Trouble Shooting; Helpful Hints; Fuel; Troubleshooting - Harman XXV Installation & Operating Manual

StOVe dOeS nOt Feed
1. No fuel in hopper.
2. Firebox draft may be too low for sensing switch in
feeder circuit to operate. check for closed doors,
loose or missing gasket on doors or hopper lid.
3. Hopper lid must contact the lid position switch.
4. Feed motor will not run until the ESP control senses
a certain temperature. Maybe you did not put enough
fuel or starting gel in the burn pot before manually
lighting the fire.
5. Restriction in the hopper or feeder. Remove all fuel
and examine. Clear the obstruction.
6. Feed motor has failed.
PartiallY burned PelletS
1. Feed rate too high.
2. Poor air to fuel mixture. (Check burn pot clean-out
cover and air intake).
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 combus-
tion. The circuit board has the ability to track the
combustion through feed settings and ESP tempera-
tures. 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 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. Fuel restrictions as noted above.
SMOke SMell
Seal the vent pipe joints and connection to stove
with silicone. The exhaust vent is the only part of the
system that is under positive pressure.
Fire haS gOne Out- check for status light.
1. No fuel in hopper.
2. Draft is too low, blocked flue.
3. Something is restricting fuel flow.
4. Hopper lid not closed properly.
5. Feed motor or combustion blower has failed.
trouble-Shooting
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 stove is not burning, take the oppor-
tunity to scrape the burn pot to remove carbon buildup.
A vacuum cleaner is handy to remove the residue. be
sure the stove 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
Turn the Temp Dial to number 1 approximately 30
minutes before removing ashes. This will result in a
cooler stove and ash pan.
Maximum Feed Adjuster settings are not needed in
most cases. Operating in the normal range (#4) is recom-
mended when maximum heat output is not required. The
ESP probe prevents the stove from being over-fired.
Keep the stove free of dust and dirt.
See page 3 for detailed fuel information.
Wood Pellet size is regulated at .23" to .35" in diam-
eter with a maximum length of 1.5" long.
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.
The XXV is capable of burning all 3 categories of pel-
lets or a mixture of up to 50% shelled corn and pellets.
It should be noted, fuels with higher ash content will
require more frequent; ash removal, scraping of the burn
pot, increased cleaning frequency and may provide less
BTU's per pound.
The moisture content of pellets must not exceed 8%,
and Corn 15%. Higher moisture will rob BTU's and may
not burn properly.
Fuel should not be stored within the stove installation
clearances or within the space required for charging and
ash removal. See Page 7.

helpful hints

Fuel

29
XXV Pellet Stove