Water Specialist WS1TT, Чертежи и руководство по обслуживанию

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WS1TT Drawings and Service Manual Page 21
The WS1TT control valves consist of the following components:
1. Drive Assembly
6. Drain Line Flow Control and Fitting Assembly
2. Drive Cap Assembly, Main Piston and Regenerant Piston 7. Water Meter
3. Spacer Stack Assembly 8. Twin Transfer Valve
4. Injector Cap, Screen, Injector Plug and Injector
5. Re
fi ll Flow Control Assembly or Re fi ll Port Plug
Drive Assembly
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 display shows different types of information in the initial system set up (for softeners or
fi lters), installer display settings,
diagnostics, valve history or user display settings.
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
fi ts 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, re fi ll 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 re fl ective 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, Main 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 speci
fi c positions to direct the fl ow of water to backwash, regenerate, rinse or re fi ll. 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 de
fi ned by a number of pulses. The counter is zeroed each time the valve
goes to the service position. The PC board fi nds 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 fl exibility and
requires no switches or cams (U.S. Patent 6444127).
One of two main pistons is always used:
1. A 1.25" diameter downfl ow piston is used when the WS1TT control valve is used as a downfl ow softener, regenerating
fi lter or non-regenerating fi lter.
2. A 1.25" diameter upfl ow piston is used when the WS1TT control valve is used as an upfl ow softener. Upfl ow option not
applicable for EA, EE or EI control valves.
If the control valve is used as a softener or a regenerating fi lter, a regenerant piston must be attached to the main piston. If the
control valve is to be used on a system that does not require a regenerant to be added, the regenerant piston must be removed.