Technical Manual
Glass Room Temperature Controller Smart SCN-RTRGx.02
MDT technologies GmbH •
51766 Engelskirchen • Papiermühle 1
•
Germany
Phone: +49-2263-
880 • [email protected] • www.mdt.de
33
33
Dead zone
If the control mode is set to "Heating and Cooling", the following parameter is displayed:
ETS-Text
Dynamic range
[Default value]
Comment
Dead zone between Heating
and Cooling
1,0 K
–
10,0 K
[2,0 K]
Setting range for the dead zone (range in
which the controller activates neither the
heating nor the cooling process):
Table 24: Setting
–
Dead zone
The settings for the dead zone are
only possible if the controller type is set to “Heating and Cooling”.
As soon as this setting is made, the dead zone can be parameterised.
The dead zone is the area in which the controller does not activate either the heating or cooling
process. Consequently, the controller does not send any value to the control value in the dead zone
and therefore the control value remains switched-off. When setting the dead zone, please note that
a low value leads to frequent switching between heating and cooling, whereas a high value leads to
a large fluctuation of the actual room temperature.
If the controller is set to “Heating and Cooling”, the basic comfort value always forms the setpoint
for the heating process.
The setpoint for cooling is calculated by adding the base comfort value
and the dead zone
. So, if the base comfort value is set to 21°C and the dead zone to 3K, the
setpoint for the heating process is 21°C and the setpoint for the cooling process is 24°C.
The dependent setpoints for “Heating and Cooling”, i.e.
those for the “Standby” and “Night”
operating modes, can again be parameterised independently of each other in the controller mode
“Heating and Cooling”. The setpoints are then calculated as a function of the basic Comfort value,
the setpoint for the “Comfort” operating mode, for the heating and cooling process.
The setpoints for “Heat”
-
and “Frost protection” are independent of the settings for the dead zone
and the other setpoints.
The following diagram shows again the relationship between dead zone and the setpoints for the
individual operating modes:
The following settings were selected for this example:
Basic comfort value: 21°C.
Dead zone between heating and cooling: 3K
Increase and reduction Standby: 2K.
Increase and reduction Night: 4K
Figure 14: Example
–
Dead zone and corresponding setpoints
