Lauda ECO Silver E 4 S Operation Manual page 42

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Plug in the bus connecting lead (red plug in the red sock-
–
et).
Introduce the module into the appropriate receptacle and
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fasten it using the two cross-head screws.
Insert the mains plug again and switch on the thermostat.
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The connectors have reverse-polarity protection. The plug
–
has a projection which slides into a notch on the socket.
ECO Silver 10/2019 i