30
AVFL Vent Free Fireplace
Monessen • AVFL42 Installation Instructions • 20305467 Rev. B • 02/17
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 27
for
correct pilot flame.
If the pilot flame does not touch the thermocouple, then
the main burner cannot function reliably. Refer to
Figure
36
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 37
.
If logs are installed, the flames should be yellow and should
not impinge on the logs.
Figure 35 –
Correct Pilot Flame Appearance
Thermocouple
for Natural Gas
Thermocouple
for LP
MAINTENANCE AND CLEANING
Air intake hole
Air intake hole
FP2272
pilot correct flame
FP2273
pilot bad flame
Thermocouple
for Natural Gas
Thermocouple
for LP
FP2273
Figure 36 –
Incorrect Pilot Flame Appearance
LG1181
AVFL36 burner flame
Figure 37 –
Burner Flame Appearance
(Shown with fireglass only)
LG1181
FP2272
