Processing of external demand using a 0 to 10 V signal
Regardless of the operating mode set for control circuit RK1– except manual mode –, at least
the flow temperature corresponding with the 0 to 10 V signal is used.
Functions
WE
Configuration
Processing of external demand in RK1
0
CO1 -> F15 - 1
Processing of external demand, 0 to 10 V
0
CO1 -> F16 - 1
Processing of external demand, binary
0
CO1 -> F17 - 0
Receive external demand
0
CO7 -> F15 - 0
Parameter
WE
Parameter level / Range of values
Set point boost of primary exchanger control
5 °C
PA1 / 0 to 50 °C
7.11 Flow rate/capacity limitation in RK1
Flow rate/capacity limitation can be implemented based on a pulse or standardized signal
of 0/4 to 20 mA provided by the heat meter. This only applies in plants without solar system
and without processing of an external demand using a 0 to 10 V signal. Particularly when a
standardized signal is applied, a heat meter (flow meter) with high measuring accuracy is
required.
Make sure that the controller is supplied with updated measured values in intervals of max.
5 seconds. In both cases (pulse or standardized signal), there are three different operating
situations:
4
A system with simultaneous room heating and DHW heating requires maximum energy.
4
A system with a fully charged storage tank which performs only room heating requires
less energy.
4
A system which suspends room heating during DHW heating requires less energy.
As a result, three different maximum limit values can be specified:
4
Max. limit value to determine the absolute upper limit
4
Max. limit value for heating for exclusive operation of the room heating
4
Max. limit value for DHW for exclusive operation of the DHW heating
In all systems without DHW heating or without heating circuit, only the
Max. limit value for
the flow rate or capacity can be set. In systems Anl 10.x and 11.x, the heating circuit
RK1/Y1 is turned down in case the limitation applies.
EB 5576 EN
77
System-wide functions
