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Flames from the pilot, front and rear 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 flame must always be present when the heater is in operation. It should just touch the top of the
thermocouple tip for natural. See Figures 23 and 25 for correct pilot flame.
If the pilot flame does not touch the thermocouple, then the main burner cannot function reliably. See Figures 24 and
26 for incorrect shape of pilot flame.
THERMOSTAT, MILLI-VOLT AND HI/LO CONTROL
Thermocouple
for Natural
Thermocouple
for LP
Figure 28 - Correct Appearance of Pilot Flame
MANUAL CONTROL
Thermocouple
for Natural
Thermocouple
for LP
Figure 30 - Correct Appearance of Pilot Flame
26D3311
Thermocouple
for Natural
Thermocouple
for LP
Figure 29 - Incorrect Appearance of Pilot Flame
Thermocouple
for Natural
Thermocouple
for LP
Figure 31 - Incorrect Appearance of Pilot Flame
FLAME APPEARANCE
23
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