Harman XXV Installation & Operating Manual page 23

Fig. 36
Brush, not
supplied, can
be found in
hardware stores.
Fig. 37
Fig. 38
Maintenance
6. Remove the ash pan and dispose of ashes in an ap-
proved manner, according to local codes.
7. Remove the combustion blower by loosening the
 wingnuts, twisting the combustion blower mount
plate counterclockwise to unlock, and pulling the
blower out.
8. Clean the combustion blower wheel with a brush and
a vacuum cleaner. Note: Do not use a household
vacuum to clean the stove. We recommend that you
use a shop vacuum that is equipped with a fine dust
filter called a HEPA filter or a vacuum specially made
for fly ash and soot. USING A VACUUM WHICH
IS NOT EQUIPPED WITH A FINE DUST FILTER
WILL BLOW FLY ASH AND SOOT OUT INTO THE
ROOM.
NOTE: THE STOVE MUST BE COMPLETELY OUT
BEFORE YOU VACUUM THE STOVE. LIVE PEL-
LET EMBERS, IF SUCKED INTO THE VACUUM,
WILL LIGHT THE VACUUM ON FIRE AND MAY
ULTIMATELY CAUSE A HOUSE FIRE.
9. Use a brush to clean the flue, being careful not to
damage the ESP probe.
10. Reinstall the combustion blower by turning plate
clockwise to lock into place and tightening the  wing-
nuts. Be sure the fan plate is flush with the exhaust
housing on the stove body and the motor armature
points up toward the hopper.
11.Slide ash pan into the stove and latch the door.
Soot and Fly ash
Formation and need for removal - The products
of combustion will contain small particles of flyash.
The flyash will collect in the exhaust venting system
and restrict the flow of exhaust gases. Incomplete
combustion, such as occurs during startup, shutdown,
or incorrect operation of the room heater will lead to
some soot formation which will collect in the exhaust
ESP
venting system. the entire exhaust venting system
Probe
should be professionally cleaned at least once
every year.
Be careful not
The products of combustion will contain small par-
to damage ESP
ticles of fly ash which must be removed from the inner
probe when
walls of the stove and from the venting system
cleaning with
cally. Removing fly ash and soot improves efficiency
brush.
and insures that the flue venting passageway is clear
and unobstructed. The stove should be cleaned after
each ton of pellets (50 bags) and the venting system
inspected and cleaned after each heating season.
periodi-
XXV Pellet Stove