York Single Package Air Conditioner ZT061C00P1A1AAA1A1

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?

Close main manual shut-off valve

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

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

Disconnect wiring to the gas valve

Remove the manifold & gas valve assembly

Adjust blower speed to specific static and CFM requirements

Adjust belt tension as required

Tighten blower pulley set screws

Tighten motor sheave set screws

Have the set screws been re-checked after 10-12 hours of run time?

Gas Connection and Pressure Admission

Open the main shut-off valve to admit normal gas pressure to the mains.

Check all joints for leaks using soap solution or other suitable material

Ensure no open flames are used during the leak test.

Inspect the smoke detector for any visible damage or obstruction.

Measure the temperature around the smoke detector to ensure it is within operational limits (-4°F to 158°F).

Measure the pressure differential across the smoke detector's sampling and exhaust ports.

Is the pressure differential within the range of 0.01 to 1.11 inches of water?