Datasheet

■ Anti-seizing pump protection
■ Integral diagnostic system
■ Cylinder thermostat with priority
■ Control of solar DHW heating and central heating backup in con-
junction with the solar control module, type SM1
■ Auxiliary function for DHW heating (short-term heating to a higher
temperature)
■ Maintenance display
■ External starting and blocking (in conjunction with extension EA1)
Control characteristics
PI characteristics with modulating output.
Setting the heating programs
The heating system frost protection (see frost protection function)
applies to all heating programs.
The following heating programs can be selected:
■ Heating and DHW
■ Only DHW
■ Standby mode
Frost protection function
The frost protection function is active in all heating programs.
The burner is switched ON at a boiler water temperature of 5 ºC and
will be switched OFF again at a boiler water temperature of 20 ºC.
The circulation pump will be switched ON simultaneously with the
burner and switched OFF after a delay.
The DHW cylinder will be heated to approx. 20 ºC.
To protect the system against frost, the circulation pump may be star-
ted at certain intervals (up to 24 times per day) for periods of approx.
10 minutes.
Summer mode
Heating program "
w
"
The burner starts only when the DHW cylinder needs to be heated up
again.
Boiler water temperature sensor
The boiler water temperature sensor is connected to the control unit
and built into the boiler.
Specification
Sensor type Viessmann NTC, 10 kΩ at
25 °C
Permissible ambient temperature
– during operation 0 to +130 °C
– during storage and transport -20 to +70 °C
Cylinder temperature sensor
For Vitodens with primary store or solar cylinder also an additional
outlet temperature sensor.
These sensors are connected to the control unit and built into the boiler
or cylinder.
Specification
IP rating IP 32
Sensor type Viessmann NTC 10 kΩ at
25 °C
Permissible ambient temperature
– during operation 0 to +90 °C
– during storage and transport –20 to +70 °C
Specification, Vitotronic 100
Rated voltage 230 V~
Rated frequency 50 Hz
Rated current 6 A
Protection class I
Function Type 1 B to EN 60730-1
Permissible ambi-
ent temperature
– during operation 0 to +40 °C
Installation in living spaces or boiler rooms
(standard ambient conditions)
– during storage
and transport –20 to +65 °C
Electronic tempera-
ture limiter setting
(heating mode) 82 °C (change not possible)
Setting range for
the DHW tempera-
ture
– Vitodens with pri-
mary store 10 to 63 °C
– Vitodens with
DHW cylinder
with internal indi-
rect coil 10 to 68 °C
7.2 Vitotronic 200, type HO1A, for weather-compensated operation
Structure and functions
Modular structure
The control unit is integrated into the boiler.
The control unit comprises a standard unit, electronics modules and a
programming unit.
Standard unit:
■ ON/OFF switch
■ Optolink laptop interface
■ Operating and fault display
■ Reset button
■ Fuses
Control units
(cont.)
82
VIESMANN
VITODENS
7
5822 431 GB