Danger!
Risk of death from live connections!
When working in the electronics box of the
boiler, there is a risk of death from electric
shock. Continuous voltage is present on the
mains connection terminals, even if the main
switch is turned off.
▶ Switch the main switch off before working
on the electronics box of the boiler.
▶ Disconnect the boiler from the power
mains by disconnecting the mains plug or
by de-energising the boiler via a partition
with a contact opening of at least 3 mm (e.
g. fuses or power switches).
▶ Secure the power supply against being
switched on again.
▶ Open the electronics box only when the
boiler is disconnected from the power sup-
ply.
1. Disconnect the power supply to the boiler.
2. Secure the power supply to the boiler against being
switched back on again.
3. Connect the eBUS line to the terminals (2) of the pin
header connector in the wall socket of the communica-
tion unit.
– The polarity of the eBUS line is not relevant. If the
eBUS line connections are switched, this does not
impair communication.
4. Connect the eBUS line to the terminal block of the boiler
(1), as described in the instructions for the boiler.
Conditions: The boiler that is to be connected has a terminal "24 V = RT".
▶ Make sure that the bridge is installed between the "24 V
= RT" terminals.
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