Allied 4HP18V36P-50 - User Manual

508206-01 Issue 2140 Page 1 of 83
SERVICE MANUAL
4HP18V
(P) 508206-01
*P508206-01*
Table of Contents
Technical Specications ..............................................2
Parts Arrangement.......................................................5
General ........................................................................8
Installation ...................................................................8
Refrigerant Piping ......................................................10
Electrical - Circuit Sizing and Wire Routing ...............19
Thermostat Control and Low Voltage Control Wiring 19
Outdoor Unitary Control.............................................23
Unit Operation ...........................................................25
Servicing Units Delivered Void of Charge..................29
Unit Start-Up ..............................................................29
System Operation and Service ..................................30
Conguring Unit .........................................................45
Maintenance ..............................................................46
Homeowner Information ............................................46
Wiring Diagram ..........................................................48
Unit Sequence of Operation ......................................49
Component Testing ....................................................53
This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to
the potential for personal injury or death.
Electric shock hazard.
Can cause injury or death. Before attempting
to perform any service or maintenance,
turn the electrical power to unit OFF at
disconnect switch(es). Unit may have
multiple power supplies.
WARNING
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves
and protective clothing.
CAUTION
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer (or
equivalent), service agency or the gas supplier.
WARNING

Summary

Technical Specifications

Electrical and Physical Data

Details unit electrical ratings, current limits, and physical dimensions for various models.

Unit Dimensions

Provides specific measurements for unit width, depth, and height in inches.

Refrigeration Data

Refrigerant Charge and Line Size

Specifies refrigerant charge, TXV type, and line set connections for different models.

Control Panel Parts Arrangement

Installation Site Selection

General Installation Guidance

Provides essential safety precautions and general information before installation.

Unit Mounting and Clearances

Refrigerant Piping Installation

Line Set Flushing Procedure

Refrigerant Piping Brazing Procedures

Leak Test Procedure

System Evacuation Procedure

Electrical Wiring and Safety

Electrical Safety Warnings

Highlights critical safety warnings for shock, fire, and ESD during electrical work.

Thermostat Control Options

Thermostat Wiring Diagrams

Outdoor Unitary Control Setup

Heating Operation Modes and Defrost Function

Defrost Cycle Details

Explains frost accumulation, defrost timing, and termination temperature settings.

Unit Start-Up Procedures

Alert Code Troubleshooting

Configuring Unit Selection Code

Regular Maintenance Requirements

Maintenance Safety Precautions

Highlights critical safety warnings for electrical hazards and sharp edges during maintenance.

Heat Pump Operation and System Controls

Wiring Diagram

Unit Sequence of Operation

Component Testing Overview

Pressure Switch Testing

Explains how to test the functionality of high and low pressure switches.

Compressor Checkout and Error Codes

HFC-410 A Charging Information

Refrigerant Charging Procedures

Provides comprehensive charging procedures, pressure tables, and indoor unit matchups.

Allied 4HP18V36P-50 Specifications

General

Brand	Allied
Model	4HP18V36P-50
Category	Heat Pump
Language	English