9
Water Level Sensor Installation
Float Sensor Installation
1. Determine a suitable position in the tank roof within reach of the man-hole, to
drill a 16mm hole for switch cable penetration. (Note: Hole saw available from Onga
dealer). Install the supplied cable gland, with the Locknut positioned inside the tank.
2. Surface Tank Installations: Drape the level sensor up against the side of the
tank, lifting the cable until the float is 70mm above the suction. At this point
mark the position of the cable that is level with the roof of the tank using the
marking tape (supplied).
4. Once in position, route the cable to the Onga WaterSwitch and plug the
connector to the matching receptor on the underside of the panel. Using the
cable ties, fix the cable to the pipework near the Onga WaterSwitch to avoid
the cable accidently being pulled free.
Min 100mm
Household
Mains
70mm
above suction
Note: Do not
adjust factory
setting.
Cable Tie
In-Ground installations: Lower the float into the tank. Position the fl oat 70mm above the
suction fitting or pump inlet. Use the marking tape (supplied) on the cable to indicate top of
tank position.
3. Feed the float switch connector plug, on the end of the float switch cable, through
the cable gland from the inside of the tank. Pull the cable through the gland
until the tape marker appears and is level with the top of the tank. Tighten the
gland’s external ‘dome nut’ to fix the cable position.
