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Lennox KCA090

Lennox KCA090
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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 KCA090 Specifications

General IconGeneral
BrandLennox
ModelKCA090
CategoryAir Conditioner
LanguageEnglish

Summary

Unit Support

Duct Connection

Condensate Drain Connections

Connect Gas Piping (Gas Units)

Pressure Test Gas Piping

Electrical Connections

Power Supply

Information regarding the power supply connection and wiring for the unit.

Control Wiring

Blower Operation and Adjustments

Blower Operation

Instructions on how the blower operates and is controlled by the thermostat.

Determining Unit CFM - Direct Drive

Procedure to measure and set the correct airflow (CFM) for direct drive blowers.

Blower Belt Adjustment

Determining Unit CFM - Belt Drive

Procedure to measure and set airflow (CFM) for belt drive blowers.

Blower Belt Adjustment

Guidelines for adjusting belt tension and pulley alignment for optimal blower performance.

Cooling Start-Up

Cooling Operation

Describes the operational states of the unit during cooling demand.

Compressor Voltage Phasing

Crucial steps for ensuring correct compressor and blower rotation for three-phase units.

Refrigerant Charge and Check

Refrigerant Charge and Check - All-Aluminum Coil

Refrigerant Charging Curves

Compressor Controls

Gas Heat Start-Up

Placing Unit In Operation

Step-by-step guide for safely starting the gas heating operation.

Heating Operation and Adjustments

Electric Heat Start-Up

Supply Air Blower Replacement

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