Service Instructions - Clack Valve WS1 CD Matrix Operation And Instruction Manual

Service Instructions

Drive Assembly
Remove the valve cover to access the drive assembly.
Disconnect the power source plug (black wire) from the PC board prior to disconnecting the motor or water meter plugs from the PC
board. The power source plug connects to the four-pin jack. The motor plug connects to the two-pin jack on the left-hand side of the
PC board. The water meter plug (gray wire) connects to the three-pin jack on the far right-hand side of the PC board.
The PC board can be removed separately from the drive bracket but it is not recommended. Do not attempt to remove the display
panel from the PC board. Handle the board by the edges. To remove the PC board from the drive bracket, unplug the power, water
meter and motor plugs from the PC board. Lift the middle latch along the top of the drive bracket while pulling outward on the top of
the PC board. The drive bracket has two plastic pins that fit into the holes on the lower edge of the PC board. Once the PC board is
tilted about 45° from the drive bracket it can be lifted off of these pins. To reinstall the PC board, position the lower edge of the PC
board so that the holes in the PC board line up with the plastic pins. Push the top of the PC board towards the valve until it snaps under
the middle latch, weave the power and water meter wires into the holders and reconnect the motor, water meter and power plugs.
The drive bracket must be removed to access the drive cap assembly and pistons or the drive gear cover. It is not necessary to remove
the PC board from the drive bracket to remove the drive bracket. To remove the drive bracket start by removing the plugs for the
power source and the water meter. Unweave the wires from the side holders. Two tabs on the top of the drive back plate hold the drive
bracket in place. Simultaneously lift the two tabs and gently ease the top of the drive bracket forward. The lower edge of the drive
bracket has two notches that rest on the drive back plate. Lift up and outward on the drive bracket to disengage the notches.
To reassemble, seat the bottom of the drive bracket so the notches are engaged at the bottom of the drive back plate. Push the top of
the drive bracket toward the two latches. The drive bracket may have to be lifted slightly to let the threaded piston rod pass through the
hole in the drive bracket. Maintain a slight engaging force on top of the drive bracket while deflecting the bracket slightly to the left
by pressing on the side of the upper right corner. This helps the drive gears mesh with the drive cap assembly. The drive bracket is
properly seated when it snaps under the latches on the drive back plate. If resistance is felt before latching, then notches are not fully
engaged, the piston rod is not in hole, the wires are jammed between the drive bracket and drive back plate, or the gear is not engaging
the drive cap assembly.
To inspect the drive gears, the drive gear cover needs to be removed. Before trying to remove the gear cover, the drive bracket must be
removed from the drive back plate. (Refer to the instructions above regarding removing the drive bracket from the drive back plate.
The drive gear cover can be removed from the drive bracket without removing the motor or the PC board.) The drive gear cover is
held in place on the drive bracket by three clips. The largest of the three clips is always orientated to the bottom of the drive bracket.
With the PC board facing up, push in and down on the large clip on the drive gear cover. Handle the cover and the gears carefully so
that the gears do not fall off the pegs in the cover.
Replace broken or damaged drive gears. Do not lubricate any of the gears. Avoid getting any foreign matter on the reflective coating
because dirt or oils may interfere with pulse counting.
The drive gear cover only fits on one way, with the large clip orientated towards the bottom. If all three clips are outside of the gear
shroud on the drive bracket the drive gear cover slips easily into place.
The drive bracket does not need to be removed from the drive plate if the motor needs to be removed. To remove the motor,
disconnect the power and motor plugs from the jacks on the PC board. Move the spring clip loop to the right and hold. Rotate the
motor at least a ¼ turn in either direction so the wires are vertical (up & down) before gently pulling on the wire connectors to
remove the motor. Pulling directly on the wires without rotating the motor may break the wires off the motor.
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