A.O. Smith SGS - 30 Electrical diagram SGS, Components Controller, Connections main controller

SGS

Electrical diagram SGS 28-60

Components Controller

AController

BIonisation rod

CGlow ignitor

DGas control

EBurner earth connection

FExtra ON-mode switch

GContinuous pump

HProgram controlled pump

J Extra error signal

K Isolating transformer

L Double-pole mains switch M On/Off switch control

N Display O Fan

P Temperature sensor

(T2 - bottom of tank) Q Dummy

R Temperature sensor

(T1 - top of tank) S Selection resistor

T Pressure switch

U Controller solarsystem (BUS-link)

F1 Fuse

F3 Fuse

Connections main controller

1	X5	BUS-link
2	X6
3	-	n.a.
4	-	n.a.
5	X3	External ON / OFF
6	X4
7
8	L5	Continuous pump
9	N
10	N
11	L4	Program controlled pump
12
13	X2
14	X1	Extra error signal
15
16	N	Isolating transformer
17	L2
		(primary side)
18
19	N	Isolating transformer
20	L3
		(secundary side)
21
22
23	L1	Power supply
24	N

Components solar controller

AAController

BBPump solar system (ON / OFF)

CCPumps solar system (modulating)

DDTemperature sensor (S1 - solar collector)

EETemperature sensor (S2 - tank)

FFQ/T-measuring (incl. temperature- sensor S4 - return solar collector)

GGController (BUS-link)

HHTemperature sensor (S3 - top tank)

F2 Fuse

Connections solar controller

1
2	L	Power supply
3	N
4	-	n.a.
5	-	n.a.
6	-	n.a.
7		Pump solar system
8	L1
		(ON / OFF)
9	N
10	N
11	L2	Pump solar system
12	-	(modulating)
13
14	-	n.a.
15	-	n.a.
16	-	n.a.
17	-	n.a.
18	-	n.a.
19	-	n.a.
20	-	n.a.
	1	n.a.
J3	2	n.a.
	3	n.a.
	4	n.a.
	1	Power supply 5V
	2	Sensor return
J12		solar collector (S4)
	3	Earth
	4	Flow signal
	1	n.a.
J13	2	Sensor solar collector (S1)
	3	n.a.
	4	Sensor solar collector (S1)
	1	Sensor top tank (S3)
J14	2	Sensor tank (S2)
	3	Sensor top tank (S3)
	4	Sensor tank (S2)
J15	1	n.a.
	2	n.a.
J16	1	BUS-link
	2
	1	n.a.
J17	2	n.a.
	3	n.a.