Harman Home Heating Harman Accentra 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 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.
SAVE THESE INSTRUCTIONS.
The Harman Accentra Pellet Insert
Installation & Operating Manual
“Ce manuel est disponible en Français sur demande” R15
Item# 3-90-00674
This Fireplace insert may be installed into a masonry
replace, an approved manufactured wood burning replace
(see page 25), Or, It may be built in to a wall or mantle system
when using the optional zero clearance cabinet (see page 26).

SAMPLE
HEARTH & HOME TECHNOLOGIES
09-3178
FOR USE WITH PELLETIZED WOOD FUEL OR UP TO A 50%
CORN AND PELLET MIXTURE ONLY.

3
Introduction
Hearth & Home Technologies, Inc.
352 Mountain House Road
Halifax, PA 17032
www.harmanstoves.com
Table of Contents
Automatic Operation 4
Manual Operation 6
ESP Control 8
Assembly & Installation 9
Venting 21
Maintenance 28
Trouble-Shooting 33
Specications 34
Wiring Diagram 35
Warranty 36
Service Parts List 38
Corn / Pellet Mixture 46
The Accentra Pellet Insert will give you more heat, better temperature control and a level of convenience you won’t nd in any other
pellet burning insert. The Accentra Insert’s many outstanding features make it the best value pellet insert on the market today.
The Accentra’s versatile design lets you convert a heat wasting replace into an efcient heating source. The Accentra Insert could also
be a replace hearth for your home that doesn’t require a chimney. A special zero clearance replace kit converts the Accentra insert
into a replace that can be placed in virtually any corner or against any wall of your home.
The Accentra’s on-board microprocessor constantly senses room temperature and automatically makes adjustments in the feed rate and
air supply so you get just the right amount of heat 24 hours a day. This remarkable technology lets you ll the hopper, set the desired
temperature and walk away. The Accentra insert lights automatically, brings the room up to the exact temperature and will turn off if
no heat is required. No other pellet insert offers such accurate and trouble free temperature control. The control technology gives you
the widest heat output range of any insert on the market making it an ideal choice to take the chill off in the spring and fall and to heat
your home during the coldest months of the winter.
As with all Harman pellet stoves, maintenance is minimal and cleaning is easy. The Accentra Insert lets you burn close to a ton of pellets
before ash removal is needed. And what is even better, the Harman Insert Track System lets you slide the insert out of the replace so
that it can be cleaned or serviced without having to disconnect the venting system. This innovative design is only available on Harman
pellet inserts and lets you easily reach key components for cleaning.
Please copy your serial
number from the label
on your stove to the box
below.
Note: This appliance is also approved for
installation into a shop.
Appliance Certication.
Model: Accentra Insert
Test Lab: Omni-Test Laboratories
Type: Pellet Burning Fireplace Insert / Room Heater
Standard(s): ASTM E1509-04, ULC S628-93 and
ULC C1482-M1990. In accordance with OAR 814-
23-900 through 814-23-909
HEARTH & HOME TECHNOLOGIES
09-3178
FOR USE WITH PELLETIZED WOOD FUEL OR UP TOA 50%
CORN AND PELLET MIXTURE ONLY.

4
Starting First Fire
Igniter Switch to "AUTO" (up position)
Make sure the unit is plugged into a properly
grounded, 120 VAC, 60 Hz electrical source. The
power light should be the only light lit.
Note: Be sure there is no fuel or other
combustibles in the ash pan prior to lighting.
1. Turn Mode Selector to "OFF".
2. Fill hopper with pellets.1
3. Clean burn pot with scraper, if necessary.5
4. If starting after an empty hopper, turn Feed
Adjuster to "TEST" (for one 60 second cycle).2 This
will ow pellets into the auger tube and also allow
you to check the motors for operation. NOTE: The
auger motor will not operate with the view door
or hopper lid open.3
5. Turn Feed Adjuster to #4.4
6. Flip the Igniter Switch up into the "AUTO"
position.
7. Turn the Temperature Dial to the desired room
temperature.
8. Turn Mode Selector to Room Temperature or
Stove Temperature.
9. Fill hopper with pellets and remove ashes as
required.6
Keep the hopper lid and rebox doors closed while
in operation. Maintain door seals in good condition.
Failure to do so will affect operation of the appliance
and may permit escape of smoke or gases into the
living space.
Automatic Start Up
1. Fines are small pieces of broken pellets (sawdust). Fines do
not ow easily and often build up on the hopper funnel bottom
angles. These nes can be pushed into the feeder opening and
then ll the hopper with pellets. As the system works, they will
be burned.
2. The "TEST" cycle will operate the feed motor for exactly one
minute. Turning to "TEST" again and again may load too much
fuel into the burn pot causing excessive smoke on start-up.
3. The rebox low pressure switch will not allow the auger motor
or the igniter element to operate if the view door is open.
4. Adjust Feed Rate. If this is your rst re or you are trying
different pellets, set the feed adjuster to #4, Fig. 1. This is a
conservative number and will probably need to be increased.
After you 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 not a problem. First, scrape the ashes off the
front of the burn pot into the ash pan. Then scrape the holed
surface downward into the burn pot. When the stove feeds, these
scrapings will be pushed out by the feeder.
6. The ash pan can hold the ashes from approximately 1 ton of
premium fuel. This means the ashes will 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 put the fan on
"H". Set the Temperature Dial to #7. Allow the unit to burn for
about 30 minutes and check ash on front of burn pot. Fig. 2.
If the 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 not obtainable, it is not
a problem. The 1" ash bed is only at maximum burn rate and
during normal operation, the ash bed will be larger.
See Note 7.
Fig. 2
1"
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 AWAY FROM THE
HEATER, WHILE IN USE.
WARNING
Fig. 1
WARNING
BURNING GARBAGE, USE OF IMPROPER FUELS,
FIRE STARTERS OR ALTERING THE STOVE FOR
HIGHER HEAT OUTPUT MAY CAUSE DAMAGE TO
THE STOVE AND COULD RESULT IN A HOUSE
FIRE. USE ONLYAPPROVED FUELSAND FOLLOW
ONLY THESE OPERATION GUIDELINES.

