Harman Stove Company PB 105 Boiler User Manual


 
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
1. No pellets in hopper.
2. Firebox draft may be too low for low draft pres-
sure switch in feeder circuit to operate. 
, loose or missing
gasket on doors or hopper lid, or a faulty pres-
sure switch.
3. Feed motor will not run until the ESP
senses 170 deg. F. Maybe you did not put
enough pellets in the burn pot before lighting the
re manually.
4. Something is restricting ow in the hopper or
causing the slide plate to stick.
5. Feed motor has failed.

1. Feed rate too high.
2. Draft too low. (Check burn pot clean-out slide
and door gasket).
3. Burn pot or heat exchanger tubes may need
to be cleaned.
4. Combination of all the above.
5. #6 status blink: A 6 blink control board sta-
tus indication is caused by poor or incomplete
combustion. The Automatic Ignition circuit board
has the ability to track the combustion through
feed settings and ESP temperatures. When the
control board has calculated poor or incomplete
combustion, it will shut down the unit as a safety
feature. (Poor or incomplete combustion is a
contributer of creosote which may cause a chim-
ney re)
A 6 blink status may be caused by several
things:
1. Blocked or partially blocked ue.
2. Blocked or partially blocked inlet air.
a. Backdraft damper on the inlet pipe may be
stuck closed.
b. If outside air is installed, the inlet cover may
be blocked.
3. The air chamber under the burnpot may be
lled with nes and small bits of ash.
4. The holes in the burnpot may be getting lled
with ash or carbon buildup.
5. Combustion blower fan blades may need
cleaned.
6. There is no fuel in the hopper.

Seal the vent pipe joints and connection to stove
with silicone.

1. No pellets in hopper.
2. Draft setting is too low.
3. Something is restricting fuel ow.
4. Feed motor or combustion blower has failed.
5. Power failure or blown fuse.

1. Air-fuel ratio is too rich.
A. Feed rate too high.
B. Draft too low caused by a gasket leak.

1. Feed rate too low
2. Draft too low because of gasket leak.
3. Poor quality or damp pellets
4. Combination of 1 and 2.

Whenever your boiler is not burning, take
the opportunity to scrape the burn pot to remove
carbon buildup. A vacuum cleaner is handy to
remove the residue. 

Carbon buildup can be scraped loose with
the re burning using the special tool provided
with your stove. Scrape the oor and sides of the
burn pot. The carbon will be pushed out by the
incoming fuel. Always wear gloves to do this.

Ashes can be removed while in operation,
but extra care must be taken and always wear
gloves.
Maximum Feed Adjuster settings are not
needed in most cases. Operating in the normal
range (#4) is recommended when maximum heat
output is not required. The ESP prevents the
stove from being over-red.
Keep the boiler free of dust and dirt.

Pellet fuels are put into 3 categories in terms of
ash content. Premium at 1% or less, Standard at
3% or less and all others at 3% or more.
This unit is capable of burning all 3 categories
of pellets due to a patented feeder and burn pot
system.
It should be noted, however, that higher ash
content will require more frequent ash removal,
scraping of the burn pot, and may provide less
BTU’s per pound. Normally, standard and high ash
pellets cost less than premium pellets and can be
cost effective when burned in this boiler.
The moisture content must not exceed 8%.
Higher moisture will rob BTU’s and may not burn
properly.

