Monessen Hearth BTU/Hr - Manual (Page 22)

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INSPECTING HEATER
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 20 shows a correct pilot flame pattern.
Figure 21 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermocouple. This will cause
the thermocouple to cool. When the thermocouple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown in Figure 21
• turn heater off (see “To Turn Off Gas to Appliance,” page 21)
• see “Troubleshooting,” pages 24 through 26
BURNER FLAME PATTERN
Figure 22 shows a correct burner flame pattern. Figure 23 shows an incorrect burner flame pattern. The incorrect burner
flame pattern shows yellow tipping of the flame. It also shows the flame higher than one inch above the log.
Note: When using the heater the first time, the flame will be opaque orange/yellow for approximately one
hour until the log cures.
Thermocouple
for Natural
Thermocouple
for LP
Figure 21 - Correct Pilot Flame Pattern
Thermocouple
for Natural
Figure 22 - Incorrect Pilot Flame
Pattern Pilot Burner
Thermocouple
for LP
If yellow tipping occurs, your heater
could produce increased levels of
carbon monoxide. If burner flame
pattern shows yellow tipping, follow
instructions, bottom of this page.
W
ARNING
If pilot flame pattern is incorrect, as shown
in Figure 23,
• turn heater off (see “To Turn Off Gas
to Appliance,” page 21)
• see “Troubleshooting,” pages 24
through 26.
Do not mistake orange flames with
yellow tipping. Dirt or other fine
particles enter the heater and burn
causing brief patches of orange
flame.
NOTICE
Figure 24 - Incorrect Burner
Flame Pattern
Figure 22 - Correct Burner
Flame Pattern
Top of Flame Even
with Top of Log
Yellow Tippping