Harman Home Heating Accentra Configuration guide

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 ACCENTRA PELLET STOVE IS NOT PROPERLY INSTALLED, A HOUSE FIRE MAY RESULT. FOR
YOUR SAFETY, FOLLOW 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.
SAVE THESE INSTRUCTIONS.
The Accentra Pellet Stove
Installation & Operating Manual
R8a
“Ce manuel est disponible en Français sur demande”
Item # 3-90-08326

21
Maintenance
Inspect the hopper lid sponge gasket. It is important to
maintain a good hopper lid seal.
Do not allow pellets or sawdust to remain on
the hopper lip after lling.
Control door
nger hole
Draft Meter hex plug
Glass Gasket
Replace glass
o n l y w i t h h i g h
temperature
ceramic glass.
Inspect door gasket during cleaning
and inspection
Fig. 34
Soot and Flyash: Formation and Need for
Removal- The products of combustion will contain
smallparticlesofyash.Theyashwillcollect
in the exhaust venting system and restrict the
owofexhaustgases.Incompletecombustion,
such as occurs during start-up and shut-down,
or incorrect operation of the appliance, will lead
to soot formation in the venting system. The
stove and the entire venting system should be
professionally inspected and cleaned at least
once per year, aside from the regular cleanings.
Most retailers offer a cleaning service for their
customers. The best time to have this cleaning
performed is after the heating season.
Creosote - Formation and Need for Removal -
When wood is burned slowly, it produces tar and other
organic vapors, which combine with expelled moisture
to form creosote. The creosote vapors condense in the
relatively cool chimney ue of a slow-burning re. As a
result, creosote residue accumulates on the ue lining.
When ignited, this creosote makes an extremely hot
re. The pellet vent pipe should be inspected at least
twice monthly during the heating season to determine
if a creosote buildup has occurred. If creosote has
accumulated it should be removed to reduce the risk
of a chimney re.
Guidance on minimizing creosote formation and the
need for periodic creosote removal: The chimney should
be inspected during the heating season to determine if
a creosote build-up has occurred. If a signicant layer
of creosote has accumulated, 1/8” (3mm) or more, it
should be removed to reduce the risk of a chimney
re.
The glass used in your stove is manufactured to exact
standards to withstand the high heat of the re, but like
all glass, it must be treated with common sense and
care. Never abuse the glass by slamming the door shut
or striking the glass with a heavy object. If the glass is
broken or damaged, do not operate the stove until it
has been replaced.
Glass - Replacement
If the stove’s glass is cracked or broken, you must
replace it before operating your stove. Remove pieces
carefully. Replace glass only with Harman replacement
glass; do not use substitutes.
Carefully remove damaged glass, gasket material,
and hold down clips (set aside).
Install the self adhesive 1/4"” gasket material around
the front face of the glass. Set the glass panel and
gasket gently onto the door. Install the hold down clips
and tighten with bolts.
Glass - Cleaning
Sometimes it will be necessary to clean accumulated
ash from the glass surface; allowing this ash to remain
on the glass for long periods can result in “etching” due
to the acidity of the ash. Never clean the glass while it
is hot, and do not use abrasive substances. Wash the
surface with cool water, and rinse thoroughly. You may
wish to use a non-abrasive cleaner specically designed
for use on stove glass. In any case, dry thoroughly be-
fore relighting your stove.

22
Recommended once per month or after each ton
of pellets burned:
1. Remove the two heat exchanger covers. See Fig.
35. These covers are made of cast iron and are held
into place with a swing latch in the upper right and left
corners. See Fig 36. Swing the latch upward far enough
to release the top edge of the heat exchanger cover.
Tilt the cover forward approximately 2" and lift it upward
about 1" to release the bottom edge. The cover can
now be taken completely out through the upper door
opening. Repeat the process with the second heat
exchanger cover.
(Continued next page;)
Maintenance - Cleaning
Heat Exchanger cover latch
Fig. 36
Cleaning Internal Components
Feeder Chamber
This chamber may get a buildup of nes from the
feeder mechanism movement. This area should be
checked and cleaned at least once a year.
To remove the feeder cover:
• Remove the 5/16" wing nut.
• Lift the cover off of the tab at the top and the
threaded stud.
• Inspect and clean the inner chamber if necessary.
See above picture.
• Reinstall the cover by hooking it over the top tab
then secure the wing nut (hand tighten only).
Possible pellet nes
buildup area.
Fig. 35
Ash Removal
Due to potential high temperatures, it is recommend-
ed that the stove be out and cool prior to removing the
ash pan. Open the front door and grasp the ash pan
by the handle. With the ash pan removed, swing the
handle upward for carrying.
Disposal of Ashes- Ashes should be placed in a
metalcontainerwithatightttinglid.Theclosed
container of ashes should be placed on a non-
combustibleoororontheground,wellaway
fromallcombustiblematerials,pendingnal
disposal. If the ashes are disposed of by burial in
soil or otherwise locally dispersed, they should be
retained in the closed container until all cinders
have been thoroughly cooled.

