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AVFL Vent Free Fireplace
Monessen • AVFL42NIP-SR Installation Instructions • 4119-900 Rev. B • 05/20
FLAME APPEARANCE
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.
CHECK 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 gas. Refer to
Figure 23
for
correct pilot flame.
If the pilot flame does not touch the thermocouple, then
the main burner cannot function reliably. Refer to
Figure
24
for incorrect shape of pilot flame.
CHECK BURNER FLAME APPEARANCE
In normal operation, at full rate after 15 minutes, the flames
should appear as shown in
Figure 25
.
If logs are installed, the flames should be yellow and should
not impinge on the logs.
Figure 23 Correct Pilot Flame Appearance
MAINTENANCE AND CLEANING
Figure 24 Incorrect Pilot Flame Appearance
Thermocouple
for LP
Thermocouple
for Natural Gas
Thermocouple
for LP
Thermocouple
for Natural Gas
LG1181
AVFL36 burner flame
Figure 25 Burner Flame Appearance
(Shown with fireglass only)
