90
Programming unit
Cylinder
Heating
DHW
Boiler
Accum. extraction
Select with
(
Fig. 53
Return to the previous step in the menu or cancel
a setting that has been started
Cursor keys:
Scroll through the menu or adjust values.
d
Confirm selection or save the setting made.
Call up help text in connection with the selected
menu point.
Call up the extended menu.
Heating circuit control unit
Control functions
Brief description
■
The control unit can regulate up to 3 heating circuits
using mixers M1, M2 and M3.
■
The set flow temperature of each heating circuit is
determined from the following parameters:
–
Outside temperature
–
Set room temperature
–
Operating mode
–
Heating curve slope and level
■
The flow temperature of the heating circuits is regu-
lated by opening or closing the mixers in stages.
The mixer motor control changes the actuating and
pause times subject to the control differential (control
deviation).
■
Coding addresses
that influence the heating circuit
control unit:
See codes overview.
Functions
The heating circuit flow temperature is captured by the
flow temperature sensor.
Time program
In accordance with the times programmed in the
"Heating" program, the control unit time switch regu-
lates between central heating with standard room tem-
perature and central heating with reduced room tem-
perature.
Every operating mode has its own set level.
Outside temperature
A heating curve must be set up for matching the con-
trol unit to the building and the heating system (see
page 31).
The heating curve characteristics determine the set
flow temperature subject to outside temperature.
Heating circuit pump logic (economy mode)
The heating circuit pump is switched off (set flow tem-
perature set to 0 °C) when the outside temperature
exceeds the value selected via coding address "A5".
If a remote control is installed, set the room tempera-
ture via coding address B5.
Extended economy mode
The heating circuit pump is switched off and the set
flow temperature set to 0 °C if one of the following cri-
teria is met:
■
The outside temperature exceeds the value selected
via coding address "A6".
■
The mixer has been closed for 20 min (mixer econ-
omy function, coding address "A7").
Frost protection
If the outside temperature falls below +1 °C, a flow
temperature of at least 10 °C is ensured. For change-
over, see coding address "A3", variable frost limit.
Function description
Display and operating elements
5777 985 GB
Functions
