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Special functions
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6.10. - Difference
6.10.1. -
∆
T difference
6.10.2. - DF source (sensor)
The relay is switched on when a speci
fi
c 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 K / Default setting: 8 K
Switch off - difference:
When this temperature difference is reached, the relay is switched off.
Settings range: 2-19 K / Default setting: 4 K (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
6.10.3. - 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
6.10.4. - DF Drain (sensor)
6.10.5. - 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
