1213 2912 3.32 1284 3175 3.62 1352 3435 3.91 Table 5B — Fan Performance Data, 50HJQ014; 575 V Units (cont) EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) Watts Watts Watts Watts Watts 3750 1190 1526 1.74...
  • Page 14 Table 6 — Fan Performance Data, 50HJQ016 Units EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) Watts Watts Watts Watts Watts 4500 1205 1483 1786 4800 1085 1346 1630 1938 5100 1229 1500 1791 1006 2104 5400 1118 1389 1669 1968 1019 2286 5700...
  • Page 15 Outdoor-air inlet screens Upon a second-stage call for cooling, compressor no. 1 must be in place before operating unit. (50HJQ016) or unloaded compressor (50HJQ014) is ener- gized and mechanical cooling is integrated with economizer Accessory Field-Installed Economizer Adjust- cooling. Compressor no. 2 (50HJQ016) is locked out. If the ment —...
  • Page 16 If the 5-minute compressor time delay (CTD) on the defrost indoor coil freezestat, or by compressor internal line-break board (DB) is satisfied, then compressor (50HJQ014) or com- device (overcurrent or overtemperature), and compressor is pressor no. 1 (50HJQ016) contactor is energized and com- calling for either cooling or heating, Cycle-LOC protection pressor will start.

  • Page 17: Service

    Indoor Fan, 50HJQ014 Units PERFORMANCE ADJUSTMENT — Fan motor pulleys on SERVICE AND REPLACEMENT (See Fig. 27) — The the 50HJQ014 units are factory set for speed shown in 50HJQ016 units use a fan motor mounting system that fea- Table 1.
  • Page 18 3. Adjust the vent position with the minimum position ad- justment on the economizer control module. See Fig. 16. 4. Set the system selector switch to COOL position and set the cooling temperature selector to its lowest setting. Fig. 26 — 50HJQ014 Indoor-Fan Motor Section...
  • Page 19 Do not manually operate damper motor. Refrigerant Charge — Amount of refrigerant charge is listed on unit nameplate and in Table 1. Refer to Carrier GTAC II; Module 5; Charging, Recovery, Recycling, and Reclamation section for charging methods and procedures. NOTE: A 3 ⁄...
  • Page 20 After evacuating system, weigh in the specified amount of refrigerant (refer to Table 1). Fig. 29 — Cooling Charging Chart, 50HJQ014 Units LOW CHARGE, COOLING — Using appropriate cooling charging chart (see Fig. 29 and 30), add refrigerant until con- ditions of the chart are met.

  • Page 21: Troubleshooting

    24 hours before starting the compressors. Replacement Parts — A complete list of replacement parts may be obtained from any Carrier distributor upon request. Compressor Lockout — If any of the safeties (high- or low- pressure, freeze protection thermostat, compressor internal...
  • Page 22 ELECTRIC HEAT AHA SETTING 208/240 V 208/240 V Amps 72/ 82 25.7/34.2 1.00 0.52 117/135 42.3/56.1 1.00 0.78 Fig. 31 — Typical Label Diagram, Schematic (50HJQ016, 208/230 V, 60 Hz Unit Shown)
  • Page 23 Fig. 31 — Typical Label Diagram, Schematic (50HJQ016, 208/230 V, 60 Hz Unit Shown) (cont)
  • Page 24 LEGEND AND NOTES FOR FIG. 31 LEGEND — Adjustable Heat Anticipator — Lockout Relay BRK W/AT — Breaks With Amp Turns — Low-Pressure Switch — Contactor, Compressor — Limit Switch — Capacitor — Mixed-Air Thermostat — Circuit Breaker — Outdoor-Air Thermostat —...
  • Page 25 → — Refrigerant Flow Direction NOTES: 1. Hot gas from compressor flows through the 4-way valve and is — Check Valve Flow Direction directed to the outdoor-coil header. At the header it is condensed — Fixed Orifice and subcooled through converging circuits (7-2-1). Refrigerant leaves the outdoor coil by way of the check valve to the liquid line.
  • Page 30 For a free Service Training Material Catalog (STM), call 1-800-962-9212. Ordering instructions are included. Copyright 1997 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.

  • Page 32: Start-Up Checklist

    VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS ON PAGE 20 GENERAL ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS Copyright 1997 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.

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