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5.5 Reuse Existing Refrigerant Lines <br /> If using existing refrigerant lines make certain <br /> that all joints are brazed, not soldered. <br /> For retrofit applications, where the existing <br /> indoor evaporator coil and/or refrigerant lines <br /> will be used, the following precautions should o� <br /> be taken: o� <br /> • Ensure that the indoor evaporator coil and o� <br /> refrigerant lines are the correct size. o <br /> • Ensure that the refrigerant lines are free of <br /> leaks, acid, and oil. <br /> Important:For more information see publi- <br /> cation numbers SS-APGO06-EN and APP- <br /> APG011-EN. <br /> Section 6. Refrigerant Line Routing <br /> 6.1 Precautions <br /> Important: Take precautions to prevent noise Comply with National, State, and Local Codes when <br /> within the building structure due to vibration isolating line sets from joists, rafters, walls, or other <br /> transmission from the refrigerant lines. structural elements. <br /> For Example: <br /> • When the refrigerant lines have to be fastened to floor joists or other framing in a structure, use isolation type <br /> hangers. <br /> • Isolation hangers should also be used when refrigerant lines are run in stud spaces or enclosed ceilings. <br /> • Where the refrigerant lines run through a wall or sill, they should be insulated and isolated. <br /> • Isolate the lines from all ductwork. <br /> • Minimize the number of 902 turns. <br /> 8 Feet Maximum <br /> / Joist/Rafter <br /> 0 0 <br /> 0 0 Isolator <br /> 0 0 <br /> 0 0 <br /> 0 <br /> 0 0 <br /> 0 0 <br /> 0 0 <br /> O o lul <br /> Line Set <br /> Side View <br /> 8 Feet Maximum <br /> Secure Vapor line from joists using isolators every 8 ft. Secure <br /> Liquid Line directly to Vapor line using tape, wire, or other appro- <br /> priate method every 8 ft. <br /> Isolation From Joist/Rafter <br /> 18-BC108D1-1 B-EN 7 <br />