10 Recirculation control
10 Recirculation control
(optional additional function)
A recirculation line means that hot water can be
quickly available at the extraction points (basin,
shower, bath, ...), even with long supply pipes. Recir-
culation control is possible with a fresh water module
or for a DHW tank.
Fig. 2-35_07-002
1 Recirculation temperature
(only visible if a recir-
culation sensor on the boiler power element is connected).
2 Start recirculation pump
(serves for immediate start
of the recirculation pump).
3 Recirculation pump settings
10.1 Settings
Fig. 2-36_07-003
Release mode
1
Always off
: The recirculation control is switched off
permanently.
Always on
: The recirculation control is switched on per-
manently. The recirculation pump is only triggered in
consideration of the parameters
Switch-on duration
and
Hold-on time
.
Time switching (
Monday-Sunday, in blocks, etc.
: In
this respect, time releases can be set for recirculation
control.
Switch-on duration / Hold-on time
2
Depending on the recirculation control selected, the
pump is cycled in consideration of these two para-
meters, i.e. alternation between
Switch-on duration
and
Hold-on time
.
Recirculation required temperature
4
Is the required temperature in the recirculation line
(only displayed when a recirculation sensor is connec-
ted).
10.2 Recirculation control - Options
i
In order to be able to make use of the following
controls, time switching (Monday-Sunday, in
blocks, etc.) must be selected for the release
type
1
.
10.2.1 Time-controlled recirculation
In the event of time-controlled recirculation, the recir-
culation pumps are triggered on a cycled basis if a time
release (
release type
1
) is present. Cycling (i.e. swit-
ching between control/no control) is conducted in
accordance with the
Switch-on duration
and
Hold-on
time
2
parameters.
Example:
- Release type =
Monday-Sunday,
- The recirculation control currently has, for example, a
time release of 06:00 to 08:00
- Switch-on duration = 30 seconds
- Hold-on time = 4 minutes
The recirculation pump runs for 30 seconds. After this,
the pump pauses for 4 minutes in order to then run for
30 seconds again. This repeats in a time release from
06:00 to 08:00. Outside the time release, the pump is
not triggered.
10.2.2 Temperature- and time-controlled recir-
culation
Temperature-controlled recirculation is only available if
a temperature sensor is connected for the recirculation
temperature. The control takes the recirculation
temperature (
required recirculation temperature
) into
Operation manual
therminator II touch
27
