Empire Comfort Systems pmn - Manual (Page 17)

Page 17 15627-4-0806
Figure 16 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. Figure 17 shows an incorrect pilot
flame pattern. The incorrect pilot flame is not touching the
thermopile. This will cause the thermopile to cool. When the
thermopile cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown in Figure 17
• See Troubleshooting, page 21.
Correct Pilot Flame Pattern
Figure 16
Incorrect Pilot Flame Pattern
Figure 17
Figure 18 shows a correct main burner flame pattern. Figure 19
shows an incorrect main burner flame pattern.
Air Shutter Adjustment
An air shutter adjusting screw is located on the exterior, bottom
of the inner body. Screw air shutter adjusting screw IN to close
air shutter top (increase yellow flame). Screw air shutter adjusting
screw OUT to open air shutter top (decrease yellow flame).
If main burner flame pattern is incorrect, as shown in Figure 19
• See Troubleshooting, page 21.
Cleaning and Maintenance / Main Burner
Warning: Turn off heater and let cool before cleaning
After use, cleaning of the main burner may be required for the
proper flame. The main burner may be cleaned by applying air
pressure to the ports on the main burner.
Cleaning the Log Set and Firebox
During the annual inspection and maintenance appointment, the
service person should clean dust, lint, and any light accumulation
Correct Main Burner Flame
Figure 18
Incorrect Main Burner Flame
Figure 19
from the logs and the firebox area. An extra-soft brush should be
used on the logs as they are extremely fragile; a vacuum cleaner
may be used on the firebox. If at any time the logs cannot be
removed or installed without forcing, the cause must be found.
The logs must never be forced.
CAUTION: The ceramic logs are durable when handled and
installed properly. However, they are delicate and may be damaged
easily if not handled with care. Handling damage to the ceramic
logs is not covered by warranty.
DO NOT HANDLE LOGS WHILE THEY ARE HOT. ALLOW
PLENTY OF TIME FOR THE APPLIANCE TO COOL
COMPLETELY BEFORE HANDLING.
PLEASE NOTE
It is normal for appliances fabricated of steel to give off
some expansion and/or contraction noised during the start
up or cool down cycle. Similar noises are found with your
furnace heat exchanger or car engine.
PILOT FLAME CHARACTERISTICS
MAIN BURNER FLAME CHARACTERISTICS