Technical data

140
Components – Vitocontrol-S, VD2/CT3/CM2
Components from the parts list
Line voltage motherboard
The main printed circuit board
comprises:
Relays and outputs for controlling
pumps and actuators.
Slot for power supply unit.
Low voltage motherboard
The main printed circuit board
comprises:
Connection plug for sensors,
communication connections and
external connections.
Slot for printed circuit board, LON
communication module, programming
unit and Optolink printed circuit
board.
Supplementary printed circuit
board
When replacing the printed circuit
board:
1. Record the coding and adjustments
made at the control unit.
2. Replace the printed circuit board.
3. Set coding 8A: 176, and coding
address 92 to 92: 184.
Mixing valve extension printed
circuit board
The printed circuit board comprises the
relay for controlling the mixing valve
motor and the heating circuit pump of
the mixing valve circuits.
Mixing valve extension
supplementary Printed Circuit
Board
This is plugged into the mixing valve
extension printed circuit board.
All data is processed and outputs
(relay) are selected.
Power supply unit printed circuit
board
The power supply unit printed circuit
board comprises the low voltage supply
for all electronic equipment.
Programming unit
Part No. 7823 986
Setting the:
Heating program
Set values
Switching times
Heating curve (slope and shift)
Date
Time
Economy and party mode
Codings
Displaying:
Temperatures
Operating conditions
Faults
Printed circuit board
Optolink/override switch
The printed circuit board comprises:
Burner standby display
Fault display
Optolink laptop interface
Override switch
Override switch for analyzing flue gas
with briefly raised boiler water
temperature.
The following functions are triggered in
position h:
Starting all pumps.
Mixing valve in control function.
Front panel with heating circuit
selector buttons
Display and selection of the heating
circuit.
Power ON/OFF switch
The control unit comprises:
Fuse.
Power ON/OFF switch.
Fuse
F1 6.3 A (slow), 250 V, to protect the
actuators, pumps, and all electronics.
5351 340 v1.4