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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.
TORQUE REQUIREMENTS
18~20(180~200kgf.cm)
Outer Diameter of Pipe
(mm)
Tightening Torque
(N•m)
Flare dimension(B)
(mm)
Flare shape
Ø 6.35 (Ø 0.25”)
8.4~8.7 (0.33~0.34”)
90 °
±4
32~39(320~390kgf.cm)
13.2~13.5 (0.52~0.53”)
Ø 9.52 (Ø 0.375”)
45 °±2
B
49~59(490~590kgf.cm)
16.2~16.5 (0.64~0.65”)
Ø 12.7 (Ø 0.5”)
R0.4~0. 8
57~71(570~710kgf.cm)
19.2~19.7 (0.76~0.78”)
Ø 16 (Ø 0.63”)
67~101(670~1010kgf.cm)
23.2~23.7 (0.91~0.93”)
Ø 19 (Ø 0.75”)
DO NOT USE EXCESSIVE TORQUE
Excessive force can break the nut or damage the refrigerant piping. You must not exceed
torque requirements shown in the table above.
Instructions for Connecting Piping to Outdoor Unit
1. Unscrew the cover from the packed valve on
the side of the outdoor unit.
2. Remove protective caps from ends of valves.
6. Loosen the flaring nut slightly, then tighten
again.
7. Repeat Steps 3 to 6 for the remaining pipe.
3. Align flared pipe end with each valve, and
tighten the flare nut as tightly as possible by
hand.
USE SPANNER TO GRIP MAIN
BODY OF VALVE
Torque from tightening the flare nut can snap
off other parts of valve.
4. Using a spanner, grip the body of the valve.
Do not grip the nut that seals the service
valve.
Valve cover
5. While firmly gripping the body of the valve,
use a torque wrench to tighten the flare nut
according to the correct torque values.
Refrigerant piping
Connection
Page 31