Harman Stove Company P35I - Manual (Page 13)

13 Pellets or Corn/Pellet Mixture Only
P35i Fireplace Insert
Save These Instructions 3-90-775R15_04/13
NOTE: The restriction of not venting more than
one appliance to the same flue applies to the U.S.
specifically. While it is not recommended that you use
the same chimney for more than one appliance, in
Canada certain exceptions may be made. Be sure to
contact your building code inspection official to see if
this option is allowed in your area, and to find out the
specific requirements for such an installation.
Do not connect this unit to a chimney flue
servicing another appliance.
B. Avoiding Smoke and Odors
Negative Pressure, Shut-down, and Power
Failure:
T o reduce the probability of back-drafting or burn-
back in the pellet burning appliance during power
failure or shut-down conditions, the stove must
be able to draft naturally without exhaust blower
operation. Negative pressure in the house will resist this
natural draft if not accounted for in the pellet appliance
installation.
Heat rises in the house and leaks out at upper levels.
This air must be replaced with cold air from outdoors,
which flows into lower levels of the house. Vents and
chimneys into basements and lower levels of the house
can become the conduit for air supply, and reverse
under these conditions.
Outside Air:
Hearth & Home Technologies recommend attaching
outside air in all installations, especially lower level
and main floor locations.
Per national building codes, consideration must be given
to combustion air supply to all combustion appliances.
Failure to supply adequate combustion air for all
appliance demands, may lead to back-drafting of those
and other appliances.
When the appliance is side-wall vented: The air intake
is best located on the same exterior wall as the exhaust
vent outlet and located lower on the wall than the
exhaust vent outlet.
When the appliance is roof vented: The air intake is
best located on the exterior wall oriented towards the
prevailing wind direction during the heating season.
The outside air connection will supply the demands of
the pellet appliance, but consideration must be given to
the total house demand. House demand may consume
some air needed for the stove, especially during a power
failure. It may be necessary to add additional ventilation
to the space in which the pellet appliance is located.
Consult with your local HVAC professional to determine
the ventilation demands for your house.
The outside air kit consists of a flue stub pipe, fiberglass
gasket, silicone gasket, intake box and a section of flex
pipe.
An adjustable chimney intake extension, part # 1-00-
674104 is available to be used on masonry chimneys
only.
To install outside air, use kit part number 1-00-774280.
Follow the installation instructions provided with the kit.
Vent Configurations:
To reduce probability of reverse drafting during shut-
down conditions, Hearth & Home Technologies strongly
recommends:
• Installing the pellet vent with a minimum vertical run
of five feet, preferably terminating above the roof line.
• Installing the outside air intake at least four feet below
the vent termination.
To prevent soot damage to exterior walls of the house
and to prevent re-entry of soot or ash into the house:
• Maintain specified clearances to windows, doors,
and air inlets, including air conditioners.
• Vents should not be placed below ventilated soffits.
Run the vent above the roof.
• Avoid venting into alcove locations.
• Vents should not terminate under overhangs, decks
or onto covered porches.
• Maintain minimum clearance of 12 inches from
the vent termination to the exterior wall. If you see
deposits developing on the wall, you may need
to extend this distance to accommodate your
installation conditions.
Hearth & Home Technologies assumes no
responsibility for, nor does the warranty extend
to, smoke damage caused by reverse drafting of
pellet appliances under shut-down or power failure
conditions.
Do not connect this unit to any air distribution
duct or system.