Carrier 50HJQ016 Installation, Start-Up And Service Instructions Manual

Single-package rooftop heat pump units

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Installation, start-up and service instructions manual (48 pages)

Installation, start-up and service instructions manual (32 pages)

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SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can

be hazardous due to system pressure and electrical compo-

nents. 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, observe precau-

tions 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 extinguisher 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.

PC 111

Book 1

Tab

5a 5a

Installation, Start-Up

and Service Instructions

Page

Catalog No. 535-00026

Printed in U.S.A.

50HJQ014-016

Single-Package Rooftop

Heat Pump Units

INSTALLATION

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.

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 insulation, cant strips, roofing,

and counter flashing as shown. Ductwork can be secured to

roof curb before unit is set in place. Horizontal adapter installa-

tion is shown in Fig. 3.

IMPORTANT: The gasketing of the unit to the roof curb

is critical for watertight seal. Install gasket supplied with

the roof curb as shown in Fig. 1. Improperly 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 tolerances is ±

linear ft in any direction. Refer to Accessory Roof Curb Instal-

lation 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 mini-

mum 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 ±

in. per linear ft in any direction.

See Fig. 1 for additional leveling tolerance information. 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 in-

lets 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 distribu-

tion requirements.

Form 50HJQ-8SI

Pg 1

in. per

Inspect unit for trans-

4-01

Replaces: 50HJQ-5SI

Table of Contents

Summary of Contents for Carrier 50HJQ016

Page 1: Table Of Contents
50HJQ014-016 Single-Package Rooftop Heat Pump Units Installation, Start-Up and Service Instructions CONTENTS INSTALLATION Page IMPORTANT: Units have high ambient operating lim- SAFETY CONSIDERATIONS ..... . 1 its.
Page 3: Step 3 - Field Fabricate Ductwork
MAXIMUM SHIPPING WEIGHT UNIT 50HJQ 1895 2205 1000 DIMENSION A NOTE: preassembled horizontal adapter (part CRRFCURB013A00), the accessory kit includes a factory-assembled, UNIT 50HJQ Ft-in. high-static, regain transition duct. For horizontal roof (part no. CRRFCURB012A00), a field-supplied transition duct is required. 1059 Fig.
Page 4 Table 1 — Physical Data UNIT SIZE 50HJQ 208/230, 460 V 575 V OPERATING WT (lb) Al/Al* 1615 1925 1615 1925 Al/Al Coated* Unit Al/Cu* 1745 2075 Cu/Cu* 1815 2165 Electric Heat EconoMi$er Roof Curb† COMPRESSOR Semi-Hermetic Type (Number) 06D-328 (1) 06D-818 (2) Cylinders Oil Change (oz.) (each circuit)
Page 5 NOTES: 1. Refer to print for roof curb accessory dimensions. 2. Dimensions in ( ) are in millimeters. Center of Gravity. Direction of airflow. 5. Ductwork to be attached to accessory roof curb only. 6. Minimum clearance: • Rear: 7′-0″ (2134) for coil removal. This dimension can be reduced to 4′-0″...
Page 6 9. A 90 degree elbow must be installed on the supply ductwork below the unit discharge for units equipped with electric heat. STANDARD UNIT WEIGHT ECONOMI$ER WEIGHT 1925 lb (874 kg) 80 lb (36 kg) Fig. 6 — Base Unit Dimensions — 50HJQ016...
Page 7: Step 6 - Make Electrical Connections
3. Replace orange wire with red wire. water leak. 4. Recap both wires. Fig. 7 — Air Distribution — Thru-the-Bottom (50HJQ016 Shown) IMPORTANT: BE CERTAIN UNUSED WIRES ARE CAPPED. Failure to do so may damage the transformers. Operating voltage to compressor must be within voltage range indicated on unit nameplate.
Page 8 Table 2 — Electrical Data COMPRESSOR OUTDOOR DISCONNECT VOLTAGE INDOOR FAN POWER ELECTRIC HEAT* POWER SUPPLY VOLTAGE SIZING RANGE MOTOR EXHAUST UNIT No. 1 No. 2 MOTOR (3 Ph, 50HJQ 60 Hz) Min Max RLA LRA RLA LRA Qty FLA LRA MOCP†...
Page 9: Field Control Wiring
Fig. 12 — Field Power Wiring Connections Fig. 13 — Field Control Thermostat Wiring FIELD CONTROL WIRING — Install a Carrier-approved Table 3 — Heat Anticipator Settings accessory thermostat assembly according to the installation instructions included with the accessory. Refer to unit Price...
Page 10: Step 7 - Make Outdoor-Air Inlet Adjustments
6T3 4T2 2T1 LOAD 5L3 3L2 1L1 LINE CONTROL MODULE ACTUATOR ECONOMI$ER NOTE: The disconnect takes the place of TB-1 as shown on the unit wiring diagram label and the component arrangement label. Fig. 14 — Optional Non-Fused Disconnect Wiring Fig.
Page 11: Step 8 - Install Outdoor-Air Hood
Step 8 — Install Outdoor-Air Hood — The same type of factory-installed hood is used on units with 25% air ventilation and units with an EconoMi$er. NOTE: The hood top panel, upper and lower filter retainers, hood drain pan, and filter support bracket are secured opposite the condenser end of the unit.
Page 12 COMMISSIONING — The EconoMi$er saves energy when DISCHARGE AIR THERMISTOR (DAT) — The discharge it uses outdoor air to provide free cooling instead of mechani- air thermistor is factory-mounted on the supply-fan housing in cal air conditioning. The EconoMi$er switchover strategy de- the fan section of the unit.
