Lennox Combustion Air Intake Extension Kit -- LG, TG, KG Gas Packaged Units Installation guide

Lennox
Brand
Lennox
Model
Combustion Air Intake Extension Kit -- LG, TG, KG Gas Packaged Units
Type
Installation guide

Lennox Combustion Air Intake Extension Kit -- LG, TG, KG Gas Packaged Units

The Lennox Combustion Air Intake Extension Kit is designed to extend the combustion air intake above the unit. This can be useful in a variety of applications, such as when the unit is installed in a location where the combustion air intake is obstructed, or when the unit is installed in a location where the combustion air is contaminated.

The kit includes an intake extension, an extension back, and a patch plate. The intake extension is made of durable metal and is designed to withstand the elements. The extension back is made of plastic and is designed to provide a weather-tight seal between the intake extension and the unit. The patch plate is made of metal and is designed to cover the existing combustion air intake opening on the unit.

Lennox Combustion Air Intake Extension Kit -- LG, TG, KG Gas Packaged Units

The Lennox Combustion Air Intake Extension Kit is designed to extend the combustion air intake above the unit. This can be useful in a variety of applications, such as when the unit is installed in a location where the combustion air intake is obstructed, or when the unit is installed in a location where the combustion air is contaminated.

The kit includes an intake extension, an extension back, and a patch plate. The intake extension is made of durable metal and is designed to withstand the elements. The extension back is made of plastic and is designed to provide a weather-tight seal between the intake extension and the unit. The patch plate is made of metal and is designed to cover the existing combustion air intake opening on the unit.

