Whirlpool W4GH8 User Manual

HEAT PUMP INSTALLATION INSTRUCTIONS
HEAT PUMP SAFETY
INSTALLATION REQUIREMENTS
These instructions are intended as a general guide only for use by
qualified persons and do not supersede any national or local
codes in any way. The installation must comply with all state and
local codes as well as the National Electrical Code.
■ The heat pump is designed and approved for outdoor use
only.
■ The heat pump must be installed with no ductwork in the
airstream. The outdoor fan is not designed to operate against
any additional static pressure.
Table of Contents
HEAT PUMP SAFETY.....................................................................1
INSTALLATION REQUIREMENTS................................................1
Tools and Parts ............................................................................2
System Requirements..................................................................2
Location Requirements................................................................2
Electrical Requirements ...............................................................4
INSTALLATION INSTRUCTIONS..................................................4
Inspect Shipment .........................................................................4
Flush Refrigerant Lines ................................................................5
Connect Refrigerant Lines ...........................................................6
Charge Refrigerant Lines .............................................................8
Make Electrical Connections .....................................................10
Complete Installation .................................................................12
SEQUENCE OF OPERATION ......................................................13
Cooling Cycle .............................................................................13
Heating Cycle .............................................................................13
Defrost Cycle..............................................................................13
Adjust Defrost System ...............................................................14
Troubleshoot the Defrost System..............................................15
TROUBLESHOOTING ..................................................................15
System Diagnostic Module ........................................................15
SYSTEM MAINTENANCE ............................................................17
ASSISTANCE OR SERVICE.........................................................17
Accessories ................................................................................17
WARRANTY ..................................................................................18
Whirlpool Gold
®
Model W4GH8
48656D008
You can be killed or seriously injured if you don't immediately
You
can be killed or seriously injured if you don't
follow
All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury, and tell you what can
happen if the instructions are not followed.
Your safety and the safety of others are very important.
We have provided many important safety messages in this manual and on your appliance. Always read and obey all safety
messages.
This is the safety alert symbol.
This symbol alerts you to potential hazards that can kill or hurt you and others.
All safety messages will follow the safety alert symbol and either the word “DANGER” or “WARNING.”
These words mean:
follow instructions.
instructions.
DANGER
WARNING

Whirlpool W4GH8 Specifications

General

Brand	Whirlpool
Model	W4GH8
Category	Heat Pump
Language	English

Summary

Heat Pump Safety

Installation Requirements

Tools and Parts

Gather required tools and parts before starting installation.

System Requirements

Ensures proper operation and efficient performance of matched systems.

Location Requirements

Guidelines for placing the heat pump outdoors with adequate clearance and access.

Electrical Requirements

Details field wiring, disconnect means, and over-current protection for the heat pump.

Minimum Clearances

Transition from Horizontal to Vertical

Line Set Isolation

Installing Horizontal Runs

Shows how to install line sets on horizontal runs.

Installing Vertical Runs

Illustrates how to install line sets on vertical runs.

Installation Instructions

Inspect Shipment

Check the heat pump for specifications and shipping damage upon receipt.

Flush Refrigerant Lines

Detailed procedure for flushing refrigerant lines, critical for R-22 to R-410A conversion.

Connect Refrigerant Lines

Procedures for connecting refrigerant lines, including TXV installation and brazing.

Charge Refrigerant Lines

Methods for charging refrigerant based on system type and ambient temperature.

Make Electrical Connections

Instructions for making safe and compliant electrical connections for the heat pump.

Complete Installation

Final steps to operate and verify the heat pump's functionality after installation.

Sequence of Operation

Cooling Cycle

Describes how the system operates during a cooling demand.

Heating Cycle

Describes how the system operates during a heating demand.

Defrost Cycle

Explains the automatic defrost cycle for removing frost from the outdoor coil.

Defrost Thermostat

Explains the function and location of the defrost thermostat.

Compressor Delay

Explains the compressor delay function for reducing sounds during defrost mode.

Time Delay

Explains the 5-minute time delay to protect the compressor from short cycling.

Defrost Control

Pressure Switch Circuit

Describes the pressure switch circuit connections for optional safety switches.

Defrost Control Board Diagnostic LEDs

Explains the diagnostic LEDs on the defrost control board and their meanings.

Adjust Time Between Defrost Cycles

How to adjust the time intervals between defrost cycles.

Troubleshoot the Defrost System

Troubleshooting

System Diagnostic Module

Explains the diagnostic module and its role in identifying system failures via LED codes.

Flash Codes

Lists diagnostic flash codes for the system diagnostic module and their troubleshooting information.

24 VAC Power Wiring

Details the requirement for a constant 24 VAC power supply to the diagnostic module.

Thermostat Demand Wiring

Explains the thermostat demand signal input requirement for the diagnostic module.

Incorrectly Wired Module Troubleshooting

Provides troubleshooting for incorrectly wired diagnostic modules and false LED codes.

System Maintenance

Assistance or Service

Limited Warranty

Covered Equipment

Lists the specific Whirlpool cooling and heating equipment covered by the warranty.

Five (5) Year Coverage-Residential Applications

Details the 5-year warranty for residential applications and what it covers.

One (1) Year Coverage-Non-Residential Applications

Details the 1-year warranty for non-residential applications.

Extended Coverage

Outlines extended warranty coverage for specific components like heat exchangers and compressors.

Excluded Components

Lists components and parts not covered by the warranty.

Repairs

Specifies requirements for authorized service parts and labor for repairs.

Care of Equipment

Emphasizes the importance of proper installation, operation, and maintenance to avoid voiding the warranty.

Warranty Procedure

Outlines the steps to follow when warranty parts are required.

Warranty Limitations

Details conditions that void the warranty and limitations on liability.