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Siemens Building Technologies Basic Documentation RVA63.242, RVA53.242 CE1P2373E
Landis & Staefa Division Description of heating engineer settings 26.03.2001
4.30.10 Boiler bypass pump
The pump connected serves as a boiler bypass pump for maintaining the boiler return
temperature.
Control of the bypass pump can be selected, either parallel with the burner or according
to the measured return temperature. Also refer to "control of the bypass pump" in
Index.
4.30.11 Alarm signal
If an error occurs, either locally or in the system, leading to a display on error line 50,
the alarm relay will signal it.
The contact is closed with a delay of 2 minutes.
When the error is corrected, that is, which means that the error message is no longer
present, the contact will open with no delay.
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