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The boiler MUST be OFF and COOL before you
should attempt to clean the combustion blower.
The wire to the combustion blower doesn’t need to be
disconnected during the cleaning process.
Loosen the three (3) thumb screws about 4 turns each.
See Fig. 23. Hold the motor head with one hand and the
blower plate handle with the other hand. Pull outward
on the plate handle until the complete unit comes loose.
Now rotate the plate counter-clockwise about 1/8 turn.
This will allow the complete assembly to be removed
from the blower chamber.
Clean the blower fan blades and the blower plate
sealing overlap. See Fig. 24.
NOTE: Be careful not to bend the fan blades, this will
throw the fan blade out of balance or it may rub the inner
chamber, which may affect the performance of the boiler.
Any horizontal and vertical ue pipe directly above the unit
should be cleaned at this time
NOTE: The horizontal ue pipe directly above the boiler
is the rst place y ash will settle, due to the slowing of ue
gas velocity through horizontal pipe. Cleaning of horizon-
tal venting pipes is very important to the efciency of this
boiler.
Clean the ue outlet throat as well as the inner chamber
of the ue tunnel (this is the hole that goes up into the
ue pipe). See Fig. 24.
NOTE: The exhaust probe sensing tip extends into
this same area. CARE MUST BE TAKEN NOT TO
DAMAGE THE ESP DURING CLEANING. Bending
of the ESP will make it difcult to remove if it should
become necessary. See Fig. 23.
Clean the boiler blower plate, sealing overlap. See Fig
24. Make sure there are no y ash buildups that may
block the easy ow of ue gasses into the combustion
blower inlet hole. ( A ashlight may be necessary. )
Cleaning the Tube Heat Exchangers:
The heat exchanger tubes have external handles that
operate the cleaning mechanisms. See picture on page 32.
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 efcient the boiler
will be. This cleaning can be done at any time and in
any mode of operation. During high re periods, the
cleaning rods may stick due to heat related expansion.
Combustion Blower Cleaning
Remove the combustion blower heat shield. There are
two latches that hold the shield in place (See Fig. 22). Flip
the latches up and pull the shield away from the boiler.
It can not be fully removed, it can only be moved down
over the wire until it hangs on the junction box.
CAUTION: Inspect ue pipes, ue pipe joints and
ue pipe seals regularly to ensure that smoke and
ue gases are not entering the home.
Fig. 23
Thumb Screws (3 Total)
Combustion
Blower Motor
Exhaust Probe
Fig. 24
Heat Shield
Latch
Fig. 22
Sealing Overlap
5” Double
Bladed Fan