Maintenance - Lennox Hearth Products L30 DVF-2 Installation And Operation Manual

MAINTENANCE

Always Turn Off Gas Control Valve Before Cleaning. Annual Maintenance Should Only Be Performed By A
Qualified Service Technician:
PERIODIC CHECK OF PILOT AND BURNER FLAMES
Check the operation of the pilot and cycle the burner. Visually
check the flame of the burner making sure the flames are
steady; not lifting or floating. The flame color should be blue at
the burner with yellow body and tops.
Cycle unit a minimum of 2 times
• Watch for smooth burner ignition and shut down.
• Burner: Check flame patterns. Ensure that burner flame
appearance does not vary greatly from diagram shown on
this page.
• Pilot: Ensure pilot flame appearance does not vary greatly
from diagram shown below.
PILOT FLAME APPEARANCE
A proper pilot flame should consist of torch-like flame issuing
from the pilot hood as shown in illustration below.
Proper Pilot Appearance
BURNER FLAME APPEARANCE
A periodic visual check of the pilot and burner flames should
be performed. If either the pilot or burner flame do not show
proper appearance or behavior, as outlined here, consult a
qualified gas appliance technician.
A proper burner flame is shown above. The burner flame
should have the following characteristics after initial start-up
(let appliance burn 15 to 20 minutes prior to accessing flame
appearance):
• Excessive impingement (contact of flame with logs)
should not occur.
• Rear burner flames should have yellowish tips; no soot
should form at burner flame tips.
• Flames should not raise off of burner (no "lifting" of
flame).
Air Shutter Adjustment
The flame can be adjusted to give the proper flame appearance
and to prevent sooting on the window or logs by adjusting the
position of the primary air shutter (located at the rear center
inlet to the burner). The air shutter should be positioned ap-
proximately 1/2 open for Natural Gas and approximately 3/4
open for LP Gas. See page 13, Burner Air Shutter.
NOTE: During periods of high natural gas demand, the gas
supplier may add "make-up gases" to the pipeline. This addi-
tion will change the composition of the supply gas, and may
cause a change in burner flame appearance. You may also
notice soot formation on the logs and viewing windows.
Check with your gas supplier if you suspect a change in the
composition of your gas supply.
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