10
18-BC92D1-1F-EN
Table 10. Reuse Existing Refrigerant Lines
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For retrofit applications, where the existing indoor evaporator coil
and/or refrigerant lines will be used, the following precautions should
be taken.
• Ensure that the indoor evaporator coil and refrigerant lines are
the correct size.
• Ensure that the refrigerant lines are free of leaks, acid, and oil.
Important: For more information, see publication number SS-
APG006–EN
Table 11. Refrigerant Line Routing Precautions
Important: Comply with National, State, and Local Codes when isolating line sets from joists, rafters, walls, or other structural elements.
Important: For buried linesets, see publication number SS-APG006–EN.
Important: Take precautions to prevent noise within the building structure due to vibration transmission from the refrigerant lines.
For Example:
• When the refrigerant lines must be fastened to floor joists or other framing in a structure, use isolation type hangers.
• Isolation hangers should also be used when refrigerant lines are run in stud spaces or enclosed ceilings.
• Where the refrigerant lines run through a wall or sill, they should be insulated and isolated.
• Isolate the lines from all duct work.
• Minimize the number of 90° turns.
Table 12. Isolation From Joist/Rafter
8 Feet Maxim um
Side View
8 Feet Maxim um
Joist/Rafter
Isolator
Line Set
Secure Vapor Line from joists using isolators every 8 ft. Secure Liquid Line directly to insulated Vapor Line using tape, wire, or other appropriate
method every 8 ft.
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