16 Heatilator • RBV4236/RBV4842 • 4048-210 Rev K • 02/07
7
7 Appliance Preparation
Sharp Edges
• Wear protective gloves
and safety glasses during
installation.
CAUTION
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.
WARNING

A. Installing Outside Air Kit

This appliance will operate correctly only if adequate ventila-
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.
Outlet placed
higher than 3 ft
below the
termination cap
Attic space
Garage or
combustible
liquids storage
Outlet blocked by
snow, leaves, etc.
Clear area
outside
house or in
ventilated
crawl space
YES
NO
NO
NO
NO
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).
Factory-built
fireplace
Figure 7.2 Outside Combustion Air Placement
• The outside air kit can only be installed on the left side of
the appliance.
• Refer to Figures 7.1 and 7.2 for proper placement of
outside air.
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 uppermost chimney section
to the outside combustion air inlet. Reference Section 2.
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.
WARNING
Outside Air
Shield
Outside Air
Plate
Assembly
2 Wire Ties
Flexible Duct
(not supplied)
Figure 7.1 Installation of Outside Air Kit