Installation Part 4: Installation and Start-up
54
e. Lever the tool with respect to the unit exterior wall.
This causes the mounting clamp to release the control
panel wall.
Raise the unit slightly at the corresponding side and repeat
the procedure on the other side of the unit.
The unit can now be removed.
Connecting instructions
E The controller is designed for an operating current of
AC 230 V at 50 Hz. The burner contact is potential-free
and must always be connected in series with the
mechanical boiler thermostat (if present).
E Screws on unoccupied terminal poles in the AC 230V
area must be firmly tightened for the required
air/creepage distances.
E Attention: Bus lines and sensor lines must be laid
separately, away from mains cables!
! After connecting or modifying the connections of
sensors and remote controls the controller must be
briefly switched off (mains switch/fuse). The function
of the controller is reconfigured in accordance with
the connected sensors the next time the controller is
switched on.
Notes on connecting heat generators via the CAN BUS
(also with CoCo, e.g. CAN/OT)
If the controller is not used solely as a mixer extension, i.e.
service water sensor or collector sensor [connector 1; PIN
6 - 8] is installed or 3rd heating circuit [RELAY FUNC 1 =
32] is activated, then the collector sensor [connector 1; PIN
7 + 8] must be short-circuited by a bridge if a heat genera-
tor is operated via the CAN BUS interface. This also ap-
plies if an OpenTherm HS is connected via a CoCo
CAN/OT.
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