Lennox Hearth Products 1003C, Installation And Operation Manual

Page: 22 / 32

TROUBLESHOOTING
PAGE 22
CATALYST PLUGGING
1. Burning materials that produce a lot of char and fly
ash. Do not burn materials such as garbage, gift
wrap, cardboard, etc.
2. Burning wet pitchy woods or burning large loads of
small diameter wood with the combustor in the op-
eration position (without light-off taking place). Burn
proper fuel only. Do not close bypass until tempera-
tures are high enough to initiate light off.
CATALYST DEACTIVATION
1. Burning large quantities of trash, pressure-treated
lumber or painted woods, etc. will deactivate the
catalyst. Burn proper fuels only. See
Catalyst Re-
placement , page 20.
CATALYST SUBSTRATE CRACKING
1. Normal operation, as long as combustor remains
intact. If cracking causes large pieces to fall out, re-
place combustor.
2. Mishandling or abuse. Handle with care.
3. Excessive draft. Correct installation. See Draft Re-
quirements, page 11.
CATALYST SUBSTRATE
1. Extreme thermal shock. Combustor is being worked
too hard.
2. Excessive draft. Correct installation. See Draft Re-
quirements , page 11.
CATALYST PEELING
Extreme Temperatures (over-firing) at combustor sur-
face can cause the catalyst to peel. Some minor peeling
does not affect function. Severe peeling would close
cell openings and cause a plugging problem. If peeling
is severe, replace combustor. Do not overfire appliance.
See
Overfiring , on page 23.
TAR AND LIQUID CREOSOTE LEAKING FROM
METAL FLUE JOINTS
1. No chimney cap on chimney. Install cap.
2. Metal flue assembled improperly. Top flue sections
should be inserted into lower flue sections.
DENSE SMOKE LEAVING CHIMNEY
1. Water vapor (on cold still days water vapor may be
mistaken for smoke). Water vapor is normal and
should be of little concern.
2. Wet, pitchy woods being burned. Burn dry sea-
soned wood only.
3. Bypass in open position. Close bypass.
4. Combustor not functioning. See
Catalyst Replace-
ment , page 20.
NOISY HEAT SHIELD (OIL CANNING)
Rear or side heat shields make a noise (bong) during
heat up or cool down.
Large pieces of metal such as a side or rear heat shield
on a stove will normally expand and retract as it heats
and cools. If a noise develops in these shields (i.e. as
component heats and expands, it may flex, resulting in
a “bong” sound) it can be corrected. See following pro-
cedures:
There is an adjustable tension bolt in the center of the
rear heat shield. To eliminate the expansion noise
during stove use, adjust the bolt and nut to increase
tension on the shield.
Tension
Bolt