Lowering The Pump; Installation Depth; Converter; Position Of Converter - Grundfos MP 1 Bedienungsanleitung

Secure the straining wire to the pump with a wire holder.
See fig. 6.
Fitting the straining wire
Fig. 6
Spiral flex or cable clips are used for fitting the cable and the
straining wire (if fitted) to the riser pipe/hose. The spiral flex or
cable clips should be fitted every 1 to 3 metres. See fig. 7.
Spiral flex
Fig. 7

5.6 Lowering the pump

Lower the pump into the borehole, taking care not to damage the
motor cable.
Do not lower or lift the pump by the motor cable.
Caution

5.7 Installation depth

During operation, the pump and motor must be completely
submerged to ensure the necessary lubrication of the shaft seal
and cooling of the motor.
If the pump pumps more water that the borehole can yield, there
is a risk that the water level falls below the level of the pump inlet
and that air is therefore sucked into the pump.
Long time of operation with water containing air
Caution may damage the pump and cause insufficient
cooling of the motor.
If a non-return valve is installed in the discharge pipe, it must be
installed at least 0.5 metres above the pump. This is necessary
to ensure that the air in the pump is compressed so much that the
pump contains water when it is being submerged.

6. Converter

6.1 Position of converter

Place the converter with cabinet in such a way
that water cannot enter into the cabinet.
Caution
Do not close the cabinet during operation.
The converter must be installed vertically to ensure free air
circulation around the unit. See fig. 8.
Make sure that the cabinet/converter cannot tip during operation.
Vertical installation of the converter
Fig. 8
7