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B. Prepare For Heat Management
NOTICE: Additional clearances are required for heat
management systems installations. Provisions must be
made in advance to ensure fit within the framing.
• Heat management systems include Heat-Zone
Heat-Out-Gas. Other systems may be available. Contact
your dealer for information.
• Locate the knockouts on the left and right sides of the
appliance. Either one or two heat management may be
installed. Remove the knockout(s) from the appliance
with a tin snips.
• Center the duct collar around the exposed hole and
attach it to the appliance with 3 screws.
Note: Do this BEFORE final positioning of the appliance.
• Determine the location for the air register/fan housing
assembly.
Reference the appropriate instructions included with the
kit for the remaining installation steps.
36
Heatilator • NNXT33-IFT, NNXT33L-IFT, NNXT36-IFT, NNXT36L-IFT Installation Manual • 2628-980 Rev. C • 8/20
C. Securing and Leveling the Appliance
Gas and
®
DO NOT remove standoffs or notch the framing
around the appliance standoffs.
Failure to maintain air space clearance could
cause overheating and fire.
Block openings into the chase to prevent entry
of blown-in insulation. Make sure insulation and
other materials are secured.
The diagram shows how to properly position and secure
the appliance. See Figure 6.12. 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 flush 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. Use a minimum of one
fastener per nailing tab.
• Optional: Secure the appliance to the floor by inserting
two screws through the pilot holes at the bottom of the
appliance.
Figure 6.12 Proper Positioning and Securing of an Appliance
WARNING
Risk of Fire!
Prevent contact with:
• Sagging or loose insulation
• Insulation backing or plastic
• Framing and other combustible
materials
NAILING TABS
(BOTH SIDES)
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