Harman Stove Company PB 105 - Manual (Page 33)

33 3-90-07205R19_05/13
Maintenance
Cleaning
This cleaning should be done after each ton of pellets
used. The frequency of this cleaning will be directly
related to the quality and the ash content of the pellets
being used. Keep in mind that the cleaner the heat
exchanger surface is kept, the higher the heat transfer
efficiency will be.
Due to it’s ease of restarting it is recommended that the
boiler be OFF and COOl before cleaning.
Start by actuating the (3) heat exchanger cleanout rods
by pulling and pushing these rods vigorously several
times. This action will remove any fly ash built up on
the heat exchanger tubes. This can also be done at any
time during the operation of the boiler to maintain higher
efficiencies. Make sure that these rods are pushed in
when cleaning is completed.
Cleaning Steps
1. Open the hopper swing plate to access burnpot and
also the firebox. With a wisp brush, wire brush, stiff
bristled paint brush or a soot vac, clean the firebox
walls and any fly ash that has accumulated on the
ledges of the burnpot, or burnpot opening. At this
time you can scrape and clean the burnpot and fines
cleanout area.
2. Open firebox door and vacuum ash from ledges and
ash deflector. You can also clean the firebox door
viewing glass using a typical glass cleaner and soft
cloth.
3. Open the ash door and remove the ash pan. Dispose
of any ash that has accumulated in the ash pan as
well as any fly ash from within the ash pan area.
4. Remove the (4) thumbscrews on the secondary ash
chamber access plate and remove it to access the
secondary ash chamber. Remove all fly ash from
this area. This process should be done as needed.
5. Inspect all sealing gaskets to ensure a proper seal
and re-install all components removed for cleaning.
CAUTION: Cleanout of the heat exchanger,
flue pipe, chimney, and combustion blower fan
housing, is especially important at the end of the
heating season to minimize corrosion during the
summer months, caused by accumulated ash.
NOTE: To minimize the amount of stress placed
on the hopper swing plate hinges, opening of the
hopper swing plate should be done with the least
amount of fuel in the hopper as possible.
Heat Exchanger Cleanout Rod Handles
Firebox Door
Heat Exchanger Tube
Secondary Ash
Chamber Access Plate
Ash Door
Firebox Wall
Fines Cleanout Cover