Functions; Temperature And Iaq Control (Rdg405Kn Only); Temperature Control - Siemens RDG400KN Basic Documentation

General note:
Parameters

Temperature control

Display
K N X
R
Room temperature
/
Concurrent display of
°C and °F
K N X
R
Outside temperature
via bus
K N X
R
Time of day via bus
Siemens
Building Technologies
3.

Functions

3.1 Temperature and IAQ control (RDG405KN
only)
3.1.1 Temperature control
Setting of the control parameters (P01, etc., mentioned throughout the document)
is described in section 3.12.
The thermostat acquires the room temperature via built-in sensor, external room
temperature sensor (QAA32) or external return air temperature sensor (QAH11.1),
and maintains the setpoint by delivering actuator control commands to the heating
and/or cooling equipment. The following control outputs are available:
∂ VAV box/air damper:
Modulating PI/P control with DC 0...10 V/3-position/KNX LTE-Mode
∂ Heating/cooling coil, radiator, electric heater:
Modulating PI/P control with 3-position/PWM/DC 0...10 V/On/Off control
(2-position)
The switching differential or proportional band is 2 K for heating mode and 1 K for
cooling mode (adjustable via P30 and P31).
The integral action time for modulating PI control is
5 minutes for the RDG400KN and 45 minutes for the RDG405KN (adjustable via
P35).
The display shows the acquired room temperature or the Comfort setpoint, selecta-
ble via P06. The factory setting displays the current room temperature.
P04 is used to display the room temperature or setpoint in °F rather than °C as
needed.
The acquired room temperature (built-in or external sensor) is also available as
information on the bus.
∂ With automatic changeover or continuous heating/cooling, symbols
indicate that the system currently heats or cools (heating or cooling output
activated)
∂ With manual changeover (P01 = 2), symbols
currently operates in heating or cooling mode. Thus, the symbols are displayed
even when the thermostat operates in its neutral zone.
Symbols /
cooling output activated)
Concurrent display of the current temperature or setpoint in °C and °F (P07 = 1) is
possible on the thermostat.
The outside temperature can be displayed on the room thermostat by setting
P07 = 2. This temperature value has only informative character.
In LTE-Mode, the outside temperature can only be received on outside temperature
zone 31.
Time of day via bus can be displayed on the room thermostat by setting
P07 = 3 or 4. The display is either in 12- or 24-hour format.
The information can be received from a Synco controller with time master
RDG400KN,RGD405KN Basic documentation
indicate that the system currently heats or cools (heating or
/
/ indicate that the system
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