9
P61A Pellet Stove
vent Pipe
Pellet venting pipe (known as L or PL vent) is
constructed of two layers with air space between the
layers. This air space acts as an insulator and reduces
the outside surface temperature to allow a clearance
to combustibles of 1 to inches. The sections of pipe
lock together to form an air tight seal in most cases.
However, in some cases a perfect seal is not achieved.
For this reason and the fact that the P61A operates
with a positive vent pressure
we specify that the
joints also be sealed with silicone.
Aluminum tape
can also be used for any joint that is 1 ft. or more from
the outlet of the stove.
We cannot emphasize enough, the importance
of sealing every seam and joint in the venting system
which is inside the home. Even the smallest pin hole
can leak and when it does you will smell wood smoke
or a creosote smell in the room. If this occurs check
for leaks. Leaks are easiest to see during start-up.
Alternatively you can use a smoke pellet to leak test
the venting before lighting your first fire.
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:
harman home heating and hearth & home tech-
nologies strongly recommend attaching outside
air in all installations, especially lower level and
main floor locations.
venting
iMPORtAnt nOtice
Approved Pellet Vent Pipe Such As, Type "L"
Or "PL", Must Be Used.
= Positive Static Pressure
= Negative Static Pressure
+
+
-
+
-
Fig. 7
venting
A combustion blower is used to extract the com-
bustion gases from the firebox. This causes a negative
pressure in the firebox and a positive pressure in the
venting system as shown in Fig. 7. The longer the
vent pipe and more elbows used in the system, the
greater the flow resistance. Because of these facts we
recommend using as few elbows as possible and 15
feet or less of vent pipe. The maximum horizontal run
should not exceed 8". If more than 15 feet of pipe
is needed, the interior diameter should be increased
from 3" to 4" because a larger pipe causes less flow
resistance.
be sure to use approved pellet vent pipe
wall and ceiling pass-through fittings to go through
combustible walls and ceilings.
The use of a starting
collar is not always necessary. The first piece of pipe
must be secured, with at least 2 fasteners, to the flue
collar of the stove. The 2 screws provided are self-drill-
ing, however, drilling a /2" pilot hole for each screw
is recommended due to the material thickness.
A chiMneY MuSt be OF A tYPe SuitAble
FOR SOlid Fuel.
chiMneY And cOnnectOR MuSt be
MAintAined in gOOd cOnditiOn And kePt
cleAn.
Содержание P61A
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