Weather-Compensated Control Unit - Viessmann Vitodens 333-F Service Instructions Manual

Function description

Weather-compensated control unit

Control and display elements
A Pressure gauge
B Fault indicator (red)
C Optolink interface
only in conjunction with the diag-
nostic adaptor (accessory) and
Vitosoft (accessory)
Keys at the user interface:
A
Central heating time pro-
gram
B
DHW heating and DHW cir-
culation pump time pro-
grams (if connected to the
control unit)
H
Holiday program
D
Time/date
E
Reduced room temperature
F
Set DHW temperature
Heating operation
The control unit determines a set boil-
er water temperature subject to out-
side temperature or room temperature
(if a room temperature-dependent
remote control is connected) and to
the slope/level of the heating curve.
102
D ON indicator (green)
E Reset button
F User interface
G Rotary selector for standard room
temperature
H ON/OFF switch
O+F Emissions test function
K
Standby mode
L
DHW only
G
Heating and DHW
M
Party mode
N
Economy mode
b/a
Setting values
d
Confirmation
c
Information
e
Standard settings (Reset)
The determined set boiler water tem-
perature is transferred to the burner
control unit. From the set and actual
boiler water temperatures, the burner
control unit calculates the modulation
level and regulates the burner accord-
ingly.