Harman P43 User manual

R1
P43 Pellet Stove Owners Manual
SAVE THESE INSTRUCTIONS.
Installation & Operating Manual
R4
“Ce manuel est disponible en Français sur demande”
SAFETY NOTICE
PLEASE READ THIS ENTIRE MANUAL BEFORE YOU INSTALL AND USE YOUR NEW ROOM HEATER. FAILURE
TO FOLLOW INSTRUCTIONS MAY RESULT IN PROPERTY DAMAGE, BODILY INJURY, OR EVEN DEATH.
FOR USE IN THE U.S. AND CANADA. SUITABLE FOR INSTALLATION IN MOBILE HOMES.
IF THIS HARMAN STOVE IS NOT PROPERLY INSTALLED, A HOUSE FIRE MAY RESULT. FOR YOUR SAFETY, FOL-
LOW INSTALLATION DIRECTIONS.
CONTACT LOCAL BUILDING OR FIRE OFFICIALS ABOUT RESTRICTIONS AND INSTALLATION INSPECTION
REQUIREMENTS IN YOUR AREA.
CONTACT YOUR LOCAL AUTHORITY (SUCH AS MUNICIPAL BUILDING DEPARTMENT, FIRE DEPARTMENT, FIRE
PREVENTION BUREAU, ETC.) TO DETERMINE THE NEED FOR A PERMIT.
CETTE GUIDE D'UTILISATION EST DISPONIBLE EN FRANCAIS. CHEZ VOTRE CONCESSIONNAIRE DE HARMAN
HOME HEATING.
Manual Item# 3-90-04301

22 P43 Pellet Stove
Maintenance
Minimizing Creosote:
Whenever wood is burned slowly, the potential exists for creosote
to form in the venting. The chimney or venting system should be
inspected periodically throughout the heating season to determine if
acreosotebuilduphasocurred.Ifasignicantlayerofcreosotehas
accumulated (3mm or more), it should be removed to reduce the risk
ofachimneyre.Aprofessionalchimneysweepisrecommended,
since they would normally have the correct equipment to ensure
proper creosote removal.
If you experience a re in the venting system, turn the stove to
"OFF"toallowtheunittoshutdown.Calltheredepartment,andbe
sure everyone is out of the residence. Before re-using the appliance,
have the venting system thoroughly inspected and replace any
damaged components.
The glass in your Harman stove is a special ceramic glass.
DO NOT abuse the glass by striking or slamming the door.
NEVER burn the appliance if the door glass is cracked or broken.
Replace ONLY with Harman supplied glass.
Sootand/ory-ashmayaccumulateon
the viewing glass, and will ocassionally
need to be cleaned. Clean the glass
with a soft cloth and mild glass cleaner.
DO NOT clean the glass when hot,
and avoid the use of abrasive clean-
ers.
Glass replacement
Carefully remove all remaining glass
and gasket materials prior to replacing
the glass.
Laythedoorfacedownonaat
surface. Remove the glass retainers
and screws. Apply the gasket material
to the face of the new glass. Lay the
glass into the door, making sure that
the glass is contained within the chan-
nels and raised areas of the door itself.
Lay the glass retainers into position
and install the screws. Tighten each
screw evenly to avoid making any
stress points.
•
•
•
Retainers and screws Glass
Adhesive gasket
Door Frame

