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SYSTEM OPERATION. <br /> The system is designed to operate continuously. In applications where the water is heavily <br /> contaminated, or where other treatment equipment is operating along with the CSF system, 24 <br /> hour operation may be required. We recommend that at least during normal hours of operation, <br /> and periodically during periods of shut down, that the equipment is operated to ensure circulation <br /> of water in the complete system including the storage sump/tank. This minimizes the possibility <br /> of bacterial contamination of any of the water in the system and consequent odors and/or dangers <br /> to health. Automatic operation is possible using factory-supplied options. Please consult the <br /> factory for further information. <br /> The system operates as follows: <br /> 1. Water in the storage tank/sump is pumped from the sump/tank to the coalescer. When the <br /> water in the sump/tank reaches a low level, a level switch in the sump/tank stops the <br /> pump. <br /> 2. The water is passed to the coalescer where free oil is removed and passes out of the <br /> coalescer into a storage vessel for future disposal. <br /> 3. The water now passes by gravity to the treatment tank. If the treatment tank fills up, a <br /> high level switch stops the supply pump, thereby preventing overflows. <br /> 4. If the total amount of water in the complete system reaches a point where the treatment <br /> tank reaches only approximately 1/3 full, a level switch automatically introduces fresh <br /> water to maintain the level in the system. <br /> 5. Water is transferred by the circulating pump from the treatment tank through the sand <br /> filter, and is then returned to the treatment tank. If the water in the treatment tank falls to <br /> a level at which the pump may lose suction, a low level switch shuts of the circulating <br /> pump, preventing damage to the pump. <br /> 6. As water is required from the system, it first passes through a polish filter which controls <br /> the final size of any solids remaining in the water. <br /> 7. Chlorine or other biocide is added to the water to control the formation of bacteria and/or <br /> algae. A small amount of chlorinated water is continuously returned to the storage <br /> sump/tank to control bacteria and/or algae in all the water in the system. <br /> 8. When the system is operating, no normal supervision is required, although several checks <br /> should be carried out during the normal working day to ensure that the system is operating <br /> according to specifications. <br /> 14 <br />