York Single Package Air Conditioner ZT049Q00A2A1AAA1A1

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 a soap solution or other suitable material.

Loosen six nuts (top and bottom) A

Ensure nuts (C) are not loosened

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

Verify deflection distance is 4mm (5/32”)

Record the deflection force applied

Check belt tension at least two times during the first 24 hours of operation

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

Second Stage Pressure Adjustment

Set thermostat to call for second stage heat and start furnace

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

Is the smoke detector within the operational temperature range (-4°F to 158°F)?

Measure the pressure differential across the smoke detector's sampling and exhaust ports (in inches of water).

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

Turn off the power to the smoke detector before cleaning.

Inspect the unit for visible 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 shut-off valve disconnected from the gas supply piping system?