INSTALLATION OF REFRIGERANT PIPING
3. Apply a small amount of refrigerant oil to the flare connection on the refrigerant pipe.
4. Properly align piping and tighten flare nut using a standard wrench and a torque
wrench as shown in the indoor piping section.
5. Carefully tighten flare nuts to correct torque level referring to the following Torque Table:
NOTE: Over tightening may damage flare connections and cause leaks.
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
18
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