89
Example:
This example uses the heating curve values from the screenshot.
Assuming:
the outside temperature is 7 °C, then the flow temperature will be regulated to
35 °C. If the outside temperature is 3.5 °C, then the flow temperature will be
regulated to 38.5 °C.
18. Room temperature
The heating circuits in this system can be used for several rooms; regulation in
the rooms is independent of this controller. This controller therefore does not
have any room temperature sensors.
Note
In order to make the regulation clearer, room temperatures are calculated even
though there are no room temperature sensors.
The heating curve temperatures correspond to the flow temperature of the heat-
ing circuit. The standard room temperature, the adjustment factor and the user-
adjustable set temperature are constants.
During commissioning the standard temperatures and the adjustment factor
need to be set by the contractor. The user-adjustable set room temperature for
day and night affects the flow temperature of the heating circuits as described
below:
Formula
■ (Set room temperature - standard room temperature) * heating curve adjust-
ment factor
Example:
■ Set room temperature = 24 °C, daytime standard room temperature = 20 °C
■ A factor of 2 gives an adjustment value of 8 kelvin
■ This figure of 8 kelvin is added to the flow temperature that is calculated from
the heating curve.
Note
Important information on adjusting the standard room temperature and
factor:
The shift of the heating curve based on the room temperature constants limits
the control range. Excessive correction results in the heating system running
constantly at minimum or maximum. In this scenario the outside temperature has
no effect on the regulation.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5848 246 GB
Service
