A.O. Smith 30 User Manual
Page 109

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.
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