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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the heating engineer settings
18.10.2002
4.156 Operating action of the return diversion
(ZuFu1)
Defines if auxiliary function “Return diversion” (ZuFu1) is used for raising or lowering
the return temperature.
Setting range
Unit
Factory setting
1...2 -
1
Entry:
1
Return diversion is used for
lowering
the
return temperature
2
Return diversion is used for
raising the
return temperature
For a description of the auxiliary function, refer to operating lines 140 and 141.
The temperature differentials required for activating the function can be set on operat-
ing lines 480 and 481.
4.157 Storage tank sensor for the return diversion
(ZuFu1)
Defines which of the buffer storage tank sensors shall use auxiliary function “Return di-
version“ (ZuFu1) for generating the temperature differentials (operating lines 480 and
481).
Setting range
Unit
Factory setting
1...3 -
2
The temperature differential acquired is that between return sensor B73 and one of the
following selected sensors:
1
Buffer storage tank sensor B4
2
Buffer storage tank sensor B41
3
Buffer storage tank sensor B42
To ensure proper functioning, the sensors must be correctly located.
Description
Setting
Effect
Notes
Description
Setting
Effect
Note
