Maintenance - Lennox L30 BF-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
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 dia-
gram 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 be-
low.
Proper Pilot Appearance
OF PILOT AND BURNER
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 ap-
pearance and to prevent sooting on the window or logs
by adjusting the position of the primary air shutter (lo-
cated at the rear center inlet to the burner). The air
shutter should be positioned approximately 1/2 open for
Natural Gas and approximately 3/4 open for LP Gas. .
See page 10, Burner Air Shutter.
NOTE: During periods of high natural gas demand, the
gas supplier may add "make-up gases" to the pipeline.
This addition will change the composition of the supply
gas, and may cause a change in burner flame appear-
ance. 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.
PAGE 17