Monessen Hearth PL20 Indoor Fireplace User Manual


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
1
Parlor Vent Free Fireplace
FP2273
pilot bad flame
FP2272
pilot correct flame


 In addition, periodically check the flames visually during operation.

It should just
touch the top of the thermocouple tip for natural. for correct pilot flame.
If the pilot flame does not touch the thermocouple, then the main burner cannot function
reliably. for incorrect shape of pilot flame.
Figure 23 -
Millivolt Control Pilot Flame Appearance
Thermocouple
for Natural Gas
Thermocouple
for LP
FP7
Thermocouple
for Natural Gas
Thermocouple
for LP
FP73

 

In normal operation, at full rate after 15
minutes, the flames should appear as shown
in .
The flames should be yellow and extend 3-4"
above the log top surfaces. The yellow flames
should not impinge on the logs.
LG723
PL20 log flames
Figure 24 -
Correct Burner Flame Appearance
LG73
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