If the micro-controller of the EWD registers a malfunction, the automatic drain valve will
automatically change to alarm mode, visible on the display (5). This alarm signal can be
relayed via a potential-free contact.
EWD electrical connections
Reference Name Reference Name
L Phase NO Normally open contact
N Neutral COM Common
PE Earthing NC Normally closed contact
(1) Only on EWD 50 A
Extra electric wiring to connect
potential-free contacts and an
external test button can be
provided.
Always remove the manual or automatic drain of the water separator (WSD) or the filter
(UD+) when installing an EWD.
For detailed installation instructions, consult the Instruction Book of the EWD.
• CO sensor
The CO sensor is connected to the purifier’s controller and will trigger an alarm when the CO
level exceeds 5 ppm.
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