Installation & Operating Manual
P68 Pellet Stove Owners Manual
R3
“Ce manuelest disponibleen Françaissur demande”
SAFETY NOTICE
PLEASE READTHIS ENTIRE MANUALBEFOREYOU INSTALLAND USEYOUR NEW ROOM HEATER. FAILURE
TO FOLLOW INSTRUCTIONS MAY RESULT IN PROPERTYDAMAGE, BODILYINJURY, 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 MAYRESULT. FOR YOUR SAFETY,
FOLLOWINSTALLATIONDIRECTIONS.
CONTACT LOCAL BUILDING OR FIRE OFFICIALSABOUT RESTRICTIONSAND INSTALLATION INSPECTION
REQUIREMENTS INYOUR AREA.
CONTACT YOUR LOCAL AUTHORITY (SUCH AS MUNICIPAL BUILDING DEPARTMENT, FIRE DEPARTMENT,
FIREPREVENTION BUREAU, ETC.) TODETERMINE THE NEED FORA PERMIT.
CETTE GUIDED'UTILISATION ESTDISPONIBLE ENFRANCAIS. CHEZVOTRE CONCESSIONNAIRE DE HARMAN
STOVE COMPANY.
SAVETHESEINSTRUCTIONS.
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Introduction
The Award-Winning P68 Pellet Stove has the widest BTU range available, giving you 0 to 68,000 BTU when
you need it, automatically. The only thing you need to do is set your desired room temperature and fill the
hopper. With the P68 you will notice even heat throughout your home and a level of convenience you never
thought possible.
The P68 epitomizes the capability of Harman Pellet Stoves, taking advantage of Harman’s 20 years of
pellet stove design, technologyand manufacturing. This 68,000 BTU stove has the highest output, smartest
controls, widest heating range, and minimal maintenance. The P68’s huge output is managed by a
microprocessor that senses the room temperature and the fire temperature with tiny thermistor probes
and then determines the best feed rate. This improved and smarter control also has a diagnostic port for
connecting an external display showing live working data for easier troubleshooting.
The platinum combination is Harman’s Patented Feeder & Burn Pot, and ESP Control which have been
developed to their highest state. These features work together to allow amazing heat output with different
fuel quality, ash content and moisture.
Table of Contents
Assembly& Installation
4
Installation
5
Venting
6
Automatic Operation
Manual Operation
ESP Control
13
16
18
19
20
21
26
27
27
28
29
30
31
Serial#:
This label is located on the back of the unit.
Please copy the Serial Number for future reference.
Low Draft VoltageAdjustment
Room Sensor
Maintenance
TroubleShooting
Feeder Parts
Specifications
Options
Please read this entiremanual before youinstall
anduseyour new room heater. Failure tofollow
instructions mayresultinproperty damage,bodily
injury, or even death.
WiringDiagram
Parts List
Harman Stove Company
352 Mountain House Road
Halifax, PA 17032
Warranty
3
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IMPORTANT NOTES
WARNING
DO NOT INSTALL IN SLEEPING ROOM
DO NOT INSTALL A FLUE DAMPER IN THE
EXHAUST VENTING SYSTEM OF THIS
UNIT.
CAUTION
THE STRUCTURAL INTEGRITY OF THE
MOBILE HOME FLOOR, WALL, AND
CEILING/ROOF MUST BE MAINTAINED.
DO NOT CONNECT THIS UNIT TO A
CHIMNEY FLUE SERVING ANOTHER
APPLIANCE.
Mobile home installation should be done in
accordance with the Manufactured Home
and Safety Standard (HUD), CFR 3280,
Part 24.
CAUTION
KEEP COMBUSTIBLE MATERIALS (SUCH
AS GRASS, LEAVES, ETC.)AT LEAST 3 FEET
AWAY FROM THE FLUE OUTLET ON THE
OUTSIDE OF THE BUILDING.
4
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Assembly and Installation
Unpacking
The P68 is bolted (1/4 x 1" hex head bolts) to the
skid to prevent movement during shipping.
To free the stove from the skid you must remove
the hold-downbolts inthe rear of thepedestal base.
Installing rear cover panels
The rear coverpanels are removedfromthe stove
to make it easier to get at the hold-down bolts.
The rear coverpanels arepackedinsidethe hopper
and should be installed on the stove as shown. It
is recommended that the rear covers are installed
after the unit is in place and the vent pipe is
installed.
Firebrick
Install the firebrick vertically on the angle bracket
above the burnpot.
Flame Guide
Install the cast iron flame guide on top of the burn
pot. Make sure that the flame guide is fully seated
on the vertical sides of the burn pot and that the
back of the guide rests against the body of the
stove.
INSTALL EXHAUST VENT AT CLEARANCES
SPECIFIED BY THE MANUFACTURER. Most
pellet pipes require a minimum of 3" of clearance
to combustible materials.
Fig. 1
Shipping Bolts
Note: These same holes
are used for securing the
stove in mobile home
installation.
Rear Cover
Panels
Door Handle Installation
WoodHandle
3-40-00123
8mm Spring Washer
3-31-08558
SHCS 1/4-20 x 2-1/4
3-30-3025202252
Fig. 2
2. Install springwasher andwood handle onto socket
head cap screw as shown in fig. 2 and thread onto
latch on front door.
1. Remove wood handle ( P.N. 4-30-00123 ), 6mm
springwasher ( P.N. 3-31-08558 ) and socket head
capscrew¼-20 x 2-1/4" ( P.N. 3-30-3025202252 )
from hardware pack.
3. Tighten using a 3/16" hex key wrench.
5
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Installation
Installing
Place the stove on a noncombustible floor pro-
tector that extends a minimum of 6 inches to the front,
2 inches to the sides and flush with the rear of the
hopper. See Fig. 6.The minimum floor protector ma-
terial is 20 gauge sheet metal. Other floor protector
materials are ceramic tile, stone, brick, etc.
Place the stove away from combustible walls at
least as far as shown in Figures 3,4 and 5. Please
note the difference in side wall clearance with and
without side shields.
Note that the clearances shown are minimum
for safety but do not leave much room for access
when cleaning or servicing. Please take this into ac-
count when placing the stove.
9"-13"
9"-13"
9" With Side Shields
13" Without Side Shields
Fig. 3
Connect the power cord to a 120 V.A.C. 60Hz
grounded receptacle. (A surge protector is recom-
mended to protect the circuit board.) If the voltage
entering your home is below 116 volts your stove may
not work properly. Also be sure that the polarity of
the outlet that the stove is plugged into is correct.
Prior to installing the flue pipe, connect a draft
meter. (The draft meter must have a minimum range
of 0-.5.)Record the first reading. Connect flue pipe
to stove and be sure all doors and windows in the
home are closed. Record the second draft read-
ing_______. If the second reading is more than .05"
lower than the first reading, check for possible re-
strictions or the need for outside air (see page 8).
For more information on the draft test procedure, re-
fer to Page 19.
