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A.O. Smith 30 User Manual

Page 109

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Instruction manual SGS

109

is

17.4.1

Solar system electrical diagram
legend

Solar heating system control components

Solar heating system controller terminal strip

AA

Controller

BB

Extra head pump for solar heating
system (ON/OFF)

CC

Solar heating system pump
(modulating)

DD

Temperature sensor (S1 - solar
collector)

EE

Temperature sensor (S2 - storage
tank)

FF

Combined Q/T sensor (incl.
temperature sensor S4 - solar
collector return)

GG

Controller (BUS-link)

HH

Temperature sensor (S3 - top
storage tank)

F2

Fuse

1
2

L

Power

3

N

4

-

n.a.

5

-

n.a.

6

-

n.a.

7

Extra head pump for solar heating

system (ON/OFF)

8

L1

9

N

10

Solar heating system pump

(modulating)

11

L2

12

N

13

M

14

-

n.a.

15

-

n.a.

16

-

n.a.

17

-

n.a.

18

-

n.a.

19

-

n.a.

20

-

n.a.

J3

1

n.a.

2

n.a.

3

n.a.

4

n.a.

J12

1

Power 5V

2

Solar collector return sensor (S4)

3

Earth

4

Flow signal

J13

1

n.a.

2

Solar collector sensor (S1)

3

n.a.

4

Solar collector sensor (S1)

J14

1

Top tank sensor (S3)

2

Tank sensor (S2)

3

Top tank sensor (S3)

4

Tank sensor (S2)

J15

1

n.a.

2

n.a.

3

n.a.

J16

1

BUS-link

2

J17

1

n.a.

2

n.a.