Siemens RVA47.320 - Page 154

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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E
HVAC Products Application examples 15.07.2002
8.10 Plant types RVA47.320 - no. 36
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. Control of pump heating circuit by RVA47.320.
4
1
2
3
B10
2379 S36
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
36
Heatin
g
curve
(
line 17
)
2.5...40
Pum
p
function Q1
(
line 95
)
1
(
heatin
g
circuit
p
um
p)
Other LPB capable controllers on the consumer side 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 only a heat demand signal from the d.h.w. storage tank (heating circuits
do not currently call for heat), the boiler put into operation is only that 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
B9
B70
B70
M
L
N
2379A 33
MB
LPB
MD
A
6 / BMU
PPS
DB
B10
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