Vaillant ecoTEC plus 937 Service Manual download pdf (Page 36)

36 Installation and maintenance instructions ecoTEC plus 937 0020031552_06

BUS

— +

24V

7 8 9

230V

L N 3 4 5

X31

X12

Boiler electronics box

Storage tank charging sensor (NTC)

X 1/3 Violet

X 1/1 Black

Pump

X 1/7 Green

X 1/1 Black

X 1/8 red

Storage tank sensor (NTC)

X 1/4 orange

X 1/1 Black

Plug

connection

Aqua-Sensor

Shift load storage tank electronics

X 1/2 brown

X 1/1 Black

X 1/2 Brown

X 1/1 Black

X 1/6 Blue

X 1/1 Black

Inlet sensor SWT (NTC)

X 1/10 Black

X 1/11 Red

X 1/9 Grey

X40 X41

Fig. 5.21 Connection diagram shift load storage tank

5 Sequence of operations during installation

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 79 80

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Vaillant ecoTEC plus 937 Service Manual Page 36