5 Electrical connections
General
The electrical wiring must comply with the local regulations. The air dryer must be
earthed and protected by fuses against short-circuiting. Consult the electric
diagram delivered with the dryer.
Before switching on the main power supply, check the voltage requirements in the
technical specifications or on the dryer’s data plate.
Refer to section Electric diagram.
Controller description
The controller is used to power two mains voltage solenoid valves, which are used as pilot valves to the
main exhaust diaphragm valves. In standard configuration, each solenoid valve is alternately energised for
120 seconds out of a half cycle time of 170 seconds. When the valve is not energised, the main exhaust
diaphragm valve is closed, meaning that the tower to which it is linked is pressurised. The two green LED's
on the display reflect the operation of the towers: the green LED is illuminated when the corresponding
tower is pressurised.
Instruction book
2920 7083 21 23
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