Harman Stove Company PB 105, Installation & Operating Manual

30

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 pulling the (3) heat exchanger cleanout rods by

pulling and pushing these rods vigorously severl times. It 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 at all times.

Cleaning Steps

-Open 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 accumilated on the ledges of the burnpot, or burnpot
opening. At this time you can scrape and clean the burnpot
and fines cleanout area. Be careful not to damage the igniter
located inside the burnpot.

-Open firebox door and vaccum ash from ledges and

ash deflector. You can also clean the firebox door viewing
glass using a typical glass cleaner and soft cloth.

Heat Exchange r Cleanout Rod Handles

Heat Exchange r Tube

Ash Door

Firebox Door

Secondary Ash 
Chambe r Access Plate

Fines Cleanout Cover

Firebox Wall

Heat Exchange r Cleanout Rod Handles

Heat Exchange r Tube

Ash Door

Firebox Door

Secondary Ash 
Chambe r Access Plate

Fines Cleanout Cover

Firebox Wall

-Open ash door and remove the ash pan. Dispose of

any ash that has accumilated in the ash pan as well as any
fly ash from within the ash pan area.

-Remove the (4) thumbscrews on the secondary ash

chamber access plate and remove it to access the second-
ary ash chamber. Remove all fly ash from this area. This
process should be done as needed.

-Inspect all sealing gaskets to insure 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 when the hopper fuel level
is low whenever possible.