Pilot And Main Burner Flame Characteristics - Empire Comfort Systems BFM18MTN Installation Instructions And Owner's Manual

PILOT AND MAIN BURNER FLAME CHARACTERISTICS

Pilot Flame Pattern
Figure 12 shows a correct pilot flame pattern. The correct flame
will be blue and will extend beyond the thermocouple/thermopile.
The flame will surround the thermocouple/thermopile just below
the tip. A slight yellow flame may occur where the pilot flame and
main burner flame meet.
After use, cleaning of the pilot burner may be required for the proper
flame. The pilot orifice can be cleaned with high pressure air or
by placing under running water. Pilot orifice must be dry before
replacement. Use canned air to clean inside the pilot after the pilot
orifice has been removed.
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.
Pilot Flame Pattern
If pilot flame pattern is incorrect
• See Troubleshooting, page 21.
Main Burner Flame Pattern
The main burner flame will be yellow with a blue base.
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
near the rock wool, as the remaining gas is burned.
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Figure 12
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