Harman Accentra Pellet Insert Installation instructions

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 APPLIANCE IS NOT PROPERLY INSTALLED, A HOUSE FIRE MAY RESULT. FOR YOUR SAFETY, FOLLOW
INSTALLATION DIRECTIONS. DO NOT USE MAKESHIFT COMPROMISES.
CONTACT LOCAL BUILDING OR FIRE OFFICIALS ABOUT RESTRICTIONS AND INSTALLATION INSPECTION
REQUIREMENTS IN YOUR AREA.
CONTACT YOUR LOCALAUTHORITY (SUCHAS 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.
SAVE THESE INSTRUCTIONS.
The Harman Accentra Pellet Insert
Installation & Operating Manual
“Ce manuel est disponible en Français sur demande” R11
Item# 3-90-00674

28
Maintenance - Cleaning Glass on View Door
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).
Installtheselfadhesive1/4"” gasketmaterial around the front face of the glass. Set the glass panel andgasket
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
before relighting your stove.
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 thoroughly cooled.
Sootandyash:Formation and need for removal. The products of combustion contain small particles of
y ash. The y ash will collect in the exhaust venting system and will restrict the ow of the ue gases. Pellet
fuels have different ash contents depending on what type of wood has been used to make the pellets. We
recommend to clean the system after approximately 1 ton of pellets have been burned and judge from
that how often the stove should be cleaned, remember if you change pellets it may change how often
you have to clean your stove.
When burning wood slowly, the potential exists for creosote to form. The venting system should be
inspected periodically throughout the heating season to determine if a creosote buildup has occurred. If a
signicant layer of creosote has accumulated (3mm or more), it should be removed to reduce the risk of
a chimney re. If a re occurs, call the re department, shut down the stove, and evacuate the residence.
Before using the appliance, have the venting system thoroughly inspected and replace any damaged
components.
Glass Gasket
Replace glass
only with high
temperature
ceramic glass.
Inspect door gasket during
cleaning and inspection
Fig. 57

29
Burn Pot Cleaning and Maintenance
Whenever adding fuel, take the opportunity to clean
the burn pot.(Weekly at minimum)
• Scrape the top holed surface and sides of the burn
pot down to auger tube.(Fig 58) It is not necessary to
completelyremoveall materialfrom the burnpot.The
excess will be pushed out during the next use.
Monthly, or after each ton of fuel burned:
• Loosenthe(2)wingthumbscrewsonthelowerfront
angle of the burn pot. (Fig. 59)
• Lift off the clean-out cover (Fig.59) to open the
bottom clean-out chamber. (Fig.60)
• 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 60
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.)
Itis veryimportantthat theseconnectionsare tothe
inside rear of the feeder body. Also, the extra wire of
theigniterwireserviceloop mustbepulled 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.
DANGER
Disconnect the power to the unit before
removing cover.
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
Fig.58
Fig. 59
Fig. 60
Burn pot igniter

30
Maintenance - Cleaning
Cleaning the Heat Exchanger
Theaccordionheatexchangersurfacesaretheprimary
source of heat transfer into the room. Therefore, it is
very important to keep them clean from yash and
soot buildup.
•Theheatexchangersurfacesshouldbecleanedafter
approximately every 1 ton of pellets are used.
• Use the scraper provided to clean all the way into
the point.
• Note: An old paint brush works well to clean these
surfaces.
• Note: The unit “must be cold” before using anything
other than a wire brush.
• There are 2 primary air inlet holes on the rear ange
of the burnpot. They should be checked for blockage
and cleaned with a vacuum if necessary. Note: The
bottom of the ame guide has 2 notches that match
the holes.
Cleaning the Heat Exchanger tubes
Using the cleaning brush provided, clean these tubes
after every 1 ton of pellets are used.
These tubes are an important part of the heat ex-
changer. Efciency will be lost if they are not properly
maintained. The right side tube is a straight passage
to the combustion blower chamber. The Left side tube
follows straight back then makes a right turn, across
the back, to the combustion chamber. You will need
to use the entire length of the cleaning brush handle
to properly clean this tube.
Monthly Cleaning- continued:
There is a 2" square exhaust tube on each side (lower
left and right corners) of the rebox. They can only be
seen with the cast heat exchanger covers removed.
Fig. 61
Fig. 62
Fig. 63
Primary Air Inlets

