Carrier 50ZH024-060 Installation, Start-Up And Service Instructions Manual
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Carrier 50ZH024-060 Installation, Start-Up And Service Instructions Manual

Packaged heat pump units
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Installation, Start-Up and Service Instructions
NOTE: Read the entire instruction manual before starting the
installation.

TABLE OF CONTENTS

SAFETY CONSIDERATIONS .....................................................1
INTRODUCTION ..........................................................................2
RECEIVING AND INSTALLATION ..........................................2
Check Equipment......................................................................2
IDENTIFY UNIT ................................................................2
INSPECT SHIPMENT ........................................................2
Provide Unit Support ................................................................2
SLAB MOUNT ...................................................................2
GROUND MOUNT ............................................................2
Provide Clearances....................................................................2
Place Unit..................................................................................2
Select and Install Ductwork .....................................................2
TIONS (50ZH060 ONLY) ..................................................6
DOWNFLOW (VERTICAL) DISCHARGE......................6
Provide for Condensate Disposal .............................................6
Install Electrical Connections...................................................7
HIGH-VOLTAGE CONNECTIONS..................................7
ROUTING POWER LEADS INTO UNIT ........................8
GROUND ............................................................................8
ROUTING CONTROL POWER WIRES ..........................8
ACCESSORY ELECTRIC HEAT WIRING .....................8
PRE-START-UP ............................................................................9
START-UP .....................................................................................9
Check for Refrigerant Leaks ..................................................10
CHARGE THE UNIT AS FOLLOWS: ...........................10
COMPRESSOR ROTATION ...........................................10
Refrigerant Charge..................................................................10
NO CHARGE ....................................................................10
LOW CHARGE COOLING .............................................10
HEATING MODE CHARGE...........................................11
Indoor Airflow and Airflow Adjustments..............................11
FOR 208/230-V .................................................................12
FOR 460-V MOTORS ......................................................12
Unit Controls...........................................................................12
HIGH-PRESSURE RELIEF VALVE...............................12
LOSS OF CHARGE SWITCH.........................................12
COMPRESSOR OVERLOAD..........................................12
Sequence of Operation............................................................12
FAN OPERATION............................................................12
COOLING..........................................................................14
HEAT PUMP HEATING..................................................14
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
PC 101
Catalog No. 535-00080
Tab
6
8
Printed in U.S.A.
Packaged Heat Pump Units
DEFROST..........................................................................15
ELECTRIC RESISTANCE HEATING............................15
MAINTENANCE.........................................................................15
Air Filter..................................................................................16
Unit Top Removal (Outdoor-Coil Side) ................................16
Indoor Blower and Motor.......................................................16
Outdoor Fan ............................................................................17
Electrical Controls and Wiring...............................................18
Refrigerant Circuit ..................................................................18
Indoor Airflow ........................................................................18
Metering Devices ....................................................................18
Lubrication ..............................................................................18
Liquid Line Strainer................................................................18
High Flow Valves...................................................................19
TROUBLESHOOTING ...............................................................22
START-UP CHECKLIST............................................................23
NOTE TO INSTALLER-Before installation, READ THESE
INSTRUCTIONS CAREFULLY AND COMPLETELY. Also,
make sure the User's Manual and Replacement Guide are left with
the unit after installation.
Fig. 1-Unit 50ZH

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified workers should install, repair, or service
air-conditioning equipment.
Untrained workers can perform basic maintenance functions of
cleaning coils and filters. All other operations should be performed
by trained service people. When working on air-conditioning
Form 50ZH-5SI
Pg 1
50ZH024-060
C00155
7-03
Replaces: 50ZH-4SI

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  • Page 1: Table Of Contents

    Visit www.carrier.com Installation, Start-Up and Service Instructions NOTE: Read the entire instruction manual before starting the installation. TABLE OF CONTENTS SAFETY CONSIDERATIONS ...1 INTRODUCTION ...2 RECEIVING AND INSTALLATION ...2 Check Equipment...2 IDENTIFY UNIT ...2 INSPECT SHIPMENT ...2 Provide Unit Support ...2 SLAB MOUNT ...2...

