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Lennox KGB072 - User Manual

Lennox KGB072
56 pages
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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 KGB072 Specifications

General IconGeneral
BrandLennox
ModelKGB072
CategoryAir Conditioner
LanguageEnglish

Summary

Unit Support and Clearances

Connect Gas Piping

Pressure Test Gas Piping

Electrical Connections

Control Wiring

Blower Operation and Adjustments

Determining CFM - Direct Drive Blowers

Steps to determine airflow (CFM) for direct drive blowers using static pressure.

Determining Unit CFM - Belt Drive Blowers

Blower Belt Adjustment

Blower Belt Adjustment - M Volt Units

Blower Data - Direct Drive - KGB024

Blower Data - Direct Drive - KGB030

Blower Data - Direct Drive - KGA;KGB036, KGA;KGB048

Blower Data - Direct Drive - KGA060

Blower Data - Direct Drive - KGB060

Blower Data - Direct Drive - KCA;KCB036, KCA;KCB048

Blower Data - Belt Drive - KCA;KCB048

Blower Data - Belt Drive - KGA060

Blower Data - Belt Drive - KGB060

Blower Data - Belt Drive - KGA072, KGB072 & 074 - DOWNFLOW

Blower Data - Belt Drive - KCA090 - DOWNFLOW

Blower Data Summary

Belt Drive Kit Specifications

Table detailing specifications for belt drive kits, including motor and blower choices.

Cooling Start-Up

Operation

Procedure for initiating unit operation in cooling mode based on thermostat demand.

Voltage Phasing

Instructions for ensuring correct voltage phasing for three-phase scroll compressors.

Refrigerant Charge - Fin;Tube Coil

Normal Operating Pressures

Table listing normal operating pressures for fin/tube coils based on outdoor temperature.

Approach Method - Fin;Tube Coils

Refrigerant Charge - All-Aluminum Coil

Compressor Controls

Gas Heat Start-Up

Placing Unit In Operation

Step-by-step instructions for safely placing the gas unit into operation.

Heating Operation and Adjustments

Heating Sequence of Operation

Description of the heating cycle sequence, including inducer and ignition.

Service and Maintenance

Combustion Air Inducer Cleaning

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