Intro4u2u

• The drive assembly consists of the following parts:

• Drive Bracket
• Printed Circuit (PC) Board
• Motor
• Drive Gears
• Drive Gear Cover
The drive bracket holds the PC board, the motor, the drive gears and the drive gear cover in place.
The PC board receives and retains information, displays the information, determines when to regenerate and initiates regeneration.
The PC board powers the motor. The PC board’s two-prong jack connects wires to the direct current (DC) motor. The motor is held
in place on the drive bracket by a spring-loaded clip and a small bulge in the plastic, which fits in one of the slots on the motor
housing. The motor turns drive gears that drive the piston to cycle positions for backwashing, regeneration, rinsing, refill or service.
The motor is fully reversible (turns both ways) and changes direction of rotation to change the direction of piston motion. The motor
is easily replaced if necessary.
There are three drive gears held in place by the drive gear cover. All three drive gears are the same size. A reflective coating is
applied to the gears. As the center drive gear turns a light shines on the coating and a light sensing diode determines if a light pulse
was returned. The PC board counts the pulses and determines when to stop driving the motor.
Drive Cap Assembly, Downflow Piston and Regenerant Piston
The drive gears turn the main gear of the drive cap assembly, which moves the piston. The screw-driven, horizontally moving piston
stops at specific positions to direct the flow of water to backwash, regenerate, rinse or refill. The PC board determines the position
of the piston by counting pulses produced when the piston is moved. An optical sensor looking at one of the reduction drive gears
generates these pulses. Each cycle position is defined by a number of pulses. The counter is zeroed each time the valve goes to the
service position. The PC board finds the service position by noting the increase in current delivered to the motor when the mechanical
stop at the service position is reached. This method of controlling piston position allows for greater flexibility and requires
no switches or cams (U.S. Patent 6444127).
The downflow piston is used when the control valve is used as a down flow softener, regnerating filter or non-regenerating filter. If
the control valve is used as a softener or a regenerating filter, a regenerant piston must be attached to the downflow piston. If the
control valve is to be used on system that does not require a regenerant to be added the regenerant piston must be removed.
Spacer Stack Assembly
The spacer stack assembly provides the necessary flow passage for water during the different cycles. The all plastic spacer stack
assembly (U.S. Patent 6402944) is a one-piece design which allows the stack to be removed using your fingers.
The exterior of the stack is sealed against the body bore with self lubricating EPDM o-rings while the interior surface is sealed
against the piston using slippery self cleaning directional (one-way) silicone lip seals. The lip seals are clear and have a special
slippery coating so that the piston does not need to be coated or lubricated.
WS1TC Manual Page 9
Injector Cap, Screen, Injector Plug and Injector
The screen, injector and/or injector plug(s) are installed under the injector cap in an easy to access location on top of the valve. The
injector cap contains four slots so no water accumulates in the cap. The injector cap is designed to be hand tightened.
Under the injector cap there is an easy to clean removable screen to prevent fouling of the injector. There are two holes under the
injector cap labeled “DN” and “UP”. The holes will be filled with a plug or an injector.
The plug (Order # V3010-1Z) prevents water from traveling a certain pathway. The injector lets water pass through the pathway.
The self-priming injector increases the velocity of the water, creating a zone of negative pressure that draws in the concentrated
liquid regenerant, such as sodium chloride (brine), potassium permanganate, sodium hydroxide, hydrochloric acid, etc. The
regenerant blends with the stream of water, which passes through the media to regenerate the bed.
The injector provides a consistent regenerant/water mixture ratio over the entire operating pressure range of the control valve. The
injector provides good performance in a variety of applications, which may involve elevated drain lines and long regenerant draw
lengths. Injectors are chosen by knowing the type, amount, and regenerant flow rate for a particular type of media. Guidelines can
be found in the media manufacturer’s literature. The color coded injectors give different regenerant draw, slow rinse and total flow
rates over the pressure range. See Table 4 for color codings and injector graphs for total,