Important Notice - Harman The Accentra Pellet Stove Installation & Operating Manual

ImPOrTANT NOTICE

3 or 4 inch Pellet Vent Pipe -
(Type PL) Must be used.
Fig.22
+ = Positive static pressure
= Negative static pressure
Fig. 23
25' Flex pipe
(part # 1-00-08543)
Inlet Cover
(part # 1-10-08542)
Fig. 24
venting
Room Sensor
Connection Ports
Outside air flex pipe
goes here
3" PL vent pipe
flue collar
Direct Vent Wall
Passthrough Kit
(part #1-00-677077)
Fig. 24b
venting
A combustion blower is used to extract the combus-
tion gases from the firebox. This causes a negative
pressure in the firebox and a positive pressure in the
venting system as shown in fig. 22. 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 walls and
ceilings. Be sure to use a starting collar to attach the
venting system to the stove. The starting collar must
be secured to the heater with a minimum of two
fasteners. The screws provided are a self-drilling type
of screw. However, due to material thickness, drilling a
3/32" pilot hole is recommended for each screw. You
may also wish to seal this connection with RTV silicone
caulking.
vent Pipe
Pellet venting pipe (also known as PL vent) is con-
structed of two layers with air space between the lay-
ers. 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 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 Accentra operates with a
positive vent pressure, we specify that the joints also
be sealed with high-temp silicone.
Outside Air
Connection to outside air is strongly recommended. It
is required for all mobile home installations, and where
building codes require.
To install outside air use 2 3/8" I.D. flex pipe, part
number 1-00-08543 (25 feet). There is a break-away
hole on the rear panel which must be removed before
connecting the flex pipe. The pipe should be run outside
and terminate to the side or below the vent pipe outlet so
the flue outlet is more than 12" from the inlet cover. The
maximum length run of this pipe is 15 feet. If a longer run
is needed, the size must be increased to 3". Inlet cover
part number 1-10-08542 should be used to keep birds,
rodents, etc. out of the pipe.
You may choose to use the optional Direct Vent Wall
Passthrough Kit (part #1-00-677077) which incorporates
venting passthrough and outside air into one component.
See Fig. 24b.
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