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7 7
Appliance Preparation
A. Installing Outside Air Kit Damper Assem-
bly
CAUTION! Risk of Cuts/Abrasions/Flying Debris.
Wear protective gloves and safety glasses during instal-
lation. Sheet metal edges are sharp.
WARNING! Risk of Fire/
side 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.
•
The outside air kit can only be installed on the left side
of the appliance.
•
Refer to the installation instructions provided with the
kit.
Figure 7.1
Outside Air Kit Installation
B. Gas and Electrical Connections
If applicable, ensure that gas and electrical connections
are installed at this time. Refer to Section 9 (Gas Infor-
mation) and Section 8 (Electrical Information).
22
Heatilator • NBV3630I-B, NBV3933I-B, NBV4236I-B, NBV4842I-B Installation Manual • 2376-980 Rev. F • 7/16
Asphyxiation. DO NOT draw out-
C. Securing and Leveling the Appliance
WARNING! Risk of Fire! Prevent contact with:
• Sagging or loose insulation
• Insulation backing or plastic
• Framing and other combustible materials
Block openings into the chase to prevent entry of blown-
in insulation. Make sure insulation and other materials
are secured.
DO NOT notch the framing around the appliance
standoffs.
Failure to maintain air space clearance could cause
overheating and fi re.
• Bend out nailing tabs on each side.
• Place the appliance into position.
• Keep nailing tabs fl ush with the framing.
• Level the appliance from side to side and front to back.
• Shim the appliance as necessary. It is acceptable to use
wood shims underneath the appliance.
• Secure the appliance to the framing by using nails or
screws through the nailing tabs.
• Optional: Secure the appliance to the fl oor by inserting
two screws through the pilot holes at the bottom of the
appliance.
Nailing Tabs
(both sides)
Figure 7.2
Proper Positioning and Securing of Appliance
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