2"
14"
Fig. 4
2"
Mobile Home Installation
When installing this unit in a mobile home sev-
eral requirements must be followed:
1. The unit must be bolted to the floor. This can
be done with 1/4" lag screws through the 2 holes in
the base plate.
2. The unit must also be connected to outside
air. See page 8.
20"
3. Floor protection and clearances must be fol-
lowed as shown.
4. Unit must be grounded to the metal frame of
the mobile home.
CAUTION: This appliance must be vented to the
outside.
Due to high temperatures, the stove should be
placed out of traffic and away from furniture and drap-
eries.
Children and adults should be alerted to the haz-
ards of high surface temperatures and should stay
away to avoid burns to skin and/or clothing.
Young children should be carefully supervised
when they are in the same room as the stove.
Clothing and other flammable materials should
not be placed on or near this unit.
Fig. 5
Floor Protection must be 2 inches to each side, 6
inches to the front, and 0 inches to the back of the
stove.Floor Protector minimum: 25" widex 33" deep.
25" minimum
0"
(even with
hopper)
2"
2"
Installation and repair of this Harman stove should
be done by a qualified service person. We recommend
that the stove be inspected before use and at least
annually by a qualified service person. Periodic clean-
ing is required throughout the heating season and at
the end of each winter for the stove to work efficiently.
See cleaning instructions on page 21.
6"
Fig. 6
6
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Venting
Requirements for Terminating the Venting
WARNING: Venting terminals must not be re-
cessed into a wall or siding.
NOTE: Only PL vent pipe wall pass-throughs
and fire stops should be used when venting through
combustible materials.
NOTE: Always take into consideration the ef-
fects of the prevailing wind direction or other wind
currents that may cause flyash and/or smoke when
placing the termination vent.
In addition, thefollowing must be observed:
A. The clearance above grade must be a mini-
mum of 18".1
B. The clearance to a window or door that may
be opened must be a minimum of 48" to the side,
48" below the window/door, and 12" above the win-
dow/door.1
I. The clearance to service regulator vent outlet
must be a minimum of 6 feet.
1
J. The clearance to a non-mechanical air sup-
ply inlet to the building or the combustion air inlet to
1
any other appliance must be a minimum of 48”.
K. The clearance to a mechanical air supply
1
inlet must be a minimum of 10 feet.
(with outside air installed, 6 feet )
L. The clearance above a paved sidewalk or a
paved driveway located on public property must be
a minimum of 7 feet.1,2
M. The clearance under a veranda, porch,deck
1,3
or balcony must be a minimum of 12 inches.
NOTE: The clearance to vegetation and other
exterior combustibles such as mulch is 36” as mea-
sured from the center of the outlet or cap. This 36”
radius continues to grade or a minimum of 7 feet
below the outlet.
( with outside air installed, 18”)
C. A 12" clearance to a permanently closed
window is recommended to prevent condensation
on the window.
D. The vertical clearance to a ventilated soffit
located above the terminal within a horizontal dis-
tance of 2 feet (60 cm) from the center-line of the
terminal must be a minimum of 18".
E. The clearance to an unventilated soffit must
be a minimum of 12".
1CertainCanadian andor Local codes or regu-
lations may require different clearances.
2Avent shallnot terminate directly above a side-
walk or paved driveway which is located between
two single family dwellings and serves both dwell-
ings.
3Only permitted if veranda, porch, deck, or bal-
cony is fully open on a minimum of 2 sides beneath
the floor.
F. The clearance to an outside corner is 11"
from center of pipe.
NOTE: Where passage through a w all, or
partition of combustible construction is desired,
the installation shall conformto CAN/CSA-B365.
(if in Canada)
G. The clearance to an inside corner is 12".
H. Avent must not be installed within 3 feet (90
cm) above a gas meter/regulator assembly when
measured fromthe horizontalcenter-line of the regu-
lator.1
Inside Corner
Detail
Fixed
Closed
Fixed
Closed
Openable
Openable
= Vent terminal
= Air supply inlet
= Area where terminal is not permitted
V
A
7
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Venting
IMPORTANT NOTICE
Pellet Vent Pipe or PLVent Pipe MustBe Used.
Venting
Acombustion blower is usedto extractthe com-
bustion gases from the firebox. This causes a nega-
tive pressure in the firebox and a positive pressure
in the venting system as shown in Fig. 7. The longer
the vent pipe and more elbows used in the system,
the greater the flow resistance. Because of these
facts we recommend using as few elbows as pos-
sible and 15 feet or less of vent pipe. The maximum
horizontal run should not exceed 48". If more than
15 feetof pipe is needed,the interior diameter should
be increased from 3" to 4" because a larger pipe
causes less flow resistance. Be sure to use ap-
proved pellet vent pipe wall and ceiling pass-
through fittings to go through combustible walls
and ceilings. The use of a starting collar is not al-
ways necessary. The first piece of pipe should be
fastened securely with at least 2 fasteners to the
flue collar of the stove. If a starting collar is used to
attach the venting system to the stove,the starting
collar must be sealed to the stove with high temp
silicone caulking.
+
-
Vent Pipe
Pellet venting pipe ( also known as PL vent )
is constructed of two layers with air space between
the layers. This air space acts as an insulator and
reduces the outside surface temperature to allow a
clearance to combustibles of only 3 inches. The
sections of pipe lock together to forman air tight seal
in most cases. However, in some cases a perfect
seal is not achieved. For this reason and the fact
that the P68 operates with a positive vent pressure
we specify that the joints also be sealed with
silicone. Aluminum tape can also be used for any
joint that is 1 ft. or more from the outlet of the stove.
+
+
= Positive Static Pressure
- = NegativeStatic Pressure
Fig. 7
We cannot emphasize enough, the
importance of sealing every seam and joint in the
venting system which is inside the home. Even the
smallest pin hole can leak and when it does you will
smell wood smoke or a creosote smell in the room.
If this occurs check for leaks. Leaks are easiest to
see during start-up. Alternatively you can use a
smoke pellet to leak test the venting before lighting
your first fire.
8
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Venting
OutsideAir
Here are four benefits of outside air:
Outside airflex pipe
goes here.
1. Having air introduced from outside the living area
boosts overall efficiency.
2. It eliminates draft problems that can occur in tight
homes.
3. It reduces smoke spillage in the event of a power
failure.
4. It allows your vent termination to be as close as
18" from windows or doors.
Flex pipe part#
2-00-08543 (3')
1-00-08543(25')
Outside air is optional except in mobile
homes and where building codes require. The
benefit of outside air is mainly noticed in small, very
tight, houses.
InletCover part#
1-10-08542
To installoutside air use 2 3/8" I.D. non-com-
bustible flex pipe. There is a break-away hole on the
rear panel of the P68 stove which must be removed
before connecting the flex pipe. The pipe should be
run outside and terminate to the side or below the
vent pipe outlet so the flue outlet is more than 12"
from the inlet cover. The maximum length run of this
pipe is 15 feet. If a longer run is needed the size
must be increased to 3". Inlet cover part number 1-
10-08542 should be used to keep birds, rodents,
etc.out of the pipe.
