Rotex Controller Series, Продуктовая документация

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EbV Product documentation THETA NORM/UNIT
8-37
Conditional priority:
The heating circuits are enabled when the temperature in the heat generator
exceeds the current DHW target value. The heating circuits will be enabled according
to the following criteria:
Enabling the heating circuits:
H-GEN actual temperature > DHW se DHW switching differential/2 + 10 K
Disabling the heating circuits:
H-GEN actual temperature < DHW se DHW switching differential/2 + 5 K
Note:
In this operating mode the loading temperature increase for the tank is to be selected
so that the heat generator does not switch off before the heating circuits are enabled.
A parallel shift of at least 10K should be set so that this function can operate correctly.
Weather responsive parallel mode:
Above the set outside frost protection limit DHW heating is carried out in priority
mode; in case of active frost protection there is a switchover to parallel mode.
Priority mode with intermediate heating
With this setting DHW loading is limited to a maximum of 20 minutes in order to
provide for a 10-minute long intermediate heating. The loading procedure is
continued at the end of the intermediate heating. DHW loading and intermediate
heating are carried out in an alternating order until DHW tank loading is finished.
Priority-separation circuit:
Tank loading is carried by means of a three-way changeover valve; the heating
circuit pump is also the DHW loading pump. At the end of the DHW loading and at
the expiry of the extended time the three-way valve is changed back to heating
mode.
The heating circuit pump is connected at output HC-P and the three-way valve to
output DHW in this case.
External operation (Request does not act on heating generator and HC)
In external operation hot-water loading is switched only according to the set
switching differentials. There is no heat request to the heat generator. There is no
accumulator priority mode to the heating circuits. The parameters Boiler parallel shift,
Tank Discharge Protection, Pump Extended Running Time and Boiler Start-up
Protection do not act on the DHW loading pump.
Discharge Protection: Tank Discharge Protection
With discharge protection activated and a DHW request present, the DHW loading
pump enabled only when the temperature in the heat generator rises by more than
5 K above the actual temperature in the hot water tank.
This measure prevents any rear tank discharge through the heat generator. The
DHW loading pump is disabled again as soon as the temperature difference between
the heat generator and the DHW tank has dropped to less than 2 K.
Operation:
Note on operation Key / parameter tree Parameter
Setting DHW
Operational mode
DOMESTIC HOT WATER PARAMETER 07