Lennox KGB Series Installation and operation manual

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..................

Page 2
OPTIONS / ACCESSORIES
Item Model
No.
Catalog
No.
Unit Model No.
KGB
024
KGB
030
KGB
036
KGB
048
KGB
060
KGB
072
KGB
074
KGB
090
COOLING SYSTEM
Condensate Drain Trap PVC - C1TRAP20AD2 76W26 XXXXXXXX
Copper - C1TRAP10AD2 76W27 XXXXXXXX
Conventional Fin/Tube Condenser Coil (replaces Environ™ Coil System) Factory O O O O O ¹ O O
 K1SNSR71AB1- 74W42 XXXXXXXX
 K1SNSR33AN2 14D89 XXXXXXXX
󰀩  OOO
Standard O O O O O O O
Refrigerant Type R-410A O O O O O O O O
HEATING SYSTEM
Bottom Gas Piping Kit T1GPKT01AN1 19W50 XXXXXXXX

Heater
 19W53 XXXXXXXX
 19W54 XXXXXX
 19W62 XXXXXX
Combustion Air Intake Extensions T1EXTN10AN1 19W51 XXXXXXXX
Gas Heat Input  Factory O O O O 3O O O
 Factory 2O 2O O 2O 2O
 Factory O O 3O O O O
 Factory O O O O O O
 Factory ³ O 3O O O O
 Factory ³ O O O O O
LPG/Propane
Conversion Kits
For one-stage models - C1PROP10AP3 14N20 XXXXXXXX
 14N21 XXXXXX
 Factory O O O O O O O O
Vertical Vent Extension C1EXTN20FF1 31W62 XXXXXXXX
1074S models only.
2
3



X - Field Installed

Page 3
OPTIONS / ACCESSORIES
Item Model
No.
Catalog
No.
Unit Model No.
KGB
024
KGB
030
KGB
036
KGB
048
KGB
060
KGB
072
KGB
074
KGB
090
BLOWER - SUPPLY AIR
Motors  Factory O O
 Factory O
 Factory O
 Factory O
 Factory O O
 Factory O
󰀩 Factory O O O O 3 O4 O
󰀩 Factory O O O O 3 O4 O
󰀩 Factory 4 O
 Factory 3 O
 Factory 3 O5 O
Drive Kits

for selection
Kit A01 - T1DRKT001-1 - 673-1010 rpm Factory O
Kit A02 - T1DRKT002-1 - 745-1117 rpm Factory O
Kit A03 - T1DRKT003-1 - 833-1250 rpm Factory O
Kit A04 - T1DRKT004-1 - 968-1340 rpm Factory O 1O
Kit A05 - T1DRKT005-1 - 897-1346 rpm Factory O
Kit A06 - T1DRKT006-1 - 1071-1429 rpm Factory O
Kit A07 - T1DRKT007-1 - 1212-1548 rpm Factory O
Kit A08 - T1DRKT008-1 - 1193-1591 rpm Factory O 1O
Kit AA01 - T1DRKT001AP1 - 522-784 rpm Factory O 2O
Kit AA02 - T1DRKT002AP1 - 632-875 rpm Factory O 2O
Kit AA03 - T1DRKT003AP1 - 798-1105 rpm Factory O 2O
Kit AA04 - T1DRKT004AP1 - 921-1128 rpm Factory 6O
CABINET
Combination Coil/Hail
Guards
C1GARD51A-1 13R98 XXXX
C1GARD51AT1 13T03 XXX
K1GARD50AP1 13T17 X
Corrosion Protection Factory OOOOOOOO
Hinged Access Panels OOOOOOOO
CONTROLS

Smoke Detector - Supply or Return

C1SNSR44AP1 53W78 XXXXXXXX
Smoke Detector - Supply and Return

C1SNSR43AP1 53W79 XXXXXXXX
L Connection®Building Automation System --- XXXXXXXX
1074S Belt Drive models only.
2074H Belt Drive models only.
3Single SpeedTwo Speed Belt Drive
4
5
6



