Additional Functions - Siemens RDG100KN Basic Documentation

Function overview
Heating/cooling changeover via bus
Automatic heating/cooling changeover via changeover sensor
Changeover switch
Manual heating/cooling changeover
External/return air temperature sensor
Purge function
Avoid damage from moisture
Avoid cold air in heating mode
Minimum output On/Off time
Floor heating/cooling
Floor temperature limitation function
Dewpoint monitoring
Fault state
Button lock
Supply air temperature limitation
Qx relay switching function
Swap outputs for 2-pipe and 2-stage applications
Humidity control
Master/slave KNX S-Mode
Flow limitation in heating
Heating/cooling
changeover via bus
K N X
R
Heating/cooling
changeover
Automatic
heating/cooling
changeover via
changeover sensor
32 / 132
Siemens
Building Technologies
3.5

Additional functions

The heating/cooling changeover information can be received via bus. This is only
possible if the control sequence is set to automatic heating/cooling changeover
(P01 = 3) and no local input (X1, X2, D1) is assigned with this function.
In the absence of the required information (e.g. due to problems with data
communication, power failure, etc.), the thermostat operates in the last valid room
operating mode (heating or cooling).
If a cable temperature sensor (QAH11.1 + ARG86.3) is connected to X1/X2, and
P38/P40 is set to 2, the water temperature acquired by the changeover sensor is
used to change over from heating to cooling mode, or vice versa.
· When the water temperature is above 28 °C (adjustable via P37), the
thermostat changes over to heating mode. It stays in heating mode until the
temperature falls below 16 °C (adjustable via P36)
· When the water temperature is below 16 °C (P36), the thermostat changes over
to cooling mode. It stays in cooling mode until the temperature rises above 28
°C (P37)
· If the water temperature is between the 2 changeover points immediately after
power-up (inside the hysteresis), the thermostat starts in the previous mode
RDG100KN, RDG160KN, RDG165KN Basic Documentation
RDG100KN RDG160KN RDG165KN
ü
ü
X
X
X X
X X
X
ü
X
ü
X
X
CE1P3191en
2018-07-03