Contaminated Products; Maintaining The Product; Filters; Periodic Checks - Grundfos MTH series Montage- Und Betriebsanleitung

5.1 Contaminated products

The product will be classified as contaminated if it
has been used for a liquid which is injurious to health
or toxic.
If you request Grundfos to service the product,
contact Grundfos with details about the liquid before
returning the product for service. Otherwise,
Grundfos can refuse to accept the product for
service.
Any application for service must include details
about the liquid.
Clean the product in the best possible way before
you return it.

5.2 Maintaining the product

Pumps installed in accordance with these
instructions require very little maintenance.
Shaft seal
The mechanical shaft seal is self-adjusting and has
wear-resistant seal rings which are lubricated and
cooled by the pumped liquid.
Pump bearings
The pump bearings are also lubricated by the
pumped liquid.
Motor bearings
The motor ball bearings are grease packed and
sealed for life. No further lubrication is necessary.
Pumps from 4 kW and up have angular contact
bearings.

5.3 Filters

Chip trays, filters, etc. must be cleaned at regular
intervals to ensure a correct flow of liquid.

5.4 Periodic checks

At regular intervals, depending on the conditions and
time of operation, the following checks must be
made:
• Check the quantity of liquid and operating
pressure.
• Check that there are no leaks.
• Check that the motor is not overheating.
• Check the tripping of the motor-protective circuit
breaker.
• Check that all controls are operating
satisfactorily.
If the above checks do not reveal any abnormal
operating details, no further checks are necessary.
Should any faults be found, check the symptoms in
section 6. Fault finding the product.
11