18/94
Siemens Building Technologies
Basic Documentation RVD110, RVD130
CE1P2381E
HVAC Products
3 Fundamentals
27.05.2004
3.2.7
Plant type no. 6b
B1
Y1
Y7
B7
Q1
A6
B9
B71
Q7
23
81
S
0
9
N1
M
Heat exchanger for the heating circuit, d.h.w. heating via the district heat primary cir-
cuit, control of the d.h.w. temperature via an electrothermal actuator. Circulating pump
optional. For information, refer to section 14.5 ”Plant type no. 6b”.
3.2.8
Plant type no. 7
Y1
B7
B1
Q1
A6
B9
B3
Q3
Y5
B71
23
81
S
0
7
N1
B71
F1
M
M
Q8
2 heat exchangers connected in series, 1 for the space heating circuit and 1 for d.h.w.
heating; instantaneous d.h.w. heating via storage tank connected to the second heat
exchanger which uses a mixing circuit for d.h.w. control. Temperature sensor B71 can
be used as follows:
•
As a d.h.w. temperature sensor,
or
•
For maximum limitation of the temperature differential; in that case, the d.h.w. tem-
perature must be acquired with thermostat F1
3.2.9
Plant type no. 8
A6
B9
B71
Q1
Q7
Q3
Y1
B7
B1
Y5
B3
23
81
S0
8
N1
M
M
D.h.w. heating with storage tank connected to the heat exchanger; heating circuit with
mixing circuit in the heating zone flow; d.h.w. charging via charging pump.