Harman Stove Company PB 105 Installation & Operating Manual page 13

Inlet Cover part#
1-10-09542
Outside Air Pipe Outside Air Pipe
Knockout Knockout
Feeder Cover Feeder Cover
Fig. 7
Outside Air Inlet Pipe Outside Air Inlet Pipe
Hopper/Feeder Swing Hopper/Feeder Swing
Plate Knob Plate Knob
Installation
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) See Fig. 6. There is a break-
away hole on the rear panel which must be removed
before connecting the flex pipe. See Fig. 7. The pipe
should be run outside and terminate 3 feet or more be-
Fig. 6
low or 1 foot or more to the side of the vent pipe outlet.
Never terminate the outside air above the vent pipe out-
let. The maximum length of this pipe is 20 feet. Inlet
cover part number 1-10-09542 should be used to keep
birds, rodents etc.out of the inlet pipe. See Fig.6.
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. 7.
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. 8. It should be held into place with
some silicone, foil tape, or a hose clamp.
(not supplied)
Heat Reclaiming Ventilation System
(HRV)
When installing in a house with a Heat Reclaiming
Ventilation System (HRV) be sure the system is bal-
anced and is not creating a negative pressure in the house.
NOTE: If the boiler is installed with the out-
side air system no adjustments to the HRV should be
Fig. 8
necessary.
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