Parts Arrangement - Lennox G40UH(X) Unit Information

Gasket
Pressure Port Location
For −1 to −14 Units
Flue Transition
Flame Sensor
Flame Rollout Switches*
Flame Rollout Bracket
Gas Valve
Burners
Gas Orifices
Gas Manifold
Ignitor Bracket
Burner Bottom Shield
*135 and 155 kBtuh units only −−
Flame rollout switches are located
on brackets on the inner sides (one
on the left and one on the right) of
the burner box.
G40UH(X) PARTS ARRANGEMENT
Flue Box Gasket
Combustion Air Orifice
Combustion Air
Prove Switch
Pressure
Port
Combustion Air Inducer
Limit Shield
Primary Limit
NO
(NO
x
Ignitor
Transformer
SureLight Control
FIGURE 1
Heat Exchanger
Flue Collector Box
Insert
x
Units Only)
Capacitor
DoorInterlock Switch
Page 14
Air Deflector
G40UH−48C−135,
G40UH−36C−110,
G40UH−60D−155 &
G40UH−60C−110−1, −2, −3
Units Only
Secondary Limit
(as required)
Blower Assembly