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IV. MAInTEnAnCE
1. Yearly Maintenance
1.1 Chlorine Pressure Chamber Cleaning
It is important to inspect and clean the chlorine pressure chamber for signs of corrosion, buildup of
debris and clogging. It is recommended to be done on a yearly basis. Ignoring this maintenance
step can lead to serious malfunctions of the vaporizer. In some instances it may be cheaper, less
time consuming and more reliable to replace the chlorine pressure chamber rather than clean it. The
operator should determine this on a case by case basis.
Warning: When performing this step, ensure that all protective equipment for handling chlorine
gas/liquid is available.
a. Refer to Section III.4.2 and complete the long term shutdown, ensuring that all chlorine has been
purged from the system.
b. Disconnect all power and remove all electrical connections to the top flange and collar plate.
Disconnect the inlet and outlet unions.
c. Remove the fiberglass cabinet.
d. Using a flashlight, inspect the outer surface of the chlorine pressure chamber using the 3"
inspection hole in the collar plate. If signs of corrosion exist, proceed to Section IV.2.
e. Disconnect the collar plate from the water tank and use the overhead lift to move the inner chamber
assembly to a well-ventilated location.
f. Remove the top flange of the inner chamber assembly. Using a flashlight, inspect the lead gasket
seal areas and the interior of the inner chlorine pressure chamber for corrosion and residue. If
signs of corrosion exist, proceed to Section IV.2.
g. Using water or appropriate cleaner, purge the internal surfaces of the inner chlorine pressure
chamber until all residue has been removed.
h. Once clean, inspect again for signs of corrosion. If signs of corrosion exist, proceed to Section
IV.2.
i. Using a new lead gasket, install the flange onto the chlorine pressure chamber. Be sure to replace
any worn or damaged flange nuts or bolts. Torque pressure chamber bolts to 275 lb-ft (3802 N-m).
j. Clean water tank and remove any magnesium that may have deposited on the bottom of the water
tank.
k. Install the chlorine pressure chamber onto the water bath tank with a new rubber gasket and
connect the process piping. Be sure to replace any worn or damaged flange nuts or bolts.
l. Remove and inspect the heater elements for calcium or other build up that will result in inefficient
heat transfer. Clean the elements and heater assembly before re-assembly and replace the heater
gasket.
m. Re-install all electrical connections/instruments, connect the power, and reconnect the chlorine
manifold piping with new lead gaskets.
n. Proceed to Sections III.1 and III.2 for leak testing and initial start up to resume chemical feed.
