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= Positive static pressure
+
-
= Negative static pressure
-
Fig. 19
direct vent wall Pass-through
The harman® direct vent wall Pass-through (Part # 1-00-
677177) makes installing your harman® Pellet Stove with
outside air much easier. It is made to fit walls from 4 1/2" up
to 10 1/8" thick with a square opening of 6" to 6 1/2".
Outdoor Half
Indoor Half
14
+
+
Room Sensor Connection Ports
Outside Air Intake Connection
Inlet Cover part# 1-10-09542
venting
uSE 3 or 4 inch Pellet vent pipe- (Type Pl)
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. 19. 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". be
sure to use approved pellet vent pipe wall and ceiling
pass-through fittings to go through combustibles. Be
sure to use a starting collar to attach the venting system to
the stove. All joints for connector pipe must be fastened
with a minimum of three screws. Follow pellet vent
manufacturer instructions for properly securing each
pellet vent joint. The pellet starting collar must be
secured to the unit's flue collar.
Pellet venting pipe ( also known as PL vent ) is constructed
of two layers with an 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 1
inch. 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 Advance
operates with a positive vent pressure, we specify that the
joints also be sealed with silicone.
INSTAll vENT AT ClEArANCES SPECIFIEd bY ThE
vENT mANuFACTurEr.
ChImNEY CONNECTOr mAY NOT PASS Thru AN
ATTIC, rOOF SPACE, ClOSET, FlOOr, Or CEIlINg.
Outside air is necessary in mobile homes and where building
codes require. The benefit of outside air is mainly noticed in
small, very tight houses.
To install outside air use 3" flex pipe. 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. Inlet cover part
number 1-10-09542 should be used to keep birds, rodents,
etc. out of pipe.
vent Pipe
Outside Air
1-90-09730R29_02/14
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