  • Page 2: Introduction

    Manufacturer is not responsible for any damage incurred in transit. Check all items against shipping list. Immediately notify the nearest Carrier Air Conditioning office if any item is missing. To prevent loss or damage, leave all parts in original packages until installation.
  • Page 3 UNIT ELECTRICAL CHARACTERISTICS 50ZH024 208/230-1-60 208/230-1-60, 50ZH030 208/230–3–60 Fig. 2—Unit Base Dimensions, 50ZH024-030 REQUIRED CLEARANCE TO COMBUSTIBLE MA TL. TOP OF UNIT...0 DUCT SIDE OF UNIT...0 SIDE OPPOSITE DUCTS ...0 BOTTOM OF UNIT ...0 NEC. REQUIRED CLEARANCES. BETWEEN UNITS, POWER ENTRY SIDE ...42.00 [1066.8] UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0] UNIT AND BLOCK OR CONCRETE WALLS AND OTHER GROUNDED SURFACES, POWER ENTRY SIDE...42.00 [1066.8]...
  • Page 4 UNIT ELECTRICAL CHARACTERISTICS 208/230-1-60, 208/230-3-60, 50ZH036 460–3–60 208/230-1-60, 208/230-3-60, 50ZH042 460–3–60 208/230-1-60, 208/230-3-60, 50ZH048 460–3–60 Fig. 3—Unit Base Dimensions, 50ZH036–048 REQUIRED CLEARANCE TO COMBUSTIBLE MATL. TOP OF UNIT...0 DUCT SIDE OF UNIT...0 SIDE OPPOSITE DUCTS ...0 BOTTOM OF UNIT ...0 NEC.
  • Page 5 UNIT ELECTRICAL CHARACTERISTICS 50ZH060 208/230-1-60, 208/230-3-60, 460-3-60 Fig. 4—Unit Base Dimensions, 50ZH060 REQUIRED CLEARANCE TO COMBUSTIBLE MATL. TOP OF UNIT...0 DUCT SIDE OF UNIT...0 SIDE OPPOSITE DUCTS ...0 BOTTOM OF UNIT ...0 NEC. REQUIRED CLEARANCES. BETWEEN UNITS, POWER ENTRY SIDE ...42.00 [1066.8] UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0] UNIT AND BLOCK OR CONCRETE WALLS AND OTHER GROUNDED SURFACES, POWER ENTRY SIDE...42.00 [1066.8]...

  • Page 6: Install Flanges For Ductwork Connections (50Zh060 Only)

    INSTALL FLANGES FOR DUCTWORK CONNECTIONS (50ZH060 ONLY) The 50ZH060 units are shipped with flanges which must be field-installed on the unit. To install unit flanges: 1. Five pieces of flange are shipped on the return-air opening of the unit. Remove the flanges from the shipping position (See Fig.

  • Page 7: Install Electrical Connections

    Unit removes condensate through a 1 3/64-in. ID hole (using 3/4-in. OD piping or tubing) which is located at the end of the unit. See Fig. 2-4 for location of condensate connection. 19.17 3.92 Fig. 7—Area Not to Be Drilled More Than 3/4-in. Condensate water can be drained directly onto the roof in rooftop installations (where permitted) or onto a gravel apron in ground- level installations.

  • Page 8: Routing Power Leads Into Unit

    UNIT 50ZH OPERATING WEIGHT (lbs) COMPRESSOR TYPE REFRIGERANT Charge (lb) REFRIGERANT METERING DEVICE OUTDOOR COIL Rows...Fins/in. Face Area (sq ft) OUTDOOR-FAN MOTOR CFM Nominal Rpm Motor Hp Diameter (in.) INDOOR COIL Rows...Fins/in. Face Area (sq ft) INDOOR FAN MOTOR Blower Motor Size (in.) Nominal Cfm Rpm Range Number of Speeds...

  • Page 9: Pre-Start-Up

    4. Connect the RED lead to the BLK wire from which the ORG lead was disconnected. Insulate with wirenut from Step 1. 5. Using the wirenut removed from the RED lead, insulate the loose terminal on the ORG lead. 6. Wrap the wirenuts with electrical tape so that the metal terminals cannot be seen.

  • Page 10: Check For Refrigerant Leaks

    Step 3—Refrigerant Charge Refrigerant Charge — Amount of refrigerant charge is listed on unit nameplate and in Table 1. Refer to Carrier Refrigerant Service Techniques Manual, Refrigerants section. Unit panels must be in place when unit is operating during charging procedure. Unit must operate a minimum of 15 minutes before checking charge.

  • Page 11: Heating Mode Charge

    Fig. 15A—Typical Unit Electrical Diagram (208/230–1–60) charts to determine what the suction temperature should be. If suction temperature is high, add refrigerant. If suction temperature is low, carefully recover some of the charge. Recheck the suction pressure as charge is adjusted. Example: (See Fig.

