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22 Series Multi-Zone
Refrigerant Piping at the Indoor Units
Reference the Indoor Unit Installation Guide
Refrigerant Piping at the Outdoor Unit
Tighten the flare nut of the connection pipe at the outdoor unit valve connector. Follow the flare nut
guidelines in this manual.
Pipe Diameter in. (mm)
1/4" (6.35)
3/8" (9.52)
1/2" (12.7)
5/8" (15.9)
Torque Reference Table
Tube Thickness in. (mm)
≥ 0.03 (0.8)
≥ 0.03 (0.8)
≥ 0.03 (0.8)
≥ 0.04 (1.0)
16
Tightening Torque
11.25 - 14.75 lb•ft (15 ~ 20 N•m)
22.25 - 29.50 lb•ft (30 ~ 40 N•m)
33.25 - 40.50 lb•ft (45 ~ 55 N•m)
44.25 - 47.75 lb•ft (60 ~ 65 N•m)
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