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5.4.10 Configuration diagram 1-BD - solar water heating with staged charging system and external
heat exchanger
L
N R1 N1 R2 N2 R3 R3 R4 R4 R5 R5
230V
R1
AC
WMZ
S8
7747006072-29.1 SD
Fig. 22
R1
Pump SP, solar circulation system
R2
Pump PD, heat exchanger
R3
Pump PD, charge transfer
R5
Valve DWUD, anti-icing system (option)
S1
Temperature sensor (T1), collector FSK
S2
Solar cylinder bottom temperature sensor (T2)
S3
Solar cylinder top temperature sensor
S4
Cylinder B bottom temperature sensor (TB)
S6
Temperature sensor (TD), external heat exchanger
S7
Flow heat meter WMZ temperature sensor (option)
S8
Return heat meter WMZ temperature sensor (option)
WMZ Heat meter (option)
L3 N3 L4 N4 L5 N5
R2
R3
S1
R1
S6
S7
R5
6 720 644 593 (2010/04)
ELECTRICAL CONNECTIONS (FOR ENGINEERS ONLY)
S1 S2 S3 S4 S5 S6 S7 S8 I9
R5
S1 S2 S3 S4
S3
S2
R2
S6 S7 S8 WMZ
R3
S4
31
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