Carrier HVAC Unit 48TFE014

Remove the combustion blower wheel and motor assembly

Remove the flue cover to inspect the heat exchanger

Clean all surfaces using a wire brush

Shut off power to unit and tag disconnect

Slide out burner section side panel

Disconnect gas piping at unit gas valve

Remove wires connected to gas valve and mark each wire

Remove wires from ignitor and sensor wires at the Integrated Gas Unit Controller (IGC)

Remove the 2 screws that attach the burner rack to the vestibule plate

Slide the burner tray out of the unit

Reinstall the gas train by reversing the procedure

Shut off unit power supply and tag disconnect

Adjust fan height as shown in Fig. 48

Remove evaporator coil access panel

If economizer is installed, remove economizer by disconnecting Molex plug and removing economizer mounting screws

Clean coil using a commercial coil cleaner or dishwasher detergent in a pressurized spray canister

Wash both sides of coil and flush with clean water

Backflush toward return-air section to remove foreign material

Ensure not to overflow the evaporator drain condensate pan

Flush condensate pan after completion

Inspection and Initial Cleaning

Shine a flashlight into draft hood opening to inspect blower wheel

Remove the 6 screws attaching induced-draft motor housing to vestibule plate

Is additional cleaning required?