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4.3 Stopping
CR
1. Turn the switch to position 0 (Off), or push switch (S1) to position 0.
2. Close air outlet valve.
3. Switch off the voltage.
If a compressor with pressure switch stops during operation because of a power failure, the pressure from the
air outlet pipe must be released by moving the switch on top of the air pressure switch to 0 to prevent the
compressor from restarting against back-pressure when the power becomes live again.
CR Contractor with Pilot Valve
1. Set the pilot valve in the unload position by turning the red handle 90 degrees. Refer to Adjustment of
pilot valve.
2. On CR Contractor units with electrical motor, move switch to position 0 or push switch (S1) to position 0.
If the compressor is not required for immediate further use, switch off the voltage at the main circuit
breaker and unplug.
3. On CR Contractor units with gas engine, stop the engine. Refer to the engine “Owner’s manual”.
4. Close the air outlet valves (AV1 and AV2). Depressurize and disconnect the air lines from the outlet
valves.
4.4 Taking out of operation
At the end of the service life of the compressor, proceed as follows:
1. Stop the compressor and close the air outlet valve(s).
2. Switch off the voltage and disconnect the compressor from the mains.
3. Depressurize the compressor.
4. Shut off and depressurize the part of the air net which is connected to the outlet valve. Disconnect the
compressor from the air net.
5. Drain the oil.
4.5 Storage after installation
Procedure
If the compressor is going to be stored without running from time to time,
protective measures must be taken.
• Protect the machine against dust and moisture, if possible in a clean, cool, dry and well ventilated area.
• Make sure that the machine is not subject to vibration.
• If the machine is stored in packing, put some vapor corrosion inhibitor (VCI) paper into the packing.
• Store the machine in its normal position, not upside down or on its side.
• If the machine is stored for 1 year or more, rotate the bearings once a month to change the position of the
roller balls in the bearings. Consult Atlas Copco Service.
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