IM 25.055AC UA (C/6-01)
AUTOMATIC CHLORINATOR - 3000LB/24HR
22
3.2.2 Stopping - For Short Periods
Turn off the injector water supply. (For two-inch injector, turn off the
injector shut-off valve.)
3.2.3 Stopping - For Extended Periods
a. Turn off the gas supply at each supply container valve.
b. Operate the injector until the supply vacuum gauge reads 100 inches
of water, and then turn off the vacuum regulator. Continue injector
operation for at least three minutes to remove all gas from the ma-
chine.
c. Turn off the injector water supply. (For two-inch injector, turn off the
injector shut-off valve.)
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 hydrau-
lic 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 clock-
wise (up) or counterclockwise (down) until the highest vacuum is ob-
tained. 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
motor 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
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