Functions
WE
Configuration
Control mode DHW
1
5 °C
120 sec
120 sec
CO2 -> F11 - 0
Hysteresis / 2 to 10 °C
Min. ON time / 0 to 600 sec
Min. OFF time / 0 to 600 sec
7.8
Requesting/processing external demand
Requesting external demand
In more complex heating systems, the flow temperature set points can be forwarded from
controller to controller. The external flow set point of the previous controller is read over ana-
log input UE and compared to the controller's own flow set point. The higher of the two flow
set points is forwarded to the next controller over output UA. On forwarding to other sys-
tems, it may be necessary to change the transmission range of the 0-10 V signal. Any
changes in transmission range only apply to the analog output UA. The assignment 0 to
10 V = 0 to 120 °C still applies to the analog input UE.
In systems with storage tank thermostat, the
Requested value
parameter can be changed as
required. It determines the minimum value of the output signal to UA when the storage tank
charging is active.
In systems with storage tank sensors, the
Requested value
is calculated from the current set
point of the storage tank
(DHW temperature set point, Sustained DHW temperature or Disin-
fection temperature)
plus
Charging temperature boost
plus
Boost
(alternative function block
parameter to
Requested value
).
Functions
WE
Configuration
External demand, request
0
0 °C
120 °C
70 °C
0
CO-SYS -> F10 - 1
Transmission lower range value / 0 to 130 °C
Transmission upper range value / 0 to 130 °C
Requested value /20 to 90 °C (Anl 4, 5 and 6
only)
Boost / 0 to 30 °C (alternative)
External demand, processing
0
CO-SYS -> F11 - 0
Forward outdoor temperature, 0 to 10 V
0
CO-SYS -> F12 - 0
Furthermore, the binary output BA in the systemes Anl 1, 4 and 6 can configure for floating
boiler demand:
Function
WE
Configuration
Fault alarm output BA
1
CO-SYS -> F13 - 0
64
EB 5433 EN
System-wide functions
