Siemens Synco 200 - Page 140

This diagram illustrates the above statements:
Function diagram
0 %
5 %
2 K
SET-ON
TFrst
On
Frost alarm
SET-ON Frost hazard limit value
Legend
TFrst Frost temperature
Xp P-band
The frost protection function also remains active when the plant is off.
Note
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Siemens Universal Controllers RLU2… CE1P3101en
Building Technologies Frost protection (FROST) 29.08.2008