is

17.4.1Solar system electrical diagram legend

Solar heating system control components

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 - tank)

 

 

FF

Combined Q/T sensor (incl.

 

temperature sensor S4 - solar

 

collector return)

 

 

GG

Controller (BUS-link)

 

 

 

 

F2

Fuse

 

 

Terminal block for solar heating system controller

1

 

 

2

L1

Power

3

N

 

 

 

 

4

-

n.a.

 

 

 

5

-

n.a.

 

 

 

6

-

n.a.

7

8L1 Solar heating system pump (ON/OFF)

9N

10

11

L2

Solar heating system pump

(modulating)

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

n.a.

 

2

Tank sensor (S2)

 

3

n.a.

 

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.

Instruction manual SGE

105

Page 105
Image 105
A.O. Smith SGE service manual Solar system electrical diagram legend