Carrier 50HS018 Installation, Start-Up And Service Instructions Manual
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Carrier 50HS018 Installation, Start-Up And Service Instructions Manual

Carrier 50HS018 Installation, Start-Up And Service Instructions Manual

Single-package heat pump units
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CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . 1-6
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
RECEIVING AND INSTALLATION . . . . . . . . . . . . 7-17
Step 1 - Check Equipment . . . . . . . . . . . . . . . . . . . 7
Step 2 - Provide Unit Support . . . . . . . . . . . . . . . 7
Step 3 - Provide Clearances . . . . . . . . . . . . . . . . . 7
Step 4 - Rig and Place Unit . . . . . . . . . . . . . . . . . . 8
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-27
Check for Refrigerant Leaks . . . . . . . . . . . . . . . . . 18
Unit Start-Up Adjustments . . . . . . . . . . . . . . . . . . . 18
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-31
Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Unit Top Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Indoor Blower and Motor . . . . . . . . . . . . . . . . . . . . 28
Drain Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Outdoor Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Electrical Controls and Wiring . . . . . . . . . . . . . . . 29
Refrigerant Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Indoor Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Metering Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Liquid Line Strainers . . . . . . . . . . . . . . . . . . . . . . . . 30
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . CL-1
NOTE TO INSTALLER - Before the installation, READ
THESE INSTRUCTIONS CAREFULLY AND COM-
PLETELY. Also, make sure the Owner's Manual and Serv-
ice Instructions are left with the unit after installation.
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. 565-041
Tab
5a 5a
Single-Package Heat Pump Units
Installation, Start-Up and
Service Instructions
Page
Printed in U.S.A.
Fig. 1 - Model 50HS

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment
can be hazardous due to system pressure and electrical com-
ponents. Only trained and qualified personnel should install,
repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance func-
tions of cleaning coils and 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. Wear safety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire ex-
tinguisher available for all brazing operations.
Before performing service or maintenance operations on
system, turn off main power to unit. Turn off accessory
heater power switch if applicable. Electrical shock can
cause personal injury.

General -

50HS heat pumps are fully self-contained and
designed for outdoor installation. See Fig. 1. As shown in
Fig. 2-5, all units are shipped in a horizontal-discharge con-
figuration for installation on a ground-level slab. All units
can be converted to downflow (vertical) discharge configu-
rations for rooftop applications. See Fig. 6 for roof curb
dimensions.
Form 50HS-9SI
Pg 1
2-97
Replaces: 50HS-8SI

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  • Page 1: Table Of Contents

    50HS018-060 Single-Package Heat Pump Units Installation, Start-Up and Service Instructions CONTENTS Page SAFETY CONSIDERATIONS ....1-6 General ........1 RECEIVING AND INSTALLATION .
  • Page 2 UNIT WT CORNER WT (Lb/Kg) UNIT HEIGHT (in./mm) DIMENSION (in./mm) ELECTRICAL UNIT CHARACTERISTICS 50HS018 208/230-1-60 66/30 45/20 95/43 42/19 24.1/613 18.2/462 50HS024 208/230-1-60 68/31 46/21 97/44 45/20 24.1/613 18.2/462 50HS030 208/230-1-60, 208/230-3-60 66/30 58/26 91/41 53/24 24.1/613 18.2/462 50HS036 208/230-1-60, 208/230-3-60, 460-3-60...
  • Page 3 UNIT WT CORNER WT (Lb/Kg) UNIT HEIGHT (in./mm) DIMENSION (in./mm) ELECTRICAL UNIT CHARACTERISTICS 50HS018 208/230-1-60 70/32 50/23 100/45 48/22 27.43/697 21.50/546 50HS024 208/230-1-60 73/33 51/23 102/46 50/23 27.43/697 21.50/546 50HS030 208/230-1-60, 208/230-3-60 71/32 63/29 96/44 58/26 27.43/697 21.50/546 50HS036 208/230-1-60, 208/230-3-60, 460-3-60...

  • Page 4: Hs018

    UNIT WT CORNER WT (Lb/Kg) CENTER OF GRAVITY (in./mm) ELECTRICAL UNIT UNIT CHARACTERISTICS 50HS048 208/230-1-60, 208/230-3-60, 460-3-60 89/40 81/37 113/51 76/35 50HS048 19.7/500 20.5/522 15.0/381 50HS060 208/230-1-60, 208/230-3-60, 460-3-60 92/42 85/39 116/53 80/36 50HS060 19.7/499 20.6/523 15.0/381 REQ’D CLEARANCES FOR SERVICING — in. (mm) LEGEND NOTE: Clearances must be maintained to prevent Indoor Coil Access Side .
  • Page 5 UNIT WT CORNER WT (Lb/Kg) CENTER OF GRAVITY (in./mm) ELECTRICAL UNIT UNIT CHARACTERISTICS 50HS048 208/230-1-60, 208/230-3-60, 460-3-60 94/43 86/39 118/54 81/37 50HS048 19.6/498 20.6/524 17.3/440 50HS060 208/230-1-60, 208/230-3-60, 460-3-60 97/44 90/41 121/55 85/39 50HS060 19.6/497 20.6/524 17.3/440 REQ’D CLEARANCES FOR SERVICING — in. (mm) NEC REQ’D CLEARANCES —...
  • Page 6 PART NUMBER ‘‘A’’ CPRFCURB001A00 8 [203] Flat CPRFCURB002A00 11 [279] CPRFCURB003A00 14 [356] NOTES: 1. Roof curb must be set up for unit being installed. 2. Seal strip must be applied as required for unit being installed. 3. Dimensions in [ ] are in millimeters. 4.

