Apart from the IDEC SmartRelay, all you need is a pressure
switch and the float switches to control the pump. If you are
using a 3-phase AC motor, you must use a contactor relay to
switch the pump. For single-phase AC pump systems you
must provide a contactor relay if the power consumption of
the AC motor exceeds the capacity of the output relay Q1.
The power consumption of a solenoid valve is usually low
enough to allow direct controlling.
• K1 contactor relay
• Y1 solenoid valve
•S1 (n
ormally open contact) pressure switch
•S2 (n
ormally open contact) float switch
•S
3 (normally closed contact) float switch
•S
4 (normally closed contact) float switch
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