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26 81D0107
FLAME APPEARANCE
Figure 30 - Correct Appearance of Pilot Flame
Figure 31 - Incorrect Appearance of Pilot Flame
Thermocouple
for Natural
Thermocouple
for LP
Thermocouple
for LP
Thermocouple
for Natural
Flames from the pilot and burner should be visually checked as soon as the heater is installed. In addition,
periodically check the flames visually during operation.
CHECKING THE PILOT FLAME
The pilot fl ame must always be present when the heater is in operation. It should just touch the top of the ther-
mocouple tip for natural. See Figure 30 for correct pilot flame.
If the pilot flame does not touch the thermocouple, then the main burner cannot function reliably. See Figure 31 for incor-
rect shape of pilot flame.
MILLIVOLT CONTROL AND THERMOSTAT CONTROL