X - Field Installed

Page 4
OPTIONS / ACCESSORIES
Item Model
No.
Catalog
No.
Unit Model No.
KGB
024
KGB
030
KGB
036
KGB
048
KGB
060
KGB
072
KGB
074
KGB
090
ECONOMIZER

Standard Economizer - Includes Barometric Relief

K1ECON30A-3- 14D90 OX OX OX OX OX OX OX OX
 Factory O O O O O O O X
Standard Economizer Controls (Not for Title 24)
 C1SNSR64FF1 53W64 OX OX OX OX OX OX OX OX
󰀨 C1SNSR64FF1 53W64 X X X X X X X X




K1ECON32A-3 16X75 OX OX OX OX OX OX OX OX

 C1SNSR60FF1 10Z75 OX OX OX OX OX OX OX OX
󰀨 C1SNSR60FF1 10Z75 X X X X X X X X
Economizer Accessories
Horizontal Economizer Conversion Kit T1HECK00AN1 17W45 XXXXXXXX
POWER EXHAUST FAN
Standard Static
NOTE - Field installed
Power Exhaust Fan
requires “Barometric
Relief Dampers for Power
Exhaust Kit” for eld
installation. See below.
 79W87 XXXXXX
 79W88 XXXXXX
 79W89 XXXXXX
1BAROMETRIC RELIEF
1 C1DAMP50A-3- 19D42 XXXXXX

Hood
LAGEDH03/15-2 19F01 XXXXXXXX
OUTDOOR AIR

Motorized C1DAMP21A-1 15D17 OX OX OX OX OX OX OX OX
Manual C1DAMP11A-2 15D18 OX OX OX OX OX OX OX OX
HUMIDITROL®CONDENSER REHEAT OPTION
Humiditrol  Factory O O O O O  O
 C0SNSR30FF1L 99N41 XXXXX  X
ELECTRICAL
Voltage

 OOOOO
 OOOOOO
 OOOOOO
 OOOOOO
Disconnect See Electrical Data Tables for selection OX OX OX OX OX OX OX OX
GFI Service
Outlets

LTAGFIK10/15
74M70 OX OX OX OX OX OX OX OX
 67E01 XXXXXXXX
 C1GFCI99FF1 10C89 XXXXXXXX
1
2
3
4074S models only.



X - Field Installed

Page 5
OPTIONS / ACCESSORIES
Item Model
No.
Catalog
No.
Unit Model No.
KGB
024
KGB
030
KGB
036
KGB
048
KGB
060
KGB
072
KGB
074
KGB
090
INDOOR AIR QUALITY
Air Filters
®
󰀩
Order 4 per unit
MERV 8 (16 x 20 x 2) - C1FLTR15A-1- 54W20 XXXX
MERV 13 (16 x 20 x 2) - T1FLTR40A-1- 52W37 XXXX
MERV 8 (20 x 20 x 2) - C1FLTR15D-1- 54W21 XXXX
MERV 13 (20 x 20 x 2) - C1FLTR40D-1- 52W39 XXXX
Indoor Air Quality (CO) Sensors
󰀨
display
C0SNSR50AE1L 77N39 XXXXXXXX

rated for plenum mounting
C0SNSR53AE1L 87N54 XXXXXXXX
CO
applications
C0MISC19AE1- 85L43 XXXXXXXX
Aspiration Box - for duct mounting non-plenum rated
COsensor (77N39)
C0MISC16AE1- 90N43 XXXXXXXX
CEILING DIFFUSERS
 RTD9-65S 13K60 XXXXX
RTD11-95S 13K61 XXX
 FD9-65S 13K55 XXXXX
FD11-95S 13K56 XXX
Transitions (Supply and Return) - Order one T1TRAN10AN1 17W53 XXXXX
T1TRAN20N-1 17W54 XXX
ROOF CURBS

