MINIMUM BEND RADIUS
When bending connective refrigerant piping,
the minimum bending radius is 10cm.
≥10cm
(4")
Radius
Instructions for Connecting Piping to Indoor Unit
Align the center of the two pipes
that you will connect.
Tighten the flare nut as tightly as possible by hand.
Using a spanner, grip the nut on the unit tubing.
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.
Refer to Torque Requirement to connect pipes
2
TORQUE REQUIREMENTS
Outer Diameter of Pipe(mm) Tightening Torque(N•m) Flare dimension(B)(mm)
Flare shape
Ø 6.35 (Ø 1/4”) 8.4~8.7 (0.33~0.34”)
13.2~13.5 (0.52~0.53”)
16.2~16.5 (0.64~0.65”)
19.2~19.7 (0.76~0.78”)
23.2~23.7 (0.91~0.93”)
18~20(180~200kgf.cm)
32~39(320~390kgf.cm)
49~59(490~590kgf.cm)
57~71(570~710kgf.cm)
67~101(670~1010kgf.cm)
Ø 9.52 (Ø 3/8”)
Ø 12.7 (Ø 1/2”)
Ø 16 ( Ø 5/8”)
Ø 3/4”)
Ø 19 (
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.
WHEN CONNECTING REFRIGERANT PIPES, BE CAREFUL NOT TO USE
EXCESSIVE TORQUE OR TO DEFORM THE PIPING IN ANY WAY. YOU SHOULD
FIRST CONNECT THE LOW-PRESSURE PIPE, THEN THE HIGH-PRESSURE PIPE.
CAUTION
Indoor unit tubing Flare nut Pipe
Torque
wrench
Indoor unit tubing
Spanner (fixed)
Connection pipe
Flare nut
Step 1： Step 2：
27
●
●
●
●
R0.4~0.8
45
°
2
90
°
4
B
+
_
+
_
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