MNL-0408
June 11, 2009
Page 7
CHAPTER 2:
PLC CONTROLLED UNIT OPERATIONS
2.1
Pre-start Checks
1. Ensure that all scheduled maintenance is completed.
2. Check compressor oil level. Refer to Chapter 3.
3. Check Emergency Stop Switch is pulled out.
2.2
Start-up Procedure
1. Verify that all connections downstream of the compressor are secure.
2. Apply electric power to the unit.
3. Pull out Emergency Shop Switch.
4. Turn the Compressor Control Switch to the ON position.
2.3
Post Start Procedures
1. Allow the compressor to build up pressure. Monitor the pressure gauge.
2. Listen to the unit as it operates. If excessive knocking or vibrations are observed shut down the unit.
3. Allow the compressor to reach full pressure.
2.4
Normal Operations
The compressor will operate automatically as needed while the Control Switch is in the ON position,
The Emergency Stop Switch is pulled out, power is applied to the control circuit and there are no fault
conditions.
2.5
Shutdown Procedures
1. Verify all bottle valves and fill valves are closed.
2. Turn the Compressor Control Switch to the OFF position.
3. Leave Emergency Stop Switch pulled out for at least 8 hours every 30 days to maintain the charge
on the internal PLC battery and preserve the PLC operating memory.
4. If the compressor is to remain idle for six months or longer, refer to the Appendix titled, Long Term
Storage for preservation instructions.
