Thermo Pride Gas/Propane Furnace Mobile Home CMC1 - Manual (Page 18)

All installations and services must be performed by qualified service personnel.
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After cutting openings in the floor, place the bottom panel in position. Mark the
square opening location on the distribution duct at the connection point of the
connector duct. Remove the bottom panel. Cut an opening in the distribution duct
slightly larger than the connector duct. (refer to Figure 2 for location of this cut.)
Cut the connector duct to length. Install the connector duct. Bend over each tab.
Insure an airtight seal by using high temperature sealant or tape on the joint.
Reinstall the bottom panel over the connector duct. Put the base top assembly in
place (see Figure-3).
Slit the corners of connector duct down to the top of the base assembly. If metal
projects more than 1-inch above the top of the base assembly, trim the flanges
down to 1-inch. While the top of distribution duct is being pulled up with one
hand, bend down each side of the connector duct tightly to the base assembly
with the other hand. This assures a tight connection between the base assembly
and the connector duct and that the distribution duct will be full size. Use high
temperature tape and/or high temperature silicone caulking on all joints and
seams to minimize air leakage. Secure the base assembly to the floor with two
screws in the front flange.
2. Cottage Base Model: 01COT BASE (for CMA3 models only)
The 01COT BASE cottage base (Figure 1C) is required for a freestanding
cottage base installation. The cottage base allows the two sides and rear to have
an 8” x 12” register installed. IMPORTANT: All joints and seams of supply
ducts must be sealed with a sealing method suitable to the application
conditions and temperatures (I.E. High temperature silicone and/or
aluminum tape). Refer to assembly and installation instructions included with
cottage base for additional information.
The model CMC does not require a base for installation. The integrated coil
cabinet serves as a base. The duct connection will be made to the bottom of the
furnace. A sheet metal cover plate may be installed to protect any exposed
combustible flooring.