Carrier 50ZH024-060- Manual

Carrier 50ZH024-060

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Table of Contents:

  • Page 3 – lb; REQUIRED CLEARANCE FOR OPERATION AND SERVICING; REQUIRED CLEARANCE TO COMBUSTIBLE MATL.
  • Page 6 – Step 6—Provide for Condensate Disposal; Fig. 5—Shipping Location of Duct Flanges; HAND FORM
  • Page 7 – Step 7—Install Electrical Connections; Fig. 8—Typical installation; SIZE
  • Page 10 – Fig. 13—Line Power Connections
  • Page 11 – HEATING MODE CHARGE; Step 4—Indoor Airflow and Airflow Adjustments; For cooling operation, the recommended airflow is 350 to
  • Page 12 – Fig. 15B—Accessory Electric Heater Wiring; orange = medium speed
  • Page 13 – Table 3—Electrical Data—50ZH
  • Page 14 – SUCTION LINE TEMPERATURE (; SUCTION LINE PRESSURE (KILOP
  • Page 15 – MAINTENANCE
  • Page 17 – Step 5—Outdoor Fan; Shut off unit power supply and install lockout tag.; Table 4—Dry Coil Air Delivery* Horizontal Discharge; Unit
  • Page 18 – Table 5—Wet Coil Pressure Drop; UNIT SIZE; Table 7—Accessory Electric Heat Pressure Drop; HEATER KW
  • Page 19 – Step 12—High Flow Valves; Fig. 23–Typical Heat Pump Operation, Heating Mode
  • Page 20 – Fig. 24–Typical Heat Pump Operation, Cooling Mode
  • Page 21 – Fig. 25–50ZH Balance Point Chart; Balance Point Worksheet; Building Heat Loss, BTUH
  • Page 22 – Table 8—Troubleshooting—Cooling and Heating
  • Page 23 – *Measured at suction inlet to compressor
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50ZH024-060

Packaged Heat Pump Units

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

INSTALL FLANGES FOR DUCTWORK CONNEC-
TIONS (50ZH060 ONLY) ..................................................6
CONVERTING HORIZONTAL DISCHARGE UNITS TO
DOWNFLOW (VERTICAL) DISCHARGE ......................6

Provide for Condensate Disposal .............................................6
Install Electrical Connections ...................................................7

HIGH-VOLTAGE CONNECTIONS ..................................7
ROUTING POWER LEADS INTO UNIT ........................8
CONNECTING

GROUND

LEAD

TO

UNIT

GROUND ............................................................................8
ROUTING CONTROL POWER WIRES ..........................8
ACCESSORY ELECTRIC HEAT WIRING .....................8
SPECIAL PROCEDURES FOR 208-V OPERATION .....8

PRE-START-UP ............................................................................9

START-UP .....................................................................................9

Check for Refrigerant Leaks ..................................................10

LOCATE AND REPAIR REFRIGERANT LEAKS AND
CHARGE THE UNIT AS FOLLOWS: ...........................10

Start-Up Cooling Section and Make Adjustments ................10

CHECKING COOLING CONTROL OPERATION .......10
COMPRESSOR ROTATION ...........................................10

Refrigerant Charge ..................................................................10

NO CHARGE ....................................................................10
LOW CHARGE COOLING .............................................10
TO USE THE COOLING CHARGING CHART............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

DEFROST ..........................................................................15
ELECTRIC RESISTANCE HEATING ............................15

MAINTENANCE .........................................................................15

Air Filter..................................................................................16
Unit Top Removal (Outdoor-Coil Side) ................................16
Indoor Blower and Motor.......................................................16
Outdoor Coil, Indoor Coil, and Condensate Drain Pan ........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.

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

Fig. 1—Unit 50ZH

C00155

Visit www.carrier.com

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 1

4

Tab

6 8

PC 101

Catalog No. 535-00080

Printed in U.S.A.

Form 50ZH-5SI

Pg 1

7-03

Replaces: 50ZH-4SI

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Other Manuals for Carrier 50ZH024-060

Summary

Page 3 - lb; REQUIRED CLEARANCE FOR OPERATION AND SERVICING; REQUIRED CLEARANCE TO COMBUSTIBLE MATL.

Fig. 2—Unit Base Dimensions, 50ZH024-030 UNIT ELECTRICAL CHARACTERISTICS UNIT WEIGHT CENTER OF GRAVITY IN. (MM) lb kg X Y Z 50ZH024 208/230-1-60 232 106 14.0 (356) 19.0 (483) 12.0 (305) 50ZH030 208/230-1-60, 208/230–3–60 254 116 14.0 (356) 19.0 (483) 12.0 (305) C00156 REQUIRED CLEARANCE FOR OPERATIO...

Page 6 - Step 6—Provide for Condensate Disposal; Fig. 5—Shipping Location of Duct Flanges; HAND FORM

INSTALL FLANGES FOR DUCTWORK CONNECTIONS(50ZH060 ONLY) The 50ZH060 units are shipped with flanges which must befield-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 (SeeFig. 5). ...

Page 7 - Step 7—Install Electrical Connections; Fig. 8—Typical installation; SIZE

Unit removes condensate through a 1 3/64-in. ID hole (using3/4-in. OD piping or tubing) which is located at the end of the unit.See Fig. 2-4 for location of condensate connection. Condensate water can be drained directly onto the roof in rooftopinstallations (where permitted) or onto a gravel apron ...

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