R-410A clutch type
Conventional flare tool
Clutch type
Wing nut type
0–0.020 in.
0.04–0.06 in.
0.06–0.08 in.
13
Installation
5. Attach the yoke to the flaring bar, centering the conical part over the end of the pipe that is
extending above the flaring bar.
6. Tighten the yoke securely to flare the end of the pipe.
Yoke
Flaring bar
Copper pipe
Flare nut
7.
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.
Inclined
Damaged
surface
Uneven
thickness
Correct
Cracked
8. 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. [mm])
Connection
torque (ft·lb)
Flare
dimension
(in.)
Flare shape (in.)
1/4 (6.35)
10.3–13.3 ft·lb
0.34–0.36
R.016–.031
45°±2°
90
°±
2
°
3/8 (9.52)
25.1–31.0 ft·lb
0.50–0.52
1/2 (12.70)
36.1–45.0 ft·lb
0.64–0.65
5/8 (15.88)
50.2–60.5 ft·lb
0.76–0.78
