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Special functions
6.6.9. - Difference
6.6.9.1. - ∆ T difference
6.6.9.2. - DF source (sensor)
The relay is switched on when a specic temperature difference (∆ T) is reached.
Settings range: On, Off
Switch on - difference:
When this temperature difference is reached, the relay is switched on.
Settings range: 5-20° C / Default setting: 8° C
Switch off - difference:
When this temperature difference is reached, the relay is switched off.
Settings range: 2-19° C / Default setting: 4° C (the upper limit is the switch on - difference)
Heat source sensor for Difference function
This determines the sensor for the heat source.
Settings range: S1-S8, VFS1-2, Active storage/ Default setting: none
6.6.9.3. - Diff Tmin
Minimum temperature at source sensor to enable the difference relay
When the temperature at the source sensor is below this level, the difference function is disabled.
Settings range: 0 to 90°C / Default setting: 20°C
6.6.9.4. - DF Drain (sensor)
6.6.9.5. - DF Tmax
Drain sensor / Target sensor for difference function
This determines the sensor for the target storage.
Settings range: S1-S8, VFS1-2, Active storage/ Default setting: none
Maximum temperature at target sensor to enable difference function
If the temperature at the target sensor exceeds this value, difference function is disabled.
Settings range: 0 to 99°C / Default setting: 60°C
Relay functions
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