76 GV 640 Service Manual
For internal use only
8. Water cycle
8.1 Water inlet
The aquastop valve (filling valve) is opened by the electronic controls when a programme is started.
Water flows into the heat exchanger through the supply hose. The flow sensor and the free flow section
are located in the water channel of the heat exchanger for the intake of water.
Water flows over the regeneration valve in the softening equipment, either to the granule box (softening)
or into the salt box (regeneration). The drain opening of the softening equipment leads the water back
into the heat exchanger. The discharge valve has not been installed. A sealing plug instead of the dis-
charge valve ensures that water flows direct into the rinsing cavity.
When a rinsing programme is started, the aquastop valve will be activated for five seconds. Water will
not flow in before. The electronics unit waits for pulses from the impeller metre here. If no pulses follow,
an error code is shown and the programme is not started.
The program is started when pulses are received.
1 Free Flow Section
2 Water softening equipment
3 Regeneration valve
4 Drain opening
5 Impeller wheel with a flow sensor
6 Supply hose
7 Aquastop valve
8 Heat exchanger water channel
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