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2-4. FLARE CONNECTION
1) Cut the copper pipe as straight as possible with a pipe cutter. (Fig. 1, 2)
2) Remove all burrs from the cut section of the pipe, ensuring that precautions are
taken to avoid getting metal shavings into the piping. (Fig. 3)
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4) Flaring work (Fig. 4, 5). Firmly hold copper pipe in the dimension shown in the
table. Select A inch (mm) from the table according to the tool you use.
5) Check
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Pipe
diameter
inch
(mm)
Nut
inch
(mm)
A inch (mm)
Tightening torque
Clutch type
tool
for R410A
Clutch type
tool
for R22
Wing nut
type tool
for R22
N•m
ft•lb
(kgf•cm)
ø 1/4
(6.35)
1/4
(17)
0 to 0.02
(0 to 0.5)
0.04 to 0.06
(1.0 to 1.5)
0.06 to 0.08
(1.5 to 2.0)
13.7 to 17.7
10 to 13
(140 to 180)
ø 3/8
3/8
(22)
34.3 to 41.2
25 to 30
(350 to 420)
ø 1/2
(12.7)
1/2
(26)
0.08 to 0.10
(2.0 to 2.5)
WR
36 to 42
(500 to 575)
ø 5/8
(15.88)
5/8
73.5 to 78.4
54 to 58
(750 to 800)
Fig. 1
Fig. 2
Fig. 4
Fig. 5
Fig. 6
2-5. PIPE CONNECTION
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Indoor unit connection
Connect both liquid and gas pipings to indoor unit.
• Apply a thin coat of refrigerant oil (J) on the seat surface of pipe.
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• Use tightening torque table above as a guideline for indoor unit side joints, and tighten using two wrenches. Excessive
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Outdoor unit connection
Connect pipes to stop valve pipe joint of the outdoor unit following the same procedure detailed in Indoor unit connection.
• For tightening, use a torque wrench or spanner.
2-6. INSULATION AND TAPING
1) Cover piping joints with pipe cover.
2) For outdoor unit side, insulate the piping, including valves.
3) Apply piping tape (G) starting from the connection on the outdoor unit.
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condensation.
RIGHT DOWNWARD PIPING
OTHER PIPING
Band (5)
Remove the
cover.
Pipe cover (4)
Band (5)
Wrap the felt tape
(11) tightly around
the pipes and hose
starting near where
the pipes and hose
are routed from the
indoor unit. (The
o v e r l a p w i d t h o f
the felt tape (11)
should not be more
than 1/2 of the tape
width.)
Start wrapping the piping
tape (G) around the pipes
and hose 3/8 in. (10 mm)
inside the indoor unit.
Fasten the end of the
felt tape (11) with a
bandage stopper.
Make sure that the drain hose
is not routed upward.
Felt tape (11)
2-7. PIPE FORMING AND INSTALLATION
Connecting Pipe Installation
• Install the connecting pipes so that the piping can move slightly to the front, back, left, and right.
• Be sure to insulate the connecting pipes and place them near the rear of the indoor unit so that they do not contact the front panel.
• Be careful not to crush the connecting pipes when bending them.
LEFT OR LEFT-REAR PIPING
• Bundle the connecting pipes and drain hose together, and then wrap them in
felt tape (11).
• Route the conduit pipe above and along the drain hose.
• There are conduit pipes that the left or left-rear piping connection cannot be
performed.
Cut and use the lower side panels on the left and right sides of the indoor unit as shown below.
Smooth the cut edges of the side panels so that they will not damage the insulation coating.
Molding
Cut the lower side panels to match the
height of the molding.
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wall with molding
• For left or right piping
Fig. 3
Tilted Uneven Burred
Good
No good
Burr
Copper pipe
Spare reamer
Pipe cutter
Smooth all
around
Even length
all around
Inside is shin-
ing without any
scratches.
Flare nut
Die
Copper pipe
Clutch type
Flaring tool
Wing nut type
Copper
pipe
WARNING
When installing the unit, securely connect the refrigerant
pipes before starting the compressor.
