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Jan 08 14 10:43a Aquatic Resource Group 704-583-0730 p.6 <br /> C. Ultraviolet temperature control system shall be provided to maintain system integrity in the event of flow <br /> interruptions to the chamber. <br /> D. Ultraviolet chamber shall come complete with annealed quartz sleeve with "O"ring seats for water tightness. <br /> E. Chambers shall be complete with ANSI flanges and all ports or vents shall be threaded NPT. The Ultraviolet <br /> chamber must be capable of installation in the system so that it remains full under all conditions. <br /> F. The ultraviolet unit must be complete with appropriate brackets or feet for ease of installation in either vertical <br /> or horizontal mounting. <br /> G_ The Chamber shall have a sacrificial anode attached to the chamber,extending inside the <br /> chamber and be bonded to the installation bond loop. <br /> H. The Chamber must be mounted in an isolated full flow bypass for the purpose of maintenance while <br /> circulation system is operating. <br /> 2.04 ULTRAVIOLET LAMP <br /> A. Ultraviolet lamp shall be medium pressure high intensity. Lamp shall be designed to emit continuous <br /> Ultraviolet wavelengths in the range of 200nm to 400nm. This will provide optimal disinfection benefits and <br /> destruction of the Monochloramine, Dichloramine, and Trichloramine compounds. Lamp must remain <br /> unaffected by temperature variance of 0 degrees to 200 degrees Fahrenheit. <br /> B. The lamp system must provide a constant dose of not less than 60 mjlcm2 until the end of the lamp life for <br /> indoor applications and not less than 40 mj1cm2 for outdoor disinfection and this must be based on constantly <br /> monitoring the full recirculating flow rate, not on a side stream treatment. Power stepping systems are not <br /> acceptable. <br /> C. System must operate independently to maintain dose setpoint of desired mjlcm2 utilizing thyristor controls. <br /> 2.05 AUTOMATIC WIPER SYSTEM <br /> A. An automatic cleaning system shall be provided for cleaning of quartz sleeve and Ultraviolet monitor probe. <br /> The system shall travel the entire length of the quartz sleeve twice per desired cleaning cycle. Precision <br /> molded wiper rings shall be provided to ensure thorough quartz tube cleaning and quartz tube protection. <br /> Wiper cycle shall be user selectable and adjustable within a range of 15 minutes to 24 hours depending on <br /> anticipated application and deposit build-up. At a minimum the Automatic Wiper system shall have the <br /> following characteristics: <br /> 1. System shall utilize direct Belt Drive with square machined pulleys and shafts to prevent slippage and pin <br /> shearing. Systems utilizing shear pins or complicated gear boxes will be unacceptable. <br /> 2. Wiper power supply shall be 24 volt DC for improved safety.Higher voltage not acceptable. <br /> 3. System shall incorporate Direct Shaft Encoding for positional location. Systems relying on external limit <br /> switches or internally located magnets will be unacceptable. <br /> 4. Wiper interval shall be operator selectable with optional override switch. <br /> 5. Wiper faults are to be indicated on the control system display. <br /> 6. Wiper System to utilize "Intelligent Operation"for automatic start-up commissioning. <br /> a. Records wiper position at chamber ends. Position must be fixed and not dependent on a timed <br /> interval or component striking end of chamber. <br /> b. Establish a travel run without setting limit adjustments to ensure system integrity and longevity. <br /> 2.06 ULTRAVIOLET CONTROL SYSTEM <br /> A. Control cabinet shall be Engineered Treatment System SPECTRA Touch control unit. (Phone: 920-885-4386) <br /> Systems shall be epoxy coated NEMA 12 rated cabinet. If mounted outdoors they must be NEMA4X with an <br /> integral A/C unit to protect the components from the environment.Three levels of operation shall be provided <br />