York Single Package Cooling Unit ZD-03L00A2A1AAA1A1

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

Check that all filters are in place and clean

Are the filters clean and in good condition?

Clean or replace filters if necessary

Are the filters installed ahead of the evaporator coil?

Is the unit operating with filters properly installed?

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

Blow out loose particles from the piping.

Ensure all gas lines external to the unit have been purged of air.

Measure deflection distance using belt tension checker

Re-tighten nuts A after adjustment

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 disconnected from the gas supply piping system?