Carrier 50XZ060 User Manual

50XZ 024–060
Single-Packaged Heat Pump Units
with Puron® (R-410A) Refrigerant
Installation, Start-Up,
and Service Instructions
NOTE: Read the entire instruction manual before starting the
installation.
This symbol → indicates a change since the last issue.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS.....................................................2
Introduction ....................................................................................2
Receiving and Installation..............................................................2
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....................................................................3
INSPECTION ......................................................................3
INSTALLATION ................................................................4
Select and Install Ductwork .....................................................5
CONVERTING HORIZONTAL DISCHARGE UNITS TO
DOWNFLOW (VERTICAL) DISCHARGE UNITS.........7
Provide for Condensate Disposal.............................................7
Install Electrical Connections...................................................8
HIGH-VOLTAGE CONNECTIONS..................................8
ROUTING POWER LEADS INTO UNIT ........................9
CONNECTING GROUND LEAD TO GROUND LUG ..9
ROUTING CONTROL POWER WIRES (24-V)..............9
Easy Select™—50XZ .........................................................9
50XZ Sequence Of Operation...........................................17
SPECIAL PROCEDURES FOR 208-V OPERATION ...17
PRE-START-UP ..........................................................................18
START-UP...................................................................................18
50XZ: Start-Up .......................................................................18
Check for Refrigerant Leaks ..................................................19
Start-Up Adjustments..............................................................19
CHECKING COOLING AND HEATING CONTROL OP-
ERATION..........................................................................19
CHECKING AND ADJUSTING REFRIGERANT
CHARGE...........................................................................19
REFRIGERANT CHARGE ..............................................20
NO CHARGE....................................................................20
LOW CHARGE COOLING .............................................20
TO USE COOLING CHARGING CHARTS ..................20
INDOOR AIRFLOW AND AIRFLOW ADJUST-
MENTS..............................................................................20
Defrost Control .......................................................................20
Quiet Shift..........................................................................20
Defrost................................................................................20
MAINTENANCE.........................................................................22
Air Filter..................................................................................23
Indoor Blower and Motor.......................................................23
Outdoor Coil, Indoor Coil, and Condensate Drain Pan ........23
Outdoor Fan ............................................................................24
Electrical Controls and Wiring...............................................24
Refrigerant Circuit ..................................................................24
Indoor Airflow ........................................................................24
Metering Devices–TXV & Accurater Piston.........................24
Pressure Switches....................................................................25
Loss of Charge Switch ...........................................................25
High-Pressure Switch..............................................................25
Copeland Scroll Compressor (Puron Refrigerant).................26
Refrigerant System..................................................................26
Refrigerant .........................................................................26
Compressor Oil..................................................................26
Servicing Systems on Roofs with Synthetic Materials....26
Liquid Line Filter Drier ....................................................26
Puron (R-410A) Refrigerant Charging .............................26
System Information.................................................................26
Loss of Charge Switch......................................................26
Check Defrost Thermostat ................................................26
TROUBLESHOOTING ...............................................................27
Start-Up Checklist........................................................................27
NOTE TO INSTALLER — READ THESE INSTRUCTIONS
CAREFULLY AND COMPLETELY before installing this unit.
Also, make sure the Owner’s Manual and Service Instructions are
left with the unit after installation.
Fig. 1—Unit 50XZ
C99064
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 5a 5a
PC101CatalogNo.535–00114 PrintedinU.S.A.Form50XZ-2SIPg18–03Replaces:50XZ-1SI

Carrier 50XZ060 Specifications

General

Brand	Carrier
Model	50XZ060
Category	Heat Pump
Language	English

Summary

Safety Considerations

Introduction

Overview of the 50XZ heat pump unit and its intended application.

General Safety Warnings

Key safety warnings, hazards, and precautions for installation and servicing.

Electrical Safety and Requirements

Guidelines for electrical connections, power supply, and compliance with codes.

Puron System Safety

Specific safety precautions for systems using Puron (R-410A) refrigerant and POE oil.

Receiving and Installation

Unit Identification and Inspection

Procedures for identifying the unit model and inspecting for shipping damage.

Unit Support and Clearances

Instructions for proper unit support and maintaining required ventilation clearances.

Rigging and Placement

Detailed steps for safely rigging and positioning the unit during installation.

Installation Procedures

Ductwork and Condensate Disposal

Guidelines for duct system installation and condensate water disposal methods.

Electrical Connections

Instructions for making all high-voltage and low-voltage electrical connections.

System Configuration

Using Easy Select™ taps to configure unit operation based on system components.

Start-Up and Operation

Pre-Start-Up Checks

Essential inspections and preparations required before the unit's initial start-up.

Operational Checks

Verifying proper function of cooling, heating, and defrost controls during operation.

Refrigerant Charge and Leaks

Procedures for checking refrigerant charge, leaks, and system pressure.

Indoor Airflow and Adjustments

Guidelines for checking and adjusting indoor airflow for optimal performance.

Defrost Control Configuration

Understanding and configuring the unit's defrost control modes, including Quiet Shift.

Maintenance and Troubleshooting

Routine Maintenance Tasks

Recommended tasks for maintaining unit performance, including filter, blower, and coil cleaning.

Troubleshooting Guide

A comprehensive chart for diagnosing and resolving common unit operational issues.