5
The Accentra Insert is more than just automatic ignition, it is also automatic temperature
control. The automatic system will allow the re size to be adjusted to match the
heating needs and even put the re out if necessary. If heat is needed after the re is
out, the Accentra Insert will automatically re-ignite and adjust the re size to match the
heating need. The totally automatic room sensor mode is recommended because of its
efciency. The unit can be switched between "AUTO" and "MANUAL" at any time during
operation.
Igniter switch to "AUTO"
Room Temperature Mode
In "Room Temp Mode" heat output is controlled auto-
matically by the Room Sensing Probe. When the Room
Sensing Probe calls for heat, the stove will increase out-
put. When the Room Sensing Probe is getting close to
the set temperature, the stove will begin to level off output
and keep the re burning at just the right temperature to
maintain that setting.
High output is determined by the feed rate setting. This
setting, generally on #4, can be increased if higher burn
rates are necessary (Fig. 1). The unit's maximum burn
rate should not create less than 1" of ash on the burn
pot front edge(See Fig.2). Overfeeding is not a safety
concern, but fuel may be wasted if unburned pellets fall
into the ash pan.
In "Room Temp Mode" a constant fuel consumption
rate is sacriced for exact room temperature. Therefore,
as it gets colder more pellets will be burned automati-
cally.
The distribution blower speed will vary according to the
position of the mode selector pointer, and re size.
Igniter switch to "AUTO"
Stove Temperature Mode
This allows for automatic ignition upon start-up only.
The unit can then be set at any desired setting. The
heat output and fuel consumption will remain constant
regardless of room temperature (See Fig 4). The unit's
maximum feed rate should not create less than 1" of ash
on the burn pot front edge. See Fig 2.
The unit's low burn or maintenance setting is as low
as it will go. It will not go out unless it runs out of fuel or
is turned off.
Shut-Down Procedure
To kill the re or stop burning the stove, turn the Mode
Selector to "OFF". This will cause the re to diminish and
burn out. When the re burns out and the stove cools
down everything will stop.
If you pull the plug to shut down the stove, all motors
will stop. This may cause incomplete combustion and
smoke in the rebox. If the load door is opened, the
smoke may escape.
The best way to shut down the stove is simply let it
run out of pellets, then the stove will shut down automati-
cally.
Automatic Ignition/Operation
Fig. 4
Room Temperature Mode: This setting will produce a room temperature
of 70 degrees with the distribution blower at medium speed.
This setting will produce medium heat with the
distribution blower on "low".
This setting will produce continuous maximum heat
output with the distribution blower at full speed.
Stove Temperature Mode
Fig. 3

