Switching points
120
110
100
90
80
70
60
50
40
30
20
10
20
15
10
5
0
5
–10 15 20
Outside temperature in °C
Flow temperature in °C
A
Setting options of the high limit safety cut-out of the Vitotronic
boiler control units (delivered condition 110 °C; can be changed
to 100 or 95 °C)
For the Vitocrossal 200, type CM2, 400 to 620 kW, the high limit
safety cut-out is set permanently to 110 °C.
B
Setting options of the temperature controller (boiler water tem-
perature) for the Vitotronic boiler control units (delivered condition
95 °C)
C
Selected heating curve
D
Set maximum boiler water temperature
9.2 Components in the delivered condition
Allocation to control unit types
Vitotronic
100
200
300
300-K
Type
GC1B
GC4B
GW1B
GW2B
GW4B
MW1B
Components
Boiler water temperature sensor
x
x
x
x
x
Cylinder temperature sensor
x
x
x
x
Outside temperature sensor
x
x
x
x
Contact temperature sensor (see
accessories)
x
LON communication module (see
accessories)
Note
For the Vitotronic 100, only in multi
boiler systems
x
x
x
LON cable (see accessories)
x
Terminator (see accessories)
x
For the Vitocrossal 200, type CM2 in conjunction with the
Vitotronic 100, type GC4B and Vitotronic 300, type GW4B
The boiler water temperature sensors are included as part of the
standard boiler delivery and are connected to the burner control unit.
Boiler water temperature sensor
Specification
Lead length
3.7 m, fully wired
IP rating
IP 32 to EN 60529; ensure
through appropriate design
and installation
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
Control units
(cont.)
54
VIESMANN
Gas condensing boilers
9
5822 449 GB