14
VRF-SVX26D-EN
Installation
4. Tighten the yoke securely to flare the end of the pipe.
Yoke
Flaring bar
Copper pipe
Flare nut
5. Remove the pipe.The end of the pipe that you flared should look like the end of a trumpet. See
examples of correctly and incorrectly flared pipes.
6. Align the pipes and tighten the flare nuts manually and then with a spanner torque wrench,
applying the torque according to pipe dimensions:
Outer diameter
(in.)
Connection
torque (ft·lb)
Flare
dimension
(in.)
Flare shape (in.)
1/4
10.3–13.3 ft·lb
0.34–0.36
3/8
25.1–31.0 ft·lb
0.50–0.52
1/2
36.1–45.0 ft·lb
0.64–0.65
5/8
50.2–60.5 ft·lb
0.76–0.78
Leak Testing Pipe Connections
Inclined
Damaged
surface
Uneven
thickness
Correct
Cracked
R.016–.031
45°±2°
90°±2°
WARNING
Confined Space Hazards!
Do not work in confined spaces where refrigerant or other hazardous, toxic or flammable gas
may be leaking. Refrigerant or other gases could displace available oxygen to breathe, causing
possible asphyxiation or other serious health risks. Some gases may be flammable and or
explosive. If a leak in such spaces is detected, evacuate the area immediately and contact the
proper rescue or response authority. Failure to take appropriate precautions or to react properly
to such potential hazards could result in death or serious injury.
