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Calibrating the System—Unload Mode
1
2
3a
3b
4
5
Use the illustrations and instructions to calibrate the
system for unload mode.
When operating the system:
•
Always start the system in auto or unload mode.
•
Always circulate enough cool water to regulate
the compressor oil temperature during operation.
•
Never operate the system with the compressor oil
temperature above 250°F (121°C).
1 Toggle the auto-sync switch to the
Unload
position.
2 Close all air discharges before calibration.
3 a. Locate the AITV, then turn it clockwise until
fully closed.
b. From the closed position, turn it 3 full turns
counterclockwise.
4 Locate the balance trim valve, then turn it
counterclockwise until fully open.
5 Idle the engine and flow water through the
pump, then engage the air clutch. The air
pressure gauge should read approximately
40 psi (2.8 bar).
Note:
Do not engage the clutch when the
engine speed is above 1,000 rpm.
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