Proper wiring of this unit is important to allow it to perform properly. The unit is wired between your power source and your pump control box.

The wire from your power source will have 2 wires that are hot with electricity. These will be referred to as L-1 and L-2.
L-1 will connect to the BW terminal #3
L-2 will connect to the BW terminal #4
From the BW #3, install a jumper wire to BW #5
From the BW #4, go into the pump control box to L-2 input
From the BW #6, go into the pump control box to L-1 input

Now it is time to set up your stainless steel electrodes for in the cistern.
There are 3 electrodes used in the proper installation. It is recommended that you leave the wire above each electrode hanging free in the cistern, at least 6" to 12" to prevent deposits from forming on the electrode that could cause false readings to the sensor control. It is also recommended that you place a bit of silicone gel on the top of the electrode cover where the wire goes in, to prevent water from getting into the top of the cap and being held there when the water drains from the bottom of the electrode. This will prevent false readings caused by water in the cap.

BW sensor #8 goes to your low level electrode. When the water level in the cistern drops to this level, the control signals the pump to turn on.

BW sensor #10 goes to a liquid ground. This should be hung in the cistern somewhere below the lower level pump turn on electrode. NOTE connecting this terminal to a ground stake will not provide a proper ground, and may make the control malfunction. Ground must be to liquid.

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