Operating instructions

4-3
To remove optical sensor:
1) Disconnect power to the unit.
2) Remove cover.
3) Remove controller.
4) From the controller side, pinch the legs of the sensor holder in the top plate.
5) Pull the holder away from the mounting surface.
6) Remove wires.
To install optical sensor:
1) Attach wires. Wires should point away from camshaft.
2) Place leading edge of sensor holder into opening.
3) Pivot holder into place. legs should enter slots and snap in place.
CAUTION: The optical sensor legs are fragile and may break. If the optical sensor legs break or crack, we
recommend replacement. A damaged sensor may result in improper regeneration.
CAMSHAFT
The camshaft has several lobes that push open the valve discs as the camshaft rotates. Rotation is controlled by
a drive motor that drives a gear at the rear of the camshaft. The front end has a cup with markings and slots.
CAUTION: The camshaft slots are molded to exact dimensions. Do not attempt to modify the cam cup
slots. Improper regen will occur!
The outside surface of the cup has an arrow mark. When the arrow is at top center, the camshaft is in the load-
ing position. 90 degrees to the right on the cup an optical sensor is mounted to the top plate. This sensor reads
the slots as they pass through. The largest slot is “Home” and the remaining slots are positioned to signal the
regeneration cycles.
When looking at the end of the camshaft, numbers are visible in the hollow of the cup. An arrow on the top plate
points to the current marking. The numbers represent regeneration cycles as follows:
C0 = Treated water - normal operation mode
C1 = Backwash
C2 = Brine draw
C3 = Slow Rinse
C4 = System pause
C5 = Fast rinse cycle 1
C6 = Backwash cycle 2
C7 = Fast rinse cycle 2
C8 = Brine refi ll
These numbers are offset rotationally 90 degrees from the matching slot. The offset enable the service person
to view the number at the top of the cup and determine which slot is at the optical sensor.