Operation
6.4 Start-up following a shutdown period
1. If the pump is s hut down for over 1 year, take the following
measures before starting it up again:
Shutdown period
Measure
>1year For versions with rol ler
bearings wi thout lifetime
lubrication: relubri c ate
>2years Replace elasto mer seals
(O-rings, shaft sealing rings).
Replace antifriction bearings.
Tab. 10 Measures to be taken after prolonged
shutdown periods
2. Carry out all steps as for the initial start-up (→ 6.2 Start-
up, Page 20).
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 armature to the extent that the
stand-by pump reaches its operating temperature an d is
heated through evenly ( → 6.2.1 Switching on, Page 20).
22 NIT series BA-2017.03 en-U S 160-282/ 0 – 550 154
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