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Lennox KGA090 - User Manual

Lennox KGA090
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©2015
Litho U.S.A.
WARNING
Improper installation, adjustment, alteration, ser
vice or maintenance can cause property damage,
personal injury or loss of life. Installation and ser
vice must be performed by a licensed professional
HVAC installer or equivalent, service agency, or the
gas supplier
Table Of Contents
Dimensions Page 2.................................
Parts Arrangements Page 3.........................
Shipping and Packing List Page 4....................
General Page 4....................................
Requirements Page 4...............................
Unit Support Page 5................................
Duct Connection Page 5............................
Rigging Unit For Lifting Page 6.......................
Horizontal Air Discharge Page 6......................
Condensate Drains Page 6..........................
Gas Piping Page 8.................................
Pressure Test Gas Piping Page 9.....................
High Altitude Derate Page 9.........................
Electrical Connections Page 9.......................
Blower Operation and Adjustments Page 11............
Cooling Start-Up Page 42............................
Gas Heat Start-Up Page 51...........................
Heating Operation and Adjustments Page 52............
Electric Heat Start-Up Page 52........................
Service Page 53....................................
INSTALLATION
INSTRUCTIONS
KGB/KCB024
KGB/KCB030
KGA/KCA036
KGB/KCB036
KGA/KCA048
KGB/KCB048
KGA/KCA060
KGB/KCB060
KGA/KCA072
KGB/KCB072
KGB/KCB074
KGA/KCA090
2-Ton
2-1/2-Ton
3-Ton
3-Ton
4-Ton
4-Ton
5-Ton
5-Ton
6-Ton
6-Ton
6-Ton
6-Ton
7-1/2 Ton
GAS AND COOLING PACKAGED UNITS
507348-04
12/2015
Supersedes 507348-01, -02, -03
RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE
KG SHOWN

Table of Contents

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Lennox KGA090 Specifications

General IconGeneral
BrandLennox
ModelKGA090
CategoryAir Conditioner
LanguageEnglish

Summary

Installation Instructions Overview

Unit Dimensions and Views

Parts Arrangement and Identification

Unit Support and Mounting

Duct Connection Procedures

Rigging Unit for Lifting

Horizontal Air Discharge Configuration

Gas Piping Connection

Gas Piping Pressure Testing

Electrical Connections and Power Supply

Control Wiring and Thermostat Installation

Control Wiring Procedures

Instructions for routing and connecting control wiring to the thermostat.

Blower Operation and Adjustments

Determining CFM for Direct Drive Blowers

Procedure to determine unit CFM using static pressure and blower speed.

Determining CFM for Belt Drive Blowers

Blower Belt Adjustment and Maintenance

Belt Tensioner Blower Belt Adjustment

Belt Tension Check (No Tensioner)

Cooling Start-Up Procedure

Three-Phase Compressor Voltage Phasing

Ensuring correct compressor and blower rotation for three-phase units.

Refrigerant Charge Check (Fin;Tube Coil)

Approach Method Refrigerant Verification

Refrigerant Charge Check (All-Aluminum Coil)

Compressor Controls and Safety Features

Gas Heat Start-Up Procedure

Unit Operation for Gas Heat

Steps for placing the unit in operation for gas heating.

Gas Valve Operation

Heating Operation and Adjustments

Heating Sequence of Operation

Step-by-step process of the heating cycle, including ignition.

Electric Heat Start-Up (KC Units)

Unit Service and Maintenance

Gas Burner Inspection and Cleaning

Procedure for examining and cleaning gas burners for proper operation.

Combustion Air Inducer Cleaning

Evaporator Coil Cleaning

Condenser Coil Cleaning and Inspection

Supply Air Blower Replacement Procedure

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