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W415-0616 / B / 02.18.08
12
GENERAL VENTING
Must be an approved 3" or 4" Diameter Type "L" or "PL" vent,
vented to the outside or connect the vent to a factory built type "A"
chimney using an adaptor; and/or stainless steel chimney liner for
masonry fi replace installations. Use 4" diameter vent if vent or liner
height is over 15' or if installation is over 4,000' above sea level.
Use an approved wall thimble when passing the vent through
walls and a ceiling support/fi re stop spacer when passing the vent
through ceilings (maintain a 3" clearance to any combustibles).
The vent termination must have an approved cap (to prevent water
from entering) or a 45° downturn.
If the termination is located on a windy side of the house, a shield
is recommended to prevent soot from building up on the side of the
house.
Horizontal terminations must protrude 12" from the wall, vertical
terminations require a minimum 24" above the highest point that it
penetrates through the roof.
Depending on pellet quality, vent confi guration and air settings,
black soot may occur on the terminal wall.
TYPE OF VENT
PELLET VENT TERMINATION
VENTING THE PELLET HEATER
MAXIMUM VENTING:
Maximum venting height is 33'. Maximum horizontal offset is 10'.
Use no more than 180° of elbows (two 90' elbows, or two 45'
elbows and one 90' elbow, etc), plus termination.
PELLET VENT MUST MAINTAIN A MINIMUM 3" CLEARANCE
TO ANY COMBUSTIBLE (install vent at clearances specifi ed by
the vent manufacturer).
DO NOT CONNECT THE PELLET VENT TO A VENT OR CHIM-
NEY SERVING ANY OTHER APPLIANCE OR HEATER.
DO NOT INSTALL A FLUE DAMPER IN THE EXHAUST VENT-
ING SYSTEM OF THIS UNIT.
INSTALLING THE PELLET VENT
The vent must have a support bracket every 5' when on the exte-
rior wall.
To achieve optimum performance, keep vent runs as short as pos-
sible, especially on horizontal installations.
Figure 6
ALCOVE INSTALLATION (NPS40 ONLY)
Minimum Alcove Dimensions
Figure 7
VENT INSTALLATION:
Termination must exhaust above the air inlet elevation, and parallel
or above the exhaust output of the pellet appliance. It is recom-
mended that at least 3' of vertical pipe be installed to create some
natural draft. This is to help prevent the possibility of smoke or
odour during the appliance shut down or in the event of a power
outage.
Horizontal sections must
have a 1/4" rise every 12"
of travel if longer than 3'.
The pellet vent connec-
tions must be sealed with
HI-Temp RTV Silicone and
screwed together with at
least 3 3/8" long stainless
steel screws. Seal each
vent section by injecting
a liberal amount of 500°F
(260°C) RTV silicone
sealant into the gap. We
recommend sealing the
outside of the vent con-
nections to permit easier
access when
servicing.