Monessen Hearth DFX24C - Manual (Page 20)

0 33D4047
DFX & DBX Series Vent Free Fireplaces
FP2501
manual pilot flame
FP2273
pilot bad flame
FP2272
pilot correct flame
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. Refer to Figures 23 & 24 for correct pilot
flame.
If the pilot flame does not touch the thermocouple, then the main burner cannot function
reliably. Refer to Figures 23 & 24 for incorrect shape of pilot flame.
Figure 23 -
Millivolt Control Pilot Flame Appearance
Thermocouple
for Natural Gas
Thermocouple
for LP
FP7
Thermocouple
for Natural Gas
Thermocouple
for LP
FP73
MILLIVOLT CONTROL
Correct Pilot Flame Appearance Incorrect Pilot Flame Appearance
MANUAL & HI/LO CONTROL
Thermocouple
for Natural Gas
Thermocouple
for LP
Thermocouple
for Natural Gas
Thermocouple
for LP
FP50
Correct Pilot Flame Appearance
Incorrect Pilot Flame Appearance
Figure 24 -
Manual & Hi/Lo Control Pilot Flame Appearance