
98
External demand
Code
Input DE1
3A:2
Input DE2
3b:2
Input DE3
3C:2
The effect on the internal circulation pump is selected
in coding address "3F" in group
"General"
.
The effect on the relevant heating circuit pump is
selected in coding address "d7" in group
"Heating cir-
cuit"
.
The minimum set boiler water temperature in case of
external demand is selected in coding address "9b" in
group
"General"
.
Venting program
During the venting program, the circulation pump will
be alternately switched on and off for 30 s at a time
over a period of 20 min.
For a certain period, the diverter valve is alternately set
towards heating and DHW heating. The burner is
switched off during the venting program.
Activate venting program: See "Venting the heating
system".
Fill program
In the delivered condition, the diverter valve is set to its
central position, enabling the system to be filled com-
pletely. After the control unit has been switched on, the
diverter valve no longer goes into its central position.
Afterwards, the diverter valve can be moved via the fill
function into the central position (see "Filling the heat-
ing system"). In this position, the control unit can be
switched off, and the system can be filled completely.
Filling with the control unit switched on
If the system is to be filled with the control unit
switched on, the diverter valve is moved in the fill pro-
gram to its central position and the pump starts.
When the function is enabled, the burner shuts down.
The program is automatically disabled after 20 min.
Screed drying
When activating screed drying, observe the informa-
tion provided by the screed manufacturer.
When the screed drying function is activated, the heat-
ing circuit pump in the heating circuit with mixer is
switched on and the flow temperature is held in
accordance with the selected profile. On completion
(30 days), the heating circuit with mixer is regulated
automatically via the set parameters.
Observe EN 1264. The report to be provided by the
heating contractor must contain the following heat-up
details:
■
Heat-up data with respective flow temperatures
■
Max. flow temperature achieved
■
Operating state and outside temperature during
handover
The various temperature profiles can be set via coding
address "F1" in the
"Heating circuit"
group.
The function continues after power failure or after the
control unit has been switched off. "Heating and DHW"
is started when screed drying is finished or if code
"F1:0" is set manually.
Temperature profile 1: (EN 1264-4) code "F1:1"
Flow temperature
°C
1
5
10
15
20
25
30
Days
50
40
30
20
10
Fig. 63
Function description
Control functions
(cont.)
5772 980 GB
Service