HRV
Wheninstalling ina house with a Heat Reclaim-
ing Ventilation System (HRV) be sure the system is
balanced and is not creating a negative pressure in
the house.
9
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Venting
#1 Preferred method
This method provides excellent venting for nor-
mal operation and allows the stove to be installed
closest to the wall. Two inches from the wall is safe;
however, four inches allows better access to remove
the rear panel. The vertical portionof the vent should
be three to five feet high. This vertical section will
help provide natural draft inthe event of a power fail-
ure. Note: Do not place joints within wall pass-
throughs.
3 ft.
to combustibles
Combustibles
allowed
beyond 3 ft.
Fig. 8
3 ft.
to combustibles
#2 Preferred method
This method also provides excellent venting for
normaloperation butrequires the stove tobe installed
farther from the wall. The vertical portion of the vent
should be three to five feet high and at least three
inches from a combustible wall. This vertical sec-
tion will provide natural draft in the event of a power
failure.
If the stove is installed below grade be sure the
vent termination is at least 18" above grade. The
outlet must also be 1 foot from the house/building.
Note: Do not place joints within wall pass-
throughs.
3 ft.
to combustibles
Combustibles
allowed
beyond 3 ft.
CAUTION
Keep combustible materials (such as grass,
leaves, etc.) at least 3 feet away from the flue
outlet on the outside of the building.
12" min. wall to outlet
3 ft.
Fig. 9
to combustibles
36" min
clearance to any
combustible
material
10
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Venting
#4 Installing into an existing
chimney ( US only )
This method provides excellent venting for nor-
mal operation. This method also provides natural
draft in the event of a power failure. If the chimney
condition is questionable* you may want to install a
liner as in method #7.
*The chimney should be inspected and cleaned
before installing your stove. If you discover that the
chimney does not have a clay tile liner or has cracks
or flaking of the tile liner you will need to install a
stainless steel liner within the chimney. In most
cases the inside diameter of this liner should be 4".
Either flexible or rigid liner may be used for this
purpose. Refer to Method 6 & 7.
Be sure to design the venting so that it can be easily
cleaned.
Fig. 10
#5 Installing into an existing
fireplace chimney ( US only )
This method provides excellent venting for nor-
mal operation. This method also provides natural
draft in the event of a power failure. If the chimney
condition is questionable* you may want to install a
liner as in method #6.
*The chimney should be inspected and cleaned
before installing your stove. If you discover that the
chimney does not have a clay tile liner or has cracks
or flaking of the tile liner you will need to install a
stainless steel liner within the chimney. In most
cases the inside diameter of this liner should be 4".
Either flexible or rigid liner may be used for this
purpose. Refer to Fig. 6 & 7.
The chimney should be sealed at the damper
using a steel plate, or with insulation at the first flue
tile. In both cases the connector pipe should extend
through the smoke chamber to the base or into the
first flue tile.
Be sure to design the venting so that it can be
easily cleaned.
Fig. 11
11
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Venting
#6 Installing into an existing
fireplace chimney ( US and Canada)
This method provides excellent venting for nor-
mal operation.This methodalso providesnaturaldraft
in the event of a power failure.
In Canada and some places in the US it is re-
quired that the vent pipe extend all the way to the top
of the chimney.
In this method a cap should also be installed on
the chimney to keepoutrain. Besure to use approved
pellet vent pipe fittings. Seal pipe joints with silicone
or aluminum tape in addition to the sealing system
used by the manufacturer. Pipe size should be in-
creased to 4" using this method.
Fig. 12
#7 Installing into an existing
chimney ( US and Canada )
This method provides excellent venting for nor-
mal operation. This method also provides natural
draft in the event of a power failure.
In Canada and some places in the US it is re-
quired that the vent pipe extend all the way to the top
of the chimney. The pipe or liner inside the chimney
should be 4"diameter.
In this method a cap should also be installed
on the chimney to keep out rain.
12
Fig. 13
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Venting
Storm collar
Flashing
12" min.
3" min.
3" min.
3" min.
PL vent manufacturer's
firestop spacer and
support
No insulation or
other combustible
Minimum flue vent
configuration
It is recommended that outside
air be installed with this venting
configuration to reduce smoke
and creosote smell in the room
in the event of power failure.
materials
are
allowed within3" of
the PL vent pipe.
3" min.
(See Page 5 for
cornerinstallation
clearances)
Fig. 14
#8 Installing through the ceiling
Through the ceiling vent, follow PLvent
manufacturers recommendations when using wall
and ceilingpass through.Note: Do not place joints
within wall pass-throughs.
Fig. 15
12" min. wall to outlet
36" min clearance to any
combustible material
Fig. 16
13
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P68 AUTOMATIC IGNITION/OPERATION
The P68 is a fully automatic stove that features
Room Temperature Mode
two operating modes; Stove Temperature Mode and
Room Temperature Mode. In Stove Temperature Mode,
you select a burn rate and the stove will remain at the
same burn rate regardless of the room temperature.
In the Room Temperature Mode the stove
constantly monitors the temperature in the room and
adjusts the size of the fire and the heat output of the stove
so that the room is kept at a constant temperature. Room
mode, in the AUTO position, has the added advantage of
turning the stove off if no heat is required and turning the
stove on again when the room temperature drops below
your desired room temperature.
Room Temperature Mode
Most consumers use the stove in the Room
Temperature Mode because it is the easiest and most
efficient method of keeping the room at a given
temperature. In the Room Temperature Mode, the Room
Sensing Probe constantly monitors room temperature. As
the weather changes outside andyour home needs varying
amounts of heat to be at a desired temperature, the stove
will automatically increase size and heat output of the fire
so that a constant even temperature is maintained. If the
weather warms up and no heat is required the stove will
gradually shut down. When the house cools down the
stove will automatically bring the room temperature to the
precise temperature you desire.
In the Room Temperature Mode you can select
either Auto or Manual modes for the igniter using the
igniter toggle switch. When the toggle switch is in the
Auto position the igniter locatedinside the burn potis ready
to automatically light the fire when required. When the
toggle switch set to the Manual position the stove can be
lit manually with either a gel or a wax type fire starter. (see
lighting instructions on page 17.) With the igniter toggle
switch setin the Manual positionthe stove will automatically
adjust heat output, but the stove will not automatically shut
down if no heat is required. Instead it will go to its lowest
setting and remain there. The Manual position on the
igniter toggle switch lets you light the stove manually,
should the igniter fail for any reason. Secondly if you are
using the Harman battery back up system the Manual
setting will prevent the stove from turning off and on during
a power failure, which would drain the back up battery,
and possibly cause damage to the back-up or the stove.
Room Temperature Mode: This setting, see above, will
producearoomtemperatureof 70degrees withthedistribution
blower at medium speed.
In the Room Temperature Mode, the distribution
blower speed can be increased or decreased by adjusting
the Room Temp/Off/Stove Temp dial between L and H. As
output of the stove increases, the speed of the blower will
increase automatically to insure that more heat is
transferred out into the room. The distribution blower will
shut off as the room reaches the set temperature, this will
prevent overheating of the room.