Page 13 Table 4 — EconoMi$er Switchover Control Strategy SENSORS REQUIRED ECONOMI$ER SWITCHOVER STRATEGY Outdoor Air Temperature Outdoor Air Enthalpy Return Air Temperature Return Air Enthalpy Dry Bulb Single Enthalpy Differential Temperature Differential Enthalpy* *Must be selected manually. Table 5 — Changeover Set Points Table 6 —...
Page 14: Step 9 - Install All Accessories
Step 9 — Install All Accessories — Accessory 0° F Low Ambient Kit — Install the Accessory 0° F After all the Low Ambient Kit per instruction supplied with accessory. factory-installed options have been adjusted, install all field- installed accessories. Refer to the accessory installation instruc- Sensor Assembly —...
Page 15: Start-Up
See Table 11 for fan rpm pulley settings. To alter fan perfor- lation is required to be mance, see Indoor-Fan, 50HJQ014 Units and Indoor-Fan, installed over the TXV bulb 50HJQ016 Units sections, page 21. capillary tube proper operation at low Table 7 —...
Page 16 Table 8A — Fan Performance Data, 50HJQ014; 208/230, 460 V Units EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) Watts Watts Watts Watts Watts 3750 0.55 0.78 1.01 1028 1097 1.25 1111 1309 1.49 4000 0.70 0.94 1034 1.18 1050 1247 1.42 1131 1463...
Page 17 Table 8B — Fan Performance Data, 50HJQ014; 575 V Units EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) Watts Watts Watts Watts Watts 3750 0.55 0.78 1.01 1028 1097 1.25 1111 1309 1.49 4000 0.70 0.94 1034 1.18 1050 1247 1.42 1131 1463 1.67...
Page 18 Table 9 — 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 1500 1791 1006 2104 5100 1229 5400 1118 1389 1669 1968...
Page 19 5-minute delay. compressor no. 2 contactor. Compressor (50HJQ014) or com- pressor no. 2 (50HJQ016) and indoor and outdoor fan motors On 50HJQ016 units, with an additional rise in room temper- start. If the 5-minute CTD on the DB is satisfied, then compres- ature, cooling contactor no.
Page 20 Table 10 — Accessory/FIOP Static Pressure (in. wg) ACCESSORY/FIOP UNIT SIZE UNIT VOLTAGE 3750 4000 4500 5000 5600 6000 6250 7200 7500 14,34 0.05 0.05 0.06 0.07 0.08 0.09 0.09 208/230-3-60 † † 42,56 0.06 0.06 0.07 0.08 0.10 0.12 0.13 15,32 0.05...
Page 21: Service
Observe the level in the sight glass immediately after shutdown while the oil is still Indoor Fan, 50HJQ016 Units warm. If the oil level is observed when the oil is cold, the level PERFORMANCE ADJUSTMENT —...
Page 22 Fig. 32 — Compressor Sight Glass Oil Level SERVICE AND REPLACEMENT (See Fig. 35) — The 50HJQ016 units use a fan motor mounting system that features a slide-out motor mounting plate. To replace or service the motor, slide out the bracket.
Page 23 Refrigerant Charge — 3. Non-critical fault Amount of refrigerant charge is listed on unit nameplate and in Table 1. Refer to Carrier If any sensors are opened, shorted, or removed, the GTAC II; Module 5; Charging, Recovery, Recycling, and Rec- EconoMi$er determines whether the failure is critical or non- lamation section for charging methods and procedures.
Page 24: Troubleshooting
Replacement Parts — A complete list of replacement case heaters to prevent absorption of liquid refrigerant by oil in parts may be obtained from any Carrier distributor upon the crankcase when the compressor is idle. Since power for the request.
Page 25 Fig. 38 — Cooling Charging Chart, 50HJQ016 Units Fig. 37 — Cooling Charging Chart, 50HJQ014 Units Table 13 — Check Valve Functions COOLING CYCLE HEATING CYCLE CHECK VALVE COOLING HEATING CHECK VALVE STUCK CHECK VALVE STUCK IDENTIFICATION LOCATION CYCLE CYCLE (See Fig.
Page 26 Fig. 39 — Typical Wiring Diagram (50HJQ014, 208/230-3-60 V Shown)
Page 27 Fig. 39 — Typical Wiring Diagram (50HJQ014, 208/230-3-60 V Shown) (cont)
Page 28 LEGEND AND NOTES FOR FIG. 39 LEGEND — Adjustable Heat Anticipator — Lockout Relay BRK W/AT — Breaks With Amp Turns — Low-Pressure Switch — Contactor, Compressor — Limit Switch — Capacitor — National Electrical Code — Circuit Breaker — Outdoor-Air Thermostat —...
Page 29 *See Table 13 for check valve operation details. NOTE: Circuitry shown is for single system; 50HJQ016 units have 2 individual and independent refrigeration systems that each operate in an identical manner.
Page 34 CALL FOR FREE CATALOG 1-800-962-9212 [ ] Packaged Service Training [ ] Classroom Service Training Copyright 2001 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. PC 111 Catalog No.
Page 36: Start-Up Checklist
VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS ON PAGE 25 GENERAL ECONOMI$ER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS Copyright 2001 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. PC 111 Catalog No.

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Carrier 50HJQ016 Installation, Start-Up And Service Instructions Manual

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SAFETY CONSIDERATIONS

INSTALLATION

Step 1 - Provide Unit Support

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Summary of Contents for Carrier 50HJQ016

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