York Single Package Air Conditioner ZJ120C24R4B5EAA1A1

Inspect the unit for possible damage during transit

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

Request inspection by the carrier’s agent in writing

Ensure installation complies with enclosed instructions and applicable codes

Ensure main manual shut-off valve is closed and all power to the unit is shut off

Open the union fitting just upstream of the unit gas valve and downstream from the main manual shut-off valve in the gas supply line

Remove the screws holding each end of the manifold to the manifold supports

Disconnect wiring to the gas valves and spark igniters

Remove the manifold & gas valve assembly

Inspect and/or replace orifices

Remove the heat shield on top of the manifold supports to access burners

Ensure burners are level and seated at the rear of the gas orifice

Verify that the unit is 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?

Check that all filters are in place and clean

Are the filters clean and free of debris?

Do the filters need replacement?

Replace filters with the same size and type

Ensure filters are installed ahead of evaporator coil

Loosen six nuts (top and bottom) A

Ensure nuts (C) are not loosened

Use belt tension checker to apply a perpendicular force to one belt at the midpoint of the span

Enter the deflection distance obtained

Enter the deflection force applied

Enter the number of times belt tension was checked during the first 24 hours of operation