York Single Package Cooling Unit ZE036E12B2A1ABA1A1

Check the number and size of filters needed for the unit

Inspect filters for dirt and debris

Replace filters if they cannot be cleaned

Ensure filters are installed ahead of evaporator coil

Verify that filters are of the same size and type as required

Check that panel latches are properly positioned to maintain an airtight seal

Ensure all safety precautions are in place

Remove screws holding the manifold to the burner supports

Open the union fitting in the gas supply line

Remove the gas piping closure panel

Disconnect wiring to the gas valves and spark ignitors

Remove the manifold-burner gas valve assembly

Check burners for accessibility and service

Reverse the procedure to replace the assemblies

Ensure burners are level and seated at the rear of the heat exchanger

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

Check belt tension at least two times during the first 24 hours of operation

Re-tighten nuts (A) after adjusting

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?

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.

Ensure installation complies with enclosed instructions and applicable codes.

Is the furnace and its individual shut-off valve disconnected from the gas supply piping system?