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OPERATION (CONT’D)
Units furnished with head unloaders are equipped with a needle valve, pilot valve and head unloaders to
provide continuous run capabilities. The pilot valve acts as an automatic air switch allowing air to flow from
the receiver to the head unloader mechanism, thus actuating it. To operate unit in continuous run, open
needle valve located next to pilot valve. The pilot valve is now able to sense receiver pressure. When the
receiver pressure reaches the cut-out pressure setting of the pilot valve, the pilot valve opens and air is
released to the unloader mechanism. The compressor stops compressing air and runs unloaded until the cut-
in pressure setting of the pilot valve has been reached. At this time air released from the unloader
mechanism and the compressor starts compressing again. Continuous run is recommended if motor starts
exceed 8 starts/hour.
Initial Start Up
1. Inspect unit for any visible signs of damage that would have occurred in shipment or during installation.
2. Pull main disconnect switch to unit to assure that no power is coming into the unit. “Lock Out” or “Tag
Out” switch. Connect power leads to start.
WARNING
Do not attempt to operate compressor on voltage other than that specified on order or on
compressor motor.
3. Check compressor oil level. Add oil as required. See “Compressor Oil Specifications” Section.
NOTE
: Do not mix oil type, weights or brands.
4. Activate main disconnect switch.
5. “Jog” motor and check for proper rotation by direction arrow. If rotation is wrong, reverse input
connections on the magnetic starter.
6. Close receiver outlet hand valve and start.
7. With receiver hand valve closed, let machine pump up to operating pressure. At this stage the automatic
controls will take over. Check for proper cycling operation.
8. Check for proper operation of any options. Refer to individual option instruction sheet.
9. When the initial run period has shown no operating problems, shut unit down and recheck oil level.
10. Open receiver hand valve. The air compressor unit is now ready for use.
WARNING
This unit can start automatically without warning.
