Operating manual- SAB 355 (including ATEX)
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Restarting compressor unit after control power interruption (plant power failure)
•
Check variable set points.
•
Follow normal start-up procedure.
6.23
Stopping routine
Brief stop
The compressor can be stopped at any capacity setting. However, under normal conditions it is
recommended to reduce the capacity to a minimum before stopping the compressor.
Leave all valves in their “in-operation positions”. Do not turn off the power to the screw compres-
sor unit as the oil heater must be connected to keep the correct oil temperature.
Shutting down for a long period
Follow the
Brief stop
instructions and:
•
Disconnect oil heater
•
Close suction and discharge valve
(and liquid line for ECO and liquid injection) (optional)
To perform servicing and repair work, the necessary valves must be closed.
To reduce the risk of bearing damage, it is recommended to rotate (to a new position) the motor
and compressor on a monthly basis. If the screw compressor unit is exposed to vibrations during
a long shutdown period, the interval should be changed to weekly.
Avoid high vibration level.
6.24
Long-term storage
Long-term storage (6 months to 5 years) provisions are required, regardless of the storage envi-
ronment, if start-up and/or useful operation does not take place within six (6) months of equip-
ment shipment. Special provisions may be required for storage of less than six (6) months if the
storage area is subject to unusual environments such as high humidity, large temperature
changes or dusty atmosphere.
Long-term storage of equipment may lead to the deterioration of components over the period of
time. Synthetic components in the compressor may deteriorate over time even if they are kept
flooded with oil. A warm and dry environment is essential to minimise environmental and corro-
sive damage.
For further information, contact Johnson Controls Denmark.
