Programming Unit; Fuse Box; Tuv Button; Fixed High Limit - Viessmann VITOTRONIC 100 GC1 Installation And Service Instructions Manual

System Components
Programming unit, Part No. 7823 990
Fuse box, Part No. 7820 175
LON communication module, Part No. 7172 173
D
D
(continued)
A A
C B
Additional information
The programming unit is inserted in the
control unit.
For setting:
heating program
set-point values
For displaying:
temperatures
operating status information
faults
The fuse box contains:

fixed high limit

adjustable high limit

fuses
heating system switch

TUV button

The communication module is inserted
A
in the control unit.
Interruption of communication is
indicated.
1 terminal resistor is inserted on each
of the first and last control unit.
C
B A Control unit or Vitocom
B Connecting cable for data transfer
between the control units (part of
standard delivery or accessory)
C Terminal resistor,
(Part No. 7143 497, see Vitotronic
050 or Vitotronic 333)
D Plug-in locations for B and C
Accessory
111