Split-type room air conditioner / Installation Manual
41 / 120 EN
7.3 Instructions for connecting piping to indoor unit
1. Align the center of the two pipes that you will connect. See Fig. 7.7.
Indoor unit tubing
Fig. 7.7
Flare nut
Pipe
2. Tighten the flare nut as tightly as possible by hand.
3. Using a spanner, grip the nut on the unit tubing.
4. While firmly gripping the nut on the unit tubing, use a torque wrench to tighten the flare nut
according to the torque values in the Torque Requirements table below. Loosen the flaring nut
slightly, then tighten again.
Fig. 7.8
Torque requirements
Outer diameter of pipe (mm)
Tightening torque (N•cm)
Add. tightening torque (N•m)
Ø 6.35 (Ø 0.25”)
1,500 (11lb • ft)
1,600 (11.8lb • ft)
Ø 9.52 (Ø 0.375”)
2,500 (18.4lb • ft)
2,600 (19.18lb • ft)
Ø 12.7 ( Ø 0.5”)
3,500 (25.8lb • ft)
3,600 (26.55lb • ft)
Ø 16 ( Ø 0.63”)
4,500 (33.19lb • ft)
4,700 (34.67lb • ft)
7
Refrigerant piping connection
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