Manuals / Thermo Products / Household Appliance / Furnace

Thermo Products CMA3-75D36N Gaskets/Sealing Materials, C.Heat Exchanger, D.House Air Blower

Models: CMC1-75DV3N CMA3-75D36N CMA3-50D36N CMC1-75D36N CMC1-50D36N CMC1-50DV3N

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5. GASKETS/SEALING MATERIALS

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

5. GASKETS/SEALING MATERIALS

Inspect all visible gaskets for signs of degradation or liquid seepage, especially any seals which were removed as part of the inspection. Replace any suspect gaskets.

C.HEAT EXCHANGER

Inspect for corrosion, pitting, warpage, deterioration, carbon build-up and loose gaskets in the flue pipe, burner box and accessible areas of the heat exchanger.

1.CLEANING THE COIL AIR SIDE

a.Remove the blower from the blower compartment. In order to remove the blower, it will first be necessary to disconnect the furnace from the outside power supply and disconnect the blower wire harness from the furnace at the blower pan quick connect.

b.Clean the coil with a vacuum cleaner by going through the blower pan opening being careful not to bend or damage any of the fins.

c.Once all components are cleaned, they must be re-installed to their factory produced state. Any seals or joints in the flue system which have been removed or loosened must be reconnected and sealed if necessary. Do this in accordance with the installation instructions.

C.HEAT EXCHANGER1.CLEANING THE COIL AIR SIDED.HOUSE AIR BLOWERE.RETURN AIR FILTERManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual background: The inducer motor mounting plate gasket and the collector box gasket must be replaced.

D.HOUSE AIR BLOWER

Check and clean the blower wheel, housing and compartment with a vacuum. Check the motor name plate and follow the motor manufacturers instructions for lubrication, if required.

IMPORTANT: Some motors are permanently lubricated and should not be oiled. See motor name plate for specific instructions.

E.RETURN AIR FILTER

The Return Air Filter(s): Provided with this unit is a permanent type filter. This filter(s) should be inspected and when dirty, cleaned or replaced, if necessary to assure proper furnace operation. Follow the cleaning, removal and replacement procedure below.

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Thermo Products CMA3-75D36N Gaskets/Sealing Materials, C.Heat Exchanger, Cleaning The Coil Air Side, D.House Air Blower
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FAQ

How often should gaskets be inspected?

Gaskets should be inspected for signs of degradation or liquid seepage regularly, especially after removal as part of an inspection.

Can the blower be cleaned without disconnecting the furnace from the power supply?

No, the blower must be disconnected from the outside power supply before it can be removed for cleaning.

Are all motors in the furnace lubricated the same way?

No, it is important to check the motor name plate and follow the specific instructions for lubrication, as some motors are permanently lubricated and should not be oiled.