9.6 Requesting/processing an external demand
Requesting an external demand
The flow temperature set points can be passed on over the LON network in complex heating sys-
tems. The external flow set point is compared with the controller’s own flow set point. The higher
of the two flow set points is passed on.
Functions
WE
Configuration
External demand
OFF
Co5 -> Fb13 = ON
LON active
OFF
Co7 -> Fb00 = ON
Master controller
OFF
Co7 -> Fb01 = OFF
Note!
In systems Anl 6 and 9, the setting Co5 -> Fb00 = OFF must be configured for passing on the flow
temperature set point. In all other systems, the setting Co5 -> Fb00 = ON must be configured.
Processing an external demand
The master controller receives the demand of connected controllers over the LON network and
makes the required energy available for all the control circuits. The secondary flow sensor in-
stalled directly downstream of the heat exchanger serves as the sensor for the primary valve.
The
Boost parameter improves the control performance of the connected heating circuit valves
and compensates for any loss in capacity.
If an internal heating circuit has the highest set point, the primary valve regulates the tempera-
ture at the flow collector to the set point of the heating circuit plus
Boost.
The set point in the heating circuit is regulated by the mixing valve of the heating circuit. In InF5
level, the set point of the primary valve appears on the display in this case.
Note!
In systems Anl 6 and 9, the external demand is only sent and not processed.
Functions
WE
Configuration
Flow sensor secondary VFsek
ON
Co5 -> Fb00 = ON
External demand
OFF
0 °C
Co5 -> Fb13 = ON
Boost / 0 to 30 °C
LON active
OFF
Co7 -> Fb00 = ON
Controller as master controller
OFF
Co7 -> Fb01 = ON
EB 5179 EN
85
Communication
