Initial Start-Up - Ingersoll Rand VTR20 Manuel De Maintenance

Units furnished with optional dual control are equipped with a needle valve, pilot valve, and
suction 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 is released from the unloader mechanism and the
compressor starts compressing again. Continuous run is recommended if the number of motor
starts exceed 8 starts/hour.
INITIAL START UP
1. Inspect unit for any visible signs of damage that may 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.
Do not attempt to operate compressor on voltage other than that specified on order or on
compressor motor.
3. Check to make sure the two wood blocks, used for shipping purposes only, are
removed. (See Installation, Page 7).
4. Activate main disconnect switch.
5. "Jog" motor and check for proper rotation by direction arrow. If rotation is wrong, reverse
incoming power wires 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. Open receiver hand valve. The air compressor unit is now ready for use.
This unit can start automatically without warning.
IF3163 Rev A Page 14