Starting Up The Product After Standstill; Test Run Of The Stand-By Pump (If Installed); Servicing The Product; Maintaining The Product - Grundfos MTS Series Installation And Operating Instructions Manual

9. Starting up the product after
standstill
1. If the pump has been shut down for over six
years, take the following measures before
starting it up again:
– Replace elastomer seals (O-rings, shaft seal
rings).
– Replace anti-friction bearings in the pump.
– Replace the motor bearing, if necessary.
2. Carry out all steps as for the first start-up. See
section 4.1 First start-up.
9.1 Test run of the stand-by pump (if
installed)
Stand-by pump must be primed and vented.
Test run the stand-by pump at least once a week.

10. Servicing the product

WARNING
Electric shock
Death or serious personal injury
- Before starting any work on the product,
make sure that the power supply has
been switched off and that it cannot be
accidentally switched on.
WARNING
Moving parts
Death or serious personal injury
- Tighten the coupling screws to the
correct torque.
- Install the coupling guards securely to
the pump with the screws intended for
this purpose.
CAUTION
Corrosive liquids
Death or serious personal injury
- Wear personal protective equipment.
CAUTION
Toxic liquids
Death or serious personal injury
- Wear personal protective equipment.
CAUTION
Hot or cold liquid
Minor or moderate personal injury
- Wear personal protective equipment.
CAUTION
Hot or cold surface
Minor or moderate personal injury
- Make sure that no one can accidentally
come into contact with hot or cold
surfaces.

10.1 Maintaining the product

10.1.1 Periodic checks
Make the following checks at regular intervals,
depending on the operational load on the pump:
• Check that temperature of anti-friction bearings <
70 °C.
• Check that normal operating conditions prevail.
• Check that the pressure relief valve is working.
For trouble-free operation, always ensure the
following:
• no dry running
• no leaks
• no cavitation
• suction-side isolating valves open
• unclogged and clean filters
• sufficient pump inlet pressure
• no unusual running noises or vibrations
• no excessive leakage at the shaft seal.
10.1.2 Bearings
Intermittent operation, high temperatures and
aggressive ambient and process conditions reduce
the service life of bearings.
Deep-groove ball bearings are according to DIN 625.
The bearings are greased-for-life (cannot be
relubricated) and have sealing washers on both
sides.
As a precaution, replace greased-for-life bearings
every two years (recommended).
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