BA_OTE 3+4_Endkunde_EN_V03_20170726.docx
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5.9
Cooling curve
For weather dependent controls, the current set flow temperature is deduced by means
of the current outside temperature. The cooling curve is adjusted using 3 parameters.
Parameter
Description
03-043 Cooling setpoint temper-
ature
The desired flow temperature at 20°C outside tem-
perature is set here.
03-047 Design outside tempera-
ture cooling curve
The standardised outside temperature in the cli-
mate region is set here.
03-048 Design supply tempera-
ture cooling curve
The desired flow temperature at standard outside
temperature is set here.
Fig. 10: Cooling curve with setting parameters
Dew point limit:
In the "cooling" mode, the minimum flow temperature is limited. The limit (dew point) is
calculated by the control using the following values:
•
Current room temperature:
•
Current relative humidity in the room
If no room temperature can be measured, the current outside temperature is used. If no
relative humidity can be measured, the dew point limit is calculated using a substitute
value of 60% rel. (Room temperature and humidity can be measured by the room control
units or by the room terminal with touch display).
Incorrect cooling curve settings can cause damage to the system (condense wa-
ter build up). OCHSNER accepts no liability for this! Change the cooling curve
settings only after consulting your contractual partner!
Flow-set-
temperature [°C]
TA [°C]
03-047 Standard
outside temperature cooling
20°C
Cooling
03-048 Design supply tempera-
ture cooling curve
03-043 Cooling set-
point temperature
Dew point limit
