Buderus SRC plus Installations- Und Bedienungsanleitung Seite 46

7
ErP class
Condensation protection
Each individual control for the underfloor heating system has an air
humidity sensor. If this sensor measures a relative humidity of more than
approx. 70 %, the individual control of the underfloor heating system
stops the cooling in the room affected (closes the relevant underfloor
heating system valve).
To determine the flow temperature, the relative humidity and the
measured room temperatures of all individual controls with an active
cooling requirement are considered. The dew point is calculated from
the measured relative humidity and the room temperature. The room
(individual control) with the highest dew point is decisive for
determining the flow temperature. This is because the probability of
condensation is highest in this room compared to the other rooms.
A safety margin is added to the dew point. If this temperature is higher
than the minimum flow temperature, it is used as the set flow
temperature.
Example:
• Dew point temperature 16 °C
• Safety margin 5 K
• Minimum set flow temperature = 20 °C).
The sum of the dew point temperature and safety distance is 16 °C + 5 K
= 21 °C. This temperature is above the minimum set flow temperature
and is therefore the set flow temperature.
7 ErP class
The class of the temperature control is required to calculate the room heating energy efficiency of an integrated system and is for this reason
incorporated into the system data sheet.
Functions of the individual control
BC400 Control type = Individual control
Weather-compensated with influence of room temperature, modulating heat generator
BC400 Control type = Weather-compensated
Weather-compensated, modulating heat generator
1) Radiator or underfloor heating system
Table 5 Classification of the control system according to ErP (EU 811/2013; (EU) 2017/1369)
46
The safety distance and the minimum set flow temperature can be set via
BC400.
Fig. 22 Example BC400
Compared to systems with only one humidity sensor, dew point
monitoring takes place in all rooms with networked individual controls
and therefore offers significantly greater security against condensation.
BC400, outside temperature sensor, MX300 and
up to 2 individual
1)
controls
VI / 4.0
V / 3.0
SRC plus – 6721856015 (2024/03)
0010047326-001
ErP class / %
from 3 individual
1)
controls
VIII / 5.0
V / 3.0