6
Manual Start Up
Starting First Fire
Igniter Switch to "MANUAL" (down position)
Make sure the unit is plugged into a 120 VAC, 60 HZ
electrical source. The power light should be the only
light lit.
NOTE: Be sure there is no fuel or other combustibles
in the ash pan prior to lighting.
1. Turn FEED ADJUSTER to desired feed rate. No. 4 is
good for most pellets.4
2. Turn the MODE SELECTOR to “OFF” and then to
the desired mode. This will reset control and start
the combustion motor.
3. Turn the TEMPERATURE DIAL to the desired set-
ting.
4. Clean burn pot with scraper if necessary.5
5. Fill burn pot with pellets, only level with front edge.
(Do Not Over Fill).
6. Add starting gel on top of the pellets. Stir gel into pel-
lets for fast lighting.
7. Light starting gel with a match, and close the door.
Operation will begin when the re reaches the proper
temperature.3
8. Fill hopper with pellets and remove ashes as re-
quired.1, 6
Store fuel in a dry area, away from all ignition
sources and outside all limits of the stove's clearance
requirements to combustibles. Do not store the fuel were
it interferes with the refueling of the stove or emptying of
ashes. Do not store any ashes removed from the stove
near the fuel or other combustible materials.
1. Fines are small pieces of broken pellets (sawdust). Fines do
not ow easily and often build up on the hopper funnel bottom
angles. These nes can be pushed into the feeder opening
and then ll the hopper with pellets. As the system works, they
will be burned.
2. The "TEST" cycle will operate the feeder motor for exactly one
minute. Turning to "TEST" again and again may load too much
fuel into the burn pot causing excessive smoke on start-up.
3. The rebox low pressure switch will not allow the auger motor
or the igniter element to operate if the view door or the hopper
lid are open.
4. Adjust Feed Rate. If this is your rst re or you are trying
different pellets, set the feed adjuster to #4, Fig. 5. This is a
conservative number and will probably need to be increased.
After you 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 not a problem. First, scrape the ashes off the
front of the burn pot into the ash pan. Then scrape the holed
surface downward into the burn pot. When the stove is ignited
these scrapings will be pushed out by the feeder.
6. The ash pan can hold the ashes from approximately 1 ton
of premium fuel. This means the ashes will 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 put the fan on
"H". Set the Temperature Dial to #7. Allow the unit to burn for
about 30 minutes and check ash on front of burn pot. Fig. 9. If
the 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 not obtainable, it is not
a problem. The 1" ash bed is only at maximum burn rate and
during normal operation, the ash bed will be larger.
Fig. 6
Fig. 7
1"
See Note 7.
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 AWAY FROM THE HEATER WHILE IN USE.
Warning
Fig. 5
WARNING
BURNING GARBAGE, USE OF IMPROPER FUELS,
FIRE STARTERS OR ALTERING THE STOVE FOR
HIGHER HEAT OUTPUT MAY CAUSE DAMAGE TO
THE STOVE AND COULD RESULT IN A HOUSE
FIRE. USE ONLY APPROVED FUELS AND FOLLOW
ONLY THESE OPERATION GUIDELINES.

7
The Accentra Insert is capable of manual operation. This also allows the operator
to manually control 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.
Igniter Switch to "MANUAL"
Room Temperature Mode
The re will have to be lit with starting gel and a
match, or started automatically, see "Automatic Op-
eration". Turn to "Manual" position once the start cycle
begins.
The difference between "AUTO" Room Temperature
Mode and "Manual" Room Temperature Mode is that
the re 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 increases.
Feed rate adjustments and dial settings are the same
as "AUTO" settings.
Igniter Switch to "MANUAL"
Stove Temperature Mode
The advantage of this mode is to allow the operator
to have a large viewing re without blowing extra heat
into the room.
During operation, with the temperature dial set at #4
or less, the distribution fan will not operate. A #4 on the
temperature dial and a #4 on the feed adjuster is ap-
proximately 80% output. It is not necessary to operate
the distribution blower below this point. Therefore, there
can be a higher feed rate ( a larger viewing re) 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 re and
the room is already up to temperature. The Stove
Temperature Mode allows you to have a larger re 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 increase
the re size, the distribution blower will automati-
cally come on when the ESP Temperature reaches
350oF, or 81% output.
NOTE: When starting the unit in the "AUTO" mode
and switching to "MANUAL", you may switch at
any time. Once an ignition cycle is started, it will
continue regardless of mode.
Manual Ignition/Operation
Room Temperature Mode: This setting will produce a room temperature
of 70 degrees with the distribution blower at medium speed.
This setting will produce a large viewing re without a
distribution blower operating.
Fig. 9
Manual Stove Temperature Mode
Fig. 8

8
ESP Control
Status light error messages:
3 Blinks: Indicates that the ESP (Exhaust Sensing
Probe) has failed, has a broken connection, or has
gone out of range too many times. This requires a
manual reset*.
4 Blinks: Can occur only in Room Temp Mode and
indicates Room Sensing Probe failed or not installed.
If a Room Sensing Probe is then installed, the status
light will automatically reset.
NOTE: Unit will not start in "AUTO" with this status
error.
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 33,
for more details.
* Manual reset- disconnect power cord for a few seconds
and reconnect. If error still occurs call your Dealer.
Feed adjuster
Sets the maximum
feed rate
Test
Runs all motors at
full speed for one
min ut e t o check
operation. After two
minutes the stove will
go to minimum burn
and the blowers will
alternate from high
to low every minute
to remind you that
you are still in "Test
Mode".
Igniter switch
Set to appropriate
Start-Up mode.
Distribution Blower speed
adjustment range.
L = low
H = high
Variable speed anywhere
between L and H;
although as the stove
temp. goes up , so does
the L and H scale.
Temp dial
Allows you to adjust the room temperature setting, in Room
Temp Mode, using the outer scale marked in degrees
Fahrenheit. It also allows you to adjust the stove temperature
setting, while in Stove Temp Mode, using the inner scale
marked from 1 to 7.
Mode Selector
Allows you to choose
between Room Temp Mode,
Stove Temp Mode, or OFF.
Also allows you to vary the
distribution blower speed by
turning the knob to the high
or low side of each mode.
Power Light
Indicates power to the
control.
Indicates power to the
feed motor.
Indicates igniter is on.
Indicates power to
combustion blower
Status Light
Will be lit in either stove
or room temp mode
when pointer is not
within off position band
except after normal shut
down. Blinks to indicate
errors listed below.
Indicates power to
distribution blower.
Dealer Diagnostic Port
For dealer maintenance
only. Requires special DDM
monitor supplied to Harman
Dealers exclusively.

