104/166
Siemens
RXB (KNX) application library
FNC Description of functions for FC-10, FC-11, FC-12
CM110385en_05
Building Technologies
Control sequences
28 Feb 2009
LTHW radiators with
thermal
valve actuators
•
The minimum heat output is 25%
(LED08: 10%)
:
400 seconds "OPEN" (1s On, 1 s Off) 1200 s "CLOSE" (1s On, 19 s Off)
•
Heat output 50%:
400 seconds "OPEN" (1s On, 1 s Off) 400 s "CLOSE" (1s On, 19 s Off)
•
Heat output 80%:
1600 seconds "OPEN" (1s On, 1 s Off) 400 s "CLOSE" (1s On, 19 s Off)
The long cycle time ensures that the valves are fully opened and closed.
In a network containing several room controllers, the opening of the Siemens thermic
actuators is staggered to prevent the heating load from fluctuating.
In fan coils with parallel operation of a thermal radiator valve actuator and a thermal
heating/cooling valve actuator, the valve actuators are driven alternately by the
controller.
Select
Sequences, Other setpoints:
Select
Sequences
,
Other setpoints:
HandyTool
See Parameters in the last column of the table below
Parameter for downdraft
compensation
Basic
setting
Range
Resolution
HandyTool
parameter
Outdoor temp.0% valve position
0 °C
–30 … 10 °C
0.5 K
*078
Outdoor temp. max. valve
position
–10 °C
–30 … 10 °C
0.5 K
*079
Max. valve position
100 %
0 ... 100 %
1 %
*080
Note
ETS3
Professional
ACS
Service