Additional information
96
System components
(continued)
Front panel with heating circuit selector buttons, Part No. 7818 623
For displaying and selecting the
heating circuit.
Fuse box, Part No. 7820 172
The fuse box contains:
Fixed high limit
Adjustable high limit
Fuses
Heating system switch
TEST button
LON communication module, Part No. 7172 173
Accessory
A
Control unit or Vitocom 300
B
Connecting cable for data transfer
between the control units
(accessory)
C
Terminal resistor,
Part No. 7143 497
The communication module is
inserted in the control unit.
Interruption of communication is
indicated.
1 terminal resistor is inserted on
each of the first and last control
units.
5285
941
-
0
1
LON
LON
A
A
LON
LON
LON
B
C
A
LON
B
C
