York Single Package Air Conditioner ZJ102N24R4B5EAA1A1

Check that all filters are in place and clean

Are the filters clean and in good condition?

Clean or replace filters if necessary

Ensure filters are installed ahead of evaporator coil

Are the filters properly installed?

Is the unit operating with filters properly installed?

Connect a manometer to the outlet pressure port on the gas valve

Remove plastic cap covering HI and LO pressure adjustment screws

Set thermostat to call for second stage heat and start furnace

Adjust second stage (100% input) manifold pressure

Enter the current manifold pressure for second stage

Is the manifold pressure within the range of 3.2 to 3.8 IWG?

Adjust the second stage adjustment screw if necessary

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?

Verify that the ZJ078-150 unit is properly phased at the factory.

Is the blower rotating in the correct direction?

Is the compressor rotating in the correct direction?

Check for signs of misphasing in the scroll compressor

Is the electrical connection to the unit misphased?

Describe the corrective actions taken to change the phasing of the Field Line Connection.

Inspect the unit for any visible damage during transit.

Note the extent of the damage on the carrier’s freight bill, if applicable.

Request inspection by the carrier’s agent in writing, if damage is evident.

Ensure installation complies with enclosed instructions and applicable codes.