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Fig.
7
,
together to form an air tight seal in most cases; however,
in some cases a perfect seal is not achieved. For this
8
=
Positive static pressure
8=
Negative static pressure
reason and the fact that the P61 operates with a positive
vent pressure we specify that the joints also be sealed
with clear silicone.
Pellet Vent Pipe or PL Vent Pipe Must be used.
Outside Air
Venting
A combustion blower is used to extract the com-
bustion gases from the fnebox. This causes a negative
Outside air flex pipe
1
a
1
1
goes here
Outside
air
is optional except in mobile homes and
where building codes require. The benefit of outside
air
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 recom-
mend using as few elbows as possible and 15 feet or
less of vent pipe. The maximum horizontal run should
not exceed 48". If more than 15 feet of pipe is needed,
the 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
w a l l s
and
ceilings. Be sure to use a starting collar to attach the
venting systen to the stove. The starting collar must
be sealed to the stove with high temp silicone
caulking.
Vent Pipe
Pellet venting pipe
(
also known as 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 only 3 inches. The sections of pipelock
Inlet Cover part#
3-40-08543
is mainly noticed in small very tight houses.
To install outside air use 2 318" I.D. flex pipe part
number 3-40-08543. There is a break-away hole on
the rear panel which must be removed before connect-
ing the flex pipe. The pipe should be run outside and
terminate 3 feet or more to the side or below the vent
pipe outlet. Never terminate the outside air above the
vent pipe outlet. The maximum length run of this pipe is
15 feet. If a longer run is needed the size must be in-
creased to 3". Inlet cover part number 1- 10-08542
should be used to keep birds, rodents etc.out of pipe.
HRV
When installing in a house with a Heat Reclaiming
Ventilation System (HRV) be sure the system is balanced
and is not creating a negative pressure in the house.
8
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