Installation Guide

PIPING INSTALLATION

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

Piping Connections to Outdoor Unit (con’t)