  • Page 12: For 208/230-V

    BRN (COMMON) VIO (STEP 2) WHT ( STEP 1) UNIT POWER WIRING FUSE BLOCK NOTE: Be sure that all supply- and return-air grilles are open, free from obstructions, and adjusted properly. Disconnect electrical power to the unit and install lockout tag before changing blower speed.
  • Page 13 VOLTAGE UNIT 50ZH RANGE SIZE V-PH-HZ (–SERIES, IF USED) 024–311 208/230–1–60 024–321 208/230–1–60 208/230–1–60 208/230–3–6 208/230–1–60 208/230–3–60 460–3–60 208/230–1–60 208/230–3–60 460–3–60 208/230–1–60 208/230–3–60 460–3–60 230–1–60 208/230–3–60 460–3–60 (See legend following Electrical Data charts) Table 3—Electrical Data—50ZH COMPRESSOR ELECTRIC HEAT Nominal KW* 3.8/5.0 11.4 56.0...

  • Page 14: Cooling

    LEGEND — Full Load Amps — Locked Rotor Amps — Minimum Circuit Amps MOCP — Maximum Overcurrent Protection — Rated Load Amps CKT BKR — Circuit Breaker NOTES: 1. In compliance with NEC (National Electrical Code) requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be Power Supply fuse .

  • Page 15: Defrost

    758 110 683 100 SUCTION LINE TEMPERATURE ( SUCTION LINE TEMPERATURE ( Fig. 18—Cooling Charging Chart, 50ZH036 Units 758 110 683 100 SUCTION LINE TEMPERATURE ( SUCTION LINE TEMPERATURE ( Fig. 19—Cooling Charging Chart, 50ZH042 Units supplemental electric heat. When thermostat is satisfied, contacts open, deenergizing contactor and relay;...

  • Page 16: Air Filter

    NOTE TO EQUIPMENT OWNER: Consult your local dealer about the availability of a maintenance contract. The ability to properly perform maintenance on this equip- ment requires certain expertise, mechanical skills, tools and equipment. If you do not possess these, do not attempt to perform any maintenance on this equipment, other than those procedures recommended in the User’s Manual.

  • Page 17: Outdoor Fan

    Table 4—Dry Coil Air Delivery* Horizontal Discharge Unit Motor Speed Watts/CFM Watts Watts Watts High Watts Watts Watts High Watts Watts Watts High Watts Watts 042 † Watts High Watts Watts 048 † Watts High Watts Watts 060 † Watts High †...

  • Page 18: Electrical Controls And Wiring

    Table 5—Wet Coil Pressure Drop UNIT SIZE AIRFLOW 50ZH (CFM) 1000 1200 1000 1200 1400 1600 1000 1200 1400 1600 1400 1600 1800 1700 1800 2100 2300 Table 6—Filter Pressure Drop (in. wg) UNIT FILTER SIZE SIZE 900 1000 1100 1200 1300 1400 50ZH (IN.) 024-042 24 x 24 0.06 0.07 0.08 0.08 0.09 0.09...

  • Page 19: High Flow Valves

    Check Valves Open Closed Open Closed LEGEND Loss of Charge Switch Acutrol Metering Device Check Valve (Arrow indicates direction of flow) 1. Hot gas from compressor flows through the 4-way valve and is directed to the cooling liquid line check valve. It is then condensed and directed through subcooling circuits and out to the strainer and the check valve in the heating liquid line.
  • Page 20 OUTDOOR COIL Check Valves Closed Open Closed Open LEGEND Loss of Charge Switch Acutrol Metering Device Check Valve (Arrow indicates direction of flow) 1. Hot gas from compressor flows through the 4-way valve and is directed to the heating liquid line check valve. It is then con- densed and subcooled through converging circuits.
  • Page 21 80000 70000 60000 50000 40000 30000 20000 10000 Fig. 25–50ZH Balance Point Chart Balance Point Worksheet Outdoor Air Temp (Deg F) C01038...

  • Page 22: Troubleshooting

    Table 8—Troubleshooting—Cooling and Heating SYMPTOM Compressor and outdoor fan will not start. Compressor will not start but outdoor fan runs. Compressor cycles (other than normally satisfying thermostat). Compressor operates continuously. Excessive head pressure. Head pressure too low. Excessive suction pressure. Suction pressure too low.

  • Page 23: Start-Up Checklist

    I. PRELIMINARY INFORMATION Model No ... Serial No ... Date ... Technician ... Customer Information(Name/Address) ... II. PRE-START-UP ____ Verify that all packing materials have been removed from unit ____ Verify that condensate connection is installed per installation instructions ____ Check all electrical connections and terminals for tightness ____ Check wire proximity to refrigerant tubes and sheet metal edges ____ Check that indoor (indoor) air filter is clean and in place ____ Verify that unit installation is level...
  • Page 24 Copyright 2003 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 50zh5si Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 PC 101 Catalog No. 535-00080 Printed in U.S.A.

This manual is also suitable for:

50zh02450zh03050zh03650zh04250zh04850zh060

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