Wallace & Tiernan SERIES V-2000, Руководство пользователя

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WT.025.055.004.UA.IM.0814
MANUAL CHLORINATOR - 3000LB/24HR
EVOQUA W3T109620
3.2.4 Adjustment of Injector
Fixed throat injectors are not adjustable. Other injectors may be adjusted by
means of an adjusting screw or knob at the bottom of the injector. A vacuum
of at least six inches of mercury is required to obtain maximum feed. If the
minimum vacuum cannot be obtained, check the actual hydraulic conditions
against those specified on the order before attempting any service.
To adjust the injector for maximum suction power, start the gas feeder with
the feed rate at the maximum required. Turn the adjusting screws clockwise
(up) or counterclockwise (down) until the highest vacuum is obtained. To adjust
the injector for minimum water usage, start the gas feeder and set the feed
rate at the maximum required. Screw in (up) on the adjusting screw until the
vacuum is just over the minimum required.
3.2.5 Intermittent Start-Stop Operation
In some cases, it is necessary to start and stop the gas feeder in synchronism
with other equipment. A common situation is one where the gas feeder must
operate when a water supply pump operates and must stop when the pump
stops.
In this case, an electrically operated solenoid water valve is installed in the
main injector water line. The valve is wired into the water supply pump mo-
tor circuit so it will operate to open the water supply to the injector when the
pump is on, and to shut off the water supply to the injector when the pump is
off. In this manner, the gas feeder is prevented from delivering gas to the point
of application unless the pump is operating.
3.2.6 Preparation for Winter Shut-Down
If the gas feeder is to be shut down for an extended period during freezing
weather, the following procedure must be followed:
a. Operate the injector with the gas supply turned off at the supply container
valve(s) until the supply vacuum gauge reads 100 inches of water, then turn
off the vacuum regulator. Continue injector operation for at least three
minutes to remove all gas from the machine.
b. Shut off the water supply and drain the line to the injector.
c. Drain the solution discharge line and prevent any water flow into the line.
d. Drain any water in the injector.
NOTE: If the control module is to be removed for storage, seal the gas inlet
fitting and all gas lines with rubber stoppers to prevent the entrance of at-
mospheric moisture during the storage period. If a pump is used, follow the
pump manufacturer instructions for extended shutdown.