Carrier Performance 50VR-A

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50VR---A and 50VR---C

Performancet 15 SEER 2---Stage Packaged Heat Pump

System with Puron (R---410A) Refrigerant

Single and Three Phase

2 --- 5 N o m i n a l To n s ( S i z e s 2 4 --- 6 0 )

Installation Instructions

IMPORTANT: Effective January 1, 2015, all split system and

packaged air conditioners must be installed pursuant to applicable

regional efficiency standards issued by the Department of Energy.

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 1.........................

INTRODUCTION 2...................................

RECEIVING AND INSTALLATION 2--10.................

Check Equipment 2..................................

Identify Unit 2....................................

Inspect Shipment 2.................................

Provide Unit Support 2...............................

Roof Curb 2......................................

Slab Mount 2.....................................

Provide Clearances 6.................................

Field Fabricate Ductwork 6............................

Rig and Place Unit 6.................................

Inspection 7......................................

Rigging/Lifting of Unit 7............................

Connect Condensate Drain 7...........................

Install Duct Connections 7.............................

Configuring Units for Downflow (Vertical) Discharge 8....

Install Electrical Connections 8.........................

High--Voltage Connections 9.........................

Special Procedures for 208v Operation 9................

Control Voltage Connections 9........................

Standard Connection 9..............................

Transformer Protection 9............................

PRE --START--UP 11...................................

START--UP 11--13.....................................

Check Cooling and Heating Control Operation 11..........

Check for Refrigerant Leaks 11.........................

Start--Up Adjustments 12..............................

Checking and Adjusting Refrigerant Charge 12...........

Indoor Airflow and Airflow Adjustments 12.............

Low Stage Cooling 13..............................

High Stage Cooling 13..............................

High Stage Enhanced Dehumidification Cooling (208/230 Vac

Models) 13.......................................

Continuous Fan 13.................................

Sequence of Operation 13...........................

Defrost Control 13...................................

Quiet Shift 13.....................................

Defrost 13.......................................

MAINTENANCE 32--35................................

Air Filter 32......................................

Indoor Blower and Motor 32.........................

Outdoor Coil, Indoor Coil, and Condensate Drain Pan 33...

Outdoor Fan 33...................................

A09033

Fig. 1 -- Unit 50VR

Electrical Controls and Wiring 33.....................

Refrigerant Circuit 34...............................

Evaporator Airflow 34..............................

Metering Device 34................................

System Information 35..............................

Loss of Charge Switch 35............................

Check Defrost Thermostat 35.........................

TROUBLESHOOTING 35..............................

START--UP CHECKLIST 35............................

SAFETY CONSIDERATIONS

Improper installation adjustment, alteration, service, maintenance,

or use can cause explosion, fire, electrical shock, or other

conditions which may cause death, personal injury, or property

damage. Consult a qualified installer, service agency, or your

distributor or branch for information or assistance. The qualified

installer or agency must use factory--authorized kits or accessories

when modifying this product Refer to the individual instructions

packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses, protective clothing,

and work gloves. Use quenching cloth for brazing operations.

Have a fire extinguisher available. Read these instructions

thoroughly and follow all warnings or cautions included in

literature and attached to the unit. Consult local building codes, the

current editions of the National Electrical Code (NEC) NFPA 70.

In Canada refer to the current editions of the Canadian electrical

Code CSA C22.1.

Recognize safety information. This is the safety--alert symbol

When you see this symbol on the unit and in instructions or

manuals, be alert to the potential for personal injury. Understand

these signal words; DANGER, WARNING, and CAUTION. These

words are used with the safety--alert symbol. DANGER identifies

the most serious hazards which will result in severe personal injury

or death. WARNING signifies hazards which could result in

personal injury or death. CAUTION is used to identify unsafe

practices which may result in minor personal injury or product and

property damage. NOTE is used to highlight suggestions which

will result in enhanced installation, reliability, or operation.

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Summary

Safety Considerations

General Safety Warnings

General warnings about improper installation, alteration, service, or use.

Introduction and Receiving

Unit Introduction

Describes the unit as a self-contained, outdoor-installed packaged heat pump.

Equipment Receiving and Inspection

Verifies unit model, serial number, and checks for shipping damage.

Unit Support and Placement

Curb and Slab Mounting

Guidelines for securing the unit to a curb or slab for stable installation.

Installation Procedures

Clearances and Rigging

Ensuring adequate clearances and safe rigging/inspection practices for unit placement.

Ductwork and Drain Connections

Installing ductwork and condensate drain connections according to specifications.

Electrical Connections

Downflow Configuration and Electrical Setup

Configuring units for downflow discharge and installing electrical connections.

High-Voltage, Control, and Special Wiring

Making high-voltage, control, and special voltage/transformer wiring connections.

Start-Up Procedures

Pre-Start-Up Inspections

Steps to inspect the unit and its components before initial start-up.

Control Operation and Refrigerant Checks

Verifying system controls and checking for refrigerant leaks.

Start-Up Adjustments

Procedures for adjusting refrigerant charge and airflow for proper operation.

System Operation and Controls

Sequence of Operation

Detailed explanation of the unit's operating sequences for various modes.

Defrost Control Features

Managing defrost cycles, including quiet shift and automatic defrost initiation.

Maintenance Procedures

Maintenance Safety Warnings

Important safety warnings and cautions for performing maintenance tasks.

Air Filter and Blower Servicing

Instructions for inspecting, cleaning, or replacing air filters and servicing the blower.

Coil, Drain Pan, and Fan Cleaning

Cleaning outdoor/indoor coils, drain pan, and ensuring the outdoor fan is clear.

Electrical Controls and Wiring Inspection

Annual inspection of electrical controls and wiring for tightness and condition.

System Information and Troubleshooting

Refrigerant Circuit and Safety

Understanding the refrigerant circuit and associated safety hazards.

Component Information and Checks

Details on airflow, metering devices, switches, oil, filter driers, and refrigerant charging.

Defrost Thermostat and Troubleshooting

Checking the defrost thermostat and referring to the troubleshooting chart.

Start-Up Checklist

Preliminary Information

Fields for basic unit and technician information.

Pre-Start-Up Checklist Items

Checklist items to verify before initial unit start-up.

Start-Up Checks

Checklist items for electrical, temperatures, and pressures during start-up.