York Single Package Air Conditioner ZF150N24B7A1BAA1A3

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 and its individual shut-off valve disconnected from the gas supply piping system?

Check that all filters are installed ahead of the evaporator coil

Inspect filters for dirt and debris

Replace filters with the same size and type if necessary

Ensure the unit is not operated without filters properly installed

Verify panel latches are properly positioned to maintain an airtight seal

Natural gas may contain some propane. Propane is an excellent solvent and will quickly dissolve white lead and most standard commercial compounds. A special pipe dope must be used when assembling wrought iron or steel pipe. Shellac based compounds such as Gaskolac or Stalastic, and compounds such as Rectorseal #5, Clydes’s or John Crane may be used.

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

Check all joints for leaks with soap solution or other material suitable for the purpose. NEVER USE A FLAME.

Never test for gas leaks with an open flame. Use a commercially available soap solution made specifically for the detection of leaks to check all connections.

Confirm no leaks were detected.

If leaks are detected, describe the location and severity.

Acknowledge understanding of the fire or explosion hazard warning.

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 similar?

Is the scroll compressor producing a high noise level?

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

Remove plastic cap covering HI and LO pressure adjustment screws

Second Stage Pressure Adjustment

Set thermostat to call for second stage heat and start furnace

Adjust the second stage adjustment screw to set manifold pressure

Enter the second stage manifold pressure reading