York Single Package Cooling Unit ZE060E07B2A1ABA1B2

Ensure all safety precautions are in place

Remove screws holding manifold to burner supports

Open union fitting in gas supply line

Remove gas piping closure panel

Disconnect wiring to gas valves and spark ignitors

Remove manifold-burner gas valve assembly

Replace assemblies ensuring burners are level and seated

Adjust burner shutters to eliminate yellow flame

Check for proper compressor rotation

Inspect electrical connection for misphasing

Change the phasing of the Field Line Connection if necessary

Verify scroll compressor operation

Ensure proper supply air blower rotation

Check line voltage at the unit point of power connection for misphasing

Remove the adjustment screw cap(s) on the regulator

To decrease the gas pressure, turn the adjusting screw counterclockwise

To increase the gas pressure, turn the adjusting screw clockwise

Enter the current manifold pressure

Is the manifold pressure set to the factory standard of 3.50 IWG?

Note: The actual manifold pressure depends on the local fuel heating value

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 (in mm)

Enter the deflection force applied

Is the deflection force within the recommended range?