 C1CURB70A-1 11F50 XXXXXXX2X
 C1CURB71A-1 11F51 XXXXXXX2X
 C1CURB72A-1 11F52 XXXXXXX2X
 C1CURB73A-1 11F53 XXXXXXX2X

 K1CURB70AP1 11S47 X
 K1CURB71AP1 11S48 X
 K1CURB72AP1 11T01 X
 K1CURB73AP1 11T06 X

 C1CURB55AT1 43W27 XXXXXXXX



X - Field Installed

Page 6
SPECIFICATIONS - DIRECT DRIVE BLOWER 2 TON | 2.5 TON
General Data Nominal Tonnage 2 Ton 2.5 Ton
Model No. KGB024S4E KGB030S4E
E󰀩ciency Type Standard Standard
Blower Type Multi-Speed
Direct Drive ECM
Multi-Speed
Direct Drive ECM
Cooling
Performance
  
1  
 810 
2Sound Rating Number (dBA) 74 74
 1.9 2.4
1 14.0 14.0
1 12.5 11.5
Refrigerant

Refrigerant Type R-410A R-410A
Environ™ Coil System 4 lbs. 1 oz. 5 lbs. 5 oz.
Conventional Fin/Tube Coil 10 lbs. 0 oz. 10 lbs. 8 oz.
Humiditrol®
 9 lbs. 15 oz. 10 lbs. 7 oz.
Gas Heating Options Standard
(1 Stage)
Standard
(1 Stage)
Compressor Type (one per unit) Scroll Scroll
Outdoor Coil
Environ™
(Fin/Tube)
Net face area - sq. ft. 11.7 (15.6) 11.7 (15.6)
 1 (2) 1 (2)
 23 (20) 23 (20)
Outdoor
Coil Fan
Motor - (No.) HP (1) 1/4 (1) 1/4
Motor rpm 825 825
 335 335
Diameter - (No.) in. / No. of blades (1) 24 - 4 (1) 24 - 4
Total air volume - cfm 3700 3700
Indoor Coil Net face area - sq. ft. 7.8 7.8
Tube diameter - in. 3/8 3/8
 2 3
 14 14
Drain Connection (no.) and size - in. (1) 1 NPT (1) 1 NPT
Expansion device type 
 Nominal Motor HP  
 (1) 10 x 10 (1) 10 x 10
Filters Type Disposable
Number and size - in. (4) 16 x 20 x 2
 208/230V

208/230V


1
2

Page 7
SPECIFICATIONS - DIRECT DRIVE BLOWER 3 TON | 4 TON
General Data Nominal Tonnage 3 Ton 3 Ton 4 Ton 4 Ton
Model No. KGB036S4E KGB036S4D KGB048S4E KGB048S4D
E󰀩ciency Type Standard Standard Standard Standard
Blower Type Multi-Speed
Direct Drive
ECM
Multi-Speed
Direct Drive
PSC
Multi-Speed
Direct Drive
ECM
Multi-Speed
Direct Drive
PSC
Cooling
Performance
    
1    
 1150 1150 1560 1560
2Sound Rating Number (dBA) 74 74 74 74
 2.9 2.9 4.1 4.1
1 14.0 14.0 14.0 14.0
1 12.3 12.3 11.5 11.5
Refrigerant

Refrigerant Type R-410A R-410A R-410A R-410A
Environ™ Coil System 5 lbs. 9 oz. 5 lbs. 9 oz. 5 lbs. 10 oz. 5 lbs. 10 oz.
Conventional Fin/Tube Coil 11 lbs. 3 oz. 11 lbs. 3 oz. 9 lbs. 13 oz. 9 lbs. 13 oz.
Humiditrol®
 12 lbs. 7 oz. 12 lbs. 7 oz. 9 lbs. 13 oz. 9 lbs. 13 oz.
Gas Heating Options Standard (1 or 2 Stage)
Medium (1 or 2 Stage)
Standard (1 or 2 Stage)
Medium (1 or 2 Stage)
High (1 or 2 Stage)
Compressor Type (one per unit) Scroll Scroll Scroll Scroll
Outdoor Coil
Environ™
(Fin/Tube)
Net face area - sq. ft. 14.5 (15.6) 14.5 (15.6) 14.5 (15.6) 14.5 (15.6)
 1 (2) 1 (2) 1 (2) 1 (2)
 23 (20) 23 (20) 23 (20) 23 (20)
Outdoor
Coil Fan
Motor - (No.) HP (1) 1/4 (1) 1/4 (1) 1/4 (1) 1/4
Motor rpm 825 825 825 825
 325 325 325 325
Diameter - (No.) in. / No. of blades (1) 24 - 4 (1) 24 - 4 (1) 24 - 4 (1) 24 - 4
Total air volume - cfm 3950 3950 3950 3950
Indoor Coil Net face area - sq. ft. 7.8 7.8 7.8 7.8
Tube diameter - in. 3/8 3/8 3/8 3/8
 3 3 3 3
 14 14 14 14
Drain Connection (no.) and size - in. (1) 1 NPT (1) 1 NPT (1) 1 NPT (1) 1 NPT
Expansion device type 
Indoor