14
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P68 AUTOMATIC IGNITION/OPERATION
Stove Temperature Mode
Shut Down Procedure
In the Stove Temperature Mode and with the igniter
toggle switch in the Auto position, the stove will light
automatically and can be adjusted to the desired setting
using the same temperature control dial as is used in
the Room Temperature Mode. The heat output and fuel
consumption will remain constant regardless of room
temperature. The settings from 1 to 7 on the inner ring
of the dial provide for relative heat output settings with 1
being low and 7 being the maximum.
The best way to shut down the stove is simply let it run
out of pellets, the stove will shut down automatically.
Alternatively, you can turn the Mode Selector to “off”.
This will cause the fire to gradually die down and go
out. The fire will not go out immediately and may take
more than an hour to fully shut down.
If the stove is left to run out of fuel, you may get a 6 blink
status light. If this happens simply reset the control
board by turning the mode selector to OFF and back
ON.
In Stove Temperature Mode the stove will not
automatically shut off unless the stove runs out of fuel
or is turned off.
Never pull the plug to shut down the stove. This will
stop the combustion blower and smoke will escape
through window and door gaskets.
When the igniter toggle switch is set to manual in this
mode, the distribution blower will not turn on with a
temperature dial setting from 1 to 5. The advantage of
this mode is to allowthe operator to have a large viewing
fire without blowing extra heat into the room.
Stove Temperature Mode
During operation, with the temperature dial set at
#5 or less, the distribution fan will not operate. A #5 on
the temperature dial and a #5 on the feed adjuster is
approximately 80% output. It is not necessary to oper-
ate the distribution blower below this point. Therefore,
the control allows a higher burn rate ( a larger viewing
fire) without an excess of hot air blowing into the room.
An example of when to use the Manual Stove Tem-
perature Mode is if you want to watch a large fire and
the room is already up to temperature. The Stove Tem-
perature Mode allows you to have a larger fire and a
lower sound level, without the distribution blower.
NOTE: During the useof this mode, if you keep
increasing the temperature dial setting to increase
the fire size, the distribution blower will automati-
cally come on when the ESP Temperature reaches
350o F, or 81%output.
This setting,see below,will producecontinuous medium
heat outputwith the distribution blowerat low speed.
Feed Adjuster Knob
For most premium grade pellet fuels the Feed Adjuster
Knob should be set at 4. If higher ash fuels are used
the setting should be increased to 5 or 6. Also higher
settings are required if you would like to get the
maximum heat output from the stove. At the maximum
burn rate (with the temperature dial on 7/90° and the
feed adjuster at 6) there should be 1" or more of ash on
the front of the burn pot. If there is less than 1" of ash,
turn the feed adjuster knob down to a lower setting.
This setting, see below, will produce continuous
maximum heatoutput with the distribution blower atfull
speed.
15
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P68 AUTOMATIC START UP
Starting First Fire
Igniter Switch to"AUTO"(up position)
Make sure the unit is plugged into a 120 VAC, 60
HZ electrical source. Thepower light should bethe
onlylight lit.
See Note 7.
1"
NOTICE:
Fig. 17
Flame Guide
When poweris given to the stove, the control
board will blink a few times to indicatecurrent
versionof control board.
1. Turn Mode Selector to "OFF".
2. Fill hopper with pellets.1
3. Clean burn pot with scraper, if necessary.5
Fig. 18
4. If starting after an empty hopper, turn Feed
Adjuster to "TEST" (forone60 secondcycle).2 This
will purge pellets into the auger tube and also allow
youto check the motors foroperation.
Helpful Hints
1.Fines are small pieces ofbroken pellets (sawdust). Finesdo not
flow easily and often build upon the hopper funnelbottom angles.
You can push these fines into the feeder opening and then fill the
hopper with pellets.As the system works, they will be burned. Or
you can clean them out before filling the hopper.
2. The "TEST" cycle will operate the feeder motor forexactly one
minute. Turning to "TEST" again and again may purge too much
fuel into the burn potcausing excessive smoke on start-up.
3.Thefirebox low pressure switch will notallow theauger motoror
the igniter elementto operate if the view door orthe ash pan door
are open.
NOTE: The auger motor will not operate with
3
the view door or ash pan door open.
5. Turn Feed Adjuster to #4.4
6. Flip the Igniter Switch up into the "AUTO"
position.
4.Adjust Feed Rate.If this isyour first fire or youare trying different 7. Turn the Temperature Dial to desired room
pellets, setthe feed adjuster to#4, Fig. 17. This is a conservative
number andwill probably need to be increased. Afteryou know a
feed rate setting that works well, use that setting. Remember, if
temperature.
8. Turn Mode Selector to Room Temperature or
your feed rate is too high you may waste fuel.
StoveTemperature.
5. This is usually a weekly maintenance procedure. Cleaning the
burn pot with the scraper with a small amount of new fuel in the
bottom is nota problem. First, scrape the ashes on the frontof the
burn pot intothe ash pan. Then,scrape the top surface of the burn
pot downward into the base of the burn pot. When the stove is
ignited these scrapings will be pushed out by the feeder and
burned.
6. The ash pan can hold the ashes from approximately 1 ton of
premium fuel.This means the asheswill only need to be emptied
a few times a year.
9. Fill hopper with pellets and remove ashes as
required.6
WARNING
"NEVER USE GASOLINE, GASOLINE-TYPE LANTERN
FUEL, KEROSENE, CHARCOAL LIGHTER FLUID, OR
SIMILAR LIQUIDS TO START OR "FRESHEN UP " A
FIRE IN THIS HEATER. KEEP ALL SUCH LIQUIDS
WELL AWAYFROM THE HEATER WHILE INUSE".
7. Setting the feed adjuster # for maximum burn: With the unit
burning in "AUTO",turn to "Stove Mode"and putthe fan on "H". Set
the Temperature Dial to #7. Allow the unit to burn for about 30
minutes and check ash on front ofburn pot. Fig. 18. Ifthe ash line
is larger than 1", turn the feed adjuster from #4 to#5. Allow another
30 minutes of burn time and check again.If , at #6 setting, a 1" or
less ash bed is notobtainable, itis not a problem. The 1" ash bed
is only a maximum burn rate and at most normal settings the ash
bed will be larger.
WARNING
ONLY USE WOOD PELLET FUEL. DO NOT BURN
GARBAGE IN STOVE.
16
P68 Pellet Stove
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P68 MANUAL IGNITION/OPERATION
The P68 Pellet Stove is capable of manual operation. This also allows the
operator to manuallycontrol operation during an emergency (i.e. igniter failure, when
using a 502H battery backup, or when using certain generators.)
The unit can be switched between "AUTO" and "MANUAL" at any time during
operation.
NOTE: When starting the unit in the "AUTO"
mode and switching to "MANUAL", the fire must
Room Temperature Mode: This
be large enough to start the distribution blower.
The starting of the blower is a signal that the start
cycle is completed and the fire will not go out.
setting, see below, will produce a
room temperature of 70 degrees
with the distribution blower at
medium speed.
