Untitled - Senate Judiciary Committee

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AUTOMATIC CYCLE-CONTROLLER--OPERATION
ELECTRIC-SIGNAL ACTUATED
The function of the automatic cycle controller is to start, regulate, and end the regeneration of
a softener or dealkalizer, or the backwash of a filter. The complete cycle controller consists of
two subassemblies--an electrical timing mechanism and a motor-driven pilot valve. This cycle
controller is actuated by an electric signal from an automatic-reset meter, hardness monitor, or
other signal-producing device designed for this use. A built-in push-button switch caqi be used to’
initiate regeneration, if desired. In an emergency, the cycle controller can be operated manually
by turning the Position Dial by hand and timing each step.
THEORY OF OPERATION
TE RMINAL
BLOCK
INDICATO LIGHT
In operation, the electric timing mechanism is actuated by an electric sgn&l froma automatic:
reset meter or hardness monitor, and the cycle adjustment knob begins to rotate slowly in a
clockwise direction. This rotation closesa switch which energizes the pilot drive motor. The pilotdrive
motor will rotate the pilot valveclockwisei90 when at this point a micro-switch opens,
stopping the pilot-drive motor. The cycle-adjustment knob continues to rotate.
The pilot valve, which is urer,pressure, is.connected to the multiport control valve by a series of
tubes. The rotation of the pilot vents some of the diaphragm ports, allowing them to open while
pressuring others and forcing them closed. This shifts the multiport valve from the SERVlCE
(No.l) position to BACKWASH (No. 2). The setting on the cycle-adjustment knob determines
the length of the BACKWASH cycle.
After this period, the cycle-adjustment knob closes a second switch which energizes the pilotdrive
motor. The pilot valve will again rotate clockwise 90 where a micro-switch stops the
pilot-drive motor. This second rotation of the pilot valve opens and closes a different series of
valve ports, and the multiport valve shifts from the BACKWASH (No. 2) position to BRINE/
RINSE (No. 3).
After the BRINE/RINSE cycle, the cycle-adjustment knob closes a third switch and energizes
the pil0t-drive motor. The pilot valve will rotate clockwise 90 where a micro-switch opens,
stopping the pilot-drive motor. This rotation of the. pilot valve causes a third series of valve
ports to open and close, shifting the multiport valve from the BRINE/RINSE (No. 3).position
to FLUSH (No. 4).
When the FLUSH cycle has been completed, the cycle-adjustment knob closes a fourth switch,
energizing the pilot-drive motor. The pilot valve will again rotate clockwise 90 and shut off.
At this point, a different series of valve-ports will cpen and close, shifting the multiport valve
from the FLUSH (No. 4) position to SERVICE (No. 1). The cycle contoller will remain in
the SERVICE position until the next scheduled cycle or until manually started by an operator.
Throughout the regeneration, the position of the multiport valve is shown on the Position
Dial located at the rear of the pilot valve.