INSTALLATION OF REFRIGERANT PIPING
8. Apply a small amount of refrigerant oil to the flare connection on the refrigerant pipes.
9. Properly align piping and tighten flare nut using a standard wrench and a torque wrench
as shown in figure below:
10. Carefully tighten flare nuts to correct torque level referring to the following Torque Table:
NOTE: Over tightening may damage flare connections and cause leaks.
11. Apply insulation to refrigerant pipe joints to prevent sweating.
12. Gently and securely lock down bottom of indoor unit to wall mounting bracket.
Pipe Diameter Nut Size
Tightening Torque
inch (mm) inch (mm) ft-lbs N-m
1/4 (6.35) 1/4 (17) 10 to 13 14 to 18
3/8 (9.5) 3/8 (22) 25 to 30 34 to 42
1/2 (12.7) 1/2 (25) 36 to 45 49 to 61
5/8 (15.9) 5/8 (29) 50 to 60 68 to 82
Torque Table
Indoor Unit Piping Taper Nut
Wrench
Torque Wrench
Piping
16
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