Igniter Switch to "MANUAL"
Room Temperature Mode
The fire will have to be lit with starting gel and a
match, or started automatically, see "Automatic Op-
eration" on Page 15. Turn to "Manual" position when
the fire is established.
The difference between "AUTO" Room Tempera-
ture Mode and "Manual" Room Temperature Mode is
that the fire will not go out as the room temperature
goes above the control board setting. The unit can only
go to low burn and will remain there until it runs out of
fuel or until more heat is needed and the feed rate in-
creases. Feed rate adjustments and dial settings are
thesame as"AUTO" settings.The blower will shutoff
completelyifthe temperatureontheESP is toolow.
Manual Stove Temperature Mode
Igniter Switch to "MANUAL"
Stove Temperature Mode
The advantage of this mode is to allowthe opera-
tor to have a large viewing fire without blowing extra
heat into the room.
During operation, with the temperature dial set at
#5 or less, the distribution fan will not operate. A #5 on
the temperature dial and a #5 on the feed adjuster is
approximately 80% output. It is not necessary to oper-
ate the distribution blower below this point. This con-
trol setting allows a higher burn rate (a larger viewing
fire) without an excess of hot air blowing into the room.
An example of whento use the ManualStove Tem-
perature Mode is if you want to watch a large fire and
the roomis already up to temperature. The Stove Tem-
perature Mode allows you to have a larger fire and a
lower sound level, without the distribution blower.
NOTE: During the use of this mode, if you
keep increasing the temperature dial setting to in-
crease the fire size, the distribution blower will
automaticallycome on when the ESP Temperature
reaches 350o F, or 81%output.
This setting willproduce a large viewing fire without
a distribution blower operating.
17
P68 Pellet Stove
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P68 MANUAL START UP
Starting First Fire
Igniter Switch to"MANUAL"
(down position)
Fig. 20
Makesurethe unitis pluggedinto a120VAC,
60 HZ electrical source. The power light should be
theonly lightlit.
Fig. 19
1. Turn FEED ADJUSTER to desired feed rate.
See Note 7.
1"
No. 4 is good for most pellets.4
2. Turn the MODE SELECTOR to “OFF” and
then to the desired mode. This will reset con-
trol andstart thecombustion motor.
3. Turn the TEMPERATURE DIAL to the desired
setting.
5
4. Clean burn pot with scraper if necessary.
5. Fill burn pot with pellets, only level with front
edge. (Do Not Over Fill).
Fig. 21
6. Add starting gel on top of the pellets.Stir gel
Helpful Hints
intopellets for fast lighting.
1.Fines are small pieces ofbroken pellets (sawdust). Finesdo not
flow easily and often build upon the hopper funnelbottom angles.
You can push these fines into the feeder opening and then fill the
hopper with pellets.As the system works, they will be burned. Or
you can clean them out before filling the hopper.As the system
works, they will be burned.
2. The "TEST" cycle will operate the feeder motor forexactly one
minute. Turning to "TEST" again and again may purge too much
fuel into the burn potcausing excessive smoke on start-up.
3.Thefirebox low pressure switch will notallow theauger motoror
the igniter elementto operate if the view door orthe ash pan door
are open.
7. Light starting gel with a match, and close the
door. Operation will beginwhenthe firereaches
the proper temperature.3
8. Fill hopper with pellets and remove ashes as
required.1, 6
4.Adjust Feed Rate.If this isyour first fire or youare trying different
pellets, setthe feed adjuster to#4, Fig. 19. This is a conservative
number andwill probably need to be increased. Afteryou know a
feed rate setting that works well, use that setting. Remember, if
your feed rate is too high you may waste fuel.
5. This is usually a weekly maintenance procedure. Cleaning the
burn pot with the scraper with a small amount of new fuel in the
bottom is nota problem. First, scrape the ashes on the frontof the
burn pot intothe ash pan. Then,scrape the top surface of the burn
pot downward into the base of the burn pot. When the stove is
ignited these scrapings will be pushed out by the feeder and
burned.
6. The ash pan can hold the ashes from approximately 1 ton of
premium fuel.This means the asheswill only need to be emptied
a few times a year.
7. Setting the feed adjuster # for maximum burn: With the unit
burning in "AUTO",turn to "Stove Mode"and putthe fan on "H". Set
the Temperature Dial to #7. Allow the unit to burn for about 30
minutes and check ash on front ofburn pot. Fig. 21. Ifthe ash line
is larger than 1", turn the feed adjuster from #3 to#4. Allow another
30 minutes of burn time and check again.If , at #6 setting, a 1" or
less ash bed is notobtainable, itis not a problem. The 1" ash bed
is only a maximum burn rate and at most normal settings the ash
WARNING
"NEVER USE GASOLINE, GASOLINE-TYPE LANTERN
FUEL, KEROSENE, CHARCOAL LIGHTER FLUID, OR
SIMILAR LIQUIDS TO START OR "FRESHEN UP " A
FIRE IN THIS HEATER. KEEP ALL SUCH LIQUIDS
WELL AWAYFROM THE HEATER WHILE INUSE".
WARNING
ONLY USE WOOD PELLET FUEL. DO NOT BURN
GARBAGE IN STOVE.
bed will be larger.
18
P68 Pellet Stove
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P68 AUTOMATIC IGNITION ESP CONTROL
Feed adjuster
Power Light
Sets the maximum
feed rate
Indicates power to the
control.
Test
Runsallmotorsatfull
speed forone minute
to check operation.
After twominutes the
stove will go to
minimum burn and
the blowers will
alternate fromhigh to
low every minute to
remind you that you
are still in "Test
Mode".
Status Light
Will be lit in either stove
orroom tempmode when
pointer is notwithin off
positionband except
after normalshutdown.
Blinks to indicate errors
listed below.
Indicates power to
distribution blower.
Igniter switch
Setto appropriate
Start-Up mode.
Indicates power to
combustion blower
Distribution Blower
speedadjustmentrange.
L = low
H = high
Indicates power to the
feed motor.
Variablespeedanywhere
between L and H;
although as the stove
temp. goesup ,so does
the lowend ofthe scale.
Indicates power to the
igniter
Mode Selector
Temp dial
Dealer Diagnostic Port
For dealer maintenance
only. RequiresspecialDDM
monitor suppliedto Harman
Dealers exclusively.
Allows you tochoose between
RoomTempMode,StoveTemp
Mode, or OFF. Alsoallows you
to vary the distribution blower
speed by turning the knob to
the high or low side of each
mode.
Allows you to adjustthe room temperature in Room
Temp Mode using the outerscale markedin degrees
Fahrenheit. It also allows you to adjustthe stove
temperature while in Stove Temp Mode usingthe inner
scale marked from 1 to 7.
Status light error messages:
1 Blink: Indicates control board self diagnostic fail-
ure. This requires a manual reset*.
3 Blinks: Indicates ESP (Exhaust Sensing Probe)
failure. This requires a manual reset*.
4 Blinks: Can occur only in Room Temp Mode and
indicates RoomSensingProbe failed ornot installed.
