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Lennox KGC150 - User Manual

Lennox KGC150
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Page 1
UNIT INFORMATIONUNIT INFORMATION
Service Literature
CAUTION
As with any mechanical equipment, contact with
sharp sheet metal edges can result in personal
injury. Take care while handling this equipment and
wear gloves and protective clothing.
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical power to unit OFF at disconnect
switch(es). Unit may have multiple power
supplies.
Table of Contents
Options . . . . . . . . . . . . . . . . . . . . . .Page 2

Spec. Gas Heat / High Altitude . . . Page 9
Blower Data . . . . . . . . . . . . . . . . . . Page 7
Electrical Data. . . . . . . . . . . . . . . . . Page 11
I Unit Components . . . . . . . . . . . . . Page 14
II Placement and Installation . . . . . Page 27
III Start Up Operation . . . . . . . . . . . Page 27
IV Charging . . . . . . . . . . . . . . . . . . . Page 30
V System Service Checks . . . . . . . Page 36
VI Maintenance . . . . . . . . . . . . . . . . Page 38
VII Accessories . . . . . . . . . . . . . . . . Page 40
VIII Diagrams . . . . . . . . . . . . . . . . . . Page 48

packaged gas units are available in standard cooling
󰀩       

heat sections are designed with aluminized steel tube
heat exchangers.
󰀨-
ent energy management thermostat control systems with
-


-
       -
able.
Information contained in this manual is intended for use

subject to change. Procedures outlined in this manual are
presented as a recommendation only and do not super-
sede or replace local or state codes.



for the proper rigging technique.
WARNING
To prevent serious injury or death:
1- Lock-out/tag-out before performing maintenance.
2- If system power is required (e.g., smoke detector
maintenance), disable power to blower, remove
fan belt where applicable, and ensure all
controllers and thermostats are set to the “OFF”
position before performing maintenance.
3- Always keep hands, hair, clothing, jewelry, tools,
etc., away from moving parts.
WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause property damage,
personal injury or loss of life. Installation and service
must be performed by a licensed professional HVAC
installer or equivalent, service agency, or the gas
supplier
KGC SERIES
7.5 to 12.5 ton
100097
KGC092 through 150

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Lennox KGC150 Specifications

General IconGeneral
BrandLennox
ModelKGC150
CategoryAir Conditioner
LanguageEnglish

Summary

Service Literature

Safety Warnings

Essential safety precautions for unit operation and maintenance.

OPTIONS; ACCESSORIES (CONT.)

Economizer and Outdoor Air Options

Economizer systems, accessories, and outdoor air damper options.

SPECIFICATIONS

General Data and Cooling Performance

Basic unit specs, tonnage, efficiency, and cooling performance metrics.

SPECIFICATIONS (CONT.)

Gas Heating Performance

Performance data for gas heating stages, input, output, and temperature rise.

BLOWER DATA

Base Unit Blower Performance

Blower performance data for base units, including static pressure and air volume.

BLOWER DATA (CONT.)

10 & 12.5 Ton Blower Performance

Blower performance data for 10 and 12.5 ton units.

ELECTRICAL DATA

7.5 & 8.5 Ton Electrical Data

Electrical specifications for 7.5 and 8.5 Ton KGC models.

ELECTRICAL DATA (CONT.)

10 & 12.5 Ton Electrical Data

Electrical specifications for 10 and 12.5 Ton KGC models.

Plumbing and Refrigerant Circuit Detail

Compressor Operation and Protection

STANDARD BLOWER ASSEMBLY

Determining Unit CFM and Belt Adjustment

Procedure for setting unit airflow (CFM) and adjusting blower belt tension.

GAS HEAT COMPONENTS

Gas Heat Safety and Control Components

Gas Valves, Spark Electrodes, and Flame Sensor

INTEGRATED CONTROL BOARD A3

IGNITION CONTROL A3 Operation

Heating Cycle Sequence

Step-by-step explanation of the ignition control's heating cycle operation.

III-STARTUP - OPERATION

Startup Checks and Heating Startup

Essential checks before startup and safety precautions for initiating heating.

Cooling Start Up Procedure

COOLING OPERATION MODES

IV-REFRIGERANT CHARGING

All Aluminum Outdoor Coil Charging

Specific charging procedures for units with all-aluminum outdoor coils.

Fin;Tube Coil Refrigerant Charge

Charge Verification - Approach Method

V-SYSTEMS SERVICE CHECKS

Heating System Checks and Gas Piping

Checks for heating system, gas piping installation, and pressure testing.

Gas Flow and Heat Exchanger Service

Heat Exchanger and Flame Sensing

Instructions for heat exchanger service and flame sensing adjustment.

VI-MAINTENANCE

Combustion Air Inducer Maintenance

Economizer Control and Sensors

A6 Enthalpy Control Operation

DCV Settings and Economizer Operation

N-Hot Gas Reheat Operation

VIII-Wiring Diagrams and Sequence of Operation

Sequence of Operation Overview

Cooling Stage Sequences

Step-by-step sequences for 1st and 2nd stage cooling, including component engagement.

Wiring Diagram - Gas Heating

GAS HEAT SEQUENCE OF OPERATION

Heating Stage Transitions

Detailed sequences for first stage heat, second stage heat, and end of heat stages.

Electronic;Electromechanical Thermostat Wiring

Electronic;Electromechanical Thermostat Wiring with Reheat

Electronic;Electromechanical Thermostat and Economizer Wiring

ECONOMIZER Wiring Diagram

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