Refrigerant Lines

Detail ID 5.0103.1
Topic
Forced Air
Subtopic
Refrigerant Loop
Desired Outcome

Leak free, safe, efficient, effective, and compliant refrigerant line installation

SF Single Family Site-Built Housing
MH Manufactured Housing
MF Multifamily Housing

Specifications

  • SF
  • MH
  • MF
Specification Objective

Select only manufacturer and code approved (e.g., IRC, IMC) refrigerant lines, fittings, etc.

Choose safe and compliant materials

  • SF
  • MH
  • MF
Specification Objective

Size refrigerant lines in accordance with manufacturer specifications for the installed equipment

Piping moves appropriate volume of refrigerant without increasing compressor load

  • SF
  • MH
  • MF
Specification Objective

Install refrigerant lines without kinks, crimps, or excessive bends

Route lines in a manner that protects it from damage by workers and occupants

Join lines using manufacturer-approved method(s)

Install proper filter dryer(s) on all systems

Install P-traps on suction line risers that are greater than 10' in height

Use manufacturer specifications to determine appropriate lengths and elevations of refrigerant lines between condensing units and indoor coils

Durable, safe piping that moves appropriate volume of refrigerant and protects compressor functionality

  • SF
  • MH
  • MF
Specification Objective

Insulate all suction lines to a minimum of R-4 with an insulation that is a class II or better vapor retarder

Insulate all high pressure lines that pass through spaces where condensation may occur to a minimum of R-4 with an insulation that is a class II or better vapor retarder

Seal all seams, joints, etc. of insulation using compatible material (e.g., tape)

Install UV-resistant insulation on exterior lines or protected insulation from UV degradation

Prevent excessive heat gain, condensation and UV degradation

  • SF
  • MH
  • MF
Specification Objective

Secure and support refrigerant lines according to applicable code and in a manner that protects the line from damage by workers or occupants

Prevent excessive line movement

  • SF
  • MH
  • MF
Specification Objective

If refrigerant lines are installed where they may be contacted by vehicles, people, tree limbs, etc., install a rigid sleeve or pipe duct over them that provides adequate impact protection

Lines protected from impact damage

  • SF
  • MH
  • MF
Specification Objective

Install locking refrigerant caps on all refrigerant access ports

Protect occupants and the environment from unintentional refrigerant discharge or theft

View Sub-Topic:
Refrigerant Loop
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Refrigerant Charge