Function Description; Constant Temperature Control Unit - Viessmann VITODENS 200-W Service Instructions Manual

Constant temperature control unit

Control and display elements
A B C D E
2
3
1
0 0
4
RESET
A Pressure gauge
B Fault indicator (red)
C Optolink interface
only in conjunction with the diagnos-
tic adaptor (accessory) and Vitosoft
(accessory)
Keys at the user interface:
O Set boiler water temperature
F
Set DHW temperature
O+F Emissions test function
K Standby mode
L DHW only
Heating operation
The selected set boiler water tempera-
ture will be maintained when a demand
is being raised by the room thermostat
and the heating program is set to DHW
and central heating "G".
The boiler water temperature will be
maintained at the default frost protection
temperature when there is no demand.
F
º C
+
i
OK
D ON indicator (green)
E Reset button
F User interface
G ON/OFF switch
G Heating and DHW
Comfort mode
/
b/a Setting values
d Confirmation
c Information
e Standard settings (Reset)
The electronic temperature limiter inside
the burner control unit limits the boiler
water temperature to 82 °C.
Flow temperature setting range: 40 to
74 °C.

Function description

G
87