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Siemens Building Technologies
Basic Documentation RVL471
CE1P2524E
HVAC Products
3 Fundamentals
23.10.2002
Notes on the plant diagrams with the different types of space heating and d.h.w. circuits
are given in the following sections:
•
Symbols
and
indicate where and how the space heating circuit is connected to
the d.h.w. circuit. where:
representing the flow
representing the return
•
The numbers beneath these symbols indicate the type of d.h.w. circuit with which the
heating circuit can be combined
3.2.2
Heating circuit type 1 – space heating with mixing
valve
A6/B5
B7
25
2
4
S
0
1
1, 2, 4
0, 5
Space heating with weather-compensated flow temperature control. 3-position control
acting on the mixing valve of the heating zone.
Outside temperature signal from own sensor or data bus. With or without room influ-
ence. Heating up and setback according to the heating program.
3.2.3
Heating circuit type 2 – space heating with boiler
A6/B5
252
4
S
0
2
1, 2
3
0, 5
Space heating with own boiler, with weather-compensated boiler temperature control.
2-position control acting on the burner.
Outside temperature signal from own sensor or data bus. With or without room influ-
ence. Heating up and setback according to the heating program.
