Lennox Hearth II-T C FS - Manual (Page 28)

ROUTINE MAINTENANCE
PAGE 28
EXHAUST PASSAGES AND VENT PIPE (All Models)
Inspect frequently and clean when necessary. Fly ash
will accumulate at all bends in the exhaust system. Note:
Large amounts of fly ash build-up will create a lack of
combustion air. Removing the clean out tee cap on verti-
cal installations will allow an inspection of the ash build-
up in the clean out tee and will help you to decide how
frequently more extensive cleaning must be performed.
Clean-Out Tee
Minimum Frequency of 1-2 months
DOOR ROPE GASKET (All Models)
The condition of the rope gasket around the door and
windows should be checked periodically and replaced or
repaired if necessary. A one-inch strip of paper may be
used to perform a test of the integrity of the door seal.
Close the door on the paper in at least eight points (see
illustration, “Door Rope Gasket”). It is normal to feel only
a slight amount of friction. The door gasket does not
need to be “tight” in all areas, since a small amount of
leakage is not hazardous or detrimental to the perform-
ance of your stove.
Door Rope Gasket
(check seal at points indicated by arrows)
Minimum Frequency of 3 months to 1 year
Visually inspect gasket often. If it becomes frayed or
damaged it should be replaced.
CREOSOTE REMOVAL
When wood is burned slowly, it produces tar and other
organic vapors, which combine with expelled moisture to
form creosote. The creosote vapors condense in the
relatively cool chimney flue of a slow-burning fire. As a
result, creosote residue accumulates on the flue lining.
When ignited this creosote makes an extremely hot fire.
The chimney connector and chimney should be in-
spected at least once every two months during the heat-
ing season to determine if a creosote buildup has oc-
curred.
If creosote has accumulated it should be removed to re-
duce the risk of a chimney fire.
Clean-Out Tee Rain Cap
Remove cover, then
remove ash
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