Harman Home Heating Harman Accentra Insert, Инструкция по установке и эксплуатации

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A combustion blower is used to extract the combus-
tion gases from the firebox. This causes a negative
pressure in the firebox and a positive pressure in the
venting system as shown in fig. 46. The longer the vent
pipe and more elbows used in the system, the greater
the flow resistance.
The recommended maximum flue lengths for the
Accentra Insert are as follows:
4" Stainless Steel Flex: 30 Lineal ft. Vertical*
4" PL Vent Pipe:
4" Pl Vent Pipe: 30 Lineal ft. Vertical*
4" Pl Vent Pipe: 14 ft. Vertical w/1-90
o
and 12 lineal ft. horizontal*
If additional 4" PL Vent fittings are required, the
overall length must be reduced by:
Vertical 90
o
or T: 2.5'
Vertical 45
o
: 1.5'
Horizontal 90
o
or T: 5.0'
Horizontal 45
o
: 2.5'
3" PL Vent Pipe:
20 Lineal ft. vertical*
8 Lineal ft. vertical w/1-90
o
& 8 lineal ft. horizontal*
If additional 3" PL Vent fittings are required, the
overall length must be reduced by:
Vertical 90
o
or T: 2.0'
Vertical 45
o
: 1.0'
Horizontal 90
o
or T: 4.0'
Horizontal 45
o
: 2.0'
* Long runs of flex or PL vent pipe installed directly vertical from the
flue stub may require more frequent cleaning due to fly ash falling off
inside and collecting directly above the combustion blower outlet.
Any use of horizontal venting will require more frequent cleaning.
It is the responsibility of the installer to make sure the entire flue
configuration is accessible for cleaning.
4" stainless steel flex vent piping is only allowed for
use in masonry fireplaces and chimneys or factory built
wood burning fireplaces with class A metal chimneys.
All pellet vent pipe must be secured together either by
means provided by pipe manufacturer or by 3 screws
at each joint.
venting
+ = Positive static pressure
= Negative static pressure
Fig.46
Inside
hopper
Inside
firebox
In flue pipe
In fan
chamber
& starter
collar
Use only the specified venting components. Use
of any other components will void the product
warranty and may pose a hazard.
do Not Install A Flue damper In The Exhaust
Venting System Of This Appliance.
dO NOT CONNECT ThIS uNIT TO A ChImNEY FluE
SErvINg ANOThEr APPlIANCE.
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 op-
eration. 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:
harman home heating and hearth & home Tech-
nologies 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 appli-
ances. 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 in-
take 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 con-
sume 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.