9
Top and Lid Assembly
Center
Medallion
Flame Guide
Heat
Exchanger
Cover
Ash Pan
(2) Spring Latches
(One on each side)
Fig. 11
Installation
How to Reduce the Weight for Installation
1. Remove the top/lid assembly and side panels.
• Note: Removal of the cast hopper lid itself is NOT
necessary or recommended.
• Note: The hopper lid must be in the "OPEN" position
before the top/lid assembly can be lifted off or reinstalled
on the stove body.
• There are (4) 1/4-20 x 1/2" ange head bolts securing
the top/lid assembly to the stove body. They can be
removed from the underside with a 3/8" socket.
The cast top and lid assembly bolt down bars:
On each side of the stove body, underneath the cast
top, are (2) 1/4" ange head bolts. See Fig. 12.
These bolts pull the cast top and lid assembly down onto
the hopper gasket to seal the hopper.
They also allow for a small amount of front to back
adjustment for alignment of the top into the wing
pockets.
Internal
Cast Iron
(4) pieces
Mounting Shell
Protector Angles: These angles are designed
to protect the blower motor from damage when
placed on a at surface. Be careful where and
how the stove body is handled.
Be careful not
to damage the
distribution blower
located under the
insert. There are
guards on both sides
of the motor to allow
the insert to rest
on a flat surface,
however, extra care
should be taken.
Distribution Blower
Bolts require a
3/8" socket.
(View looking up under the cast top.)
Top bolt down bar
Fig. 10
Fig. 12
NOTICE: When removing the top and lid assembly,
rst remove the hopper lid position switch from its
mounting bracket. Loosen the switch retainer nut,
and allow the switch to drop out of the bracket.
Leave the bracket in place.

10
Installation
2. Remove the door by swinging it open approximately
90oand lift it upward until it clears the hinge pins.
3. Remove the ash pan
4. Remove the (4) internal pieces of cast iron. See Fig.
14 and 15.
How to Reduce the Weight for Installation, cont'd
Removing the Center Medallion
• Lift up on the 2 bottom corners of the medallion until
it is higher than the top of the ame guide.
• Pull the bottom edge of the medallion front approxi-
mately 1 inch.
• Pull downward on the corners of the medallion until
the top is released from the 2 retainers that keep the
top aligned when in place.
• Note: The heat exchanger covers will tilt to the front
when the center medallion is removed.l
Removing the Heat Exchanger Covers
• Remove the heat exchanger cover by lifting it upward
about 1/2 inch and move the bottom edge front until it
sits at on the rebox bottom.
• Rotate the edge of the heat exchanger closest to the
burnpot until it is in front of the burnpot.
• Tip the top of the heat exchanger toward the middle
of the opening until it can be lifted up and out.
Center Medallion
Flame guide
Burn Pot
3rd: DOWN
3rd: DOWN
1st:UP 2nd: OUT
2nd: OUT
1st:UP
Fig. 14
Lasered hinge pin
pivoting point
Up and down clearance
adjustment slots.
Cast side
panel hinge
Fig. 13
Lifting tab
Fig. 15
Remove the cast side panels by lifting them upward
off of the hinge pins. See Fig. 13.

11
Installation
IMPORTANT: The mounting frame/surround assembly
and ue piping is the most critical part of the installation
and must be done correctly and installed securely.
1. Choose the chimney conguration that is best suited
for the installation. See venting section. Page 21
• Note: If 100% outside air is desired or required, the
outside air option will need to be installed on the stoves
body. (See instructions included with outside air kit (part
#1-00-674080.) See Page 22.
2. Make sure the unit will t into the replace opening.
When installing in smaller replaces, test t the mounting
frame into the rebox. Note: The unit overhangs to the
rear. See Fig. 17
3. Install the 3 piece cast surround set to the sides
and top of the mounting frame with the bolts and nuts
supplied. The left and right side should be done before
the center section is installed. Make sure the bolts are
loose. Do not remove the side panel hinges. The left and
right side wings should be standing up aligned with the
side of the mounting frame and slid inward towards the
center. Note:The wings mount on the rear side below
the notch and on the front side above the notch. See
Fig. 16 & 18. Slide the cast ash lip onto the frame and
check to make sure it can go against the roped frame
rails and ts into the pockets on the left and right cast
sides. See Fig. 19.
Install the center section.
4. If the wing extension is required, it should be installed
next.
Beginning Installation
NOTE: The stove body extends through the mounting
frame in the rear approximately 2".
Approximately 2" overhang
Fig. 17
Cast in front of
the frame. Use
(1)1/4-20 x 3/8
ange bolt from
the rear.
Cast behind the
mounting frame
flange. Use (2)
1/4-20x5/8 ange
bolts and nuts
with bolts from
the front.
Fig. 18
Slide the ash lip
casting into the
frame, making
certain the ash
lip is sitting on
the slide rails on
either side. With
th e ash lip i n
place, adjust the
surround sides so
there is an even
gap where the
ash lip extends
into the surround
side and tighten. Fig. 19
3" Outside Air
starter collar
Fig. 16
Notch
Ash lip slide rails

