York Single Package Air Conditioner ZR150C00A2AAA50124A

Review installation for errors, leaks, or undesirable system effects

Check blower speed changes for substantial changes in static pressure and BHP

Ensure only qualified personnel make blower speed changes

Calculate new datum diameter (DD)

Adjust the variable pitch motor sheave to achieve the required CFM

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?

Loosen six nuts (top and bottom) A

Ensure nuts (C) are not loosened

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

Enter the deflection distance obtained

Use a straight edge from sheave to sheave as reference line to determine deflection distance from normal position

Record the recommended deflection force for the belt section

Was the belt tension checked at least two times during the first 24 hours of operation?

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

Is the furnace disconnected from the gas supply piping system?

Enter the pressure of the gas supply piping system

Is the pressure of the gas supply piping system equal to or less than 1/2 PSIG?

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

Remove cover screws covering HI and LO pressure adjustment screws

Set thermostat to call for second stage heat and start furnace

Enter the current manifold pressure for second stage (100% input)