Components; Components From The Parts List - Viessmann VITOTRONIC 100 Installation And Service Instructions Manual

Components from the parts list

For parts list, see page 153.
Main PCB 230 V~
The main PCB comprises:
H Relays and outputs for controlling
pumps, actuators and the burner
H Slot for power supply unit and
boiler control unit
Main PCB low voltage
The main PCB comprises:
H Connection plug for sensors,
communication connections and
external hook−up
H Slots for electronics PCB, power
supply PCB, LON communication
module, programming unit, boiler
coding card and Optolink PCB
Power supply unit PCB
The power supply unit PCB
comprises the low voltage supply for
all electronic equipment.
Safety assembly
The safety assembly comprises:
H High limit safety cut−out
H Control thermostat
H Fuses
H ON/OFF switch
H TEST key
Electronics PCB
Microprocessor with software
When replacing the PCB:
1. Record the codes and adjustments
made at the control unit.
2. Replace the PCB.
3. Set code "8A:176", and coding
address "92" to "92:160".
Optolink/emissions test
switch PCB
The PCB comprises:
H Burner standby display
H Fault display
H Optolink laptop interface
H Emissions test switch
Emissions test switch for testing flue
gas with briefly raised boiler water
temperature.
The following functions are triggered
in position "h":
H Burner start−up
(may be delayed through fuel oil
preheating, Vitoair draught
stabiliser or flue gas damper)
H Starting all pumps
H Control of the boiler water
temperature by the "R" control
thermostat

Components

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