Monessen Hearth MJ27NR User Manual

Page of 40
28 
86D0024
FP2015
pilot flame wrong
FLAME APPEARANCE
Figure 31 - Correct Appearance of Pilot Flame
Figure 32 - Incorrect Appearance of Pilot Flame
Thermocouple
for LP
Thermocouple
for Natural 
Flames from the pilot and burner should be visually checked as soon as the heater 
is installed. In addition, periodically check the flames visually during operation.
ChECkING 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. Figure 31 for correct pilot flame. 
If the pilot flame does not touch the thermocouple, then the main burner cannot function 
reliably. Refer to Figure 32 for incorrect shape of pilot flame.
 
FP2014
pilot flame correct
Thermocouple
for Natural  
Thermocouple
for LP
FP2014
FP2015