Connecting Several Accessories; Power Supply And Plusbus Connection - Viessmann EM-S1 Installation And Service Instructions For Contractors

Connecting several accessories

Power supply and PlusBus connection

Power supply to all accessories via heat generator control unit
A
E
Fig. 7
Some accessories with direct power supply
A
E
Fig. 8
Heat generator control unit
A
Mixer extension kit for heating circuit with
B
mixer M2 (ADIO electronics module)
Mixer extension kit for heating circuit with
C
mixer M3 (ADIO electronics module)
Further accessories
D
In the following circumstances, use the output for the
■
accessories only to switch an on-site relay:
An actuator (e.g. circulation pump) with a higher
power demand than the fuse rating required for the
accessories is connected at the accessories output.
In the following circumstances, connect one or more
■
accessories directly to the mains supply via an
ON/OFF switch:
The max. permissible total current of the control unit
for the heat generator is exceeded.
Note
In this event, the accessories concerned cannot be
isolated with the ON/OFF switch on the control unit.
B C
B C
D
D
ON/OFF switch
E
fÖ (A) Power supply
PlusBus
jF
/ Accessories power supply in the control unit of
lH aBH
the heat generator
Installation sequence
13