Siemens RVA47.320 User Manual page 151

Note
Hydraulic circuit
Type of unit
Display of plant type
Heating curve (line 17)
Pump function Q1 (line 95)
Important
Notes
Electrical connections
Note
Legend
Siemens Building Technologies
HVAC Products
8.7 Plant types RVA47.320 - no. 33
The plant type no. is identical with the number displayed on line 53.
Control of a single BMU or cascade control of up to four BMUs. D.h.w. heating by one
BMU, with changeover valve. System pump for heating circuits connected to the
RVA47.320.
1
BMU 1
Heat generation is released by the heat demand signal from a consumer:
•
LPB capable controllers signal the RVA47.320 their current heat demand directly
via LPB.
• Controllers not suited for use with the LPB can deliver their heat demand signal via
input H1.
When there is no heat demand signal from the consumers (no LPB capable controllers
connected and no possibility to use input H1), the controller itself can generate a
weather-compensated flow temperature (adjustment of heating curve with a valid
value).
A heat demand signal from the d.h.w. storage tank releases only that boiler to which
the storage tank is hydraulically connected. The other boilers of the cascade
will not be released.
H1 B70
M B M B
B70 B3
H1
Q3 Q1 F1
N
L
The d.h.w. sensor (B3) is connected directly to BMU 1.
For a detailed legend, refer to page 158.
Basic Documentation RVA47.320
Application examples
2
BMU 2 BMU 3
B10 B9 A6 / BMU
M B M B PPS
M B10 B9 MD A6
N1
L
4
3
B70
BMU 4 RVA47.320
33
--- (inactiv) or 2.5...40
2 (primary pump for HC
only)
LPB
MB DB
N
B10
151/166
CE1P2379E
15.07.2002