Lennox KGB036S4B

To Next Page

Page 1

100004

KGB SERIES

Service Literature

2 to 7-1/2 ton

7 to 26 kW

May 2020

KGB024 through 090

The KGB packaged gas units are available in standard

cooling efficiency (024, 030, 036, 048 060, 072, 074 and

090). Cooling capacities range from 2 to 7-1/2 tons (7 to

26kW).

KGB024, 030, 036, 048, 060, 072, 074 units are avail

able in 65,000 BTUH heat capacity /KGB036, 048, 060,

072, 074 and 090 units are available in 108,000 BTUH

(105,000 BTUH in earlier built units ) heat capacity.

KGB048, 060, 072, 074 and 090 units are available in

150,000 BTUH (44 kW) heat sizes. Two stage heat is

available in units with 108,000 (105,000 in earlier built

units) and 150,000 BTUH capacities. Gas heat sections

are designed with aluminized steel tube heat exchang

ers.

Information contained in this manual is intended for use by

qualified service technicians only. All specifications are

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.

If the unit must be lifted for service, rig unit by attaching four

cables to the holes located in the unit base rail (two holes at

each corner). Refer to the installation instructions for the

proper rigging technique.

WARNING

Improper installation, adjustment, alteration, service

or maintenance can cause property damage, person

al injury or loss of life. Installation and service must

be performed by a licensed professional installer (or

equivalent), service agency or the gas supplier.

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 discon

nect switch(es). Unit may have multiple

power supplies.

CAUTION

As with any mechanical equipment, contact with

sharp sheet metal edges can result in personal in

jury. Take care while handling this equipment and

wear gloves and protective clothing.

CAUTION

Electrostatic discharge can affect electronic

components. Take precautions during unit instal

lation and service to protect the unit's electronic

controls. Precautions will help to avoid control

exposure to electrostatic discharge by putting

the furnace, the control and the technician at the

same electrostatic potential. Neutralize electro

static charge by touching hand and all tools on an

unpainted unit surface, such as the gas valve or

blower deck, before performing any service pro

cedure.

ELECTROSTATIC DISCHARGE (ESD)

Precautions and Procedures

Table of Contents

Options Page 2.......................

Specifications Page 6..................

Spec. Gas Heat / High Altitude Page 13...

Blower Data Page 14...................

Electrical Data Page 31.................

I Unit Components Page 35.............

II Placement and Installation Page 48.....

III Start Up Operation Page 48...........

IV Charging Page 50...................

V System Service Checks Page 60.......

VI Maintenance Page 62................

VII Accessories Page 63................

VIII Diagrams Page 69..................

Main Page

SEER	14
HSPF	8.2
Refrigerant Type	R-410A
Voltage (V)	208/230
Phase	1
Cooling Capacity (BTU)	36000
Heating Capacity (BTU)	36000
SEER Rating	14
HSPF Rating	8.2

SEER

HSPF

8.2

Refrigerant Type

R-410A

Voltage (V)

208/230

Phase

Cooling Capacity (BTU)

36000

Heating Capacity (BTU)

36000

SEER Rating

HSPF Rating

8.2

Table of Contents

Lennox KGB036S4B Specifications

Summary

ELECTROSTATIC DISCHARGE (ESD)

Precautions and Procedures

SPECIFICATIONS - DIRECT DRIVE BLOWER

Indoor Blower

SPECIFICATIONS - BELT DRIVE BLOWER

General Data

Cooling Performance

Refrigerant Charge

Gas Heating Options

Compressor Type

Outdoor Coil

Outdoor Coil Fan

Indoor Coil

Indoor Blower & Drive Selection

Electrical Characteristics

SPECIFICATIONS - STANDARD GAS HEAT

THREE PHASE MODELS

SPECIFICATIONS - LOW NOx GAS HEAT

SINGLE AND THREE PHASE MODELS

BLOWER DATA

KGB024 S4 E | KGB030 S4 E

KGB036 S4 E

KGB048 S4 E

KGB060 S4 E

KGB036 S4 D | KGB048 S4 D

KGB060 S4 D

KGB036 S4 B

KGB048 S4 B

KGB060 S4 B

KGB072 H4 B | KGB074 S4 B

KGB074 S4 B | KGB074 S4 T

KGB090 S4 B | KGB090 S4 T

KGB072 H4 B | KGB074 H4 T

DOWNFLOW

3 and 4 Ton Standard Efficiency (Downflow)

5 Ton Standard Efficiency (Downflow)

HORIZONTAL

3 and 4 Ton Standard Efficiency (Horizontal)

5 Ton Standard Efficiency (Horizontal)

ELECTRICAL DATA

DIRECT DRIVE ECM - 2 TON | 2.5 TON

DIRECT DRIVE PSC - 3 TON

DIRECT DRIVE PSC - 5 TON

DIRECT DRIVE ECM - 3 TON | 4 TON | 5

DIRECT DRIVE PSC - 4 TON

I-UNIT COMPONENTS

Control Box Components

Blower, Fan, and Compressor Controls

Burner Control A3

B-Cooling Components

Compressor B1

SAFETY AND CONTROL COMPONENTS

Refrigerant System Safety Switches

Blower Compartment Details

DETERMINING UNIT CFM

Single-Speed, Direct Drive Blowers

Belt Drive Blowers

FIELD-ADJUSTABLE BLOWER SPEEDS

DIRECT DRIVE 208230 V

DIRECT DRIVE 460575 V

BLOWER BELT ADJUSTMENT

E-Blower Belt Adjustment

Belt Tensioner Adjustment

Manual Belt Tension Check

BELT ADJUSTMENT AND INSTALLATION

ADJUST BELT TENSIONER

INSTALL BELT

GAS HEAT COMPONENTS

Heat Exchanger

Burner Box Assembly

GAS HEAT COMPONENTS - SAFETY AND CONTROL

High Temperature and Flame Limit Switches

Combustion Air and Gas Valves

Spark Electrode (Ignitor)

FLAME SENSING AND INSTALLATION

Flame Sensor