A.O. Smith SGE service manual Connecting the mains power, Connecting pump station modulating pump

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3.12.1Preparation

Undo the screws of the cap over the terminal block of the collector. This has the following terminals:

	Power				n.a.		Pump ON/OFF			Modulating pump							n.a.
		L	N	-	-	-		L1	N		L2	N	M	-	-	-	-	-	-	-
1		2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20

n.a.	n.a.		n.a.	n.a.	Power 5 V	Sensor S4			Flow signal	n.a.	Sensor S1		n.a.	Semsor S1	n.a.	Sensor S2		n.a.	Sensor S2
1	2		3	4	1	2		3	4	1	2		3	4	1	2		3	4
		J3					J12					J13					J14

3.12.2Connecting the mains power

Note

Just as with the appliance controller, the solar heating system controller must have a permanent electrical connection to the mains power supply. There must be a double-pole isolator installed in the permanent connection. This is the same double-pole isolator as installed between the mains power supply and the appliance itself. Whenever this isolator is operated, both controllers can be switched on or off.

1.Connect earth, live and neutral to terminals 1 through 3

2.Fit the cables in the strain relief.

3.Connect the power cable to the isolator.

4.Continue (3.12.3 "Connecting pump station - modulating pump").

3.12.3Connecting pump station - modulating pump

The pump station contains a modulating pump (4-wire connection). You must connect this pump to the controller of the solar heating system.

1.Connect earth, live and neutral to terminals 10 through 12.

2.Connect the fourth lead to terminal 13

3.Fit the cables in the strain relief.

4.Continue (3.12.4 "Connecting solar collector").

3.12.4Connecting solar collector

Note

This sensor must be mounted in the solar collector; refer to the solar collector installation manual.

Connect the sensor to the appliance as follows:

1.Connect the sensor to terminal 2 and 4 of J13.

2.Fit the cables in the strain relief.

3.Continue (3.12.5 "Connecting tank sensor").

Instruction manual SGE 39