Operating instructions

C Optolink interface
only in conjunction with the diag-
nostic adaptor (accessory) and
Vitosoft (accessory)
D ON indicator (green)
E Reset button
F User interface
G Rotary selector for standard room
temperature
H ON/OFF switch
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
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)
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.
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.
The electronic temperature limiter
inside the burner control unit limits the
boiler water temperature to 82 °C.
Weather-compensated control unit (cont.)
92
Function description
5692 672 GB