Lennox International Inc. o23v - Manual (Page 25)

Page 25
IX−TROUBLESHOOTING
Burner failure or improper unit operation can be caused by various conditions. Often the problem can be solved by a logical pro-
cess of checks and eliminations. The following pages lists a few common problems along with the solutions. Carefully check
the most obvious items first before proceeding to more involved procedures.
COMMON CHIMNEY VENTING PROBLEMS
Problem: Top of chimney lower
than surrounding objects.
Solution:Extend chimney above
all objects within 10 feet
(3 meters).
Problem: Chimney cap or ventilator.
Solution: Remove.
Problem:Coping restricts opening.
Solution:Make opening as large as
inside of chimney.
Problem:Obstruction in chimney. Obstruction can be found by
light and mirror reflecting conditions in chimney.
Solution: Use weight to break and dislodge.
Problem: Joist projecting into chimney.
Can be found by lowering a light on an ex-
tension cord.
Solution: Must be handled by a
competent brick contractor.
Problem:Loose fitting clean−out door.
Detected by smoke test.
Solution: Close all leaks with cement.
Problem: Failure to extend the length of
the flue partition down to the floor. De-
tected by inspection or smoke test.
Solution: Extend partition to floor level.
Problem: Smoke pipe extends into chimney.
Detected by measurement of pipe from within or ob-
servation of pipe by means of a lowered light.
Solution: Length of pipe must be reduced to allow end
of pipe to be flush with inside of tile.
Problem: Loose−seated pipe in flue
opening. Detected by smoke test.
Solution: Leaks should be eliminated
by cementing all pipe openings.
Problem: Two or more openings
into same chimney. Can be found
by inspection.
Solution: The least important
opening must be closed
Problem: Offset. Can be found
by lowering light on extension.
Solution: Change to straight or
long offset.
Problem: Collection of soot at narrow space in the
flue opening. Can be found by lowering light on
extension cord.
Problem: Clean out with weighted brush or bag of
loose gravel on end of line.
Problem: Break in chimney lining. Can be
found by Smoke test-build smudge fire block-
ing off other opening and watching for smoke
to escape.
Solution: Must be handled by a
competent brick contractor.
FIREPLACE
ASH DUMP
FIRE-
PLACE
DAMPER