Fitting Of Submersible Drop Cable And Motor Cable; Maximum Installation Pressure; Lowering The Pump; Frequency Of Starts And Stops - Grundfos MS Serie Instrucciones De Instalación Y Funcionamiento

7.1 Fitting of submersible drop cable and
motor cable
Before fitting the motor cable to the motor, make
sure that the cable socket is clean and dry.
To ease fitting of the cable, lubricate the rubber parts
of the cable plug with non-conducting silicone paste.
Tighten the screws holding the cable to the torques
stated:
MS 402: 2.0 Nm
MS 4000: 3.0 Nm
MS 6000: 4.5 Nm
MMS6: 20 Nm
MMS 8000: 18 Nm
MMS 10000: 18 Nm
MMS 12000: 15 Nm.
Connect the motor cable to the drop cable by use of
original Grundfos cable termination kits, such as
shrink tube type KM or cable termination kit type M0
to M4.
If necessary, shorten the motor cable to ensure that
it is always covered with pump medium prior to
making the cable jointing as described above.

7.2 Maximum installation pressure

MS 402: 150 mWC
MS 4000: 600 mWC
MS 6000: 600 mWC
MMS: 600 mWC.

7.3 Lowering the pump

Grundfos recommends checking the borehole by
means of an inside calliper before lowering the pump
to ensure unobstructed passage.
Lower the pump assembly carefully into the
borehole, taking care not to damage the motor cable
and the submersible drop cable.
Do not lower or lift by means of the
Caution
motor cable.
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7.4 Frequency of starts and stops

Motor type Number of starts
• Minimum 1 per year is
recommended.
MS 402
• Maximum 100 per hour.
• Maximum 300 per day.
• Minimum 1 per year is
recommended.
MS 4000
• Maximum 100 per hour.
• Maximum 300 per day.
• Minimum 1 per year is
recommended.
MS 6000
• Maximum 30 per hour.
• Maximum 300 per day.
• Minimum 1 per year is
recommended.
• Maximum 3 per hour.
• Maximum 40 per day.
• Minimum 1 per year is
recommended.
• Maximum 10 per hour.
• Maximum 70 per day.
• Minimum 1 per year is
recommended.
• Maximum 3 per hour.
• Maximum 30 per day.
• Minimum 1 per year is
recommended.
• Maximum 8 per hour.
• Maximum 60 per day.
• Minimum 1 per year is
recommended.
• Maximum 2 per hour.
• Maximum 20 per day.
• Minimum 1 per year is
recommended.
• Maximum 6 per hour.
• Maximum 50 per day.
• Minimum 1 per year is
recommended.
• Maximum 2 per hour.
• Maximum 15 per day.
• Minimum 1 per year is
recommended.
• Maximum 5 per hour.
• Maximum 40 per day.