Trane Variable Refrigerant Flow System Mini Outdoor Unit Series Manual de Instalação descarregar pdf (Página 20)

20 VRF-SVN33A-EN

Refrigerant Piping

3. Attach the yoke to the flaring bar, centering the conical part over the end of the pipe that is

extending above the flaring bar.

4. Tighten the yoke securely to flare the end of the pipe.

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. (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

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

Yoke

Flaring bar

Copper pipe

Flare nut

Inclined

Damaged

surface

Uneven

thickness

Correct

Cracked

R.016–.031

45°±2°

90°±2°

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Trane Variable Refrigerant Flow System Mini Outdoor Unit Series Manual de Instalação Página 20