Mpew Circulation Pump (With Slide Shutter, No Frequency Converter); Figure 050-8: Mpew Circulation Pump - Miele G 1 Series Technical Information

Technical Information
This pump is equipped with a winding changeover, which increases the
torque at the moment it is switched on (higher starting torque). In this state
the main winding is connected directly, and the auxiliary winding connected
indirectly via the capacitor, to the power supply. During normal operation the
efficiency is increased. The main winding is switched parallel to the capacitor.
The winding changes are made via a changeover relay on the electronic
module. At every switch-on, the changeover relay and the circulation pump
starting relay are supplied with power at the same time. The changeover
relay switches the windings with a time delay.
This circulation pump has thermal winding protection.
2.10

MPEW Circulation Pump (with Slide Shutter, No Frequency Converter)

The MPEW circulation pump (with slide shutter) is fitted with a speed sensor
(Hall sensor), B3/9, which is located between the pump housing and motor.
The pump speed can be measured via the sensor and a ring magnet
mounted on the circulation pump shaft.
The quantity of water taken in at the start of the program is measured via the
flow meter, B3/4. This basic quantity of water wets the load and settles in
certain areas such as on the bottom of cups. The lower the quantity of water
that flows back into the sump, the greater the quantity of dishes in the
appliance, as more water has been required to wet the load. The way the
circulation pump is running is used to register how much water has flowed
back to the sump. If sufficient water has returned, the pump runs evenly. With
too little water, the pump speed fluctuates. Using this feature, additional small
quantities of water are taken in until a stable motor speed is registered.

Figure 050-8: MPEW Circulation Pump

88
G 1xxx/G 2xxx
1 Slide shutter motor
2 Heater pressure switch
3 Heater elements
4 Speed sensor (load sensor)
5 Motor connection
6 Capacitor