Monessen Hearth BDV300 User Manual

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54D0700
Figure 48 - Pilot Flame 
Thermopile 
Thermocouple 
Turn off gas before servicing fi replace. It is recommended that a qualifi ed  service 
technician perform these check-ups at the beginning of each heating season
W
ARNING
BURNER FLAME
The flames from the burner should be visually checked 
as soon as the heater is installed and periodically during 
normal operation. In normal operation, at full rate, and 
after operating for about 15 to 30 minutes, the flame 
should be yellow and slightly taller than the rear log. 
See Figure 49.
If the flame is blue and only in the center, turn off unit 
and let cool. After unit is cool, remove logs and check to 
make sure the back holes in the burner are not covered 
with rock wool. If the back holes are clear, add more rock 
wool to the center of the burner. Replace logs. 
NOTE: The type of installation, vent system 
confi guration, and wind effects may cause the 
fl ame patterns to vary.
Figure 49 - Burner Flame Appearance 
CLEANING AND MAINTENANCE 
BURNER, PILOT AND CONTROL COMPARTMENT
Keep the control compartment, logs, and burner areas surrounding the logs clean by vacuuming or brushing at least twice a 
year.  Make sure the burner porting, pilot air opening and burner air opening are free of obstructions at all times.
PILOT FLAME
The flames from the pilot should be visually checked as soon as the heater 
is installed and periodically during normal operation. The pilot flame must 
always be present when the fireplace is in operation. 
See Figure 48. The pilot 
flame has three distinct flames, one engulfing the thermopile, one engulfing the 
thermocouple, and the other reaching to the main burner..              
BURNER
Inspect area around the injector. Remove any lint or foreign material with a 
brush or vacuum.