Valve Exercising Feature; Override Radiator Valve Actuators - Siemens Desigo RXB Technical Manual

ACS Service
HandyTool See the parameters in the last column of the following table.
Short name
Heat surf bus valve
K N X
CO
R
Note
84/140
Siemens
Building Technologies
Select Sequences .
Range
0 = Disabled / Off,
1 = Enabled / On
8.1.3

Valve exercising feature

To prevent valves from seizing after long periods of inactivity (e.g. cooling valve in
winter), the valves are operated from time to time. The valve actuators are operated in
such a way as to waste as little heating or cooling energy as possible.
The valve exercising function is triggered if the valve has been closed for ca. 91 hours
without interruption.
8.1.4

Override radiator valve actuators

For test purposes, the valve actuators can be overridden via the following
communication object:
Heating surface valve override (input communication object)
Flags Type
R W C T U
0 1 1 0 0 8.010
DPT_Percent_V16
To override the radiator valve actuator, the test mode must be activated via the
communication object Application mode (see page 105).
RXB (KNX) Applications library
Control sequences
Basic setting
Disabled (0)
Receive timeout
No
CLC and RAD description of functions for CC-02 CM110384en_03
HandyTool
*086
Value
0...100% 0 = 0%
+100 = +100%
+32767 = invalid
28 Feb 2009