  • Page 7: Receiving And Installation

    The required mini- Check all items against shipping list. Immediately notify mum service clearances and clearances to combustibles are the nearest Carrier Air Conditioning office if any item is shown in Fig. 2-5. Adequate ventilation and outdoor air must missing.

  • Page 8: Step 4 - Rig And Place Unit

    Install accessory rigging brackets as follows: Step 4 — Rig and Place Unit — Use spreader bars or crate top when rigging the unit. The units must be rigged 1. Position brackets as close to the corners of unit as pos- for lifting as shown in Fig.
  • Page 9 NOTICE TO RIGGERS SHIPPING UNIT Hook rigging shackles through holes in lifting brackets, as shown in WEIGHT 50HS detail ‘‘A.’’ Lifting brackets to be centered around the unit center of SIZE gravity. Use wood top skid when rigging, to prevent rigging straps 16.1 28.2 from damaging unit.

  • Page 10: Step 5 - Select And Install Ductwork

    • Size ductwork for cooling air quantity (cfm). The mini- Step 5 — Select and Install Ductwork — The de- mum air quantity for proper electric heater operation is sign and installation of the duct system must be in accor- listed in Table 2.

  • Page 11: Converting Horizontal Discharge Units To Downflow (Vertical) Discharge

    CONVERTING HORIZONTAL DISCHARGE UNITS TO 13. Cover the horizontal duct openings. Duct covers can be DOWNFLOW (VERTICAL) DISCHARGE — The 50HS ordered as an accessory or be field-fabricated as shown units are shipped in a horizontal configuration. To convert a in Fig.
  • Page 12 REMOVE Fig. 17 — Blower Shelf and Housing INDOOR BLOWER ACCESS PANEL SCREWS Fig. 15 — Indoor Blower Access Panel DEFROST BOARD CONTACTOR RELAY Fig. 18 — Basepan Insulation Over Vertical Discharge Opening Fig. 16 — Fan Motor Leads Fig. 19 — Insulation and Cover Removed from Vertical Discharge Opening...
  • Page 13 NOTES: 1. An accessory duct cover is available as an alternative to field fabrication. 2. Construct duct cover out of 22-gage sheet metal. 3. Dimensions in ( ) are in millimeters. Fig. 20 — Field-Fabricated Duct Cover...

  • Page 14: Accessory Duct Flange Kit Installation

    ACCESSORY DUCT FLANGE KIT INSTALLATION — Refer to Fig. 21 for duct adapter dimensions and hole locations. 1. Mark hole locations shown in Fig. 21. 2. At marked locations, drill holes using a no. 26 (.147-in.) twist drill. Fig. 22 — Drain Tubing Connection and 3.
  • Page 15 — Outdoor-Fan Motor — Rated Load Amps Maximum deviation is 7 v. Determine percent of voltage imbalance. *Carrier Scroll Compressor. †Copeland Scroll Compressor. % Voltage Imbalance = 100 x NOTES: 1. In compliance with NEC requirements for multimotor and combi- = 1.53%...

  • Page 16: Routing Power Leads Into Unit

    ROUTING POWER LEADS INTO UNIT — Use only cop- The unit transformer supplies 24-v power for complete per wire between disconnect and unit. The high-voltage leads system including accessory electrical heater. An automatic- should be in a conduit until they enter the duct panel; con- reset circuit breaker is provided in the 24-v circuit;...

  • Page 17: Special Procedures For 208-Voperation

    SPECIAL PROCEDURES FOR 208-V OPERATION Use the Start-Up Checklist supplied at the end of this book and proceed as follows to inspect and prepare the unit for initial start-up: 1. Remove all access panels. Make sure that the power supply to the unit is switched OFF before making any wiring changes.