If a Room Sensing Probe is then installed, the sta-
tus light will automatically reset.
5 Blinks (In Igniter Auto. Mode Only): Indicates
that the unit has failed to light within the 36 minute
start cycle. To reset - Turn Mode Selector to "OFF",
then turn to either mode again.
6 Blinks : Indicates that the control has calculated
poor or incomplete combustion occurring for more
than 50 minutes.
A six blink status may be set if the stove is allowed
to run out of pellets. To reset, turn mode selector to
"OFF" then back on to the desired mode. If the unit
was not out of pellets, see Troubleshooting section,
Page 26, for more details.
* Manual reset- disconnect power cord for a few
seconds and reconnect. If error still occurs call your
Dealer.
19
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P68 Low Draft Voltage Adjustment
Co m b u s t i o n
Motor Speed
Control
Low draft only
set point.
Thesmall straight
screwdriverslotis
plastic;therefore,
the unit can be
adjusted while in
operation.
Draft Meter bolt
hole location
On a P68
the draft test hole is
under the left rear
corner
of
the
firebox.
Fig. 23
Fig.22
Fig.1
Low Draft Voltage Adjustment
These units are pre-tested at the factory with
exactly 120 Volts A.C., 60 Hz. They are checked and completingthe flue pipe installation. To recordthe results
A simple draft test should be performed after
adjusted for firebox tightness, gasket leakage, motor
operation and igniter operation. The P68 is then factory
set at a mid-point adjustment and in most cases will not
need any adjustments. NOTE: The factory low draft
setting may not be correct for the unit's permanent
installation conditions.
for future reference:
1. Plug unit into a 120VAC, 60 HZ outlet.
2. Close the hopper lid, front view door, and the ash
pan. Neither pellets or a fire are required for this test.
3. With the mode selector in the "OFF" position, turn
the feed adjuster to "TEST".
The control board on the P68 is equipped with a
low draft adjustment port. Located on the control face
just to the rightof the igniter light. This voltage adjustment
is provided to allow the unit to be adjusted for the
household voltage where the unit is going to be in
permanent operation. NOTE: The line voltage varies
from area to area and often home to home.
The low draft voltage should be adjusted to
achieve the most efficient burn on low burn or
"maintenance". This voltage adjustment allows the
installer to change the lowvoltage setpoint approximately
10 volts. This adjustment should be done by the installer
during set up because a draft meter reading isrequired
to insure proper set up.
4. Recordthe high draft_____in W.C. (Normalis -.50 to
-.60) The control will be on the High Draft for a total of 2
minutes.
5. After 2 minutes, the combustion motor will go down
to low draft and the distribution blower will go on high.
Allow approximately 15 seconds to pass for the
combustion motor to slow before checking the low draft.
6. If the low draft is between -.35 and -.45, record the
reading _____ in W.C. If the reading is higher, slowly
turn the set screw counter-clockwise until the draft
lowers. If the reading is lower, very slowly turn the set
screw clockwise until the draft increases.
NOTE: The test mode alternates from high to low
draft every 60 seconds. If more time is needed for
draft adjustment, wait until the next low draft cycle.
NOTE: In some cases, the draft may not go as low
as -.35 to -.45 even with the set screw completely
counter-clockwise, ideally, you should just set it as
low as possible.
If the unit is not adjusted properly, it does not
cause a safety concern. If the unit is adjusted too high,
only effiency is lost. If the unit is adjusted too low, the low
draft pressure switch will not allow the feed motor or the
igniter to operate.
20
P68 Pellet Stove
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Room Sensor and Rear Shield Installation
Rear Shields
Room Sensor Installation
Room
Sensor
Port
5/16" Hex Head
Screws (3 on
each side)
5/16" Hex Head
Screws (3 on
each side)
Fig. 24
Fig. 25
The room sensor is a small temperature sen-
sor on the end of a 60" gray wire. This sensor is
installed much like a standard wall thermostat. Be-
cause it is so small, it can be hidden along the trim
of a doorway or even up the leg of a coffee table.
There is a remote room sensor port on the rear of
the unit for easy external connection. Use standard
18-2 thermostat wire to extend the distance to the
desired location (100' maximum). The room sen-
sor shouldbe installedinthe location whereyou want
to control the temperature.
The rear insulated shields are split in the middle for
easy removal. Each shield has (3) 5/16" hex head
screws. Two (2) that only need to be loosened, and
one (1) thatneeds to be completely removed, to allow
the shield to slide away from the unit. NOTE: It is
not recommended that the unit be operated with
the shields removed, due to the hot and moving
parts which they protect.
In most installations locating the room sensor
behind the stove near the distribution fan works well
because the sensor monitors the room air being
drawn into the distribution fan.
NOTE: Distances of more than 25 feet from
the unit or in another room are not recommended.
The room sensor is essential for the P68's excel-
lent efficiency.
NOTE: It is recommended that the room
sensor be installed, even if only installed on the
rear of the unit as a return air sensor.
21
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Maintenance
Cleaning the Door Glass
• Always use a soft cloth and glass cleaner (such as Windex, or a mixture of vinegar & water) to clean the glass.
• Do not use razor blades or any other hard object to scrape the glass.
Removing Ashes:
When approximately 1 ton of pellets has been
burned it will be necessary to empty the ash pan.
Ashes should be placed in ametal container
with a tight fitting lid. The closed container of
ashes should be placed on a noncombustible
floor or on the ground, well away from all com-
bustible materials, pending final disposal. If
ashes are disposed of byburial 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 ash pan.
1. Pull on latch handle and remove ash pan. Use
BlowerCover
Latch
ash pan handle to carry and dispose of ashes.
2. Slide the ash pan back into the stove and latch
the door by pushing in on latch handle.
Combustion
BlowerCover
Fig 26
Cleaning:
The stove should be cleaned after burning ap-
proximately 1 ton of pellets (50 bags). The cleaner
the stove the more efficient it will be. You will burn
less pellets and heat output will be greater.
Note: Higher ash content pellets will require
more frequent cleanings.
HeatExchanger Fins
1. Shut down stove anddisconnect power cord to
insure that all motors are stopped.
2. Clean heat exchanger with scraper as shown in
fig 27.
Scraper
3. Brush or scrape the inside of the stove to remove
fly ash.
4. Scrape burnpot with flat end of scraper provided
with the stove. Inspect the holes on teh burnpot
surface. See Fig. 33.
Flue
Outlet
5. Open burn pot clean-out. Clean fly ash from burn
pot and replace cover.
Blower
Wheel
6. Remove ash pan.
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 flue outlet,
Fig.27.
BlowerCover
Latch
Fig 27
22
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Maintenance
Clean-outplate
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 fine dust
filter called a HEPA filter or a vacuum specially made
for fly ash and soot. USING A VACUUM WHICH IS
NOT EQUIPPED WITH AFINE DUST FILTER WILL
BLOW FLYASHAND SOOT OUT INTO THE ROOM.
