CLIVET CFK 007.0 Manuel D'installation Et Utilisation page 131

Wiring diagrams with XYE port (BUS communication)
CC2 - 2-pipe system (size 007.0, 011.0 and 015.0)
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