Nominal Motor HP    
 (1) 10 x 10 (1) 10 x 10 (1) 10 x 10 (1) 10 x 10
Filters Type Disposable
Number and size - in. (4) 16 x 20 x 2
 208/230V


460V & 575V

208/230V


460V & 575V


1
2

Page 8
SPECIFICATIONS - DIRECT DRIVE BLOWER 5 TON
General Data Nominal Tonnage 5 Ton 5 Ton
Model No. KGB060S4E KGB060S4D
E󰀩ciency Type Standard Standard
Blower Type Multi-Speed
Direct Drive ECM
Multi-Speed Direct
Drive PSC
Cooling
Performance
  
1  
 1760 1760
2Sound Rating Number (dBA) 83 83
 5.0 5.0
1 14.0 14.0
1 11.0 11.0
Refrigerant

Refrigerant Type R-410A R-410A
Environ™ Coil System 8 lbs. 0 oz. 8 lbs. 0 oz.
Conventional Fin/Tube Coil 14 lbs. 3 oz. 14 lbs. 3 oz.
Humiditrol®
Option 15 lbs. 3 oz. 15 lbs. 3 oz.
Gas Heating Options Standard (2 Stage)
Medium (2 Stage)
High (2 Stage)
Standard (1 or 2 Stage)
Medium (1 or 2 Stage)
High (1 or 2 Stage)
Compressor Type (one per unit) Scroll Scroll
Outdoor Coil
Environ™
(Fin/Tube)
Net face area - sq. ft. 17.8 (19.3) 17.8 (19.3)
 1 (2) 1 (2)
 23 (20) 23 (20)
Outdoor
Coil Fan
Motor - (No.) HP (1) 1/3 (1) 1/3
Motor rpm 1075 1075
 375 375
Diameter - (No.) in. / No. of blades (1) 24 - 3 (1) 24 - 3
Total air volume - cfm 4700 4700
Indoor Coil Net face area - sq. ft. 9.7 9.7
Tube diameter - in. 3/8 3/8
 4 4
 14 14
Drain Connection (no.) and size - in. (1) 1 NPT (1) 1 NPT
Expansion device type 
Indoor

Nominal Motor HP  
 (1) 11 x 10 (1) 11 x 10
Filters Type Disposable
Number and size - in. (4) 20 x 20 x 2
 208/230V


460V & 575V


1
2

Page 9
SPECIFICATIONS - BELT DRIVE BLOWER SINGLE SPEED - 3 TON | 4 TON | 5 TON
General Data Nominal Tonnage 3 Ton 4 Ton 5 Ton
Model No. KGB036S4B KGB048S4B KGB060S4B
E󰀩ciency Type Standard Standard Standard
Blower Type Single Speed
Belt Drive
Single Speed
Belt Drive
Single Speed
Belt Drive
Cooling
Performance
   
1   
 1150 1560 1760
2Sound Rating Number (dBA) 74 74 83
 2.9 4.1 5
1 14.0 14.0 14.0
1 12.3 11.5 11.0
Refrigerant

