12
3-90-07205R26_10/14
The minimum vent configuration is a 90° or Tee on a starter
collar and a 24” length horizontal through an exterior wall. A
cap on the end should direct the flue gasses down and away
from the structure. See Fig. 5.
The maximum horizontal length is 18 feet. The minimum
termination height above the exterior grade is 18”. The
maximum total length of any configuration is 30 feet*. *(See
venting graph (Fig. 3) in this manual for exceptions)
NOTE: Cleanout Tee’s should always be used on the
transitions to horizontal pipe to allow easy access for
cleaning.
The venting graph allows for one (1) 90° or Tee fitting in any
configuration.
If more 90’s, T’s, or 45’s are needed, the total length must
be adjusted to allow for the added restriction.
Up to four (4) additional 90’s, Tee’s, or equivalent 45’s can be
added as long as the overall length is adjusted in accordance
with the values listed below.
(See
Requirements for Terminating the Venting
under the
venting section of this manual)
Each Vertical ---- 90° or T subtract 2.5 feet
Each Vertical ---- 45°
subtract 1.5 feet
Each Horizontal - 90° or T subtract 5.0 feet
Each Horizontal - 45°
subtract 2.5 feet
Any exterior venting (vent pipe exposed to outside
ambient temperatures) should be kept to a minimum,
due to potential condensation problems.
This is especially important in high humidity cold weather
climates, such as maritime areas, lake shores, and low river
valleys.
Venting
Venting
Use 4” pellet vent pipe only.
A combustion blower is used to extract the combustion
gases from the firebox. This creates a negative pressure in
the firebox and a positive pressure in the venting system as
shown in Fig. 4. 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 30 feet or less of vent pipe. The maximum horizontal run
should not exceed 18 feet.
Be sure to use wall and ceiling pass through fittings
(which are approved for pellet vent pipe ) when going
through combustible materials.
Be sure to use a starting
collar to attach the venting system to the stove.
The starting
collar must be sealed to the stove flue collar with high
temp silicone caulking or aluminum tape, and screwed
into the stove flue collar at least three (3) places.
12”
36”
-
+
Fig. 4
Vent Pipe
4” pellet vent 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 minimum clearance to combustibles
as low as 1”. In Canada the minimum clearance to
combustibles is 3”.
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 boiler operates
with a positive vent pressure,
we specify that all joints
within the structure should also be sealed with silicone.
NOTE: Use only 4” diameter approved PELLET venting
system. Be sure to inspect and clean exhaust venting
system frequently.
This is the minimum venting configuration.
Fig. 5
36”
36”
18”
4” Type “L” or
“PL” Vent pipe
Summary of Contents for PB 105
Page 51: ...3 90 07205R26_10 14...
