York Single Package Cooling Unit ZD-03C00A2A1AAA1A1

Remove the adjustment screw cap(s) on the regulator

Enter the current manifold pressure (IWG)

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

Describe any deviations from the expected manifold pressure

Select the pipe dope used for assembling wrought iron or steel pipe

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

Blow out loose particles from the pipe

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

Verify that ZE units are properly phased at the factory.

Is the electrical connection to the unit correctly phased?

Is the compressor rotating in the correct direction?

Check for signs of misphasing in the scroll compressor

Is the line voltage at the unit point of power connection correctly phased?

Describe the corrective actions taken if misphasing was detected.

Check that all filters are in place and clean

Are the filters clean and in good condition?

Clean or replace filters if necessary

Are the filters installed ahead of the evaporator coil?

Inspect evaporator coil for frost or damage

Is the unit operating with filters properly installed?

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

Check all joints for leaks using a soap solution or other suitable material.