Refrigerant Type R-410A R-410A R-410A
Environ™ Coil System 5 lbs. 9 oz. 5 lbs. 10 oz. 8 lbs. 0 oz.
Conventional Fin/Tube Coil 11 lbs. 3 oz. 9 lbs. 13 oz. 14 lbs. 3 oz.
Humiditrol® 12 lbs. 7 oz. 9 lbs. 13 oz. 15 lbs. 3 oz.
Gas Heating Options Standard (1 or 2 Stage)
Medium (1 or 2 Stage)
Standard (1 or 2 Stage)
Medium (1 or 2 Stage)
High (1 or 2 Stage)
Compressor Type (one per unit) Scroll Scroll Scroll
Outdoor Coil
Environ™
(Fin/Tube)
Net face area - sq. ft. 14.5 (15.6) 14.5 (15.6) 17.8 (19.3)
 1 (2) 1 (2) 1 (2)
 23 (20) 23 (20) 23 (20)
Outdoor
Coil Fan
Motor - (No.) HP (1) 1/4 (1) 1/4 (1) 1/3
Motor rpm 825 825 1075
 325 325 375
Diameter - (No.) in. / No. of blades (1) 24 - 4 (1) 24 - 4 (1) 24 - 3
Total air volume - cfm 3950 3950 4700
Indoor Coil Net face area - sq. ft. 7.8 7.8 9.7
Tube diameter - in. 3/8 3/8 3/8
 3 3 4
 14 14 14
Drain Connection (no.) and size - in. (1) 1 NPT (1) 1 NPT (1) 1 NPT
Expansion device type 
3Indoor

Selection
Nominal Motor HP   
Maximum Usable Motor Output (US Only)   
Available Drive Kits A01
673 - 1010 rpm
A05
897 - 1346 rpm
A02
745 - 1117 rpm
A06
1071 - 1429 rpm
A03
833 - 1250 rpm
A07
1212 - 1548 rpm
 (1) 10 x 10 (1) 10 x 10 (1) 10 x 10
Filters Type Disposable
Number and size - in. (4) 16 x 20 x 2 (4) 20 x 20 x 2
 

1
2
3



Page 10
SPECIFICATIONS - BELT DRIVE BLOWER SINGLE SPEED - 6 TON
General Data Nominal Tonnage 6 Ton 6 Ton
Model No. KGB072H4B KGB074S4B
E󰀩ciency Type High Standard
Blower Type Single Speed Belt Drive Single Speed Belt Drive
Cooling
Performance
  
1  
 1920 2150
2Sound Rating Number (dBA) 79 79
 6.0 6.1
1IEER 13.5 12.7
1 12.0 11.0
Refrigerant

Refrigerant Type R-410A R-410A
Environ™ Coil System 7 lbs. 8 oz. 7 lbs. 2 oz.
Conventional Fin/Tube Coil - - - 14 lbs. 8 oz.
Humiditrol® - - - 14 lbs. 11 oz.
Gas Heating Options Standard (1 or 2 Stage)
Medium (1 or 2 Stage)
High (1 or 2 Stage)
Standard (1 Stage)
Medium (1 or 2 Stage)
High (1 or 2 Stage)
Compressor Type (one per unit) Scroll 
Outdoor Coil
Environ™
(Fin/Tube)
Net face area - sq. ft. 17.8 17.8 (19.3)
 1 1 (2)
 23 23 (20)
Outdoor
Coil Fan
Motor - (No.) HP (1) 1/3 (1) 1/3
Motor rpm 1075 1075
 410 375
Diameter - (No.) in. / No. of blades (1) 24 - 3 (1) 24 - 3
Total air volume - cfm 4800 4700
Indoor Coil Net face area - sq. ft. 9.72 9.72
Tube diameter - in. 3/8 3/8
 4 4
 14 14
Drain Connection (no.) and size - in. (1) 1 NPT (1) 1 in. NPT
Expansion device type 
3Indoor

Selection
Nominal Motor Output  
Maximum Usable Motor Output (US Only)  
Motor - Drive Kit Number AA01
522-784 rpm
AA02
632-875 rpm
AA03
798-1105 rpm
A04
968 - 1340 rpm
A08
1193-1591 rpm
 (1) 15 x 9 10 X 10
Filters Type Disposable Disposable
Number and size - in. (4) 20 x 20 x 2 (4) 20 x 20 x 2
 

1
2
3

