Evoqua Wallace & Tiernan V-2000 Series, Manual

Page: 47 / 110

Wt.025.055.002.Ua.iM.0814
ManUal Chlorinator - 500lB/24hr
32
eVoQUa W3t110693
• Cleaning Anti-Syphon Injector Lower Portion
a. Unscrew lower union nut (10), carefully remove bottom cap, and take
out diaphragm assembly. Clean off any deposits with warm (110°-
125°F) water. It is not necessary to disassemble the diaphragm unit
to do this.
b. Remove O-rings (17) from guide pins (13). Clean O-ring groove on guide
pins. Do not scrape with a knife blade or any such instrument. Only
warm water (110°-125°F) is permissible. Wipe a thin film of Halocar-
bon grease on the new O-rings before installing them on the guide
pins (13). Loosen screws (20) 3/4 of a turn from their tight position, if
disassembled.
c. Remove spring (22) and wipe off any deposits found.
d. Reinstall spring and diaphragm assembly into bottom cap. Reassemble
bottom cap to body with union nut.
4.12.8 Cleaning 1" Fixed Throat Injector (Standard) (See Dwg. 25.200.002.030)
• Cleaning Injector Unit Diaphragm Backcheck
a. Turn off the gas supply. Allow the gas feeder to run until the float drops
and settles on the bottom stop.
b. Shut off injector operating water.
c. Take steps to prevent water flowing back toward the injector from the
point of application.
d. Unscrew stem (11) in the center of the top of the injector. Remove and
discard O-ring (5).
e. Wipe the surface of the spherical tip of stem with a clean cloth or pa-
per towel to remove any loose material. Soak briefly in 10% muriatic
(hydrochloric) acid if there are any deposits that do not wipe away
with plain water. If the spherical surface is indented, worn, eroded, or
scratched, replace valve stem (11).
WARNING: TO AVOID POSSIBLE SEVERE PERSONAL INJURY OR EQUIP-
MENT DAMAGE WHEN USING HYDROCHLORIC ACID, OBSERVE ALL SAFETY
PRECAUTIONS RECOMMENDED BY THE ACID MANUFACTURER/SUPPLIER.
f. Wipe a thin film of Halocarbon grease on the O-ring (5) before install-
ing it on the stem.
g. Look through the opening in the top of the injector with a flashlight and
examine the conical hole and O-ring in diaphragm screw immediately
!