York Single Package Cooling Unit ZE060H12B2A1ABA1A2

Check the number and size of filters needed for the unit

Inspect filters for dirt and debris

Replace filters if they cannot be cleaned

Ensure filters are installed ahead of evaporator coil

Verify that filters are of the same size and type as required

Check that panel latches are properly positioned to maintain an airtight seal

Check for proper compressor rotation

Inspect electrical connection for misphasing

Change the phasing of the Field Line Connection if necessary

Verify scroll compressor operation

Ensure proper supply air blower rotation

Check line voltage at the unit point of power connection for misphasing

Read the safety warning carefully

Ensure the use of appropriate pipe dope

Open the main shut-off valve to admit normal gas pressure

Check all joints for leaks using soap solution

Confirm no open flames are used during the leak test

Remove the adjustment screw cap(s) on the regulator

To decrease the gas pressure, turn the adjusting screw counterclockwise

To increase the gas pressure, turn the adjusting screw clockwise

Enter the current manifold pressure

Is the manifold pressure set to the factory standard of 3.50 IWG?

If the manifold pressure is not set to 3.50 IWG, describe the adjustments made

Clean all piping of dirt and scale by hammering on the outside of the pipe.

Blow out loose particles from the piping.

Have all gas lines external to the unit been purged of air?