23
P43 Pellet Stove
Scraping the burn pot:
Whenever adding fuel to the hopper, take the time
and scrape the grate surface of the burnpot, using
the scraper tool provided. This can be done while a
reisburning.Wearingheatresistantgloves,open
the rebox door. Scrape any accumulated ashes
frominfrontofthere,intotheashpan.Now,scrape
underthere,inadownwarddirection,toloosenany
carbondeposits.Donotscrapethereoutofthe
pot. Whatever you loosen will be pushed out with
theowofnewfuelintothepot.(Fig.33)
Removing Ashes:
After approximately 1 ton of pellets has been
burned, it will be necessary to empty the ash pan.
Ashes should be placed in a metal container
with a tight tting lid. The closed container of
ashes should be placed on a noncombustible
oor or on the ground, well away from all com-
bustible materials, pending nal disposal. If
ashes are disposed of by burial in soil or other-
wise locally dispersed, they should be retained
in the closed container until all cinders have
thoroughly cooled.
It is recommended that the stove is cold and
shut down when removing the ash pan.
1. Lift the latch handle to open the ash door and
remove the ash pan. Use ash pan handle to carry
and dispose of ashes.
2. Slide the ash pan back into the stove and latch
the door by pushing down on the latch handle
when closed.
Cleaning:
The stove should be shut-down and thoroughly
cleaned after each ton of pellets consumed. The
cleanerthestove,themoreefcientitwillbe.
Note: Fuel with higher ash and/or moisture
content will require more frequent cleanings.
1. Shut down the stove and disconnect power cord
to insure that all motors are stopped.
2. Clean heat exchanger with scraper as shown in
g27.
3. Brush or scrape the inside of the stove to remove
yash.
4.Scrapeburnpotwithatendofscraperprovided
with the stove. Inspect the holes on the burnpot
surface. See Fig. 33.
5.Openburnpotclean-out.Cleanyashfromburn
pot and replace cover.
Scraper
Blower Cover
Latch
Blower
Wheel
Flue
Outlet
Heat Exchanger Fins
Fig 27
Maintenance
Combustion
Blower Cover
Blower Cover
Latch
Fig 26

24 P43 Pellet Stove
Exposed blower wheel
and ue opening, NOTE:
ESP probe is visible.
Blower cover
removed.
ESP
probe
6. Remove the ash pan and properly dispose of the
ashes.
7. Remove combustion blower cover by turning the
blower cover latch vertical, see Fig.26. Sliding the
cover out of the slot on the left.This will expose the
combustionblowerwheelandueoutlet,Fig.27.
8. Clean the combustion blower wheel with a brush and
a vacuum cleaner. Note: Do not use a household
vacuum to clean the stove. We recommend that
youuseashopvacuumthatisequippedwithane
dustltercalledaHEPAlteroravacuumspecially
made for ashes and soot. Using a vacuum which is
not equipped with a ne dust lter may clog and
disperse y ash and soot into the room.
NOTE: THE STOVE MUST BE COMPLETELY
OUT BEFORE YOU VACUUM THE STOVE. LIVE
PELLETS, IF SUCKED INTO THE VACUUM WILL
LIGHT THE VACUUM ON FIRE AND MAY ULTI-
MATELY CAUSE A HOUSE FIRE.
9.Useabrushtocleantheue,beingcarefulnotto
damagetheESPprobe,seeFig.30.Theuegoes
straight through into the vent pipe (Fig.27) therefore,
the vent pipe can also be cleaned, to some extent,
throughtheueoutlet.
10. Reinstall the blower cover and close the latch.
11. Slide the ash pan into stove and latch the door.
Fig. 30
Fig. 31
Fig. 33
Be careful not to
damage ESP probe
when cleaning with
brush.
Soot and Fly Ash
The products of combustion will contain small
particlesofyashwhichmustbe removedfrom the
inner walls of the stove and from the venting system
periodically.Removingyashandsootimprovesef-
ciency,insuresthattheueventingpassagewayisclear
and unobstructed. The stove should be cleaned after
each ton of pellets (50 bags) and the venting system
inspected and cleaned after each heating season.
Maintenance
Burn pot
Clean-out
plate
Latch "open "with blower
cover partly removed. Burn
pot clean-out is open.
Latch "closed "with blower
cover in place. Burn pot
clean-out is closed.
Fig. 29
Fig. 28
ESP
Probe

