Kessel Comfort PLUS Original Operation Manual page 48

Float switch
If float switches are to be used to determine the filling level, pull the sealing plug
out, insert the M16 cable screw connection and fasten it using a counter nut. Then
pull the cable through and fasten the cover in place.
Mono float switch (non-ATEX)
Connect the ends of the float switch cables to the terminals shown.
48
ALARM
ON
OFF
A = Pump switched off (Off)
B = Switch pump on (On)
D = Alarm
Fig. [19]
Installation and operating manual
Alarm
On
O
010-700_01