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� <br /> � <br /> � B. Evacuate system to 20" vacuum and charge with refrigerant until a <br /> � pressure of 15 psig is reached. Then test for leaks using a Halide <br /> leak detector. Conect leaks found. <br /> , C. Pressurize system, with carbon dioxide or nitrogen,to 300 psig on <br /> ' the high side, and 200 psig on the low side, and test for leaks. <br /> Correct leaks found. <br /> � 33 SYSTEM DEHYDRATION <br /> ! A. Dehydrate system by "Double Dehydration" method. <br /> � B. Use a suitable vacuum pump. Evacuate system to a vacuum of 0.2" <br /> I � Hg absolute and operate pump for eight hours when that pressure is <br /> Ireached. <br /> ; <br /> C. After eight hours, admit dry nitro�en directly to the system, and <br /> ithen evacuate system to a vacuum of 0.2" Hg absolute and operate <br /> pump for four hours. <br /> ' 3.4 CHARGING SYSTEM <br /> • ; A. When system dehydration is complete and all leaks are conected, <br /> icharge system with refrigerant. <br /> I <br /> END OF SECTION <br /> I <br /> �' i <br /> , <br /> � i <br /> � <br /> � � <br /> � ICT 99184 <br /> � � SECTION 15065 - 3 <br /> � <br /> � ; <br /> ' I <br />