Harman Accentra Pellet Insert Installation & Operating Manual page 21

In flue pipe
+
In fan
chamber
starter
collar
+
O
+ = Positive static pressure
O
- = Negative static pressure
ig.
A combustion blower is used to extract the combustion
gases from the firebox. This causes a negative pressure in
the firebox and a positive pressure in the venting system as
shown in fig. . The longer the vent pipe and more elbows
used in the system, the greater the flow resistance.
e rec mmen e ma mum
ccentra n ert are a
4" Stainless Steel Flex: 30 Lineal ft. Vertical*
4 " PL V ent Pipe:
4" Pl Vent Pipe: 30 Lineal ft. Vertical*
4" Pl Vent Pipe: 14 ft. Vertical w/1-90
a t na ent fitt n
length must be reduced by:
Vertical 90 or T: 2.5'
°
Vertical 45 : 1.5'
°
Horizontal 90 or : 5.0'
°
Horizontal 45 : 2.5'
°
3 " PL V ent Pipe:
20 Lineal ft. vertical*
8 Lineal ft. vertical w/1-90 & 8 lineal ft. horizontal*
°
a t na ent fitt n
length must be reduced by:
Vertical 90 or T: 2.0'
°
Vertical 45 : 1.0'
°
Horizontal 90 or T: 4.0'
°
Horizontal 45 : 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.
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
Inside
hopper
-
-
Inside
firebox
ue en t
and 12 lineal ft. horizontal*
°
are re u re t e
are re u re t e
screws at each oint.
V enting
e n y t e pec fie
t er c mp nent
may pose a hazard.
Do Not Install A F lue Damper In The Ex haust V enting
Sy tem
DO NOT CONNECT THIS UNIT TO A CHIMNEY
SER V ING ANOTHER APPLIANCE.
n Sm ke an
e at e re
T re uce t e pr
t e pe et urn n app ance ur n p
n c n t n t e t
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.
basements and lower levels of the house can become the
conduit for air supply, and reverse under these conditions.
Outside Air:
r t e
Hearth & Home Technologies recommend attaching
ut e a r n a
ma n r cat n
Per national building codes, consideration must be given to
combustion air supply to all combustion appliances. ailure
to supply adequate combustion air for all appliance demands,
era
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
era
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
H AC professional to determine the ventilation demands for
your house.
ent n c mp nent
t e pr uct
pp ance
r
ure S ut- n an
a ty ack- ra t n
er a ure r
e mu t e a e t
ents and chimneys into
n ta at n e pec a y
2 1
e any
arranty an
F LUE
er a ure
r urn- ack n
ut-
ra t natura y
er e e an
3 -9 0 -0 0 6 7 4 R 2 7 _ 8 /1 3