Daikin Gas Unit DCG060140

Disconnect thermostat wires from terminals Y and W

Place a jumper wire across terminals R and G at TB1 terminal block

Measure the actual RPM using a tachometer or strobe light

Is the RPM within the specified range in Appendices A and B?

Is the air temperature rise within the range stated on the Data Plate?

Turn off the air conditioning unit

Gather cleaning materials (brush, cloth, cleaning solution)

Remove any visible debris from the drain pan

Scrub the drain pan with a brush and cleaning solution

Rinse the drain pan thoroughly with clean water

Is the drain pan free of algae and fungus?

Ensure the drive on the supply fan is set in the middle of the RPM range

Adjust the drive motor sheave pitch diameter for required airflow

Complete the air flow balancing using the variable pitched motor sheave

Replace the variable pitched motor sheave with a properly-sized fixed sheave

Ensure the fixed sheave is matching to provide longer belt and bearing life and vibration-free operation

Loosen set screw 'B' using a 5/32" Allen key.

Adjust sheave pitch diameter for desired speed (half or full turns from closed position).

Tighten set screw 'B' securely over flat.

Belt Installation and Tension Adjustment

Carefully put on belts and adjust belt tension.

Ensure all keys are in place and the set screws tight before starting drive.

Recheck set screws and belt tension after 24 hours of service.

Ensure hold-down bolts on the compressor are secure

Check that vibration grommets have been installed

Visually check all piping for damage

Check all piping for leaks and repair if necessary

Refrigerant Charge Verification

Record factory refrigerant charge from unit’s nameplate

Is the refrigerant charge level correct according to the nameplate?