CLIVET CFK 007.0 Manuel D'installation Et Utilisation page 132

Wiring diagrams with XYE port (BUS communication)
CC2 - 2-pipe system (size 021.0 and 031.0)
CC4 - 4-pipe system (size 021.0)
REMOTE ON-OFF
Dry contact
contact closed = unit OFF
contact open = unit ON
the command is activated after 1 minute; the timer led flashes quickly
REMOTE ALARM
Active alarm = 220V voltage
Unit in operation = 0V