Temperature-Time Integral - Siemens RVA63.280 Basic Documentation

Description
Diagram
140/184
Siemens Building Technologies
Landis & Staefa Division
3.9.3

Temperature-time integral

The temperature-time integral generates the locking signal for restricting the heating
circuits.
During the generation of the locking signal, the following processes can take place:
Diagram Procedure
a to b Within a foreseeable period of time, the actual boiler temperature (TKx)
will lie below the value of Tkmin-SDK/2.
è è è è
b to c and Within a foreseeable period of time, the actual boiler return temperature
d to e (TKx) will lie within half the switching differential of the boiler return
temperature's minimum limitation.
è è è è
c to d and Within a foreseeable period of time, the actual boiler return temperature
e to f (TKx) will lie above TKw.
è è è è
TK
TKx
SDK/2
TKmin
y
x%
0%
a
TK boiler temperature
TKx Actual value of boiler temperature
Tkmin Minimum limitation of boiler temperature
SDK Boiler switching differential (factory setting = 8K)
t Time
Y Locking signal
Basic Dokumentation RVA63.280, RVA53.280
Locking signal will be built up
Locking signal will remain at a constant level
Locking signal will be decreased
b c d
t
t
e f
CE1P2374E
19.04.2001