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3 Copyright: Chart Industries, Inc., Jan. 2003 <br />The vessel’s Sure-Fill assembly enables fast, trouble- <br />free fi lling without having to manually vent excess <br />pressure that might develop during a CO2 delivery. <br />The Sure-Fill automatically maintains the optimum <br />internal vessel pressure during the fi ll process by <br />venting excess pressure outdoors through the safety <br />vent and fi ll box. This vent process stops when the <br />vessel is full. <br />Gas Use Circuit <br />Carbon dioxide gas is supplied to the use point through <br />the gas use circuit. The Carbo-Max 750 withdraws <br />liquid CO2 from the bottom of the inner vessel through a <br />vaporizer coil where it converts to gas for fi nal line use. <br />The conversion from liquid to gas occurs when liquid <br />CO2 fl ows through a stainless steel vaporizer/gas use <br />coil located between the inner and outer vessel walls. <br />As it is needed, carbon dioxide gas is produced by the <br />vaporizer coil. Then it passes through the isolation valve <br />and fi nal line regulator to the point of use. <br />The fi nal line regulator controls gas fl ow to the use-point. <br />The factory setting on the fi nal line regulator is 90 psi <br />but the pressure may be adjusted to the needs of the <br />application. The regulator setting for soft drinks is <br />commonly between 90 and 115 psi. Secondary pressure <br />regulators may be added ‘downstream’ for applications <br />such as bag-in-the-box, beer, or diet systems. <br />Consult with the use-point equipment manufacturer for <br />the proper regulator and pressure setting. <br />Liquid Supply Port <br />The Carbo-Max 750 is equipped with an alternative <br />liquid CO2 supply port. This port should be used only <br />for high demand applications that require CO2 to be <br />dispensed in liquid form. The vessel’s gas supply and <br />liquid supply ports may be used simultaneously for <br />separate applications. <br />Pressure Control Circuit <br />The pressure control circuit (also called the <br />economizer circuit) assists in regulating the <br />operating pressure of the vessel. It maintains the <br />correct operating pressure while it conserves gas <br />for effi cient system performance. <br />Suffi cient internal vessel pressure is needed for <br />supplying CO2 gas and for preventing the stored liquid <br />Liquid CO2Dispense Port <br />Gas Delivery <br />Circuit <br />Fill Circuit <br />Sure-FillTM Circuit <br />Economizer Circuit <br />Vaporizer Coil <br />6” (15.2 cm) Uni-body Legs <br />Vent Circuit