NOTE: THE STOVE MUST BE COMPLETELY OUT
BEFORE YOU VACUUM THE STOVE. LIVE PEL-
LETS, IF SUCKED INTO THE VACUUMWILL LIGHT
THE VACUUM ON FIRE AND MAY ULTIMATELY
CAUSEAHOUSE FIRE.
Fig. 29
Fig. 28
Latch "open "with blower
cover partly removed. Burn
pot clean-outis open.
Latch "closed "with blower
cover in place. Burn pot
clean-outis closed.
9. Use a brush to clean the flue, being careful not to
damage the ESP probe, see Fig. 30. The flue goes
straight through into the vent pipe (Fig.27) therefore,
the vent pipe can also be cleaned to some extent
through the flue outlet.
10. Reinstall blower cover and relatch.
11.Slide ash pan into stove and latch the door.
ESP
probe
Blower cover
removed.
Brush not
supplied. Can be
found in
Fig. 30
Exposed blower wheel
andflueopening, NOTE:
ESP probe is visible.
hardware stores.
Fig. 32
Soot and FlyAsh
The products of combustion will con-
tain small particles of fly ash which must
be removed from the inner walls of the
stove and from the venting system peri-
odically. Removing fly ash and soot
improves efficiency, insures that the
flue venting passageway is clear and
unobstructed. The stove should be
cleanedafter eachton of pellets (50
bags) and the venting system
inspected andcleaned after
each heating season.
ESP
Probe
Be careful not to
damage ESP probe
whencleaning with
brush.
Fig. 31
Fig. 33
23
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P68 Maintenance - Burn Pot
Burn Pot Cleaning and Maintenance
1. Scrape the top holed surface and sides of the burn
pot.(Fig 34) It is not necessary to completely remove
all materialfrom the burnpot. The excess willbe pushed
out during the next use.
DANGER
Disconnect the power to the unit before
removing cover.
2. Loosen the (2) wing thumb screws on the lower
front angle of the burn pot. (Fig. 34)
3. Liftoff the clean-outcover (Fig.35)to openthe 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.
Fig. 34
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 inside 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.
Fig. 35
WARNING
Use caution when cleaning burn pot clean-out
chamber. Do not damage the high temperature
igniter wires.
Igniter hotlead wires
(high temperature)
Note:The hot lead/cold lead connection must
always be pulled to the rear of the feeder
body before operation.
Burn pot igniter
Viewed from below through the ash pan opening.
Fig. 36
24
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P68 Maintenance - Gasket Adjustment
Your new Harman Stove viewing door gasket
has been factory set, however over a period of time
some minor adjustment may be necessary. The
easiestway to checkthe adjustment of the door gasket
is to take a small piece of paper or a dollar bill (when
the stove is not burning) and open the door, place the
paper between the face of stove body and the gasket
at the top center of the door, close the door. You should
have a slight amount of resistance when you try to pull
the paperout. Repeatthis process on thebottom center
of the door. If the paper is loose then some adjustment
is necessary.
Bolts
To adjust the door, the stove must be turned
off and cold. Open the door, loosen the 2 bolts shown
(see Fig. 37) and bump the latch adjuster (Fig. 38)
towardthe backof stove, snug bolts and testfor proper
seal as described above. Once the proper seal is
attained, open the door and finish tightening the bolts.
If proper adjustment cannot be accomplished, then a
new gasket should be installed.
Over a period of time the gasket will wear out
and a new gasket will have to be installed. To install a
new gasket you must remove the old gasket. After the
gasket is removed the gasket channel should be free
of all loose particles. The gasket cement used to hold
the gasket in place is RTV (HIGH TEMPERATURE)
silicone. Put a bead of RTV silicone in the bottom of
the gasket channel, then install the new gasket and
close the door. Allow to dry for several hours before
lighting the stove. After the RTV silicone has cured,
the door will have to be adjusted for proper sealing. If
you have just replaced the door gasket, the latch
adjuster must be pulled towards the front of the stove.
Follow the procedure mentioned above.
Fig. 37
Latch Adjuster
Fig. 38
25
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P68 Maintenance - Cleaning the Feeder Body
Pellet fines will accumulate in the feeder body over a
period of time; therefore, a yearly inspection and
cleaning of this must be performed.
5/16" Hex Head
Screws (3 on
each side)
To clean out fines:
1. Remove right rear cover panel ( see rear cover
installation on page 4 ).
5/16" Hex Head
Screws (3 on
each side)
2. Remove wing nut andfeeder cover on the right side
of the feeder.
3. Use a vacuum cleaner to remove all fines.
4. Reinstall feed cover, wing nut, and right rear cover
panel.
Feeder Cover
Wing Nut
Pellet Fines will build up in this area
Fig. 39
26
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P68 Trouble-Shooting
FEEDER DOES NOT FEED
SMOKE IS VISIBLE COMING OUT OF VENT
1. No pellets in hopper.
1. Air-fuel ratio is too rich.
2. Firebox draft may be too low for low draft pres-
sure switch in feeder circuit to operate.Check for
closed doors, loose or missing gasket on doors
or hopper lid, or a faulty pressure switch.
3. Feed motor will not run until ESP
senses 165 deg. F. Maybe you did not put
enough pellets in the burn pot before lighting the
fire manually.
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.
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.
Helpful Hints
Cleaning Burn Pot
Whenever your stove is not burning, take the
opportunity to scrape the burn pot to remove car-
bon 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.
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 com-
bustion. 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 combus-
tion, 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.
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 probe prevents the
stove from being over-fired.
Keep the stove free of dust and dirt.
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.
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.
The P68 is capable of burning all 3 categories
of pellets due to a patented feeder and burn pot sys-
tem.
SMOKE SMELL
Itshouldbe noted, however, thathigher ashcon-
tent 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 P68.
The moisture content must not exceed 8%.
Higher moisture will rob BTU's and may not burn
properly.
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.
27
P68 Pellet Stove
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P61A Feeder
P68 Feeder and Specifications
(4)3-30-2252005013
3-30-1371612513
MOTORBLADE
3-20-2046399
Specifications
Weight
290 lbs.
Blower
135 cfm
Feed Rate
Hopper Capacity
Fuel
approx. 1lb. to 8 lbs per hr
76 lbs
Wood Pellets
3 inch
Flue Size
Outside Air Size
Fuse Rating
2 3/8" I.D. inch
6 amp
28
P68 Pellet Stove
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OPTIONS
Floor Protector
Side Heat Shields
The P68 Steel Floor Protector measures 25 inches
wide by 33 inches deep. It is made of 20 gauge
steel. This is the minimum size for floor protection
with this unit.
Side heat shields are available to reduce the
clearance to combustible materials.
Part #1-00-06716
Part# 1-00-06727
20gauge steel
floor protector
33"
25"
Hopper Extension
Decorative Tile/Grey Slate Options
The hopper extension allows you to put more pellet
fuel in the hopper and extends burn time on one
load of pellets. The hopper extension adds 60
pounds to the existing 76 pound hopper capacity,
allowing you to load 136 pounds of pellets at one
time.
