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Parallel relay
Solar / opt. functions / Add new function / Parallel relay
Adjustment
channel
Description
Adjustment range /
selection
Factory setting
Relay
Parallel relay
system dependent
system dependent
Store
Store sensor selection
system dependent
system dependent
Funct.
Activation / Deactivation
Activated, Deactivated
Deactivated
With this function, e. g. a valve can be controlled in parallel to a solar pump via a
separate relay.
Switch-on condition for the solar parallel relay function is that one or more of the
selected stores is being loaded. If at least one of the selected stores is being loaded,
the parallel relay is energised.
The parallel relay function operates regardless whether the store is subjected to
regular solar loading or to a loading caused by an optional function (such as the
collector cooling).
Note:
If a relay is in the manual mode, the selected parallel relay will not be
energised.
Cooling mode
In the Cooling mode menu, different cooling functions 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 temperatures can be exceeded. The
store order for this overloading can be adjusted. Additionally, each individual store
can be excluded from this function.
2 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 dif-
ference is exceeded, store loading is continued even if the corresponding 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 maximum
temperature by at least 5 K.
In 2-collector systems, separate adjustments can be made for each collector fi eld.
The control logic regards collector cooling operation as solar loading. The adjusted
values for delay, minimum runtime, etc. remain valid.
Store cooling option:
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 solar pump is switched on if
the maximum store temperature is exceeded and the collector temperature falls
below the store temperature. The solar pump remains active until the store tem-
perature 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.
Summary of Contents for BW/H Komfort HE
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