York Single Package Cooling Unit ZD-05H00A2A1AAA1A1

Remove the adjustment screw cap(s) on the regulator

Enter the current manifold pressure reading

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

Describe any deviations from the expected manifold pressure

Check that all filters are in place and clean

Replace filters if cleaning is not possible

Ensure filters are installed ahead of evaporator coil

Verify that the correct number and size of filters are installed

Verify that ZE units are properly phased at the factory.

Is the blower rotating in the correct direction?

Is the compressor rotating in the correct direction?

Measure the amperage of the scroll compressor.

Are the suction and discharge pressures similar?

Is the scroll compressor producing a high noise level?

Gas Connection and Pressure Check

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

Check all joints for leaks using soap solution or other suitable material. Ensure the following joints are checked:

Was a commercially available soap solution used for leak detection?

Inspect the unit for possible damage during transit

Note the extent of any damage on the carrier’s freight bill

Request inspection by the carrier’s agent in writing

Is the product installed in compliance with the enclosed installation instructions?

Is the product installed in compliance with applicable local, state, and national codes?

Is the furnace and its individual shut-off valve disconnected from the gas supply piping system during pressure testing above 1/2 PSIG?