Start-Up And Operation; Start-Up; Operation; Maintenance And Service - Grundfos MP 1 Bedienungsanleitung

1 x 220-240 V – 15 %/+ 10 %, 50/60 Hz, PE
Fig. 12 Converter connections

8. Start-up and operation

8.1 Start-up

Switch on the electricity supply when the pump has been installed
and connected to the converter.
The display shows:
DIAG. STOP
MP 1
MOTOR VOLTS
MOTOR CURR
MOTOR FREQ
PROG 0.00r
• Press [FWD] to start the pump. See fig. 13, pos. A.
The actual motor speed [Hz] appears in the display: Parameter
MOTOR FREQ.
Fig. 13 [FWD] button
8.1.1 Speed control
The actual speed can be set in two ways.
1. Press [FWD] to start the pump.
Method 1:
2. Press [ ] to increase the speed, or press [ ] to decrease the
speed. To increase or decrease the speed in larger
increments, keep the button pressed.
Method 2:
3. Press [ENTER] to allow the user to quickly set the speed to
any given value. Press [ ] or [
[ ] or [ ] to move the cursor between digits. The default
speed setting is 25 Hz. Press [FWD] once to run the motor at
the set speed.
4. Press [STOP] to stop the pump.
10
Motor cable
Mains supply
LOCAL
0.0 V
0.0 A
0.00 Hz
MAIN
A
] to change the speed and
The MP 1 pump is not designed for continuous
operation like for instance remedial pumping.
Caution
Continuous operation may reduce the life of the
pump.

8.2 Operation

8.2.1 Setting of pump performance
When the pump speed has been changed, wait a while to let the
speed settle at the set level. Then new adjustments can be made.
8.2.2 Minimum flow
To ensure the necessary cooling of the motor, the pump should
never be set so low that it gives no water.
If the flow rate suddenly falls, the reason might be that the pump
is pumping more water than the borehole can yield. The pump
performance must immediately be reduced or the pump must be
stopped to avoid damage to the pump.
8.2.3 After use
After use, switch off the electricity supply to the converter before
the motor cable is disconnected from the converter.

9. Maintenance and service

9.1 Maintenance

If the pump is used alternately in several boreholes, it must be
decontaminated before every sampling event or before possible
storing.
Clean the pump, cable, straining wire, etc. on the outside. Then
dismantle the pump. Thoroughly clean the pump components
before reassembling the pump. See section 10. Dismantling and
assembly.
As the demineralised water (approx. 25 ml) in the motor may
have been wholly or partly replaced by the contaminated water,
it is necessary to refill the motor with demineralised water. See
section 5.4 Checking of liquid in motor.
For the replacement of wear parts including impellers, see fig. 14,
a service kit (product number 125061) is available. The kit
includes two complete pump stages. Replace the wear parts
including impellers as shown in section 10. Dismantling and
assembly.
In addition, a service kit (product number 1A5050) is available.
This kit includes wear parts for two pumps, i.e. 4 washers,
pos. 285, and 4 seals, pos. 207. See fig. 14.
Fig. 14 Wear parts