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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the heating engineer settings
18.10.2002
Functions
4.135 Control sensors for the heat pump
•
Control sensor for the heat pump can be selected
The sensor(s) selected on this operating line is (are) used for controlling the heat pump
to the setpoint (operating line 400 and / or 402). The associated switching differentials
ON / OFF are to be set on operating lines 421 and 422.
Setting range
Unit
Factory setting
1...9 –
2
The control function takes into account the following sensor(s):
1
Flow temperature sensor B21
The heat pump is switched on and off as a function of the flow temperature.
2
Return temperature sensor B71
The heat pump is switched on and off as a function of the return temperature.
3
Common flow temperature sensor B10
The heat pump is switched on and off as a function of the common flow tem-
perature.
4
Mean value (B21 + B71) / 2
The heat pump is switched on and off as a function of the mean value of flow
and return temperature.
5
ON with flow temperature sensor B21
OFF with return temperature sensor B71
6
ON with flow temperature sensor B21
OFF with buffer storage tank temperature sensor (B42, B41, B4)*
7
ON with common flow temperature sensor B10
OFF with buffer storage tank temperature sensor (B42, B41, B4)*
8
ON with return temperature sensor B71
OFF with buffer storage tank temperature sensor (B42, B41, B4)*
9
ON with buffer storage tank temperature sensor B4
OFF with return temperature sensor B71
* The relevant buffer storage tank temperature sensor will automatically be selected
according to the following criteria:
1.
B42, if present (ZuFu11, operating line 156)
2.
B41, provided solar is not integrated into the buffer storage tank
3. B4
If the setpoint of return temperature sensor B71 is required (settings 2, 4, 5, 8 and 9),
the correct “Temperature differential of flow and return at –10 °C" must be entered (op-
erating line 423).
Benefit
Description
Setting
Effect
Important
