Humidity Control (Rdg165Kn Only) - Siemens RDG100KN Basic Documentation

K N X
R
Room humidity
Note
Setpoint (P21, P22)
K N X
R
Setpoint high
Setpoint low
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Siemens
Building Technologies
3.5.2

Humidity control (RDG165KN only)

Humidity control limits the humidity in the room according to the selected setpoint
(minimum/maximum) by shifting the temperature setpoint, or by enabling outputs to
release the external equipment as needed, e.g. the dehumidifier or humidifier.
Humidity control is active in Comfort mode when P75 is set to 3 (factory setting).
The function can be disabled by setting P75 to 0.
Humidity function is disabled in Economy or Protection mode.
The humidity level in the room is acquired by the built-in sensor. The thermostat
can receive the relative humidity via the bus if a valid humidity value is available
and selected on KNX (S-Mode or LTE-Mode).
The priorities are set as follows:
1. S-Mode
·
By selecting parameter "Room relative humidity" in the ETS to Receive,
the thermostat can display the relative humidity measured by an external
sensor on the bus.
·
If the parameter is set to Transmit (factory setting), the thermostat can
display the humidity value measured by the built-in sensor and the value
is sent to the bus.
2. LTE-Mode
The thermostat displays the relative humidity value on the bus if the external
KNX sensor is in the same geographic zone apartment and room (A.R.1) as
the thermostat.
3. In other cases, the thermostat displays the humidity value measured by the
built-in sensor.
To display room humidity (%) on the thermostat, P07 needs to be set to 5 (factory
setting).
The maximum humidity setpoint (%) is selectable via P21 (setpoint humidity high)
and can be adjusted via parameters in Service level or via the bus.
Setting P21 to OFF disables maximum humidity control.
The minimum humidity setpoint (%) is selectable via P22 (setpoint humidity low)
and can be adjusted via parameters in Service level or via bus.
Setting P22 to OFF (default setting) disables minimum humidity control. The setting
range is limited by P21.
S-Mode objects for the humidity setpoint are available when the parameter
"Humidity setpoints" is set to as group object in ETS.
RDG100KN, RDG160KN, RDG165KN Basic Documentation CE1P3191en
2018-07-03