Lennox LCH036 Installation Instructions Manual page 93

C
1-3/8"
(35mm)
HEAT EXCHANGER ASSEMBLY
HEAT
EXCHANGER
TUBE
COMBUSTION
AIR INDUCER
GAS VALVE
BURNER
FIGURE 35
IGNITOR AND SENSOR POSITION
IGNITOR
A
B
SIDE VIEW IGNITOR
Gas Flow
13/16"
(21mm)
VENT
CONNECTOR
TOP VIEW
SIDE VIEW SENSOR
Gas Flow
BURNER BOX
FIGURE 34
E-Flue Passageway and Flue Box (Gas Units)
1- Remove combustion air inducer assembly as
described in section D.
2- Remove flue box cover. Clean with a wire brush as
required.
3- Remove inserts if installed. See figure 36.
4- Clean tubes with a wire brush.
5- Reassemble the unit. The flue box cover gasket and
combustion air inducer gasket should also be
replaced during reassembly.
F-Gas Heat Exchanger Inserts
1- Inserts are installed on standard (130,000Btuh) and
high (240,000Btuh) heat exchangers. Medium heat
exchangers do not require inserts. See figure 36.
Page 43
SENSOR
A
B
C
1-3/4"
(45mm)
(10mm)
3/8"