De Nora Capital Controls 71V3B Series Instruction Manual
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Contents
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115.6031.0 - 24 -3.3 Electrical1) Apply AC power to the control circuit connection box (see Figures 6 through 9).2) Energize the immersion heater by closing the circuit breaker in the power supply line to theheater. While the Vaporizer is warming-up, leak test all piping.NOTEAll connections must be made in accordance with theNational Electrical Code, NFPA-70 and/or all applicable local codes.WARNINGElectrical Shock Hazard. AC powered electrical equipment presents a potential shockhazard. Installation and servicing should only be performed by qualified personnel.3.4 Checking for Leaks and Placing in OperationNOTEInspection must conform to the requirements of State and Local Regulatory Agencies.In some instances, visual inspection by trained personnel is considered sufficient.In other instances, pressure testing of all piping and assemblies using dry air ornitrogen is necessary to meet these requirements.1) Inspect all joints in the liquid chemical supply and gas discharge lines to make certain thejoints are tight.2) A thorough leak test should be performed before any chemical is permitted to enter thesystem. This test should be done using an inert gas such as dry air or Nitrogen. To test for leaks,open all in-line valves between the liquid chemical supply valve and the Gas Dispenser(s),including the valve in the by-pass line around the electrically operated pressure reducing andshut-off valve to provide a path around the de-energized (normally closed) valve.CAUTIONDo not open the header valve closest to the chemical supply.WARNINGBREAKAGE OF A CHEMICAL PIPE, VALVE OR FITTING CAN CAUSE A MAJORHAZARDOUS CHEMICAL SPILL. NEVER tighten or adjust any leaking fitting whenthe chemical supply cylinder valve is open.WARNINGSystem leaks and the procedures required to find leaks may cause exposure tohazardous chemicals at levels that exceed Occupational Safety and HealthAdministration (OSHA) limits. It is the employer’s responsibility to insure that properequipment and procedures are used to limit the employee’s exposure tothe safe levels listed by OSHA.3) Be sure that the treatment system is ready to receive the gas solution.4) Turn on the gas dispenser by allowing water to flow through the ejector and watch the feedrate on the dispenser flow meter. A major piping leak will produce flow indication as air entersthe system through the leak. If the meter indicates a leak, listen to each joint until the leak isfound, and make the necessary repair. The flow meter will register major leaks only.5) If no major leaks appear, pressure test the system for minor leaks. First, turn off the watersupply to the ejector, but leave the dispenser rate valve open. If a leak does appear, simplystarting the water supply to the ejector will draw the gas from the system quickly and safely. |
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