Siemens RVD240 - Controller-Internal Uncritical Locking Signals; Uncritical Locking Signals from the Data Bus

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Siemens Building Technologies Basic documentation RVD240 CE1P2384en
HVAC Products 21 Locking signals 27.05.2004
For detailed information, refer to chapter 21.
All heat converters that lie in the supply chain of the d.h.w. demanding priority are not
affected by the uncritical locking signal.
Whether the controller shall respond to uncritical locking signal from the data bus can
be selected on operating line 137 (response to uncritical locking signals from the data
bus). The setting does not affect the response to controller-internal locking signals.
Setting operating line 137 Response
0 Uncritical locking signals from the data bus will be ignored
1 Uncritical locking signals from the data bus will be adopted
21.3.2 Controller-internal uncritical locking signals
Controller-internal uncritical locking signals always throttle the heating circuits. With
plant type 4–x, the heat converter parallel to d.h.w. will be affected.
21.3.3 Uncritical locking signals from the data bus
Uncritical locking signals from the data bus throttle the heat converters and the heating
circuits.