(b) Check motor for correct direction of rotation.
(c) Turn on cooling water to oil cooler, if provided.
(d) Start the compressor.
3 NORMAL OPERATION. While the system is operating, perform the following
(a) Maintain correct oil levels.
(b) Check air discharge and lubricating oil pressures.
(c) Watch for irregular compressor performance and any unusual noise or
4 SHUTDOWN. When the compressor is to be out of service for an extended
period, coat the impellers and the inside of the housing with a heavy oil or
grease to prevent rusting and corrosion. Before returning the unit to
service, thoroughly clean all oil or grease from the compressor interior.
5 OPERATIONAL PREVENTIVE MAINTENANCE. Operational preventive maintenance
includes the following tasks.
(a) Operate the compressor within the rated capacity, otherwise
overheating of the compressor and drive may occur.
(b) On units fitted with oil coolers, ensure that the temperature of the
(c) Maintain oil levels within the limits indicated on the oil level
gauge. Insufficient oil will result in improper lubrication. Too much oil
6 PREVENTIVE MAINTENANCE INSPECTION. The following inspection schedules are
adequate for average installations.
6.1 Daily Inspection. The operator shall inspect the compressor daily for
the following conditions:
(a) Unusual noise or vibration
(b) Abnormal suction or discharge pressure or temperature
(c) Abnormal oil pressure when force-fed lubrication is provided
(d) Abnormal bearing temperatures
(e) Overheating of motor
(f) Oil leaks