23
Maintenance - Cleaning
Combustion intake assembly latch
2. Remove the combustion intake assembly. See
Fig. 35. The combustion intake assembly is held into
place with two swing latches. See Fig. 37. Swing
each latch until it hangs down away from the retainer
stud. Now the assembly can be taken out by tilting
the right side outward rst through the lower door
opening.
3. The units interior is now ready to clean. Use
the scraper provided to clean the heat exchanger
surfaces. A wire brush or short bristled brush is an
excellent cleaning tool. Clean the fan blade and
combustion blower fan housing. NOTE: Be careful
not to bend the fan blade while cleaning. A bent
blade will throw the fan blade out of balance. See
Fig. 38.
4. With the blower housing open, there is easy
access to the ue pipe exiting the rear of the unit.
See Fig. 38. Vacuum the ue pipe as far into the
pipe as possible. NOTE: Be careful while cleaning
the ue pipe not to bend the exhaust probe. The
ESP is approximately 8" into the tube and is visible
when looking into the exhaust.
Fig. 37
Fig. 38
ESP location

24
Burn Pot Cleaning and Maintenance
Whenever loading fuel into the hopper, take the
opportunity to scrape the top holed surface and sides
of the burn pot down to auger tube.(Fig 39) It is not
necessary to completely remove all material from the
burn pot. The excess will be pushed out during the
next use.
Approximately once per month, clean out the air-ow
portion of the burn pot:
1. Loosen the (2) wing thumb screws on the lower
front angle of the burn pot. (Fig. 39)
2. Lift off the clean-out cover (Fig.40) to open the
bottom clean-out chamber. (Fig.41)
3. 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 41
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.
WARNING
Use caution when cleaning burn pot clean-out
chamber. Do not damage the high temperature
igniter wires.
Fig. 39
Fig. 40
Fig. 41
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.
Maintenance - Burn Pot

The Low Draft Pressure Switch is a differential pressure
switch that senses the pressure between the rebox and the room. If the negative pressure in the rebox becomes too low for proper combustion, the switch opens, interrupting power to the feed motor and the igniter. If the switch "opens" during a rest period, the control will not try to feed or ignite. If the circuit opens during a feed or ignition cycle, the indicator lights will remain "on".
The Control Board/ESP combination is responsible for all
high limit safety control. There are 2 high limits, one normal op- eration high limit and one backup high limit. The control has an automatic diagnostic circuit that continuously monitors the ESP and Room Sensor for faults. If a fault should occur, the control sends a status alert and at the same time the unit goes down to minimum feed/minimum burn as a safety condition.
Accentra Motor & Component Locations
Accentra Pellet Stove Safety Devices
ESP- Probe
Low Draft Pressure Switch
Air Intake Flapper
Feed Motor
Combustion Blower
Distribution Blower 3" Flue Pipe Connector
The Hopper Lid Position Switch is a plunger style switch
located in the hopper lid opening. When the hopper lid is closed properly, it closes the switch. If the hopper lid is not fully closed, the switch opens, intercepting power to the feed motor and igniter. If the switch "opens" during a rest period, the control will not try to feed or ignite. If the circuit opens during a feed or ignition cycle, the indicator lights will remain "on".

26
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 high-temperature silicone.
FIRE HAS GONE OUT - Check for "Status" code.
1. No pellets in hopper.
2. Draft setting is too low.
3. Something is restricting fuel ow.
4. Hopper lid not closed properly.
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.
Trouble-Shooting
Cleaning Burn Pot
Whenever your stove is not burning, take the
opportunity to scrape the burn pot to remove carbon
buildup. A vacuum cleaner is handy to remove the resi-
due. 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 rec-
ommended when maximum heat output is not required.
The ESP prevents the stove from being over-red.
Keep the stove free of dust and dirt.
Helpful Hints
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 Accentra 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 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 Accentra.
The moisture content must not exceed 8%. Higher
moisture will rob BTU's and may not burn properly.
Keep fuel in a dry location. Do not store fuel within
the installation clearance area of the room heater.