Harman Stove Company PF 100 - Manual (Page 15)

15 PF100
Outside Air
Outside air is optional, although it may be required
by some building codes. The benefit of outside air is
higher efficiency and reduced venting restrictions mainly
noticed in small and very tight houses.
To install outside air, use 2 3/4”" I.D.galvinized steel
flex pipe, part # 2-00-08544 ( 12’ 6” length) or part #
2-00-08545 ( 25’ length). There is a break-away hole
on the rear panel which must be removed before con-
necting the flex pipe. See Fig. 28. The pipe should be
run outside and terminate 3 feet or more below or 1
foot or more to the side of the vent pipe outlet. Never
terminate the outside air above the vent pipe outlet. The
maximum length of this pipe is 25 feet. Inlet cover part
number 1-10-09542 should be used to keep birds, ro-
dents etc.out of the inlet pipe. See Fig. 27.
NOTE: If outside air is installed, the inlet cover
should not be placed in an area where drifting of snow
or ice will build up, blocking the intake air supply.
The Outside Air knockout is located on the face
of the Feeder Cover. It is pre-cut except for several
small tabs. There is also a filler plate screwed to the
inside to cover the top of the hole after the Outside Air
Pipe has been installed. This will allow for removal of
the Feeder Cover without disconnecting the Outside Air
Pipe. See Fig. 28.
Only metal Intake Flex should be used for the
Outside Air Supply connection.
Only a screened or rodent protected Outside Air
Intake cover should be used as an outside weather cover.
The Outside Air Intake Pipe is inside the Feeder
Cover and to the right of the feeder motor. The 2 3/4”
steel flex pipe is made to slide over the outside of the Air
Intake Pipe. See Fig. 29. It should be held into place
with some silicone, foil tape, or a hose clamp. ( not sup-
plied )
HRV
When installing in a house with a Heat Reclaiming
Ventilation System (HRV) be sure the system is balanced
and is not creating a negative pressure in the house.
Inlet Cover part#
1-10-09542
Fig. 29
Note: If the furnace is installed with the outside air
system no adjustments to the HRV should be necessary.
Fig. 27
Outside Air Inlet Pipe
Installation
Fig. 28
Outside Air Pipe Knockout