Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15
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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.
The diagram shows how to properly position and secure
the appliance (see Figure 6.11). Nailing tabs are provided
to secure the appliance to the framing members.
• 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.
• Secure the appliance to the
fl
oor by inserting two screws
through the pilot holes at the bottom of the appliance.
Nailing Flanges
(both sides)
Figure 6.11 Proper Positioning and Securing of an Appliance
