Lennox 2SCU13 Series User Manual

# 48283B006 Page 1
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INSTALLATION AND MAINTENANCE
INSTRUCTIONS
2SCU13 Series
Split System Air Conditioner
Sharp metal edges can cause injury. When
installing the unit, use care to avoid sharp
edges.
WARNING
Installation and servicing of air conditioning
equipment can be hazardous due to internal
refrigerant pressure and live electrical com-
ponents. Only trained and qualified service
personnel should install or service this equip-
ment. Installation and service performed by
unqualified persons can result in property
damage, personal injury, or death.
WARNING
Risk of electrical shock. Disconnect all
remote power supplies before installing or
servicing any portion of the system. Failure
to disconnect power supplies can result in
property damage, personal injury, or death.
WARNING
The equipment covered in this manual is to be installed by trained and experienced
service and installation technicians. Improper installation, modification, service, or
use can cause electrical shock, fire, explosion, or other conditions which may cause
personal injury, death, or property damage. Use appropriate safety gear including
safety glasses and gloves when installing this equipment.
WARNING
Manufactured By
A.A.C.
A Lennox International Inc. Company
421 Monroe Street
Bellevue, OH 44811
TABLE OF CONTENTS
INSTALLATION ...................................... 2
START-UP ............................................ 10
OPERATION ........................................ 14
MAINTENANCE ................................... 14
CONNECTION DIAGRAMS ................. 16
WARRANTY ......................................... 18
*48283B006*

Lennox 2SCU13 Series Specifications

General

Brand	Lennox
Model	2SCU13 Series
Category	Air Conditioner
Language	English

Summary

General Safety Warnings

Electrical Shock Hazard

Warning about disconnecting power supplies before installation or servicing.

Hazardous Installation and Servicing

Warning about refrigerant pressure and live electrical components.

Electrical and Refrigerant Systems

Electrical Wiring Requirements

Compliance with electrical codes, grounding, and wiring practices.

Refrigerant Metering and Vertical Runs

Refrigerant Metering Device Installation

Instructions for installing fixed orifice and expansion valve metering devices.

Leak Testing and Safety

Leak Detection Procedures

Methods for checking system connections for refrigerant leaks using electronic detectors.

Refrigerant and Oxygen Safety

Critical warnings regarding the safe handling of refrigerants and avoiding oxygen use.

System Evacuation

Evacuation Importance and Hazards

Explanation of why evacuation is critical and dangers of deep vacuum.

Evacuation Procedure

Step-by-step process for evacuating the refrigerant lines and indoor unit.

Unit Start-Up and Refrigerant Charging

Pre-Start-Up Checks

Refrigerant Charge Calculation

Refrigerant Charging Methods

Refrigerant Charging Techniques

Weigh-In Charging Method

Subcooling Charging Method

Superheat Charging Method

Operation and Maintenance

Outdoor Unit Maintenance

Indoor Coil and Unit Maintenance

Single Phase Wiring Diagram

Wiring Diagram Components

Key identifying components and their abbreviations in the wiring diagram.

Single Phase Electrical Connections

Visual representation of the single-phase wiring for the unit.

Three Phase Wiring Diagram

Wiring Diagram Components (Three Phase)

Key identifying components and their abbreviations in the three-phase wiring diagram.

Three Phase Electrical Connections

Visual representation of the three-phase wiring for the unit.