en
24
Installation
Commissioning
Adjustments
Tr
oubleshooting
Data comm
unication
The
Afterheating
function can be used to reheat the
upper store zone through a heat source, if necessary.
It works independently from the hot water heating
and can be activated by the user.
When the function has been activated, the corre-
sponding relay and the afterheating sensor have to
be allocated.
Maximum boiler temperature
The maximum boiler temperature
Boiler max.
determines the highest temperature which can be
reached at full boiler capacity. That prevents the cal-
culation or adjustment of an afterheating temperature
that cannot be provided by the boiler.
For the afterheating, 2
afterheating modes are avail-
able:
Afterheating mode Absolute
As soon as the temperature at the allocated after-
heating sensor falls below the adjustable switch-on
temperature
T-AH on
, the afterheating is activated
and the allocated relay switches on. The store is then
heated up to an absolute store set temperature cal-
culated from the adjustable temperature difference
∆
T absolute
.
When the store set temperature is
reached, the afterheating is deactivated and the al-
located relay switches off.
Afterheating mode Relative
For this afterheating mode, a relative switch-on tem-
perature depending on the current set temperature
T-HW set
is used. As soon as the temperature at the
allocated afterheating sensor falls below the relative
switch-on temperature, the afterheating is activated
and the allocated relay is switched on.
The store is then heated up to a store set tempera-
ture which is by the adjustable temperature difference
∆
T relative
higher than the switch-on temperature
mentioned above. Afterwards, the afterheating is
deactivated and the allocated relay is switched off.
Adjustment channel
Description
Adjustment range / selection Factory setting
AH
Afterheating activation / Afterheating
mode selection
Off, Absolute, Relative
Off
Relay
Relay selection
R1, R3
system dependent
Sensor
Sensor selection
system dependent
S3
Boiler max.
Maximum afterheating temperature 20 … 95 °C
85°C during
boiler afterheat-
ing
T-AH on
Afterheating switch-on temperature 20 … 95 °C
45 °C
∆
T absolute
Afterheating mode Absolute switch-
off threshold
3 … 30 K
5 K
∆
T relative
Afterheating mode Relative switch-
off threshold
3 … 30 K
3 K
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Main menu / Afterheating
3.3.3 Afterheating
