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Lennox KGA092 - User Manual

Lennox KGA092
34 pages
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©2017
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....................................
Safety Page 4.....................................
Unit Support Page 5................................
Duct Connection Page 5............................
Rigging Unit For Lifting Page 5.......................
Condensate Drains Page 6..........................
Connect Gas Piping Page 7.........................
Pressure Test Gas Piping Page 8.....................
High Altitude Derate Page 9.........................
Electrical Connections Page 9.......................
Unit Power-Up Page 10..............................
INSTALLATION
INSTRUCTIONS
KGA/KCA092
KGB/KCB092
KGA/KCA102
KGB/KCB102
KGA/KCA120
KGB/KCB120
KGB/KCB150
(7.5 Ton)
(7.5 Ton)
(8.5 Ton)
(8.5 Ton)
(10 Ton)
(10 Ton)
(12-1/2 Ton)
GAS AND COOLING PACKAGED UNITS
507118-07
8/2017
Supersedes 507118-06
Blower Operation and Adjustments Page 10............
Cooling Start-Up Page 18............................
Gas Heat Start-Up Page 28...........................
Heating Operation and Adjustments Page 29............
Electric Heat Start-Up Page 29........................
Supply Air Inverter Start-Up Page 30...................
Service Page 32....................................
RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE
KGA SHOWN
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Lennox KGA092 Specifications

General IconGeneral
ModelKGA092
RefrigerantR-410A
Cooling Capacity92000 BTU/hr
Cooling Capacity (BTU/hr)92000
Energy Efficiency Ratio (EER)9.2

Summary

Dimensions

Parts Arrangements

Shipping and Packing List

General Information

Safety and Clearances

Unit Clearances

Specifies required clearances around the unit for safe operation.

Unit Support

Downflow Discharge Application

Details unit support for downflow discharge installations.

Horizontal Discharge Applications

Details unit support for horizontal discharge applications.

Duct Connection

Rigging Unit For Lifting

Condensate Drains

Rear Drain Connection

Instructions for configuring the condensate drain at the rear of the unit.

Gas Piping Installation

Pressure Test Gas Piping

Procedure for testing gas piping connections for leaks.

High Altitude Derate

Electrical Connections

Power Supply

Details on connecting the main power supply to the unit.

Control Wiring

Instructions for routing and connecting control wiring.

Unit Power-Up

General Procedure

General steps and checks before applying power to the unit.

Blower Operation and Adjustments

Three Scroll Compressor Voltage Phasing

Ensures correct rotation and operation of compressors and blowers.

Blower Operation

Describes how the blower operates based on thermostat demand.

Blower Access

Instructions for accessing the blower assembly for service.

Determining Unit CFM

Procedure to set blower CFM for all modes.

Blower Belt Adjustment

Guides on adjusting belt tension and pulley for optimal performance.

Check Belt Tension

Procedure for checking and adjusting blower belt tension.

Cooling Start-Up

Operation

Steps for initiating cooling demands and unit operation.

Refrigerant Charge and Check

Procedure for checking and adjusting the refrigerant charge.

Gas Heat Start-Up

Placing Unit In Operation

Steps for initiating gas heat operation and burner ignition.

Ignition Control Diagnostic LEDs

Explains LED indicators for ignition control troubleshooting.

Heating Operation and Adjustments

Heating Sequence of Operation

Describes the sequence of events during heating operation.

Limit Controls

Information on factory-set limit controls for safety.

Electric Heat Start-Up

Supply Air Inverter Start-Up

Set Maximum Blower CFM

Procedure to set the maximum blower CFM for the inverter.

Set Blower Speed During Ventilation

Adjusts blower speed for energy savings during ventilation.

Set Damper Minimum Position

Adjusts minimum damper position for ventilation air volumes.

Service

Filters

Guidelines for checking and replacing unit filters.

Lubrication

Information on motor lubrication requirements.

Burners (Gas Units)

Instructions for inspecting and cleaning gas burners.

Combustion Air Inducer (Gas Units)

Procedures for cleaning the combustion air inducer.

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