12
Installation
5. The power cord can be installed exiting the left
(standard) or right side of the surround. If a right side
cord is desired, follow the instructions below.
Changing the cord exit location from the left side
to the right side:
The cord is located on the left side, standard from
Harman. (See g 21.)
To route the cord to the right side:
• Cut the wire-ties looping the cord to the left
• Re-route the cord along the top of the steel angle
and down the right side.
• Re-tie (not supplied by Harman) the wire through the
notches provided in the mounting frame. Then down
the right side rail.
• Do not remove or move the cord retainer, it is made
to reach both the right and left sides.
Nothing can extend
beyond this face to
the back side. DO
NOT
CUT.
Connecting the cord retainer to the wing
With the three wing pieces completed, the cord retainer
must be bolted to the bottom rear of the wing. Either left
exit (shown in g. 22) or right exit.
At the bottom rear edge of the right and left wing there
is a small radius indent for the cord to exit between the
wing and the replace face.
6. You must now decide whether to install the room
sensor as a wall sensor or as a return air sensor.
Harman highly recommends that the room sensor be
installed. If you are installing the room sensor as a wall
sensor, the long black 2 wire cable must be wire-tied
to the power cord. This wire is long enough to reach
the end of the power cord so the installer can reach
past the hearth to the location where the extension
wire (18/2 thermostat wire, not supplied by Harman)
can be spliced to go to the wall location chosen for the
room sensor.
Ground
wire-ties
Fig. 21
Fig. 22
Fig. 23
Optional Wing Extension
The optional wing extension is made for replace open-
ings which are larger than the cast wing. The standard
wing extension is 48" wide by 34" high.
Custom sized wing extensions can be purchased from
your dealer, for any replace openings larger than the
standard wing extension area.
These optional wing extensions will have a 1/2 inch
return bend as shown in g. 20. Custom oversized wing
extensions with a radius top can be ordered with a radius
of your choosing. These radius wing extensions WILL
NOT have a return bend, although they will be made of
thicker metal to reduce warpage.
Fig. 20
1/4-20 x 3/8
button head bolts
(5/32" allen wrench)
(5/32" allen wrench)

13
Installation
7. If the room sensor is used as a return air sensor
rather than a room thermostat/sensor, the black cable
will not be used. The room sensor itself (gray or black
cable with black and red wires) will be connected to the
blue twisted wires from the control board.
Note: The stove body must be able to slide out of the
shell to the limit of the power cord wires for cleaning and
service. Therefore, if the room sensor is connected as
a return air sensor, the wire should be connected long
enough to allow this, but not too long that it would get
tangled or pinched anywhere.
Notice: The male/female connections between the
mounting shell and the stove body should always be
maintained. Wirenut or taped splices should never be
used.
• Insert the sensor end of the wire from the rear of the
mounting frame through the hole as shown in g. 24 .
• Wire-tie the sensor end so that the sensing tip is in the
middle of the front return air opening. See Fig. 25.
• Wire-tie the sensor wire to the inside of the mounting
frame up to the cord grounding location. Follow the
power wiring to where you make the male/female ter-
minal connection to the twisted blue wires.
There are (2) crimp-on connectors in the hardware pack
that must be installed on the internal ends of the room
sensor wires.
Side Return Air Holes
8. Install the (4) 3/8-16 x 1" leveling bolts into the
threaded holes in the bottom pan of the mounting shell.
The front two leveling bolts may not be necessary, but
the back two will need to be used to level the wing so
that it is ush with the replace face. See Fig. 26.
9. Install the completed frame/surround assembly into
the rebox and level/plumb the wing to the replace
face using the leveling bolts as jacks.
Fig. 24
Fig. 25
3/8 x 16 tapped
leveling bolt holes
Fig. 26
1/2" threaded
wedging rods
(5) bolt down holes
Connecting the room sensor as a return air sensor

