Carrier 50CR installation instructions Installation Instructions, Table of Contents

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50CR

Infinityt Single-Packaged Heat Pump Units With Puron→ (R-410A) Refrigerant

Sizes 024-060

Installation Instructions

NOTE: Read the entire instruction manual before starting the installation.

NOTE: Installer: Make sure the Owner’s Manual and Service Instructions are left with the unit after installation.

TABLE OF CONTENTS

 

 

Page

SAFETY CONSIDERATIONS

. . . . . . 2

INTRODUCTION

. . . . . . 2

RECEIVING AND INSTALLATION

. . . 2-16

Check Equipment

. . . . . . 2

Identify Unit

. . . . . . 2

Inspect Shipment

. . . . . . 2

Provide Unit Support

. . . . . . 2

Roof Curb

. . . . . . 2

Slab Mount

. . . . . . 2

Ground Mount

. . . . . . 2

Provide Clearances

. . . . . . 2

Rig and Place Unit

. . . . . . 7

Inspection

. . . . . . 7

Introduction

. . . . . . 7

Use of Rigging Bracket

. . . . . . 7

Select and Install Ductwork

. . . . . . 9

Converting Horizontal Discharge Units to Downflow

(Vertical) Discharge Units

. . . . . . 9

Provide for Condensate Disposal

. . . . . . 9

Install Electrical Connections

. . . . . 11

High-Voltage Connections

. . . . . 11

Routing Power Leads Into Unit

. . . . . 11

Connecting Ground Lead to Ground Screw

. . . . . 11

Routing Control Wires

. . . . . 11

Accessory Installation

. . . . . 16

Special Procedures for 208-v Operation

. . . . . 16

PRE-START-UP

. . . . . 17

START-UP

. . . . . 17

Unit Start-Up

. . 17-23

Sequence of Operation

. . . . . 20

Check for Refrigerant Leaks

. . . . . 20

Start-Up Adjustments

. . . . . 20

Checking Cooling and Heating Control Operation

. . . . . 20

Checking and Adjusting Refrigerant Charge

. . . . . 22

Refrigerant Charge

. . . . . 22

No Charge

. . . . . 22

Low Charge Cooling

. . . . . 22

To Use Cooling Charging Charts

. . . . . 22

Indoor Airflow and Airflow Adjustments

. . . . . 22

Defrost Control

. . . . . 22

Quiet Shift

. . . . . 22

Defrost

. . . . . 22

Emergency Heat/Cool Mode

. . . . . 22

A05307

Fig. 1 - Unit 50CR

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-28 Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Indoor Blower and Motor . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Outdoor Coil, Indoor Coil, and Condensate Drain Pan . . . . 25 Outdoor Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Electrical Controls and Wiring . . . . . . . . . . . . . . . . . . . . . . 26 Refrigerant Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Indoor Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Metering Devices–TXV & AccuRater→ Piston . . . . . . . . . . 26 Pressure Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Loss-of-Charge Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 High-Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Copeland Scroll Compressor (Puron→ Refrigerant) . . . . . . . 27 Refrigerant System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Compressor Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Servicing Systems on Roofs with Synthetic Materials . . . 27 Liquid-Line Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . 28 Puron (R-410A) Refrigerant Charging . . . . . . . . . . . . . . 28

System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Loss-of-Charge Switch . . . . . . . . . . . . . . . . . . . . . . . . . 28 Check Defrost Thermostat . . . . . . . . . . . . . . . . . . . . . . . . 28 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

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Contents Table of Contents Installation InstructionsElectrical Shock Hazard Safety ConsiderationsEquipment Damage Hazard IntroductionRoof Curb for Small Cabinet Roof Curb for Large Cabinet Unit Leveling Tolerances 50CR024-036 Unit Dimensions 50CR042-060 Unit Dimensions Inspection Rig and Place UnitUnit Falling Hazard Property Damage HazardRigging Bracket Under Unit Rain Lip Electrical Operation Hazard Select and Install DuctworkProvide for Condensate Disposal Physical Data Unit 50CR Typical InstallationConnecting Ground Lead to Ground Screw Routing Power Leads Into UnitRouting Control Power Wires HIGH-VOLTAGE ConnectionsElectrical Data-50CR Electrical Data Legend Wiring Schematics-50CR Single Phase Wiring Schematics-50CR Three Phase Line Power Connections Accessory InstallationSTART-UP PRE-START-UP FIRE, EXPLOSION, Electrical Shock HazardUnit Start-Up Status Code 37, Heater Output Sensed on When not Energized Status Code 45, Control Board Test FaultStatus Code 44, Motor Communication Fault Verify Motor Winding SectionStatus Code 41, Blower Motor Fault Status Code 36, Heater Output not Sensed When EnergizedStatus Code 16, System Communication Fault Status Code 25, Invalid Motor / Model SelectionSequence of Operation Start-Up AdjustmentsCheck for Refrigerant Leaks Typical Heat Pump Operation, Cooling Mode Defrost Control Electric Heat Pressure Drop Table Small Cabinet Personal Injury and Unit Damage Hazard MaintenanceUnit Operation Hazard Indoor Blower and Motor Air FilterOutdoor Coil, Indoor Coil, and Condensate Drain Pan Outdoor FanIndoor Airflow Pressure SwitchesMetering Devices-TXV & Accurater Piston EXPLOSION, FIRE, Electrical Shock Hazard High-Pressure SwitchPersonal INJURY, Unit Operation Hazard Troubleshooting LOSS-OF-CHARGE SwitchSTART-UP Checklist System InformationObserve all warnings, cautions, and bold text Troubleshooting Chart Head pressure too low Troubleshooting Chart Cont’dSTART-UP Checklist
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