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Lennox KGB074 - User Manual

Lennox KGB074
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 KGB074 Specifications

General IconGeneral
BrandLennox
ModelKGB074
CategoryAir Conditioner
LanguageEnglish

Summary

Rigging Unit For Lifting

Horizontal Air Discharge

Procedures for converting unit to horizontal air discharge.

Connect Gas Piping (Gas Units)

Pressure Test Gas Piping (Gas Units)

Electrical Connections

POWER SUPPLY

Details on connecting the power supply to the unit, including voltage options.

CONTROL WIRING

A-Thermostat Location

Guidance on selecting the optimal location for a room thermostat.

B-Control Wiring

Instructions for routing and connecting thermostat wiring to the unit.

Blower Operation and Adjustments

B-Determining Unit CFM - Direct Drive Blowers

Method to determine unit CFM for direct drive blowers based on static pressure.

C-Determining Unit CFM - Belt Drive Blowers

D-Blower Belt Adjustment

E-Blower Belt Adjustment - M Volt Units With 3 HP Blowers Equipped With A Belt Tensioner

F-Check Belt Tension - Units Not Equipped With A Belt Tensioner

Cooling Start-Up

B-Three Phase Scroll Compressor Voltage Phasing

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

Gas Heat Start-Up (Gas Units)

Heating Operation and Adjustments (Gas Units)

Service

C-Burners (Gas Units)

Procedure for inspecting and cleaning gas burners.

D-Combustion Air Inducer (Gas Units)

J-Supply Air Blower Replacement

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