Operating Instructions

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Siemens RXB (KNX) application library RXB Description of functions for FC-10, FC-11, FC-12, FC-13 CM110385en_08
Building Technologies Control sequences 2013-06-17
The heat output calculated by the controller is achieved as follows:
LTHW radiators with
motorized valve actuators
The valve is opened to the heat output value [%].
LTHW radiators with
thermal valve actuators
The minimum heat output is 25%:
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:
Controller output
Note
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