137
You can select the direction of the operating program
changeover in parameter d5 in the
"Heating circuit"
group:
Operating program changeover
Parameter
Changeover towards "Continually re-
duced" or "Continuous standby mode"
(subject to the selected set value)
d5:0
Changeover towards "Continuous heat-
ing mode"
d5:1
The duration of the operating program changeover is
set in parameter F2 in the
"Heating circuit"
group:
Operating program changeover
Parameter
No operating program changeover
F2:0
Duration of the operating program
changeover 1 to 12 hours
F2:1 to
F2:12
The operating program changeover is enabled for as
long as the contact is closed. As a minimum, it is ena-
bled until the time set in parameter F2 has expired.
External blocking
The functions "External blocking" and "External block-
ing" and "Fault message input" are implemented via
the EA1 extension. There are 3 inputs available at the
EA1 extension (DE1 to DE3).
The function is selected via the following parameters in
the
"General"
group:
External blocking
Parameter
Input DE1
3A:3
Input DE2
3b:3
Input DE3
3C:3
External blocking and fault message
input
Parameter
Input DE1
3A:4
Input DE2
3b:4
Input DE3
3C:4
The effect on the internal circulation pump is selected
in parameter 3E in the
"General"
group.
The effect on the relevant heating circuit pump is
selected in parameter d6 in the
"Heating circuit"
group.
External demand
The "External demand" function is implemented via the
EA1 extension. There are 3 inputs available at the EA1
extension (DE1 to DE3).
The function is selected via the following parameters in
the
"General"
group:
External demand
Parameter
Input DE1
3A:2
Input DE2
3b:2
Input DE3
3C:2
The effect on the internal circulation pump is selected
in parameter 3F in the
"General"
group.
The effect on the relevant heating circuit pump is
selected in parameter d7 in the
"Heating circuit"
group.
The set minimum boiler water temperature for external
demand is selected in parameter 9b in the
"General"
group.
Venting program
During the venting program, the circulation pump will
be alternately switched on and off for 30 s over a
period of 20 min.
The 3-way diverter valve alternates for a certain period
between heating and DHW heating. The burner is
switched off during the venting program.
Activating the venting program: See "Venting the heat-
ing system".
Fill program
In conjunction with the commissioning assistant, the
system can be filled completely. The 3-way diverter
valve is in its central position.
Function description
Control functions
(cont.)
5789 302 GB
Functions
Summary of Contents for B2TB
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