Allied 4SCU16LE136P-50

To Next Page

508219-01 Issue 2132 Page 1 of 43

SERVICE MANUAL

4SCU16LE/14LB

(P) 508219-01

*P508219-01*

Table of Contents

Technical Specications - 4SCU16LE .........................2

Technical Specications - 4SCU14LB .........................5

Technical Specications - 4SCU14LE-7 ......................8

Technical Specications - 4SCU14LB-7 ....................10

Technical Specications - 4SCU14LE-4 ....................12

Refrigerant Metering Device - Indoor Coil .................16

Installation .................................................................16

Refrigeration Piping ...................................................19

Electrical Wiring .........................................................28

Sequence of Operation..............................................32

Start-Up .....................................................................32

Maintenance ..............................................................33

Wiring Diagram ..........................................................34

Servicing Units Void of Charge ..................................38

System Refrigerant ....................................................38

Charge Labels ...........................................................41

Start-Up and Performance Checklist .........................43

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

Main Page

Need help?

Do you have a question about the Allied 4SCU16LE136P-50 and is the answer not in the manual?

Summary

Safety Information

General Safety Alert Symbol

Alerts users to potential personal injury or death.

Electrical Shock Hazard Warning

Warns of electric shock danger and required precautions.

Handling Precautions

Advises caution for sharp sheet metal edges and protective clothing.

Technical Specifications - 4 SCU16 LE

Refrigeration Data

Technical Specifications - 4 SCU14 LB

Refrigeration Data - 4 SCU14 LB

Refrigerant Connection and Expansion Device

Specifies refrigerant line sizes and expansion device types.

Technical Specifications - 4 SCU14 LE-7

Technical Specifications - 4 SCU14 LB-7

Technical Specifications - 4 SCU14 LE-4

Physical and Electrical Data

Refrigerant Metering Device and Installation

Refrigerant Metering Device - Indoor Coil

Specifies orifice sizes for indoor expansion devices.

Installation Guidelines

Torque and Service Valve Procedures

Torque Requirements

Using Manifold Gauge Set

Explains how to use a manifold gauge set for system checks.

Operating Service Valves

Details how to open and close liquid/suction line service valves.

Refrigeration Piping

Piping Guidelines

Service Valve Operation

Explains the function and operation of ball-type service valves.

Line Set and System Conversion

Filter Drier Importance

R-22 to R-410 A Conversion

Outlines procedures for converting existing R-22 systems to R-410A.

Flushing Line Sets

Describes the process for flushing line sets in converted systems.

Indoor Expansion Valve Installation

Expansion Valve Mounting

Details the installation process for the expansion valve.

Sensing Bulb Placement

Equalizer Line Connection

Refrigerant Piping - Brazing Procedures

Attach Manifold Gauge Set

Describes connecting the gauge set for brazing preparation.

Safety Warnings

Warns about hazards associated with brazing materials and procedures.

Brazing Procedures and Protection

Wrap Service Valves

Advises on wrapping valves to protect seals during brazing.

Braze Line Set

Leak Test and Evacuation

Test for Leaks

Procedures for checking the system for refrigerant leaks.

System Evacuation

Connect Gauge Set

Evacuate the System

Detailed procedure for evacuating the system to the required vacuum level.

Electrical Wiring and Thermostat Connections

Electrical Wiring Guidelines

System Operation and Refrigerant Charging

Sequence of Operation

Start-Up Procedure

Refrigerant Charging

Details procedures for charging refrigerant, including methods and precautions.

Wiring Diagrams (Single Phase)

A;C Single Phase Wiring Diagram

Wiring Diagrams (Single Phase - 59 model)

A;C Single Phase Wiring Diagram (59 model only)

Wiring Diagrams (3 Phase)

3 Phase (208-230 Volt) Wiring Diagram

Wiring Diagrams (3 Phase - 460 Volt)

3 Phase (460 Volt) Wiring Diagram

System Refrigerant Handling

Servicing Units Void of Charge

Procedures for servicing units when refrigerant is depleted.

Gauge Set Connections

Airflow and Refrigerant Adjustment

Adding or Removing Refrigerant

Guidelines for adjusting refrigerant charge for HFC-410A systems.

Airflow Adjustment (Delta-T)

Charging Procedures and Data

14 SEER Charging Procedure

Outlines charging procedures for 14 SEER units.

Start-Up and Performance Checklist

Performance Checklist

Checklist for verifying unit start-up and performance parameters.