25
P43 Pellet Stove
Burn Pot Cleaning and Maintenance
1. Scrape the top holed surface and sides of the burn
pot.(Fig 33) It is not necessary to completely remove all
material from the burn pot. The excess will be pushed
out during the next use.
2. Loosen the (2) wing thumb screws on the lower front
angle of the burn pot. (Fig. 34)
3. Lift off the clean-out cover (Fig.35) to open the bottom
clean-out chamber. (Fig.36)
4. Clean ash buildup from inside the chamber while
cover is off. Use the scraper to tap on the top front
edge of the burn pot. This will help knock pieces of
ash, loosened by the scraping process, down through
the holes. It also helps knock scale off of the igniter
element.
Figure 36
The igniter is made to be removable for service
by insulated male/female wire connectors. These
connections between the hot leads (the wires inside
the burn pot) and the cold leads (the wires from the
control board) are always pulled to the rear of the
feeder body. (Not coiled inside the burn pot.)
It is very important that these connections are
to the inside rear of the feeder body. Also, the extra
wire of the igniter wire service loop must be pulled out
through the rear of the feeder and tied up so that it will
not be damaged by any moving parts.
WARNING
Use caution when cleaning burn pot clean-out
chamber. Do not damage the high temperature
igniter wires.
Fig. 36
DANGER
Disconnect the power to the unit before
removing cover.
Burn pot igniter
Igniter hot lead wires
(high temperature)
Viewed from below through the ash pan opening.
Note: The hot lead/cold lead connection
must always be pulled to the rear of the
feeder body before operation.
P43 Maintenance - Burn Pot
Fig. 34
Loosen wing screws
Fig. 35

26 P43 Pellet Stove
P43 Maintenance - Cleaning the Feeder Body
Pelletnesmayaccumulateinthefeederbodyover
a period of time; therefore, a yearly inspection and
cleaning of this area must be performed.
Tocleanoutnes:
1. Remove the rear cover panels.
2. Remove wing nut and feeder cover on the
side of the feeder.
3.Useavacuumcleanertoremoveallnes.
4. Reinstall feed cover, wing nut, and rear
cover panels.
5/16" Hex Head
Screws (2 on
each side)
5/16" Hex Head
Screws (2 on
each side)
Safety Features
The low draft sensor which is a vacuum differential switch, monitors the negative
pressure(draft)inthereboxthroughaportontherearofthefeeder.Poordraftwill
result in an interruption of power to the feeder and the igniter. Poor draft can be caused
by blockage in the exhaust, excessive build-up on the combustion blower fan blades, a
failedcombustionblower,oradoororotheropeningtothereboxnotsealedproperly.
The hopper lid position switch, located in the right rear corner of the hopper opening, will
also interrupt power to the feeder and igniter if the hopper lid is not closed properly. The
circuit board is monitoring the position of these switches. During a feed cycle, if either
of these switches were to open, the feed motor light on the control will stay illuminated
with the power being interrupted by the switch. If the switch opens when the cycle is at
rest, the power lights for the feed motor or igniter will not illuminate. Be sure all doors,
including the hopper lid, are securely closed when operating the appliance.
Fig.
Pellet Fines may
build up in this area
Low
Draft
Sensor
Air
Intake
Flapper
Hopper Lid
Position Switch

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P43 Pellet Stove
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.
P43 Trouble-Shooting
Cleaning Burn Pot
Whenever your stove is not burning, take the op-
portunity 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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.
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 recommended when maximum heat output is not
required. The ESP control prevents the stove from
beingover-red.
Keep the stove free of dust and dirt.
Helpful Hints
Fuel
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re.
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 tem-
peratures. 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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. 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ue.
3.Somethingisrestrictingfuelow.
4. Hopper lid not closed properly.
5. Feed motor or combustion blower has failed.
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 P43 is capable of burning all 3 categories
of pellets due to a patented feeder and burn pot sys-
tem.
It should be noted, however, that higher ash
content will require more frequent ash removal, scrap-
ing 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 the P43.
The moisture content of pellets must not exceed
8%. Higher moisture will rob BTU's and may not burn
properly.
Pellet fuel should not be stored within the stove
installation clearances or within the space required for
charging and ash removal. See Page 7.