Lennox Cooling Unit LCH120H

Inspection and Cleaning Preparation

Ensure power to the unit is turned off

Gather necessary cleaning materials

Inspect the coil for visible dirt and debris

Clean the coil using mild detergent or commercial coil cleaner

Inspect the condition of the all-aluminum coils

Are the all-aluminum coils clean and free of debris?

Inspect the condition of the fin/tube coils

Are the fin/tube coils clean and free of debris?

Spray the coil steadily and uniformly from top to bottom with water

Ensure water pressure does not exceed 900 psi

Ensure spray angle does not exceed 45 degrees

Ensure nozzle is at least 12 inches from the coil face

Check for fractures between the fins and refrigerant tubes

Reduce pressure and work cautiously to prevent damage

Clean condenser coil with detergent or commercial coil cleaner

Shut off power supply and gas to unit

Disconnect pressure switch air tubing from combustion air inducer port

Remove screws securing combustion air inducer to flue box and retain them

Clean inducer wheel blades with a small brush

Remove combustion air inducer assembly

Remove flue box cover and clean