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5- Check the alignment of the ignitor and the sensor as
shown in figure 25 and table 13.
6- Replace burners and screws securing burner.
WARNING
Danger of explosion. Can cause injury or
death. Do not overtighten main burner
mounting screws. Snug tighten only.
TABLE 13
Dimension
Unit
Btuh Input
Length - in. (mm)
Ignitor
Sensor
A
130K
7-3/4 (197)
11 (279)
B
180K
5 (127)
5-1/2 (140)
C
240K
2-1/4 (57)
2-3/4 (70)
7- Replace access panel.
8- Restore electrical power and gas supply. Follow
lighting instructions attached to unit and use
inspection port in access panel to check flame.
D-Combustion Air Inducer (Gas Units)
A combustion air proving switch checks combustion air
inducer operation before allowing power to the gas
controller. Gas controller will not operate if inducer is
obstructed.
Under normal operating conditions, the combustion air
inducer wheel should be checked and cleaned prior to the
heating season. However, it should be examined
periodically during the heating season to establish an
ideal cleaning schedule. With power supply
disconnected, the condition of the inducer wheel can be
determined by looking through the vent opening.
A
B
C
FIGURE 25
IGNITOR AND SENSOR POSITION
TOP VIEW
SIDE VIEW IGNITOR
SIDE VIEW SENSOR
1-3/4”
(45mm)
3/8”
(10mm)
1-3/8”
(35mm)
BURNER BOX
Gas Flow
Gas Flow
13/16”
(21mm)
A
B
C
IGNITOR
SENSOR
