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33PF100
Clean the flue outlet throat ( this is the hole that
goes up into the flue pipe). See Fig. 72.
Note: The ESP probe sensing tip extends into
this same area. CARE MUST BE TAKEN NOT TO
DAMAGE THE ESP PROBE DURING CLEAN-
ING. Bending of the ESP probe will make it difficult to
remove if it should become necessary. See Fig. 72.
Clean the inner chamber of the blower. See Fig 72.
Clean the furnace blower plate, sealing overlap.
See Fig 72. Inspect the tops of the heat exchanger tubes
where the chain shaker mechanism is located. Make sure
there are no fly ash buildups that may block the easy
flow of flue gasses into the combustion blower inlet hole.
( A flashlight may be necessary. )
Inspect the chain shaker mechanism for proper
operation.
Note: Fly ash can build up to the top edges of the
heat exchanger tubes without affecting operation. The
chain shaker will cause any excess to fall down into the
chamber under the tubes where it can be cleaned out
through the fire box. See Fig. 73.
The heat exchangers tubes have an external handle
that operates the cleaning mechanism. See Fig. 74.
This cleaning should be done at least once a week,
although it can be done as often as desired. The cleaner
the heat exchangers are, the more efficient the furnace
will be. This cleaning can be done at any time and in any
mode of operation.
Cleaning the Tube heat exchangers:
The handle has two directions of movement, Right
to Left and In and Out. All inside surfaces of these rect-
angular tubes can be cleaned with this range of motion.
First, with the handle pushed in, turn the handle right to
left, the full sweep, several strokes. Second, with the
handle pointing straight down, pull out and push inward
several strokes. Third, with the handle all the way out,
turn the handle right to left, the full sweep, several times.
End with the handle pushed inward and pointing down.
Shaker
handle
Lower cleanout chamber
ESP Probe
Access to flue outlet throat
Fig.72
Fig. 74
Sealing overlap
CAUTION: Inspect flue pipes, flue pipe joints and
flue pipe seals regularly to ensure that smoke and
flue gases are not drawn into, and circulated by,
the air-circulation system.
Maintenance
Fig. 73