Trane MCX512 G1 Installation Manual page 13

Figure 6.
Connection
9.
Figure 7.
10. Tighten the flare nut to the specified tightening torque with torque wrench and adjustable
Table 1.
Flare Nut/Piping
Size
6.35 mm(1/4") dia.
9.53 mm(3/8") dia.
12.7 mm(1/2") dia.
15.88 mm(5/8") dia.
Figure 8.
Indoor unit
pipe
11. Repeat the process above for the remaining line.
MS-SVN15B-EN
Apply r efrigerant
lubricant her e
For proper connection, align the union tube and flare tube straight with each other, then
screw in the flare nut lightly at first to obtain a smooth match (Figure 17).
Union Flar e nut
wrench (Figure 18).
Flare Nut Tightening Torque
Tightening
Kgf, -cm
150
350
500
600
Wrench
(adjustable)
To rque
wrench
Connection pipe
Flar e nut
Connection of Refrigerant Tubing
Torque
lbf- in
200 130 170
400 300 340
550 430 470
650 520 570
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