Multi-Zone Outdoor Condenser Installation Manual

DURASTAR.COM20
Outer Diameter of
Pipe Inches (mm)
Tightening Torque Nm
(lb-ft)
Flare Dimension "B"
Inches (mm)
Flare Shape
 0.25" (6.35mm) 18~20 (13.3~14.8) 0.33~0.34 (8.4~8.7)
R 0.4~0.8
45
°
±
2
90
°
±
4
B
 0.375" (9.52mm) 32~39 (23.6~28.8) 0.52~0.53 (13.2~13.5)
 0.5" (12.7mm) 49~59 (36.1~43.5) 0.64~0.65 (16.2~16.5)
 0.63" (16mm) 57~71 (42~52.4) 0.76~0.78 (19.2~19.7)
 0.75" (19mm) 67~101 (49.4~74.5) 0.91~0.93 (23.2~23.7)
CONNECTING PIPING TO OUTDOOR UNIT
1. Remove the valve cover on the side of the outdoor unit.
2. Remove the protective caps from the ends of the valves.
3. Align flared pipe end with each valve and tighten the flare nut as tightly as possible by hand.
4. Using a spanner, grip the body of the valve. Do not grip the nut that seals the service valve.
5. While firmly gripping the body of the valve, use a torque wrench to tighten the flare nut
according to the correct torque values in the table above.
6. Loosen the flare nut slightly, then tighten again.
7. Repeat steps 3-6 for the remaining pipe.
Valve cover
WARNING
Do not use excessive torque. Excessive force can break the nut or damage the
refrigerant piping. You must not exceed the torque requirements shown in the table
above.