York Single Package Air Conditioner ZT037N00A2A1AAA1A1

Caution: Review installation for errors, leaks, or undesirable effects

Check for installation errors, leaks, or undesirable system effects

Verify blower speed changes are made by qualified personnel

Calculate new datum diameter (DD)

Adjust the variable pitch motor sheave to the new DD

Measure the CFM after adjustment

Verify if the measured CFM matches the required CFM

Check for changes in static pressure and BHP

Verify AMP draw of the blower motor

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

Remove cover screws covering HI and LO pressure adjustment screws

Second Stage Pressure Adjustment

Set thermostat to call for second stage heat and start furnace

Record the manifold pressure for second stage (100% input)

Adjust blower speed to specific static and CFM requirements

Adjust belt tension as required

Tighten blower pulley set screws

Tighten motor sheave set screws

Re-check set screws after 10-12 hours of run time

Verify that the unit is properly phased at the factory.

Is the blower rotating in the correct direction?

Is the compressor rotating in the correct direction?

Measure the amperage of the scroll compressor.

Are the suction and discharge pressures normal?

Is the noise level of the scroll compressor normal?

Close main manual shut-off valve

Open the union fitting upstream of the unit gas valve

Remove screws holding the manifold to the supports

Disconnect wiring to the gas valve

Remove the manifold & gas valve assembly