Igniter; Flame Sensor - L.B. White Therma Grow HW120 Manuel De L'utilisateur

1. Disconnect the plastic male and female plugs located
at the end of the igniter leads. See Fig. 17.
2. Remove the screw securing the igniter to its bracket.
1. Remove the sensor from its mounting bracket. Clean
the sensor's rod with emery cloth or steel wool to
buildup of dirt to help maintain proper flame sense.
See Fig. 17.
2. Check the flame sensor's insulative base for any
cracks. If cracks are found, replace the sensor.
n
For proper flame sense operation, the flame sensor tip
must be properly positioned within the burner flame.
See Fig. 18.
FIG. 18
BURNER
FLAME
BURNER
CASTING

IGNITER

FLAME SENSOR

3/8 TO 1/2 IN.
FLAME SENSOR
21