York Single Package Air Conditioner ZR102C00A2AAA50124A

Connect a manometer to the outlet pressure port on the gas valve to monitor the manifold pressure

Remove cover screws covering HI and LO pressure adjustment screws

Set thermostat to call for second stage heat and start furnace

Is the second stage manifold pressure within 3.5 IWG ± 0.3?

Check that all filters are in place

Inspect filters for dirt and debris

Ensure filters are installed ahead of evaporator coil

Is the unit operating with filters properly installed?

Gas Connection and Pressure Check

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

Verify factory phasing of Predator® units

Is the blower rotating in the correct direction?

Is the compressor rotating in the correct direction?

Is the electrical connection to the unit misphased?

Change the phasing of the Field Line Connection at the factory or field supplied disconnect to obtain proper rotation

Is the scroll compressor drawing low amperage?

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?