14
* Floor protection must be used from hearth opening
to 6" (152mm) in front of door glass and 6" (152mm)
to each side of the stove body to protect combustibles
from hot ashes. A minimum size will be 16.5" deep by
30" wide and be made of a non-combustible material or
meet UL approval.
10. Test t the cast ash lip (See g. 25) on the shell frame
mounting rails. The ash lip should slide on these side
rails without lifting upward off of the rails as the ash lip is
slid inward. A small clearance of about 1/16" is an ideal
space between the legs of the ash lip and the hearth.
This cast ash lip is a decorative part that does not and
should not support any weight.
11. Tighten the (2) 1/2" threaded rods up against the lintel
of the replace opening. It is also recommended to use
some form of anchoring screws through the bottom of the
shell into the hearth. There are up to 5 holes provided.
Note: It is a good idea to check the ash lip again. The
frame may have shifted when the nal anchoring was
completed. See g. 26.
12. Complete the ue piping, and outside air piping, if
used. Make sure the damper area is sealed.
WARNING! DO NOT CONNECT THIS UNIT TO ANY
AIR DISTRIBUTION DUCT OR SYSTEM.
13. If a rear exit ue conguration is used, with or
without outside air, make sure the ue pipe termination
clearances are followed as per the manufacturers
recommendations.
Installation
Flue Pipe Stub Assembly
There are three different ue pipe stubs available.
1. The unit comes standard with the largest, for use with
4” stainless steel ex pipe.
2. Part #1-00-674040 is for use with 4” PL vent starter
pipe.
3. Part # 1-00-674039 is for use with 3” PL vent starter
pipe and also for use with 3” aluminum ex duct for
outside air connections.
The ue stub assembly base is a round plate which
allows it to swivel to allow the ue pipe to exit the
mounting frame in other positions rather than straight
up. See g. 28.
Fig. 28
Twisted tie wire
With larger ue pipes this bottom edge of the insulation will
need to be trimmed to complete the wrap.
This picture shows the completed
insulation wrapped around the ue pipe
from the mounting frame upward.
Fig. 29
14. Install the ue pipe insulation wrap. See Fig. 27.
This ceramic insulation is precut to form around the ue
pipe stub, to reduce heat transfer into the area around
the rear of the hopper and motor area. This insulation
must be installed in all congurations, even if a rear
discharge is used. See Fig. 29.
CAUTION: IF THE STAINLESS STEEL FLUE PIPE DOES
NOT EXTEND FAR ENOUGH ABOVE THE OLD DAMPER
OPENING, MAKE SURE THE FIBERGLASS INSULATION
DOES NOT EXTEND UPWARD AND COVER THE PIPE
OUTLET.
Fig. 27
Ash lip
mounting
rails
Pre-cut ceramic insulation and (2) pieces of tie wire.
12" (305 mm) Mantel - Manteau de Cheminee
*3/4" trim, zero clearance to cast surround.
(from glass)
A = to sidewall
B = to 12" mantel
C = to 3/4" trim
D = to 3/4" trim
E = oor protection

15
Installation
Connecting the ground from the wing to the
stove body
• The green wire with a female terminal is the stove
body ground.
• On the combustion air inlet box there is a male ter-
minal ground.
• If service is performed on this stove, this ground
connection must be the rst one on and the last
one off.
Fig.31
Fig. 32
Fig. 33
15. Install the cast side panels by sliding them down
over the lasered hinge pin. Note: Check for rotational
swing, but nish with them in the open position. The cast
side panels may need adjustment after the stove body
is latched into place and the front door is closed.
Connecting the power cord
The white from the mounting frame connects to the
white of the insert body. The black from the mounting
frame connects to the brown of the insert body.
2 x 4
Lasered hinge pin pivoting point
Up and down clearance adjustment slots.
Cast side
panel hinge
Fig. 30
16. Place the stove body on the mounting shell gasketed
rails and insert the body into the opening far enough that
it can't tip out. Note: A service rail kit (Part #1-00-08007),
or a pair of 2 x 4's supported in front of the hearth will
make this job easier. See Fig. 31.
17. Complete the following electrical connections
(CAUTION: Disconnect the power cord.) There are 5
connections that must be completed. See Fig. 33 & 34.

16
Installation
Connecting the Room Sensor
Connecting the room sensor to the blue twisted wires
from the control board:
• (2) 3/16 inch male terminals are provided for the ends
of the room sensor wires.
• They will mate with the female terminals on the blue
twisted wires.
•These connections are “not polarity specic.”
Hopper Seal
Inspect the silicone sponge hopper to top seal gas-
ket.
Look for tears or areas where the gasket may not seal
properly to the bottom of the cast top. This only needs
to be done when the top is removed. This is NOT nec-
essary if the cast top is not removed. (Not part of any
monthly, semi-annual or annual maintenance.)
Fig. 34
Fig. 35
Docking Gasket
Every time the unit is pulled out of the mounting frame,
the orange high temperature docking gasket should be
inspected. Check for tears or signs that the gasket is
not sealing properly.
Fig. 36
19. Inspect the silicone sponge gasket on the top edge
of the hopper.
• If it is okay, put the cast top/hopper lid assembly (see
Fig. 35) into place over the hopper.
• Make sure the hopper lid is open to install the top, then
close it to keep from getting pinched in case the lid falls
unexpectedly.
• Insert the (4) 1/4-20 x 1/2 ange head bolts into the
mounting hole but do not tighten them.See page 9, g.
12.
20. "Test" the unit with the stove body pulled out. This
will allow you to see the motors in operation.
• Turn the control to the "OFF" position.
• Plug the unit into a 120 VAC 60 hz outlet.
• Turn the control to "test". All of the motors should
operate at full voltage for 60 seconds.
Note: The door must be closed for the feed motor to
operate.
• With the "Test" completed, turn the feed adjuster off
of test, and unplug the unit.
21. Inspect the ue docking gasket. See Fig. 36.
Hopper seal gasket (gray or orange)
18. Install the front door. Check the latch and
gasketing.
Docking Gasket

