Thermo Products OMC-70, GMC-85 service manual

Models: GMC-85 OMC-70

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All installations and services must be performed by qualified service personnel.

IMPORTANT: Adequate combustion air must be provided under all circumstances. If the underside of the home is skirted or enclosed (e.g. by an enclosed crawlspace), the combustion air intake should exit through the side of cottage base and terminate outside of the structure. All joints and seams of supply ducts and combustion air ducts must be closed with a sealing method suitable to the application conditions and temperatures (e.g. using high temperature silicone caulk and/or aluminum tape).

If the combustion air passageway cannot terminate outside of the structure, a permanent opening with a minimum of 50 square inches of unobstructed infiltration (free area) for ventilation and combustion air must be provided to the interior of the structure. Additional make-up air may need to be supplied to the interior of the structure to compensate for exhaust fans, appliances, or vents which consume air from the interior of the structure.

Refer to the assembly installation instructions included with OMCCOT-BASE cottage base for additional information.

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Thermo Products OMC-70, GMC-85 service manual