Page 1
INSTALLATION INSTRUCTIONS FOR INTAKE EXTENSION KITS USED ON
LG/KG/TG/SG/ZG PACKAGED GAS UNITS
506200-02
12/2020
Supersedes 3/2020
©2020
INTAKE EXTENSION KIT
PACKAGED UNITS KITS
AND ACCESSORIES
Shipping and Packing List
Package 1 of 1 contains:
1- Intake extension
1- Extension back (89L97, 89L98, & 20X99)
1- Patch plate (89L98 kits only)
Bag assembly containing:
16- #10 Screws (8 in 19W51)
10- #8 Screws (none in 19W51)
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
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.
Check packaging for shipping damage. Contact the last
carrier immediately if any shipping damage is found.
Application
The intake extension kit is used on gas packaged units to
extend the combustion air intake above the unit.
Kit Unit
89L97 LB-98897A
LGM/LGH/KG 156-300S,
LGA/LGC 248-360, SG 240,
LGA/LGC/TG 090-360
89L98 LB-98897B LGA/LGC 036 - 072
20X99 LB-98897E SG 036 & 060
19W51 LB-112082A LGM/LGH/KG 024 - 150,
ZG 092-150 & TG 024-072
Installation LGA/LGC 036 - 072 Units
1- Remove and discard the hood over combustion air
intake opening on -1 units.
2- 036-075-1 Units Only-
Install patch plate over right side of combustion air
intake as shown in figure 1. Secure in place with all
three screws. Discard patch plate when installing
extension on -2 units.
FIGURE 1
LGA/LGC A BOX UNITS (036-060-1)
COMBUSTION AIR
INTAKE OPENING
PATCH PLATE
036-072-1 ONLY
INTAKE
EXTENSION
FIGURE 2
LGA/LGC A BOX UNITS (036-060-2)
INTAKE
EXTENSION
COMBUSTION AIR
INTAKE LOUVERS
INTAKE
EXTENSION
Page 2
3- Install intake extension over combustion air intake
louvers. See figure 1 for -1 units and figure 2 for -2
units. Align top of intake extension flange just under
unit top flange. See figure 3. Secure in place with
screws provided.
FIGURE 3
INTAKE EXTENSION FLANGE
Align top of exten
sion flange with unit
top flange
UNIT TOP
FLANGE
INTAKE
EXTENSION
FLANGE
Installation LGM/LGH/KG 024-150,
TG 024-072 Units
1- Remove internal rain hood as shown in figure 4.
2- Install extension on unit. Position bottom of extension
7” (178mm) above bottom of heat section access
panel. See figure 5.
FIGURE 4
INTERNAL RAIN HOOD -
LGM/LGH/KG 024-150, TG 024-072 UNITS
INTERNAL
RAIN HOOD
Installation LGM/LGH/KG 156-300S, LGA/
LGC 248-360, SG 240, LGA/LGC/TG 090-360
1- Install the intake back on the extension using #8
screws provided. See figure 6.
2- Locate the three larger holes in the right extension
flange. See figure 6.
3- LGM/LGH/KG 156-300S, LGA/LGC/TG 090-240 -
Align top two larger holes on intake extension with
screws on the right side of combustion air louvers.
Secure the extension in place using #10 screws
provided.
4- TG/LGA/LGC248-360, SG 240 Units (D Box) -
Align bottom two larger holes on intake extension
with screws on the right side of combustion air
louvers. Secure the extension in place using the #10
screws provided.
FIGURE 5
INSTALL EXTENSION - LGM/LGH/KG 024-150,
TG024-072 UNITS
COMBUSTION
AIR INTAKE
LOUVERS
INTAKE
EXTENSION
7 in
(178mm)
FIGURE 6
LGM/LGH/KG 156-300S, LGA/LGC248-360,
SG 240, LGA/LGC/TG 090-360 UNITS -
090-150 UNIT SHOWN
COMBUSTION
AIR INTAKE
LOUVERS
INTAKE
EXTENSION
LGM/LGH/KG 156-300S,
LGA/LGC/TG 090-240 Units:
Align top two larger holes in
flange over intake louver
screws.
TG/LGA/LGC248H-360, SG 240 Units:
Align bottom two larger holes in flange
over intake louver screws.
INSTALL
INTAKE BACK
(090-360 UNITS)
Page 3
Installation SG 036, 060 Units
1- Install the intake back on the extension using #8
screws provided. See figure 7.
2- Center the intake extension over combustion air intake
louvers. Secure the extension in place using #10
screws provided.
FIGURE 7
INSTALL EXTENSION - SG 036, 060 UNITS
INSTALL
INTAKE BACK
Installation ZG 092-150 Units
1- Remove the unit badge, plug the existing holes and
drill new holes to secure badge. See figure 8.
2- Position the extension over combustion air intake
louvers as shown in figure 8.
3- Secure the extension to the unit using provided screws.
FIGURE 8
ZG 092-150
COMBUSTION
AIR INTAKE
LOUVERS
INTAKE
EXTENSION
FLUE
VENT/OUTLET
ACCESS
PANEL
HANDLE
GAS
INLET
Alight bottom of intake extension above access panel
handle. Align right side of intake extension to the left of
the flue vent/outlet. Secure extension to unit.
UNIT
BADGE
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Lennox Combustion Air Intake Extension Kit -- LG, TG, KG Gas Packaged Units Installation guide

Lennox
Brand
Lennox
Model
Combustion Air Intake Extension Kit -- LG, TG, KG Gas Packaged Units
Type
Installation guide

Lennox Combustion Air Intake Extension Kit -- LG, TG, KG Gas Packaged Units

The Lennox Combustion Air Intake Extension Kit is designed to extend the combustion air intake above the unit. This can be useful in a variety of applications, such as when the unit is installed in a location where the combustion air intake is obstructed, or when the unit is installed in a location where the combustion air is contaminated.

The kit includes an intake extension, an extension back, and a patch plate. The intake extension is made of durable metal and is designed to withstand the elements. The extension back is made of plastic and is designed to provide a weather-tight seal between the intake extension and the unit. The patch plate is made of metal and is designed to cover the existing combustion air intake opening on the unit.

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