Siemens Desigo RXB Technical Manual page 340

LTHW radiators with
thermal valve actuators
Note
ETS3 Professional
ACS Service
HandyTool
Parameter for downdraft
compensation
Outdoor temp.0% valve position
Outdoor temp. max. valve
position
Max. valve position
104/166
Siemens
Building Technologies
• 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:
See Parameters in the last column of the table below
Basic
setting
0 °C
–10 °C
100 %
RXB (KNX) application library
Control sequences
Range Resolution
–30 ... 10 °C 0.5 K
–30 ... 10 °C 0.5 K
0 ... 100 % 1 %
FNC Description of functions for FC-10, FC-11, FC-12
HandyTool
parameter
*078
*079
*080
CM110385en_05
28 Feb 2009