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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the heating engineer settings
18.10.2002
4.33 Solar return temperature sensor B64 for yield
measurement (ZuFu14)
•
Makes possible yield measurement of the solar circuit
To provide solar yield measurement, the differential of solar flow and solar return tem-
perature and the flow rate must be known.
On this operating line, the setting of return temperature sensor B64 is made.
Setting range
Unit
Factory setting
--- / 101...109
B64
---
The auxiliary function is activated as soon sensor B64 is assigned to a free terminal:
101...109 Sensor
B64
can be assigned to a free sensor terminal between B101
and B109.
---
No assignment made and the auxiliary function is not activated.
Based on the temperatures acquired by sensors B63 and B64 and the measured (or
set) flow rate, the controller calculates the current energy yield.
The settings for solar yield measurement are to be found on operating lines 338
through 344, the yield display on operating lines 65 and 66.
For a detailed description of solar yield measurement and the use of alternative sen-
sors, refer to the general description of operating line 338.
To ensure an acceptable accuracy level of yield measurement, flow rate measurement
and calibrated sensors must be located in the same circuit.
(Refer to operating line 159).
4.34 Solar heat exchanger diverting valve K¯8
(ZuFu15)
•
Additional inverted signal for the control of a 2-wire valve
The signal for the control of solar heat exchanger diverting valve K8 can be inverted
(K¯8) and assigned to a free relay terminal.
Setting range
Unit
Factory setting
--- / 101...110
K¯8
---
The auxiliary function will be activated as soon as diverting valve K¯8 is assigned a free
terminal:
101...110
The inverted signal for diverting valve
K¯8
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 K8.
As soon as this valve is deenergized, the valve returns to the initial position.
For a valve with 2-wire control to change back to the initial position, a second inverted
signal (K¯8) is required.
Benefit
Description
Setting
Assignment
Effect
Note
Application example
Benefit
Description
Setting
Assignment
Use
