Operation
6.4 Start-up following a shutdown period
1. If the pump is shut down for over 1 year, take the following
measures before starting it up again:
Shutdown period
Measure
>1year For versions with roller
bearings without lifetime
lubrication: relubricate
>2ears Replace elastomer seals
(O-rings, shaft sealing rings).
Replace antifriction bearings.
Tab. 9 Measures to be taken after prolonged
shutdown periods
2. Carry out the same steps as for the initial start-up
(→ 6.2 Start-up, Page 21).
6.5 Operating the stand-by pump
Stand-by pump filled and bled
Operate the stand-by pump at least once a week.
1. Completely open the suction-side armature.
2. Open the pressure-side fitting to the extent that the
stand-by pump reaches its operating temperature and is
heated evenly. (→ 6.2.1 Switching on, Page 21).
22 NI series BA-2021.06 en-US 550 113 – 146-900/E
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