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RELA
Y FUNC
TIONS
DANGER
During the anti-Legionella function the storage tank is heated up over the set value “Tmax S(X)”, which can lead to scalding and
damage to the system.
6.4.8 Heat Transfer
This is used to transfer energy from one storage to another with a pump.
Settings range: S1-S8, VFS1-2, Active storage/ Default setting: none
6.4.8.1 ∆ T Heat Transfer
Temperature difference for heat transfer function.
When the temperature difference between HT Source and HT Drain reaches ΔT Heat Transfer On, the relay is switched on. As sson as the differ-
ence drops to ΔT Heat Transfer Off, the relay is switched off again.
On: Settings range: 5-20 K/ Default setting: 8 K
Off: Settings range: 2 K to ΔT Ein / Default setting: 4 K
6.4.8.2 Setpoint
Setpoint temperature of the target storage
When this temperature is detected in the target storage, heat transfer is switched off.
Settings range: 0°C to 90°C (32°F to 212°F) / Default setting: 60°C (140°F)
6.4.8.3 HT Tmin
Minimum temperature in source storage to enable the heat transfer
Settings range: 0°C to 90°C (32°F to 194°F) / Default setting: 30°C (86°F)
6.4.8.4 TH Source (Sensor)
This menu determines the sensor, that is placed in the source storage.
Settings range: S1-S8, VFS1-2, Active storage/ Default setting: none
6.4.8.5 HT Drain (Target Sensor)
This determines the sensor placed in the storage that is receiving energy from the source storage.
Settings range: S1-S8, VFS1-2, Active storage/ Default setting: none