The decorative tile and slate measure 11.938" x
5.938". The tile/slate trim is necessary to hold the
tile/slate in place on the stove. There are 10
decorative tile choices, and 4 decorative slate
choices. See dealer for samples.
frame
tile/slate
Part #1-00-08636
11.938"
29
P68 Pellet Stove
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P68 Wiring Diagram
30
P68 Pellet Stove
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P68 Parts List
Description
Part Number
Hopper Gasket(6 ft.)
Ash Pan Assembly
Burn Pot Weldment
Right Rear Shield
0-88-00248
1-10-05800
1-10-06723
2-00-06468-1
2-00-06468-2
2-00-773850
Left Rear Shield
Arrow Scraper
Flame Guide
3-00-674069
Wiring Harness Assembly
Thermister Probe
3-20-08727
3-20-00744
Room Sensor
3-20-00906
Circuit Board
3-20-05374
Differential Switch
5" Double Fan Blade
Combustion Blower
Distribution Blower
Hopper Lid Latch
3-20-9301
3-20-502221
3-21-08639
3-21-22647
3-31-199110
3/16" Rubber Washer (for Hopper Lid)
Power Cord
3-31-90131101
3-20-29685
Auto Ignite Label (Control Panel Door)
Fire Brick (3)
3-90-08627
3-40-900450125
3-31-605
White/Black Control Knob(3)
Control Knob Shaft(3)
Mirrored Front Glass
Burn Pot Gasket(1)
Tailpipe Gasket
3-31-015
3-40-06720
3-44-00409
3-44-06179
Wiring Diagram
3-89-06504
Control Panel Sticker
Owner's Manual
3-90-06655A
3-90-06701
Hopper Lid Label
3-90-08416
Ignitor Assembly
1-10-06620
Cleanout Cover(1)
1/4-20 x 1/2" Wing Screw w/Collar(2)
Hopper Extension Assembly
Outside Air Assembly
3' Flex Pipe
2-00-06623
3-31-782108
Options:
1-00-08636
1-10-08542
2-00-08543
Log Set
3-40-5647
Side Heat Shields
1-00-06716
Floor Protector (25" x 33")
Air Grill
1-00-06727
3-43-08648 (SeeDealer forfinish options)
1-00-06717 (SeeDealer forfinish options)
3-43-1206 01 thru 10(10choices)
Floral 3-43-06731-11
Horses 3-43-06731-12
Deer 3-43-06731-2
Lighthouse 3-43-06731-9
Door Frame w/ash lip & tile/slate trim
Tile Pack(1 piece)
Decorative Slate (1 piece)
31
P68 Pellet Stove
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HARMAN GOLD WARRANTY
6 YEAR TRANSFERABLE LIMITED
WARRANTY (Residential)
1YEAR LIMITED WARRANTY (Commercial)
Harman Stove Company warrants its products to be free from defects in material or workmanship, in normal use
and service, for a period of 6 years from the date of sales invoice and for mechanical and electrical failures, in normal use
and service, for a period of 3 years from the date of sales invoice.
If defective in material or workmanship, during the warranty period, Harman Stove Company will, at its option,
repair or replace the product as described below.
The warranty above constitutes the entire warranty with respect to Harman Stove Company products. HARMAN
STOVE COMPANY MAKES NO OTHER WARRANTY, EXPRESSED OR IMPLIED, INCLUDING “ANY”
WARRANTY OF MERCHANTABILITY, OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. No
employee, agent, dealer, or other person is authorized to give any warranty on behalf of Harman Stove Company. This
warranty does not apply if the product has been altered in any way after leaving the factory. Harman Stove Company and
its agents assume no liability for “resultant damages of any kind” arising from the use of its products. In addition, the
manufacturer and its warranty administrator shall be held free and harmless from liability from damage to property related
to the operation, proper or improper, of the equipment.
THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION ON THE FACE
HEREOF.
THESE WARRANTIES APPLY only if the device is installed and operated as recommended in the user’s manual.
THESE WARRANTIES WILL NOT APPLY if abuse, accident, improper installation, negligence, or use beyond
rated capacity causes damage.
HOW TO MAKEA CLAIM - Any claimunder this warranty should be made to the dealer from whomthis appliance
was purchased. Then contact is made with manufacturer, giving the model and serial numbers, the date of purchase,
your dealer’s name and address, plus a simple explanation of the nature of the defect. Extra costs such as mileage and
overtime are not covered. Nuisance calls are not covered by these warranties.
THIS WARRANTY IS LIMITED TO DEFECTIVE PARTS - REPAIR AND/OR REPLACEMENT AT
HARMAN STOVE COMPANY’S OPTION AND EXCLUDES ANY INCIDENTAL AND CONSEQUENTIAL
DAMAGES CONNECTED THEREWITH.
WARRANTY EXCLUSIONS: Failure due, but not limited to, fire, lightning, acts of God, power failures and/or
surges, rust, corrosion and venting problems are not covered. Damage and/or repairs including but not limited to; remote
controls, filters, fuses, knobs, glass, ceramic brick panels, ceramic fiber afterburners, door packing, tile, ceramic log
sets, paint, batteries or battery back-up and related duct work are not covered. Also excluded from this warranty are
consumable or normal wear items including but not limited to; flame guides, grates, coal bars, afterburner hoods, fire
brick, gaskets. Additional exclusions for corn stoves are burnpot housing weldment, burnpot grate weldment (pellet or
corn), burnpot front plate (pellet or corn), burnpot front plate lock, corn auger extension, ceramic insert, and ceramic
insert plate. Additional or unusual utility bills incurred due to any malfunction or defect in equipment and the labor cost of
gaining access to or removal of a unit that requires special tools or equipment are not covered. Maintenance needed to
keep the stove in “good operating condition” is not covered. This includes, but is not limited to, cleaning, adjustment of
customer controls and customer education. Labor, materials, expenses and/or equipment needed to comply with law
and/or regulations set forth by any governmental agencies are not covered.
This Warranty provides specific legal rights and the consumer may have other rights that vary from state to state.
In the event of change in ownership, the remaining portion of this warranty may be transferred to the new owner
by sending the new owner information and a transfer fee of $25.00 US to the Harman Stove Company.
PLEASE READ THE LITERATURE BY THE MANUFACTURER FOR THE VARIOUS ACCESSORY
DEVICES. THE MANUFACTURER WARRANTS THESE ACCESSORY DEVICES, NOT HARMAN STOVE
COMPANY OR THEIR WARRANTY ADMINISTRATOR. FURTHERMORE, THESE ACCESSORY DEVICES
MUST BE INSTALLED AND USED ACCORDING TO THE RECOMMENDATIONS OF THE MANUFAC-
TURER.
REMEDIES - The remedies set forth herein are exclusive and the liability of seller with respect to any contract or
sale or anything done in connection therewith, whether in Contract, in tort, under any warranty, or otherwise, shall not,
except as herein expressly provided, exceed the price of the equipment or part of which such liability is based.
CLARIFY - The above represents the complete warranty, which is given in connection with stoves, manufactured
by Harman Stove Company. No other commitments, verbal or otherwise, shall apply except by a written addendum to
this warranty.
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