York Single Package Cooling Unit ZD-05L00A2A1AAA1A1

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?

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

Select the pipe dope used for assembling wrought iron or steel pipe

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

Is the product installed in compliance with the enclosed installation instructions?

Is the product installed in compliance with applicable local, state, and national codes?

Is the furnace and its individual shut-off valve disconnected from the gas supply piping system during pressure testing above 1/2 PSIG?

Loosen six nuts (top and bottom) A

Ensure nuts (C) are not loosened

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

Enter the deflection distance obtained (in mm)

Enter the deflection force applied

Is the deflection force within the recommended range?