41
Cooling mode
In the cooling mode menu, different cooling func-
tions are available. they can be used for keeping the
solar system operational for a longer time during
strong solar irradiation.
For this purpose, the adjusted maximum store tem-
peratures can be exceeded. the store order for this
overloading can be adjusted. additionally, each indi-
vidual store can be excluded from this function.
two different variants are available for the cooling
mode: the system cooling and the collector cooling.
System cooling:
If the system cooling variant has been selected and
the switch-on temperature difference is exceeded,
store loading is continued even if the correspon-
ding maximum temperature is exceeded, but only
up to the emergency shutdown temperature. store
loading continues until all stores have reached the
emergency shutdown temperature or until the
switch-off temperature difference is reached.
Collector cooling
:
If the collector cooling variant has been selected,
store loading is continued or reactivated when the
collector maximum temperature is exceeded.
store loading continues until all stores have reached
the emergency shutdown temperature or until the
collector temperature falls below the collector maxi-
mum temperature by at least 5 K.
In 2-collector systems, separate adjustments can be
made for each collector field.
the control logic regards collector cooling operation
as solar loading. the adjusted values for delay, mini-
mum runtime, etc. remain valid.
In addition to the cooling mode, store cooling is
available.
Store cooling
:
When the store cooling function is activated, the
controller aims to cool down the store during the
night in order to prepare it for solar loading on the
following day.
When the store cooling function is activated, the so-
lar pump is switched on if the maximum store tem-
perature is exceeded and the collector temperature
falls below the store temperature. the solar pump
remains active until the store temperature falls
below the adjusted maximum store temperature.
the store order for the cooling is the same as in the
overheating through system- or collector cooling.
the holiday function works like the store cooling
function but aims to cool the store further down
during times without DHW consumption in order to
prepare it for solar loading on the following day. this
function can only be activated if the store cooling
function is activated.
the holiday function can either be activated manu-
ally when a phase with no DHW consumption be-
gins, or a time frame, during which the function is
to become active, can be set in advance. If
manual
is selected, an input can be allocated to the function.
When a switch is connected to the allocated input, it
will act as an on/off switch for the holiday function.
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