IM 25.055AC UA (C/6-01)
AUTOMATIC CHLORINATOR - 3000LB/24HR
40
time, float movement in the rotameter is not proportional to V-notch plug
adjustment, as shown by a sudden marked rise or drop for a small amount
of plug adjustment, the V-notch plug requires cleaning.
a. Turn the knob on the vacuum regulator(s) to OFF. After the supply
vacuum gauge reads 100 inches of water and the rotameter float rests
on the bottom stop, shut off the injector water supply.
b. Remove the V-notch assembly completely from the control module.
c. Using running water or a cup full of water and a small, stiff brush
(such as a toothbrush), scrub out the V-notch groove and the shank
of the plug. Do not use a knife, a scraper, or a file to clean out the
groove. Dissolving action and scrubbing are all that is required.
WARNING: DO NOT USE HYDROCARBONS OR ALCOHOLS
BECAUSE RESIDUAL SOLVENT MAY REACT WITH THE GAS.
SOLVENTS CAN PRODUCE SERIOUS PHYSIOLOGICAL EF-
FECTS UNLESS USED IN STRICTEST COMPLIANCE WITH THE
SOLVENT MANUFACTURER’S SAFETY RECOMMENDA-
TIONS.
d. Dry the plug with a clean cloth or paper towel.
e. Remove the seal, the clamping screw (36), and the extension cham-
ber. Clean and inspect the orifice and the O-ring (40) and replace
them, if necessary.
f. Wipe a thin film of Halocarbon grease on the gaskets of the V-notch
assembly. Reinstall it in the control module and resume operation.
4.11.5 Cleaning Injector Throat and Tailway
The injector will not operate properly unless all the ports are clear. This
point is easily checked visually after the throat has been removed.
Water containing carbonates, manganese, or iron will frequently leave a
deposit in injector tailways. As this deposit increases in thickness, it can
become scaly or rough and adversely affect pressure recovery or increase
backpressure so that the injector fails to develop adequate operating vacuum.
Such deposits are readily recognizable by their black or reddish color. They
may be removed by immersing the throats in dilute (10%) hydrochloric
acid, known commercially as muriatic acid.
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