York Single Package Cooling Unit ZD-05K00A2A1AAA1A1

Inspect the unit for visible damage during transit.

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

Request inspection by the carrier’s agent in writing.

Ensure installation complies with local, state, and national codes.

Is the furnace disconnected from the gas supply piping system?

Close main manual shut-off valve

Shut off all electric power to the unit

Remove screws holding manifold to burner supports

Open union fitting in gas supply line upstream of unit gas valve

Remove gas piping closure panel

Disconnect wiring to gas valves and spark ignitors

Remove manifold-burner gas valve assembly by lifting up and pulling back

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?

Remove the adjustment screw cap(s) on the regulator

Verification of Manifold Pressure

Enter the current manifold pressure reading

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

Describe any issues encountered during the adjustment

Use special pipe dope for assembling pipes

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

Blow out loose particles from the pipe

Ensure all gas lines external to the unit have been purged of air before initial start-up