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Requirements
Electrical connections
6
Electrical connections
6.1
Requirements
Electrical connection must only be made by
qualified specialist personnel
The electrical installation must only be performed
by specialist personnel with the corresponding
qualifications.
Power supply of the module
Power is supplied to the module via the power
plug that has already been mounted; this is
performed independent of the boiler. However, the
power supply can also be securely wired to the
electronic distributor.
DANGER!
Electric shock
There are live parts on the circuit boards. If
touched, they can cause injury and
property damage.
Before beginning any work, isolate the system
completely from all power sources, ensure that it
cannot be switched back on, and verify that it is
safely isolated from supply.
CAUTION!
Flexible stranded conductors
If flexible stranded conductors are not used for the
wiring, the contacts in the plug connections will be
subjected to excessive mechanical strain. In this case,
the warranty for the electronics would become null and
void.
Only flexible stranded conductors may be used for
the wiring.
6.2
CAN bus installation
Establishing a CAN bus connection
To establish the CAN-Bus connection to the boiler,
there a two terminals and the associated cable in the
delivery scope.
Fig. 6-1: CAN-bus cable
Only clamp the "Sch" shield on one side. Do
not
connect the "+" and "Gnd" wires.
Example: connection to circuit board [GM-C]
A terminal resistor (yellow jumper) must be set at
the end of the CAN-Bus. If both CAN-Bus
terminals are allocated, the terminal resistor must be
removed on this circuit board.
In the example listed above, the terminal resistor must
be removed from the circuit board [GM-C] at [X4] and
set on circuit board [EM-C] at [X1].
