Starting Up After Standstill; Test Run Of The Standby Pump (If Installed); Servicing The Product; Maintaining The Product - Grundfos MTS Serie Manual De Instrucciones

9. Starting up 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 5.1 First start-up.
9.1 Test run of the standby pump (if
installed)
A standby pump must be primed and vented.
Test run the standby 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
Minor or moderate personal injury
- Wear personal protective equipment.
CAUTION
Hot or cold liquid
Minor or moderate personal injury
- Wear personal protective equipment.
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10.1 Maintaining the product

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.

10.1.1 Periodic checks

Make the following checks at regular intervals,
depending on the operational load on the pump:
• Check that the temperature of anti-friction
bearings is lower than 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
• inlet-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, they cannot be
relubricated, and have sealing washers on both
sides.
We recommend that you replace greased-for-life
bearings every two years as a precaution,.

10.1.3 Shaft seal

MTS pumps are available with two types of shaft
seal:
• mechanical shaft seal
• shaft seal ring.
Mechanical shaft seals are subject to natural wear
which strongly depends on the operating conditions.
Therefore, general statements regarding their
service life cannot be made.
Both mechanical shaft seals and shaft seal rings
have functional leaks. In the event of major leaks,
replace the shaft seal and its auxiliary seals.