Harman PB 105, Owner'S Manual

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36
3-90-07205R26_10/14
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° 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 contributor 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 Termination Cap 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.
Troubleshooting
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.
Helpful Hints
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.
Summer Operation for domestic Hot Water
When the boiler is used solely for domestic hot water (e.g. in
the summer or shoulder seasons), extended periods of low
burn may cause faster than normal accumulation of ash &
creosote in the burnpot, firebox and venting system. Cleaning
the burnpot daily and inspecting the firebox & venting system
weekly is recommended during this type of usage. These
periods may be increased based on the level of accumulation
seen during daily & weekly cleanings.