Siemens RVA47.320 - Plant Type 28: Cascade with DHW Heating

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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E
HVAC Products Application examples 15.07.2002
8.2 Plant types RVA47.320 - no. 28
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 with
charging pump through the RVA47.320.
4
1
2
3
B10
B70
2379S28
B3
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
28
Heatin
g
curve
(
line 17
)
---
(
inactive
)
Pum
p
function Q1
(
line 95
)
1
(
heatin
g
circuit
p
um
p
or no
This application requires the heat demand signal from a consumer (or d.h.w. heating)
to release heat generation:
• 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.
L
N
Q1 F1
N1
Q3
B3
B3
B9
B70
B70
M
L
N
2379A 28
MB
LPB
MD
A
6 / BMU
PPS
DB
B10
BM
BM
H1
B10
BM
B9
BM
A6
BM
H1
For a detailed legend, refer to page 158.
 Note
Hydraulic circuit
 Important
Electrical connections
Legend