Evoqua Wallace & Tiernan V-2000 Series, Manual

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Wt.025.055.002.Ua.iM.0814
ManUal Chlorinator - 500lB/24hr
27
eVoQUa W3t110693
4.12.3 Cleaning Rotameter
If a milky-white, powdery-white, green-slimy, or brown-oily deposit is visible
inside the rotameter tube or if the float has particles clinging to it or tends to
stick to the tube wall at lower feeds, it is time to clean the rotameter. Proceed
carefully to avoid dropping the glass tube or losing the float down a floor drain
or grating. To facilitate handling the float, have a clean cup, such as a coffee
cup or a small beaker, and a pair of tweezers at hand before starting. Proceed
as follows:
a. Turn the knob on the vacuum regulator(s) to OFF. After the supply vacuum
gauge reads full scale and the rotameter float rests on the bottom stop,
turn off the injector operating water.
b. Exert downward force on lower bell of rotameter with one hand. Use two
fingers of other hand to swing top of rotameter outward. Lift rotameter.
Take care not to lose the end stops, the float, or any of the O-rings. See
Dwg. 25.100.150.012.
c. Place the end stops and float into the cup mentioned above.
d. Many gas contaminants are soluble in water. Hold the tube end under run-
ning, warm (110-125°F) water so that the water enters the tube at one end
and exits at the other to flush out deposits. Alternately, soak the tube in
a container of warm water for about 30 seconds. Then hold the tube, half
full of water, with palms capping the ends and shake vigorously endwise
for a few seconds. Discharge the water and repeat until clean. A common
pipe cleaner may be used to scrub the interior. A detergent will promote
cleaning action.
WARNING: DO NOT USE HYDROCARBONS OR ALCOHOLS BECAUSE
RESIDUAL SOLVENTS MAY REACT WITH THE GAS. SOLVENTS CAN PRO-
DUCE SERIOUS PHYSIOLOGICAL EFFECTS UNLESS USED IN STRICTEST
COMPLIANCE WITH THE SOLVENT MANUFACTURER'S SAFETY RECOM-
MENDATIONS.
e. Drain and let dry. Do not use a pipe cleaner as a drying tool because the lint
from it will stick to the tube interior. Place the tube at an angle between
a horizontal and vertical surface (as between a shelf and a wall) with both
ends open so air can flow through. Drying will be hastened by heat, as
from a light bulb nearby. Do not blow through the tube as moisture from
the breath will condense on the tube walls.
f. To clean the float, pour about an inch of warm to hot (130-150°F) water
into the cup containing the float. Grasp the float with tweezers and shake it
side to side while submerged for a few seconds. Release the float and pick
it up again and repeat the action several times so all surfaces are washed.
!