Motors Suitable For Horizontal Installation; Hot Surface; Liquid Temperatures/Cooling; Electrical Connection - Grundfos MS Serie Instrucciones De Seguridad

Grundfos MMS6, MMS8000, MMS10000 and
MMS12000 submersible motors
Before fitting the motor to a pump after a
long period of storage, lubricate the shaft
seal by adding a few drops of water and
turning the shaft.

Motors suitable for horizontal installation

CAUTION

Hot surface

Minor or moderate personal injury
‐
If the pump is used for pumping hot liq-
uids (40 to 60 °C), make sure that peo-
ple cannot come into contact with the
pump and the installation, e.g. by in-
stalling a guard.

Liquid temperatures/cooling

In case the stated flow velocity cannot be achieved, a flow sleeve must be installed
For 37 kW MMS6 (only PVC windings), 110 kW MMS8000 and 170 kW MMS10000, the maximum
liquid temperature is 5 °C lower than stated in the table above. For 190 kW MMS10000, 220-250 kW
MMS12000/50 Hz and MMS12000/60 Hz, the temperature is 10 °C lower than stated.

Electrical connection

DANGER
Electric shock
Death or serious personal injury
‐
Switch off the power supply before
starting any work on the product.
‐
Make sure that the power supply can-
not be accidentally switched on.
DANGER
Electric shock
Death or serious personal injury
‐
The pump must be earthed.
‐
The pump must be connected to an ex-
ternal main switch and must be provi-
ded with means to locking it in the OFF
(isolated) position. Type and require-
ments are specified in EN 60204-1,
5.3.2
The electrical connection must be carried
out by an authorised person in accordance
with local regulations.
6
During operation, the motor must always
be completely submerged in the liquid.
Make sure that the NPSH values of the
mounted pump are fulfilled.
General
If an MS motor with temperature transmit-
ter is connected to a frequency converter,
he fuse melts and the transmitter becomes
inactive. The transmitter can no longer be
reactivated, consequently, the motor there-
after operates like one without a tempera-
ture transmitter.
To enable monitoring of the motor temper-
ature when running at frequency converter
operation, Grundfos recommends that a
Pt100 or a Pt1000 sensor be installed.
During frequency converter operation, it is
not advisable to run the motor at a fre-
quency higher than the rated frequency
(50 or 60 Hz). In connection with pump op-
eration, it is important never to reduce the
frequency (and consequently the speed) to
such a level that the necessary flow of
cooling liquid past the motor is no longer
ensured.