Storage; Installation; Assembly; Borehole Diameter - Grundfos MP 1 Bedienungsanleitung

4.2 Storage

The pumping system should be stored in a clean and dry area.
4.2.1 MP 1 pump
Storage temperature: –20 °C to +50 °C.
If the pump has to be stored after use, it must be cleaned
thoroughly before storing. See section 9. Maintenance and
service.
4.2.2 Converter
The converter should be stored in a clean and dry area.
Storage temperature: –10 °C to 45 °C.

5. Installation

5.1 Assembly

The pump can be installed either horizontally or vertically. The
pump discharge port should never fall below the horizontal plane.
See fig. 2.
Allowed
Positional requirements
Fig. 2
During operation, the pump must always be completely
submerged in the liquid.
The pump performance is controlled by changing the frequency.
The installation of a valve in the discharge pipe is unnecessary
and with regard to the water sample directly inappropriate.
If a valve has been installed anyway, make sure that the pump is
only operated against a closed valve for a very short period.
Otherwise the heat generated will cause the pump to stop.
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.

5.2 Borehole diameter

The inside diameter of the sampling borehole must be at least
50 mm. At the first sampling, it is recommended to check the
borehole for clearance by means of a calibration punch. If the
borehole diameter is larger than 80 mm, the pump can be fitted in
a flow sleeve to prevent unintended pump cut-outs. See fig. 3.
MP 1 in flow sleeve
Fig. 3
6

5.3 Water level

The dynamic water level (depth to the water level in the borehole
during operation) must not exceed 80 metres.

5.4 Checking of liquid in motor

The level of the liquid in the motor should be checked before the
pump is installed.
1. Place the pump and motor in a vertical position with the
discharge port pointing downwards (i.e. the bottom of the
motor is uppermost), and remove the filling screw. See fig. 4.
Fig. 4
2. If the water stands up to the edge of the threaded hole, no
filling is required. If not, fill demineralised water into the
motor.
To enable all air to escape, insert your finger in the pump
discharge port and lift the shaft a few times.
Not allowed
Recheck the liquid level.
3. Replace and tighten the filling screw.
The pump is now ready for installation.

5.5 Pipe connection

Pump discharge port: Rp 3/4.
A pipe or a hose can be connected to the pump.
Whenever a hose is fitted, a compression coupling must be used.
See fig. 5.
Tighten the union nut using fingers only and then give it
1 1/4 turns with a tool.
Fig. 5
If PTFE pipes or hoses or unarmoured hoses are used, a
stainless-steel straining wire is required for lowering and lifting
the pump.
Removal of filling screw
Use of compression coupling