Appliance Preparation; Installing Outside Air Kit Damper Assembly - Heatilator NB3630M Owner's Manual

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Appliance Preparation

CAUTION
Sharp Edges
• Wear protective gloves
and safety glasses during
installation.
A. Installing Outside Air Kit Damper Assembly
WARNING
Fire Risk
Asphyxiation Risk
Maintain vent clearance to combustibles as
specifi ed.
• Do not pack air space with insulation or
other materials.
• National building codes recommend
using attic shield to keep loose materials/
insulation from contacting vent.
Failure to keep insulation or other materials
away from vent pipe may cause fi re.
This appliance will operate correctly only if adequate ventia-
tion is provided to allow proper draft to the system.
An outside air kit is available as an optional feature with this
appliance. An outside air kit helps to decrease the amount
of room air taken by utilizing outside air for combustion. We
strongly recommend that it be installed.
Note: the outside air kit inlet thimble should be positioned
in a manner that will not allow snow, leaves, etc. to block
the inlet. A 3 ft. (.91 m) minimum height difference must be
maintained from the top of the uppemost chimney section to
the outside combustion air inlet. Reference Section 2.
• The outside air kit can only be installed on the left side of
the appliance.
• Refer to the installation instructions provided with the
kit.
WARNING
Fire Risk
Asphyxiation Risk
Do not draw outside combustion air from:
• Wall, fl oor or ceiling cavity.
• Enclosed space such as an attic or
garage.
• Close proximity to exhaust vents or
chimneys.
Fumes or odor may result.
16 Heatilator • Novus BV-Mesh • 4031-553 Rev F • 11/07
CAUTION
Risk of Smoke Spillage
Outside air inlet must be located to prevent blockage
from:
• Leaves
• Snow/ice
• Other debris
Blockage may cause combustion air starvation.
Figure 7.1 Outside Air Kit Installation
NO
NO
Outlet blocked by combustible
snow, leaves, etc. liquids storage
YES
Clear area
outside
house or in
ventilated
crawl space
Use only duct materials specified
by manufacturer (preferably with
short run or mainly straight duct,
except small dip for cold air trap
which will help prevent flow of cold air).
Figure 7.2 Outside Combustion Air Placement
Garage or
NO
Attic space
NO
Outlet placed
higher than 3 ft
below the
termination cap
Factory-built
fireplace