Relay for automatic air introduction – compressor control for hydro – pneumatic tanks.
Power the relay (green led on – A.1)
When the liquid level reaches the level of the minimum level probe (terminal 6), starts the timing “t”. Once is concluded “S.1” is activated (borne 3) provided the control (8-9) is closed – switch on red Led.
The “S1” contact disarms when the liquid level drops below the minimum level of the probe (terminal 6) – switches off the red LED.