Harman Stove Company PB 105 - Manual (Page 35)

35 3-90-07205R19_05/13
FeedeR dOeS NOT Feed
1. No pellets in hopper.
2. Firebox draft may be too low for low draft pressure
switch in feeder circuit to operate. Check for
improperly closed doors, loose or missing gasket
on doors or hopper lid, or a faulty pressure 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 fire
manually.
4. Something is restricting flow in the hopper or causing
the slide plate to stick.
5. Feed motor has failed.
PARTIAllY BURNed PelleTS
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 status 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 chimney fire)
A 6 blink status may be caused by several things:
1. Blocked or partially blocked flue.
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 filled with
fines and small bits of ash.
4. The holes in the burnpot may be getting filled with
ash or carbon buildup.
5. Combustion blower fan blades may need cleaned.
6. There is no fuel in the hopper.
SMOKe SMell
Seal the vent pipe joints and connection to stove with
silicone.
FIRe HAS GONe OUT
1. No pellets in hopper.
2. Draft setting is too low.
3. Something is restricting fuel flow.
4. Feed motor or combustion blower has failed.
5. Power failure or blown fuse.
SMOKe IS VISIBle COMING OUT OF VeNT
1. Air-fuel ratio is too rich.
A. Feed rate too high.
B. Draft too low caused by a gasket leak.
lOW HeAT OUTPUT
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.
Cleaning Burn Pot
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. Be
sure the boiler is cold if you use a vacuum.
Carbon buildup can be scraped loose with the fire
burning using the special tool provided with your stove.
Scrape the floor and sides of the burn pot. The carbon
will be pushed out by the incoming fuel. Always wear
gloves to do this.
Removing Ashes
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-
fired.
Keep the boiler free of dust and dirt.
Fuel
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.
Troubleshooting
Helpful Hints