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Benefit
Description
Setting
Assignment
Use
Note
Application example
Siemens Building Technologies
HVAC Products
4.39 D.h.w. diverting valve Q¯3 (ZuFu26)
• Additional inverted signal for the control of a 2-wire valve
The signal for the control of d.h.w. diverting valve Q3 can be inverted (Q¯3) and as-
signed to a free relay terminal.
Setting range
--- / 101...110
The auxiliary function will be activated as soon as diverting valve Q¯3 is assigned a
free terminal:
101...110
The inverted signal for diverting valve Q¯3 can be assigned to a free
relay terminal between Q101 and Q110.
---
No assignment made and the auxiliary function is not activated.
For a valve with one-wire control, the only signal required is signal Q3.
As soon as the signal is no longer present, the valve will change over to its initial
position
For a valve with 2-wire control to change over to the initial position, a second inverted
signal (Q¯3) is required.
If only the inverted signal is required (for a one-wire valve with inverted control logic),
the inverted signal Q¯3 can be assigned to terminal Q3. In that case, Q3 will be re-
placed by Q¯3.
The diagram shows the inverted d.h.w. diverting valve Q¯3 as follows:
Example:
ZuFu 26
1
0
0
1
Q3
Q 3
Basic Documentation RVP540 / RVP550
Description of the heating engineer settings
Unit
Factory setting
Q¯3
---
113/348
CE1P2488en
18.10.2002
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