  • Page 18: Start-Up

    CHECKING AND ADJUSTING REFRIGERANT CHARGE START-UP — The refrigerant system is fully charged with R-22 refrig- Use the Start-Up Checklist supplied at the end of this book, erant, and is tested and factory sealed. and proceed as follows: NOTE: Adjustment of the refrigerant charge is not required unless the unit is suspected of not having the proper R-22 Check for Refrigerant Leaks —...
  • Page 19 Table 4A — Superheat Charging Table, 50HS018 INDOOR AIR — 675 CFM TEMP (F) OUTDOOR Indoor Air — Ewb (F) 39.9 39.9 40.0 40.0 42.7 45.4 48.1 48.3 48.5 48.8 48.6 48.4 34.9 34.9 34.9 35.0 38.3 41.6 45.0 45.6 46.1...
  • Page 20 Table 4D — Superheat Charging Table, 50HS036 INDOOR AIR — 1300 CFM TEMP (F) OUTDOOR Indoor Air — Ewb (F) 16.7 18.7 20.7 22.7 27.4 32.1 36.8 37.7 38.6 39.5 39.6 39.8 12.9 13.8 14.8 15.9 22.1 28.4 34.8 35.6 36.5 37.4 37.6...
  • Page 21 Table 4G — Superheat Charging Table, 50HS060 INDOOR AIR — 2000 CFM TEMP (F) OUTDOOR Indoor Air — Ewb (F) 24.8 24.8 24.8 24.8 25.6 26.4 27.2 28.0 28.8 29.6 29.0 28.5 20.8 20.8 20.8 20.8 21.9 23.0 24.1 25.2 26.3 27.5 27.3...
  • Page 22 INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS UNIT CONTROLS — All compressors have the following internal-protection controls. High-Pressure Relief Valve — This valve opens when the pressure differential between the low and high side becomes For cooling operation, the recommended airflow is excessive.
  • Page 23 Table 6 — Dry Coil Air Delivery* — Horizontal Discharge (Deduct 10% for 208 v) 230 AND 460 V HORIZONTAL DISCHARGE UNIT MOTOR SIZE External Static Pressure (in. wg) SPEED 50HS Watts — — — — — — — — —...
  • Page 24 Table 7 — Dry Coil Air Delivery* — Vertical Discharge (Deduct 10% for 208 v) 230 AND 460 V VERTICAL DISCHARGE UNIT MOTOR SIZE External Static Pressure (in. wg) SPEED 50HS Watts — — — — — — — — —...
  • Page 25 Table 8 — Wet Coil Pressure Drop UNIT SIZE AIRFLOW PRESSURE DROP 50HS (cfm) (in. wg) 0.069 0.082 0.102 0.116 0.039 0.058 0.075 0.088 0.088 1000 0.095 1200 0.123 1000 0.082 1200 0.102 1400 0.120 1600 0.143 1000 0.048 1200 0.069 1400 0.088...
  • Page 26 OUTDOOR COIL INDOOR COIL STRAINER Check Valves Closed Open Closed Open LEGEND LCS — Loss of Charge Switch Acutrol™ Metering Device Check Valve (Arrow indicates direction of flow) *No outdoor coil check valve on 50HS048. COOLING CYCLE 1. Hot gas from compressor flows through the 4-way valve and is 3.
  • Page 27 OUTDOOR COIL INDOOR COIL STRAINER Check Valves Open Closed Open Closed LEGEND LCS — Loss of Charge Switch Acutrol™ Metering Device Check Valve (Arrow indicates direction of flow) *No outdoor coil check valve on 50HS048. HEATING CYCLE 1. Hot gas from compressor flows through the 4-way valve and is 3.

  • Page 28: Maintenance

    Only qualified service personnel should perform mainte- MAINTENANCE nance and service procedures that require unit top removal. To ensure continuing high performance, and to minimize Refer to the following top removal procedures: the possibility of premature equipment failure, periodic main- 1.

  • Page 29: Outdoor Coil, Indoor Coil, And Condensate

    c. Lift wheel from housing. When handling and/or clean- ing blower wheel, be sure not to disturb balance weights (clips) on blower wheel vanes. d. Remove caked-on dirt from wheel and housing with a brush. Remove lint and/or dirt accumulations from wheel and housing with vacuum cleaner, using soft brush at- tachment.

  • Page 30: Indoor Airflow

    Indoor Airflow — Liquid Line Strainers — The indoor airflow does not require The liquid line strainers (to checking unless improper performance is suspected. If a prob- protect metering device) are made of wire mesh and are lo- lem exists, be sure that all supply- and return-air grilles are cated in the liquid lines on the inlet side of the metering open and free from obstructions, and that the air filter is clean.
  • Page 31 Table 11 — Cooling and Heating Troubleshooting Chart (cont) SYMPTOM CAUSE REMEDY Excessive head Dirty air filter Replace filter. pressure. Dirty indoor or outdoor coil Clean coil. Refrigerant overcharged Recover excess refrigerant. Air in system Recover refrigerant, evacuate system, and recharge. (Heat) Indoor air restricted or recirculating Determine cause and correct.
  • Page 34 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. 565-041 Printed in U.S.A. Form 50HS-9SI Pg 34 2-97...

  • Page 36: Start-Up Checklist

    VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS ON PAGES 19-21. VERIFY 3-PHASE SCROLL COMPRESSOR (048,060 ONLY) IS ROTATING IN CORRECT DIRECTION. Copyright 1997 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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