Venting - Harman Accentra Installation & Operating Manual
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- Installation & operating manual (49 pages) ,
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ImPOrTANT NOTICE
3 or 4 inch Pellet Vent Pipe -
(Type PL) Must be used.
-
= Positive static pressure
+
Fig. 22
-
= Negative static pressure
Fig. 23
25' Flex pipe
(part # 1-00-08543)
Inlet Cover
(part # 1-10-08542)
Fig. 24
3-90-08326R25_06/13
venting
+
+
Room Sensor
Connection Ports
Outside air flex pipe
goes here
3 " P L v e n t
pipe flue collar
Direct Vent Wall Passthrough
Kit (part #1-00-677077)
Fig. 24b
venting
A combustion blower is used to extract the combustion
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 recommend 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 three 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.
NOTE: Simpson duravent Pelletvent Pro harman®
Adapter Part #3PvP-Adhb and Pelletvent Pro harman®
Adapter Increaser Part #3PvP-X4Adhb are highly
recommended to be installed on the starter collar to
insure a proper pipe connection to the unit.
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 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.
15
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