Lennox KCA048

©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

Lennox KCA048 Specifications

General

Cooling Capacity	48, 000 BTU/h
Refrigerant Type	R-410A
Voltage	208/230V
Phase	1
Sound Level (Outdoor Unit)	76 dB

Summary

Unit Support and Duct Connection

Unit Support

Guidelines for supporting the unit during installation, including roof mounting.

Rigging and Condensate Drains

Rigging Unit For Lifting

Instructions for safely lifting and maneuvering the unit using cables.

Gas Piping and Pressure Testing

Connect Gas Piping (Gas Units)

Guidelines for connecting the gas supply piping to the unit.

High Altitude Derate and Electrical Connections

Electrical Connections

Instructions for making electrical power and wiring connections.

Blower Operation and CFM Determination

Determining Unit CFM - Direct Drive Blowers

Method to determine airflow volume for direct drive blowers.

Blower CFM and Belt Adjustment

Determining Unit CFM - Belt Drive Blowers

Method to determine airflow volume for belt drive blowers.

Blower Belt Adjustment

Procedures for adjusting and maintaining blower belts.

Blower Belt Adjustment Procedures

Blower Belt Adjustment with Tensioner

Specific steps for adjusting belt tension on M volt units.

Check Belt Tension without Tensioner

How to check belt tension when no tensioner is present.

Blower Data - Direct Drive KGB024

Blower Data - Belt Drive KGA KGB036 KGA KGB048

Cooling Start-Up Procedures

Cooling Start-Up Operation

Steps to initiate cooling operation and thermostat demand.

Compressor Voltage Phasing

Correct phasing for three-phase scroll compressors.

Refrigerant Charge Check Fin-Tube Coils

Refrigerant Charge Verification Procedure

General steps for verifying refrigerant levels.

Refrigerant Charge Verification Methods

Approach Method Fin-Tube Coils

Method to verify charge using approach temperature.

Refrigerant Charge Check All-Aluminum Coil

Procedure for checking refrigerant charge in all-aluminum coils.

Gas Heat Start-Up

Placing Unit In Operation

Steps for placing the gas unit into operation.

Heating Operation and Electric Heat Start-Up

Heating Operation and Adjustments (Gas Units)

Heating sequence, ignition controls, and limits for gas units.

Electric Heat Start-Up (KC Units)