17
Installation
Cast Side Panel Installation
• The stove body must be pulled out of the mounting
frame several inches to install the cast side panels.
• Slide the cast side panel down over the hinge
pins.
• Slide the stove body in and latch into place.
• Note: The cast side panels must be left in the open
position to allow access to the latches.
• Slide the ash lip into place. (This would be inward
until the rear of the cast iron touches the mounting
frame front.)
• Close the cast side panels.
• Check the gap alignment and the top and bottom
gap spacing.
• The top and bottom spacing can be adjusted by
loosening the 3 bolts and sliding the hinge up or down
until the spacing suits.
• With the front door closed and latched, check the
vertical space alignment. The only method of chang-
ing or adjusting this gap is by bending (slightly) the
hinge angle. See g. 39.
• Due to the use of all cast iron parts, some small
amounts of misalignment are expected. Since some
parts are angled and some have rounded edges, this
misalignment is very seldom noticeable.
• It is very important that the cast side panels open
and close freely for control board access.
22. Slide the stove body into the mounting frame.
• Note: The two spring latches on the bottom
right and left side of the body must be in the proper
position to enter the latch holes. (See g. 37).
• Latch the (2) spring latches into place.
23. Shift the cast top/hopper lid assembly inward as far
as possible to achieve a parallel t with the surround
sides. See Fig. 39. Tighten the cast top/hopper lid
assembly bolts with a 3/8" socket. See page 9, Fig.
12.
24. Install and adjust the side panel magnets.
• In the hardware pack are (2) magnets, (2) spacers and
(2) 10-32 x 1 1/4" bolts and nuts.
• Bolt the magnets through the holes provided in the
cast ash lip.
Important: The spacer must be on top of the hole, the
magnet on top of the spacer, with the bolt going, down,
through the hole, with the nut at the bottom, under the
ash lip. See g. 38.
25. Check the t of the cast ash lip to make sure that it
can be slid in and out easily. The cast ash lip can remain
in place at this time. Note: The cast side panel hinges
can be moved upward if necessary to gain clearance
for the cast ash lip.
Fig. 37
Fig. 38
Spring Latch
Latch Hole
Magnet
Magnet
Fig. 39
Fit cast
top/
hopper lid
parallel
with
surround.
Side panel gap
Fit cast
top/
hopper lid
parallel
with
surround.

18
Wiring
Always disconnect the power cord before the unit
is pulled from the mounting frame.
As you can see, the control board is easily accessible
from the rear with the body pulled out of the frame,
even if it is only pulled out several inches.
• Always inspect the wiring harness of the 11 pin
socket (large white at plug where all of the power
wires terminate.)
• Always inspect the wiring harness where the wires
transfer from the control to the rear inside of the
body.
• Make sure there are no worn or frayed areas.
Installation
Inspect the wiring harness transition area: This is the
area that comes closest to the mounting frame as the unit
is slid in and out of the frame.
11 pin
socket
on rear
of control
board
6 amp
g l a s s
fuse
Fig. 40
Hopper lid foam
gaskets
Cast Top
Fig. 41
Log Set Option
Fig.42
Fig. 43
Install the log bracket with the two thumb screws
provided.
Center the log in the rebox opening with the bottom
front edge over the thumb screws. The log branch
tips only rest on the bracket arms for easy installa-
tion and removal.
IMPORTANT NOTE: BEFORE CLEANING THE
HEAT EXCHANGERS, THE LOG AND THE LOG
BRACKET MUST BE REMOVED.
REMINDERS
• Do not allow pellets or sawdust to build up on the
hopper lip.
• Inspect the hopper lid gasket for damage. A good
hopper lid seal is very important for proper opera-
tion.
Thumb
Screws

