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Special functions
7.3.17. - Return
fl
ow increase
This function is used to raise the temperature of e.g. the return
fl
ow by making it pass through the storage.
Settings range: On, Off
7.3.17.1. - Return
fl
ow increase
Settings range: On, Off
7.3.17.2. - RF Tmin
Minimum temperature at storage sensor to enable the return
fl
ow increase. When this temperature is exceed-
ed at the storage sensor and suf
fi
cient
∆
T is present, the relay is switched on.
Settings range: 0-80°C / Default setting: 20°C
7.3.17.3. - RF Tmax
Maximum temperature at the return
fl
ow sensor. If this temperature is exceeded, the relay is switched off.
Settings range: 0-85°C / Default setting: 85°C
7.3.17.4. -
∆
T return
fl
ow
Switch-on temperature difference:
When this difference is exceeded between return
fl
ow sensor and storage sensor, the relay is switched on.
Settings range: 5-20 K / Default setting: 8 K
Switch-off temperature difference:
When this difference is exceeded between return
fl
ow sensor and storage sensor, the relay is switched off.
Settings range: 2-19 K (limited by
∆
T Storage RF On) / Default setting: 4 K
7.3.17.5. - Return
fl
ow (sensor)
Determines the sensor for return
fl
ow increase.
Settings range: S1-S8, VFS1-2, active Storage / Default setting: none
7.3.17.6. - Storage (sensor)
Determines the storage sensor
Settings range: S1-S8, VFS1-2, active Storage / Default setting: none
7.3.18. - Domestic hot water valve
This function is used for a time and temperature control of a domestic hot water valve
Settings range: On, Off
