Operating instructions for Pool control-40.net filter control unit
Page: 10 (34)
Connecting a main drain valve (ECO valve)
A main drain valve (ECO valve) or a valve for water extraction from the pool walls can be
connected to terminals U7 and U8. Connect a 2-way valve to terminal U7 and neutral
terminal N. For a 3-way valve, use terminal U7 for "OPEN" and terminal U8 for "CLOSE".
This contact is rated for a maximum load of 230V/1A.
For overflow pools with spillway, this valve is opened in ECO mode to minimize evaporation
losses.
If this valve is also meant to be opened during backwashing, then the option Backwashing -
floor drain: valve open in BW must be selected in the configuration menu.
Connecting a fault indicator
An external fault indicator can be connected to volt-free floating terminals 19 and 20. This
contact is rated for a maximum load of 230V/4A.
Connecting a flow sensor
A flow sensor or a pressure sensor can be connected between terminals 21 and 22 instead
of the factory-fitted link, to provide additional protection for the pump against dry-running.
During filtration, a certain maximum time (factory set to 10 seconds, adjustment range 5-60
sec) is allowed after the filter pump starts running before this contact must close. If the
contacts do not close in this time, the filter pump is switched off and the fault indicator light
comes on. This contact is not polled during backwashing.
The terminals carry a safety extra low voltage.
Connecting a pressure switch
A pressure switch fitted in the pressure line or in the gauge port of the central valve can be
connected to terminals 23 and 24. The backwash process starts if the floating contact of the
pressure switch is closed for at least 10 seconds.
The terminals carry a safety extra low voltage.
