Rotary Switch S1 - Viessmann EM-S1 Installation And Service Instructions Manual

Installation sequence

Rotary switch S1

Fig. 3
Connecting the PlusBus to the heat generator
A
jF jF
1 2 3 4
Fig. 4
Extension
A
B PlusBus to heat generator
8
B
Set rotary switch S1 to 0 (factory setting is 1).
Note
The rotary switch can be found on the PCB of the elec-
tronics module.
Note
If making the connection to the heat generator with an
external plug for the bus connection, disconnect plug
jF and connect the wires directly.
Heat generator installation and service instruc-
tions