0,2
Outside temperature in °C
Boiler water or flow temperature in °C
Slope
2,4
2,6
2,8
3,0
3,2
3,4
90
80
70
60
50
40
30
0 -5 -10 -15 -20
5
10
2,0
2,2
0,4
0,6
0,8
1,0
1,2
1,4
-30
-25
100
110
1,6
1,8
15
20
Specification
Rated voltage
230 V~
Rated frequency
50 Hz
Rated current
2 x 6 A~
Power consumption
10 W
Safety category
I
IP rating
IP 20 D to EN 60529
Ensure through design/
installation
Mode of operation
Type 1B to
EN 60 730-1
Permissible ambient temperature
– During operation
0 to+40 °C
Installation in living
spaces or boiler rooms
(standard ambient con-
ditions)
– During storage and transport
−20 to +65 °C
Rated relay output breaking capacity
sÖ
Heating circuit pump
or
Primary pump, cylinder loading sys-
tem
or
Circulation pump, flue gas/water heat
exchanger
or
Switching output
4(2) A, 230 V~
sA
Circulation pump for cylinder heat-
ing
4(2) A, 230 V~
sK
DHW circulation pump
4(2) A, 230 V~
sL
Shunt pump/boiler circuit pump
4(2) A, 230 V~
gÖ
Central fault message
4(2) A, 230 V~
gS
Motor, 3-way mixing valve, constant
return temperature raising
or
Motor, 3-way mixing valve, cylinder
loading system
0.2 (0.1) A, 230 V~
Total
Max. 6 A, 230 V~
fA
Burner
6(3) A, 230 V~
lÖ
Burner, 2-stage
1 (0.5) A, 230 V~
lÖ
Burner, modulating
0.2 (0.1) A, 230 V~
Delivered condition
■ Control with integral programming unit
■ Outside temperature sensor
■ Boiler water temperature sensor
■ Cylinder temperature sensor
■ Bag with technical documentation
Heating system with DHW cylinder
Order separately:
■ Circulation pump with check valve for regulating the cylinder tem-
perature
or
■ Vitotrans 222 cylinder loading system with mixer assembly
Communication
The LON communication module (accessories) is required for com-
munication with other control units.
9.6 Vitotronic 300, type GW2B, part no. 7498 903
Specification
Construction
The control unit comprises a standard unit, electronics modules and a
programming unit.
Standard unit:
■ ON/OFF switch
■ Test key
■ Emissions test switch
■ Optolink laptop interface
■ Temperature controller
TR 1168
or
TR 1107
■ High limit safety cut-out
STB 1169
or
STB 115408
■ Fuses
■ Operating and fault display
■ Plug connection chamber:
– Connection of external equipment via system plug
– Connection of three-phase consumers via additional contactors
Programming unit
■ Straight forward operation:
– Plain text display with graphic ability
– Large font and black/white depiction for good contrast
– Context-sensitive help
■ Operating keys:
– Navigation
– Confirmation
– Help and additional information
– Menu
Control units
(cont.)
Gas condensing boilers
VIESMANN
61
5822 449 GB
9