31
Maintenance - Cleaning
Feeder Chamber
This chamber may get a buildup of nes from the feeder
mechanismmovement.Thisareashouldbecheckedand
cleaned at least once a year.
To remove the feeder cover:
• Remove the 5/16" wing nut.
• Slide the cover off of the threaded stud.
• Inspect and clean the inner chamber if necessary. See
Fig. 65.
• Reinstall the cover making certain it is centered on the
feeder body and tighten as tightly as you can by hand.
The combustion blower is made to be removed easily for
inspection and cleaning. See Fig. 67.
The combustion blower is mounted on a precision cut
gasketless mounting plate. This plate is held into place
with (3) thumb screws. See Fig. 67.
To remove the combustion blower:
•Turnthethumbscrewscounterclockwiseapproximately
5turns.Rotatetheentireassemblycounterclockwiseuntil
the points of the retaining slots are visible.
• Remove the blower assembly with the fan blade by
pulling it directly away from the blower housing.
• Thecord on themotor is longenough to allowthe motor
to be set down on the black plastic fan cover. This allows
for easy access to inspect and clean the area. See Fig.
66.
•Withtheblowerassemblyout,inspectionshouldbedone
on the surfaces of the blower assembly and the housing
opening where they meet. These surfaces MUST be
clean and free from dirt, grit, yash, soot or nicks in the
metal. This gasketless seal relies on an extremely close
tolerance. Therefore, anything other than a clean joint
may cause exhaust gases and/or yash to escape.
• The assembly can only be reinstalled in one position:
withthemotorwindingintheupwardlocation.SeeFig.67.
The mounting plate will not allow for any other position.
• Always make sure that the assembly is fully seated and
the (3) thumb screws are tightened before operating the
unit.
5/16"
wing nut
ESP
Feeder rear
chamber/
clean out
cover
Pellet
Metering
slide plate
Possible pellet
nesbuildup
area.
Mating
Surface
Close
Tolerance
Close
Tolerance
Close
Tolerance
Close
Tolerance
Fig. 64
Fig.65
Fig. 66 Fig. 67

32
The Low Draft Pressure Switch is a differential pres-
sure switch that monitors the negative pressure (Draft) in the rebox. If the draft becomes too low for proper combustion, the switch opens, cutting power to the feed motor and the igniter circuits. This switch is connected into the AC (high voltage) wiring.
TheControl Board/ESPcombinationis responsible for
all high limit safety control. There are 2 high limits, one normal operation 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 Insert Motor & Component Locations
Accentra Pellet Insert Safety Devices
Backdraft Damper Assembly Always check to see if the damper plate swings freely inward and that the seating edges are not covered with dirt or lint.
Low Draft Pressure Switch
Feed Motor
Combustion Motor
Distribution Blower (under unit) See Fig. 10, Page 9.
Silicone sponge docking gasket
Motor & Component Locations
The Hopper Lid Position Switch is found in the rear
corner of the hopper opening. If the hopper lid is not fully closed, the switch opens, interrupting the power to the feed motorandtheignitercircuits.Thispreventspossibleinjuryfrom reaching into the feeder mechanism during operation.
Hopper Lid Position Switch

33
Trouble-Shooting
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 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 re-
quired. The ESP probe 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.Fireboxdraftmaybetoolowforsensingswitchin
feedercircuittooperate.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
putenoughfuelorstartinggelintheburnpotbefore
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
indicationiscausedbypoororincompletecombus-
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.
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.
The Accentra is approved for burning any grade
ofpelletizedbio-massfuel.Itisalsoapprovedforburn-
ing shelled corn in a mixture with wood pellets, up to
50%.(See Page 46)
It should be noted, however, that higher ash con-
tentwillrequiremorefrequentashremoval,scrapingof
the burn pot, and may provide less BTU's per pound.
The moisture content of pellets must not exceed
8%, and corn must not exceed 15%. Higher moisture
will rob BTU's and may not burn properly.
Fuel should not be stored within the stove installa-
tion clearances or within the space required for charg-
ing and ash removal. See Page 14.