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50ZH030-060

3-Phase Packaged Heat Pump

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) ..................................................2

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 ........................7

CONNECTING GROUND LEAD TO UNIT GROUND .7

ROUTING CONTROL POWER WIRES ..........................7

ACCESSORY ELECTRIC HEAT WIRING .....................7

SPECIAL PROCEDURES FOR 208-V OPERATION .....7

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

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

Check for Refrigerant Leaks ....................................................9

LOCATE AND REPAIR REFRIGERANT LEAKS AND

CHARGE THE UNIT AS FOLLOWS: .............................9

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............11

HEATING MODE CHARGE...........................................11

Indoor Airflow and Airflow Adjustments..............................11

FOR 208/230-V .................................................................11

FOR 460-V MOTORS ......................................................11

Unit Controls...........................................................................11

HIGH-PRESSURE RELIEF VALVE...............................11

LOSS OF CHARGE SWITCH.........................................11

COMPRESSOR OVERLOAD..........................................11

Sequence of Operation............................................................14

FAN OPERATION............................................................14

COOLING..........................................................................14

HEAT PUMP HEATING..................................................14

DEFROST..........................................................................14

ELECTRIC RESISTANCE HEATING............................14

MAINTENANCE.........................................................................14

Air Filter..................................................................................16

Unit Top Removal (Outdoor-Coil Side) ................................16

Indoor Blower and Motor.......................................................16

Outdoor Coil, Indoor Coil, and Condensate Drain Pan ........17

Outdoor Fan ............................................................................19

Electrical Controls and Wiring...............................................19

Refrigerant Circuit ..................................................................19

Indoor Airflow ........................................................................19

Metering Devices ....................................................................19

Lubrication ..............................................................................19

Liquid Line Strainer................................................................19

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

equipment, pay attention to precautions in the literature, tags, and

labels attached to the unit, and other safety precautions that may

apply.

Fig. 1—Unit 50ZH

C00155

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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 Printed in U.S.A. Catalog No. 50ZH-6SI Pg 1 2-06 Replaces: New

1 2 3 4 5 6 ... 23 24

Inhaltsverzeichnis

Seite 1 - 3-Phase Packaged Heat Pump

50ZH030-0603-Phase Packaged Heat PumpInstallation, Start-Up and Service InstructionsNOTE: Read the entire instruction manual before starting theinstal

Seite 2

Step 2—Start-Up Cooling Section and Make AdjustmentsComplete the required procedures given in the Pre-Start- Upsection this page before starting the u

Seite 3 - NEC. REQUIRED CLEARANCES

TO USE THE COOLING CHARGING CHARTThis method is to be used in cooling mode only. Take the outdoorambient temperature and read the suction pressure gau

Seite 4

Fig. 15—208/230-3-60 Wiring DiagramA0605512

Seite 5 - Lb Kg X Y Z

Fig. 16—460-3-60 Wiring DiagramA0605613

Seite 6 - (Size 060 Only)

Step 6—Sequence of OperationFAN OPERATIONThe FAN switch on the thermostat controls indoor fan operation.When the FAN switch is placed in the ON positi

Seite 7 - 19.17″ 3.92″

Table 3—Electrical Data—50ZHUNIT 50ZHSIZE(–SERIES, IFUSED)V-PH-HZVOLTAGERANGECOMPRESSOROFMFLAIFMFLAELECTRIC HEAT SINGLE POINT POWER SUPPLYMIN MAX RLA

Seite 8 - Table 1 — Physical Data

The ability to properly perform maintenance on this equip-ment requires certain expertise, mechanical skills, tools andequipment. If you do not posses

Seite 9 - 750 900 1050 1200 1500

a. Lift wheel from housing. When handling and/or cleaningblower wheel, be sure not to disturb balance weights (clips)on blower wheel vanes.b. Remove c

Seite 10 - Fig. 12—Control Box Wiring

insulation, wiring or air filter(s). For best results, spray outdoor-coil fins from inside to outside the unit. On units with an outer andinner outdoo

Seite 11 - Fig. 14—Control Connections

or air filter(s). If the drain tube is restricted, clear it with a‘‘plumbers snake’’ or similar probe device. Ensure that theauxiliary drain port abov

Seite 12

Follow all safety codes. Wear safety glasses and work gloves. Usequenching cloth for unbrazing operations. Have fire extinguisheravailable for all bra

Seite 13

Fig. 25–Typical Heat Pump Operation, Heating ModeC95045STRAINERACCUMULATORCOMPRESSORSTRAINERLCSOUTDOOR COILINDOOR COILABDCCheck ValvesAOpenBClosedCOpe

Seite 14

Fig. 26–Typical Heat Pump Operation, Cooling ModeC95044STRAINERACCUMULATORCOMPRESSORSTRAINERLCSOUTDOOR COILINDOOR COILABDCCheck ValvesAClosedBOpenCClo

Seite 15 - Table 3—Electrical Data—50ZH

Table 8—Troubleshooting—Cooling and HeatingSYMPTOM CAUSE REMEDYCompressor and outdoor fan will not start.Power Failure Call power companyLoss of Charg

Seite 16 - OUTDOOR TEMP

START-UP CHECKLIST(REMOVE AND STORE IN JOB FILE)I. PRELIMINARY INFORMATIONModel No ...

Seite 17

Seite 18

Fig. 2—Unit Base Dimensions—50ZH030UNIT ELECTRICAL CHARACTERISTICSUNIT WEIGHT CENTER OF GRAVITY IN. (MM)lb kg X Y Z50ZH030 208/230–3–60 254 116 14.0 (

Seite 19 - 0.708in

Fig. 3—Unit Base Dimensions—50ZH036–048UNIT ELECTRICAL CHARACTERISTICSUNIT WEIGHT CENTER OF GRAVITY IN. (MM)Lb Kg X Y Z50ZH036208/230-3-60,460–3–60277

Seite 20 - Check Valves

Fig. 4—Unit Base Dimensions—50ZH060UNIT ELECTRICAL CHARACTERISTICSUNIT WEIGHT CENTER OF GRAVITY IN. (MM)Lb Kg X Y Z50ZH060 208/230-3-60, 460-3-60 368

Seite 21 - Balance Point Worksheet

1. Five pieces of flange are shipped on the return-air opening ofthe unit. Remove the flanges from the shipping position (SeeFig. 5). Screws are field

Seite 22

CPVC, or 3/4-in. copper pipe (all field supplied). Do not undersizethe tube. Pitch the drain tube downward at a slope of at least 1 in.for every 10 ft

Seite 23 - START-UP CHECKLIST

Table 1 — Physical DataUNIT 50ZH 030 036 042 048 060OPERATING WEIGHT (lbs) 254 277 295 328 368COMPRESSOR TYPE ScrollREFRIGERANT Charge (lb)R-225.8 5.9

Seite 24 - Book 1 4

PRE-START-UPFailure to observe the following warnings could result inserious injury or death:1. Follow recognized safety practices and wear protective