Section 6. Refrigerant Line Routing - Trane 5TTR3018-060 Installation And Operation Manual

5.4 Refrigerant Line Insulation
Important: The Vapor Line must always be
insulated. DO NOT allow the Liquid Line and
Vapor Line to come in direct (metal to metal)
contact.
5.5 Reuse Existing Refrigerant Lines
! CAUTION
REFRIGERANT!
Failure to inspect or use proper service tools may
result in equipment damage or personal injury.
If using existing refrigerant lines make certain that
all joints are brazed, not soldered.
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.

Section 6. Refrigerant Line Routing

6.1 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.
Important: Take care that piping material, pipe routing, and installation shall include protection from physical
damage in operation and service, and be in compliance with national and local codes and standards, such as
ASHRAE 15, ASHRAE 15.2, IAPMO Uniform Mechanical Code, ICC International Mechanical Code, or CSA B52.
All field joints shall be accessible for inspection prior to being covered or enclosed.
Important: Take care to account for expansion and contraction of long runs of piping.
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.
6
Vapor Line
Liquid Line
Insulation
18-AC127D1-1A-EN