19
These units are pre-tested at the factory with
exactly 120 Volts A.C., 60 Hz. They are checked
and adjusted for rebox tightness, gasket leakage,
motor operation and igniter operation. The stove is
then factory set at a high adjustment. NOTE: Low
draft adjustment may be required. The factory
low draft setting may not be correct for the unit's
permanent installation conditions.
The control board on the Accentra Insert is
equipped with a low draft adjustment port. Located
on the control face just to the right of the igniter light.
See Figure 44. 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 efcient burn on low burn or "maintenance".
This voltage adjustment allows the installer to change
the low voltage set point approximately 15 volts. This
adjustment should be done by the installer during
set up because a draft meter reading is required to
insure proper set up.
If the unit is not adjusted properly, it does not cause
a safety concern. If the unit is adjusted too high, only
efciency is lost. If the unit is adjusted too low, the low
draft pressure switch will not allow the feeder motor
or the igniter to operate.
After the installation is completed, but before the rst re is lit,
check and record the high and low draft readings.
A simple draft test should be performed after
completing the ue pipe installation. To record the
results for future reference:
1. Plug unit into a 120VAC, 60 HZ outlet.
2. Close the hopper lid and front view door. Neither
pellets or a re are required for this test.
3. With the mode selector in the "OFF" position, turn
the feed adjuster to "TEST".
4. Record the high draft_____in. W.C. (Normal is
-.45 to -.55) The control will be on the High Draft for
a total of 2 minutes.
5. After 2 minutes, during the third minute of "test",
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 .30 and .35, 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 .30 even with the set screw completely
counter-clockwise.
Combustion
Motor Speed
Control
Low draft only
set point.
The small
straight
screwdriver
slot is plastic;
therefore, the
unit can be
adjusted while
in operation.
Fig.44
Low Draft Voltage Adjustment
Draft Meter bolt hole location
The head of the plug bolt can be accessed through
the bottom distribution air inlet with the cast ash lip
removed.
Fig. 45

20
Mobile Home Installation
CAUTION
THE STOVE IS HOT WHILE IN OPERATION.
KEEP CHILDREN, CLOTHING AND
FURNITURE AWAY. CONTACT MAY CAUSE
SKIN BURNS.
KEEP COMBUSTIBLE MATERIALS SUCH AS
GRASS, LEAVES, ETC. AT LEAST 3 FEET
AWAY FROM THE POINT DIRECTLY UNDER
THE VENT TERMINATION.
WARNING
When installing and operating your Harman Ac-
centra Insert, respect basic safety standards. Read
these instructions carefully before you attempt to
install or operate the Accentra Insert. Failure to do
so may result in damage to property or personal
injury and may void the product warranty.
Consult with your local building code agency
and insurance representative before you begin
your installation to ensure compliance with local
codes, including the need for permits and follow-up
inspections.
CAUTION: This appliance must be vented to
the outside.
Due to high temperatures, this stove should be
placed out of trafc and away from furniture and
draperies.
Children and adults should be alerted to the haz-
ards of high surface temperatures and should stay
away to avoid burn to skin and/or clothing.
Young children should be carefully supervised
when they are in the same room as the stove.
Clothing and other ammable materials should
not be placed on or near this stove.
Installation and repair of this stove should be
done by a qualied service person. The appliance
should be inspected before use and at least annu-
ally by a qualied service person. More frequent
cleaning will be required. It is imperative that control
compartments, burners, and circulating air pas-
sageways of this stove be kept clean.
Safety Reminders
Mobile Home Installation
Mobile home installation should be done in
accordance with the Manufactured Home and
Safety Standard (HUD), CFR 3280, Part 24.
When installing the Accentra in a mobile home
several requirements must be followed:
1. The unit must be bolted to the oor. This can be
done with 1/4" lag screws through the 5 holes in
the base plate shown in Fig. 26.
2. The unit must also be connected to outside air.
See page 22. All mobile home installations require
the use of outside air, this will increase the heating
efciency of the unit and keep it from suffering any
effects associated with room air starvation such as
poor combustion and or erratic operation. Periodically
check the air inlet for any obstructions such as snow
or ice build up.
Kitchen exhaust fans, clothes dryers and other
similar devices may cause improper operation of
the pellet stove, if, while in use, it keeps the room
in a negative pressure, thus allowing pipe joints, not
completely sealed, to leak exhaust into the room. Be
sure to allow adequate ventilation while using such
appliances
3. Floor protection and clearances must be followed.
Floor protection and clearances to combustibles must
be followed as per installation instructions for the
stove. Clearances may only be reduced by means
approved by the regulatory authority.
4. Unit must be grounded to the metal frame of the
mobile home.
5. Smoke alarms and smoke detectors are recom-
mended to be used with wood and biomass fueled
stoves. When opening the rebox door some exhaust
may escape into the room and set off the alarm. If
this should happen ventilate the room to remove the
smoke and reset the alarm, if the alarm would go off
when no one was working with the stove ventilate
the room and have your home checked to nd the
source of the leak.
CAUTION
THE STRUCTURAL INTEGRITY OF THE
MOBILE HOME FLOOR, WALL, AND CEILING/
ROOF MUST BE MAINTAINED.
WARNING
USE OF IMPROPER FUELS, FIRE STARTERS
OR ALTERING THE STOVE FOR HIGHER HEAT
OUTPUT MAY CAUSE DAMAGE TO THE STOVE
AND COULD RESULT IN A HOUSE FIRE. USE
ONLY APPROVED FUELS AND OPERATION
GUIDELINES
WARNING
MOBILE/MANUFACTURED HOME
GUIDELINES DO NOT ALLOW INSTALLATION
IN A SLEEPING ROOM.