Sensor Installation

Installation process

PVC piping

The sensor requires a 50mm Class 9 or 12 / 2in Schedule 40 PVC pipe to be installed as a balance line from the project’s wall to the pump and filter area.

NOTE: Always use 50mm / 2in pipe for the sensor housing to enable adequate flow around the sensor.

This pipe must be placed at least 300mm / 1ft below water level and can be dressed with a push-in eyeball to match the project’s other wall fittings.
The pipe is usually run along the suction and return trench, then elbowed up within the equipment area.
The balance line must be level to avoid air locks, which will affect water movement and performance.

End cap

A 50mm / 2in cap is provided to cover the sensor pipe housing and protect the sensor from dust, debris, pests and foreign materials.

WARNING: DO NOT GLUE THE END CAP TO THE SENSOR HOUSING PIPE.

Cable and plug

Insert the green plug into the bottom of the control box according to the picture below.

The Water Witch will not work if the sensor plug is attached incorrectly. You will notice that attempting to insert the plug backwards requires significantly more force.

NOTE: If the plug is inserted incorrectly, the fitting will be tight and may not eject easily. Be careful when pulling on the plug and cable to prevent damage.

Always hold the plug – not the cable – when removing the lead from the control box.

Never cut excess cable. Roll and bind together with the Velcro straps provided.
Do not expose the cable to water.
If the sensor is located away from the equipment area, always run the lead through adequately sized conduit with a diameter sufficient to allow future replacement of the sensor.
Avoid running cable through high traffic areas.

NOTE: If you un-screw the plug from the cable at any point, ensure the inner wires are reattached left-to-right YELLOW, GREEN/BLACK, then RED.

Installation type

Choose from one of the following options for specific installation instructions for each configuration.

Standard
Infinity / Negative edge
Balance tank
Pump out mode

Standard installation

Infinity / Negative edge installation

There are two crucial design factors to consider in relation to the required water level within an infinity edge trough:

A minimum water depth must be maintained within the trough

To ensure enough water is available to fill the pool and generate an overflow into the trough before the trough runs dry. Failure to do so will most likely result in severe pump, equipment and site damage.

The water level in the trough may increase dramatically

For example, during a significant rainfall event or heavy bather load. The trough capacity above the minimum water level must sufficiently allow for this increase.

Balance tank installation

The Water Witch is the most effective auto leveller for balance tank installations.

Maintaining a minimum water level in the balance tank will ensure the pump and pool equipment is protected whilst also allowing for the high water level fluctuations caused by bather activity and excess rainwater.