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MILLIVOLT PILOT AND MAIN BURNER FLAME
Pilot Flame Pattern
Figure 18 shows a correct pilot flame pattern. The correct flame
will be blue and will extend beyond the thermopile. The flame will
surround the thermopile just below the tip. A slight yellow flame
may occur where the pilot flame and main burner flame meet.
After prolonged use, the fireplace's pilot burner may require
cleaning to maintain the proper flame. Clean with canned air. Let
pilot sit to dry.
To Remove Pilot Orifice
1.
Disconnect the pilot supply line at the pilot burner.
2.
Remove pilot orifice from pilot burner. It may be necessary to
tap on pilot burner in order to remove the pilot orifice.
System Check
A millivolt meter set to the 0-1000 mV range is required to check
the system. Millivolt (mV) readings should be:
•
Across the thermopile terminals, 400-450 mV with
thermostat OFF.
•
Across the thermopile terminals, 150-250 mV with
thermostat ON.
•
Across the optional switch wires at the valve, less than 30
mV with optional switch ON.
•
Across the optional switch wires at the optional switch,
less than 5 mV with optional switch ON. Strong winds,
dirty pilot and low pressure will reduce readings.
33858-1-0615
CHARACTERISTICS
OPTIONS
}
TO THERMOPILE
OPTIONS
Figure 18
Pilot Flame Pattern
If pilot flame pattern is incorrect
•
See Troubleshooting, page 23.
Main Burner Flame Pattern
The main burner flame will be blue and yellow.
Main Burner Flame Ignition and Extinction
When the main burner is ignited it will take a few seconds for the
full flame pattern to develop.
When the main burner is extinguished it will take a few seconds
for the flames to disappear. It is normal to have the flames burn
down, as the remaining gas is burned.
Figure 19
Page 19
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