Wallace & Tiernan SERIES V-2000, Руководство пользователя

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WT.025.055.004.UA.IM.0814
MANUAL CHLORINATOR - 3000LB/24HR
EVOQUA W3T109620
• Application Against Negative Head
If the injector described above was used where a negative head existed
at the injector discharge, when the injector was shut down, this suction
might act on the diaphragm (G) with sufficient force that the spring (J)
could not close the seat (H), with the result that gas would be drawn from
the gas feeder.
To prevent this, an injector suction shut-off unit is added to the injector.
When the three-way valve is in the OFF position, this unit, by the force of
the spring (K) through the diaphragm (L) and the attached linkage, exerts a
pull on the diaphragm (G) and holds the seat (H) closed. When the three-way
valve is in the ON position, pressure from the chamber (C) is transmitted
to the diaphragm (L) and the injector operates as described above.
3.3.2 2" Injector Intermittent Start-Stop Operation (See Dwg. 25.100.181.021)
When the injector is connected to operate in conjunction with a pump, a so-
lenoid valve is added so that, when the three-way valve is in the START-STOP
position, electrical operation of the solenoid performs the same function as
manual operation of the three-way valve as previously described. When the
solenoid is energized, water passes from the injector water supply through
the strainer (M), then through the solenoid (N) and the three-way valve to
the chamber (C). When the solenoid is de-energized, the water supply is cut
off and the exhausted port is opened, permitting the pressure chamber (C) to
be relieved to waste.
3.3.3 2" Injector Prime and Flush Operation (See Flow Dwg. 25.100.181.031)
In applications such as the intermittent desliming process, it is desirable to run
water through the system before and after chlorination. This is accomplished
with a two-solenoid system. Operation is a follows: Both three-way valves are
set in the START-STOP position. Energizing only the right-hand solenoid (WV)
passes water to the chamber (C) causing the plug in the injector to open and
water to flow through the injector for priming. The injector suction shut-off
unit prevents the flow of gas until the chlorination period when the left-hand
solenoid (CSV) is energized. At the end of the chlorination period, the left hand
solenoid is de-energized and the injector shut-off unit stops the flow of gas.
Water continues to flow through the injector for flushing until the end of the
cycle, when the right-hand solenoid is de-energized. Operation of the solenoids
is usually accomplished by use of a program clock in which each portion of the
cycle may be fixed by setting adjustable cams.