Siemens AVS75.39 Series User Manual page 107

Monitoring the
temperature differential
Siemens
Building Technologies
Line no. Operating line
3590 Temp differential min
This function prevents excessive cascade return
temperatures and improves the cascade's switch-off
behavior.
If the temperature differential between flow and return
sensor (B10, B70) becomes smaller than the set minimum
temperature differential (3550), one of the heat sources is
switched off as early as possible, independent of the
selected lead strategy.
When the temperature differential returns to the normal level, the selected lead
strategy is resumed.
Switching off due to the minimum temperature differential does not apply to the last
generator in the cascade.
User manual RVS43.345
The settings in detail
B10
T
T
B70
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CE1U2354en_021
2013-09-02