Siemens RVA47.320 - Plant Type 33: BMU DHW, Changeover Valve, System Pump

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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E
HVAC Products Application examples 15.07.2002
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.
4
1
2
3
B10
2379S33
B70
T
yp
e of unit BMU 1 BMU 2 BMU 3 BMU 4
RVA47.320
Dis
p
la
y
of
p
lant t
yp
e
33
Heatin
g
curve
(
line 17
)
---
(
inactiv
)
or 2.5...40
Pump function Q1 (line 95) 2 (primary pump for HC
o
nl
y)
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.
L
N
Q1 F1
N1
Q3
B3 B9B7 0
B70
M
L
N
23 79A3 3
MB
LPB
MD
A6 / BMU
PPS
DBB1 0
BM
H1
B10
BM
B9
BM
A6
BM
H1
The d.h.w. sensor (B3) is connected directly to BMU 1.
For a detailed legend, refer to page 158.
 Note
Hydraulic circuit
 Important
 Notes
Electrical connections
 Note
Legend