Harman 300i Wood Insert
19
3-90-300101
Harman® • 300i Wood Insert Owner’s Manual_R13 • 2010 -___ • 04/15
gaskets
Gaskets are used at strategic positions for controlling the
path that incoming and outgoing air and gases take through
the insert. You must check these gaskets from time to time,
and replace them when necessary. You can test the seal
by closing the component onto a piece of paper. When
closed, the paper should not pull out of the seal without
resistance. The gaskets are made of fiberglass of different
sizes (obtainable from your Harman dealer) and are fixed in
place with a high temperature gasket cement. To change a
gasket, first remove the worn fiberglass and clean the area
with a wire brush. Also clean any other surfaces that come
into contact with the gasket. Place a small bead of cement
in the area under the gasket, then press new gasket material
into the channel; do not overlap the ends. Seat the gasket
firmly by applying pressure when possible; for example, after
changing the door gasket, close the door. Allow the cement
to dry before using your insert.
Gaskets are located on the door and between the damper
and the damper frame.
door latch
After a period of time, you may find that the front door does
not close as firmly as when your insert was new. This is
mostly due to a natural compression of the gaskets. To adjust
the latch, loosen the two bolts, and bump the retainer back.
Adjust as necessary to achieve a good seal.
The chimney connector and chimney should be inspected
at least once every 2 months during the heating season to
determine if a creosote buildup has occurred. Checking your
chimney and chimney connector more frequently, especially
while you are getting used to your insert, is recommended. To
inspect this system, let the insert cool. Using a flashlight and
mirror, check the interior of the chimney connector, and the
chimney itself. If creosote has accumulated (3mm or more)
it should be removed to reduce the risk of a chimney fire.
To clean deposits from the surface of the connector, open
the bypass damper to prevent debris from falling into the
FireDome, and clean using the appropriate brush. When
cleaning the stainless steel connector, it is recommended to
use a non-metal brush.
To clean the chimney, use a specially designed brush sized
to fit your particular flue opening, or call an established
chimney cleaning service. It is recommended that you have
your chimney professionally cleaned and inspected annually.
Any cracks or damage should be repaired before further use
of the insert.
Occasionally, it will be necessary to remove the insert to
inspect the appliance and the fireplace. To remove the insert,
you will first need to remove the two bolts that secure the
flue adapter to the top of the insert. Slide the insert out of the
fireplace for inspection. Have any cracks or damage repaired
before further use of the insert.
Do not burn any fuel other than wood, such as charcoal,
which can cause increased carbon monoxide production or
overfiring. Never use highly volatile substances in your insert,
such as gasoline, which could cause an explosion.
When solid fuels are burned completely, they produce
water and carbon dioxide. However, in long slow burns, a
substantial amount of carbon monoxide may be produced.
If allowed to build up, carbon monoxide (which is odorless)
can prove fatally poisonous. Proper ventilation and draft will
prevent this from happening. If you smell smoke, increase
the air control lever setting, and thoroughly ventilate your
dwelling. During future burns, be careful not to overload
the insert with fuel, so you will not be tempted to constantly
operate at a low air control setting.
Other causes of poor draft are icing, exhaust fans, and room
air starvation, which may occur in tightly constructed homes.
If your insert is sluggish and you get an occasional odor,
check these possibilities and increase the air flow in your
home. Dryer vents and other appliances operating in close
proximity to the insert may also create negative pressure.
proper ventilation
Always provide a source of fresh air to the room when the
insert is operating.
blowers
The blowers on your insert require very little maintenance.
You should, however, keep the air inlets and the motors and
fan blades free of dust and pet hair.
chimney system
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 flue of a slow burning fire. As a result, creosote
accumulates on the flue lining. When ignited, this creosote
makes an extremely hot fire.
The FireDome Combustion system cuts creosote to almost
nothing when properly burned with dry seasoned wood.
IMpORTANT NOTE
the only suitable method for removing creosote from
the venting system is a chimney brush. creosote
sweeping logs, powders and other products have the
potential to damage the firedome combustion system,
and are not recommended for use in harman wood
stoves. Use of chemical creosote removal products
will void the warranty of the firedome combustion
system.
