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20 Outdoor Unit
Installation
Preparation of Piping
1) Cut the pipes and the cable.
n Use the accessory piping kit or the pipes purchased lo-
cally.
n Measure the distance between the indoor and the out-
door unit.
n Cut the pipes a little longer than measured distance.
2) Burrs removal
n Completely remove all burrs from the cut cross section
of pipe/tube.
n Put the end of the copper tube/pipe to downward direc-
tion as you remove burrs in order to avoid to let burrs
drop in the tubing.
3) Flaring work
n Carry out flaring work using flaring tool as shown below.
n For below models, carry out flaring work using flaring
tool as shown below.
Applicable Indoor unit models:
ARNU093TN★2, ARNU123TN★2, ARNU153TN★2,
ARNU183TM★2, ARNU243TM★2, ARNU153BG★2,
ARNU183BG★2, ARNU243BG★2
n
Firmly hold copper tube in a bar (or die) as indicated di-
mension in the table above.
4) Check
n Compare the flared work with figure below.
n If flare is noted to be defective, cut off the flared section
and do flaring work again.
Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure.
Copper
tube
90°
Slanted Uneven Rough
Pipe
Reamer
Point down
Bar
Copper pipe
"A"
Inclined
Inside is shining without scratches.
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
<Wing nut type>
<Clutch type>
Pipe [inch] “A” [inch(mm)]
Gas Liquid Gas Liquid
5/8 3/8
0.03~0.04 0.02~0.03
(0.8~1.0) (0.5~0.8)
Pipe diameter
Inch (mm)
A inch (mm)
Wing nut type Clutch type
Ø1/4 (Ø6.35)
0.04~0.07 (1.1~1.8) 0~0.02 (0~0.5)
Ø3/8 (Ø9.52)
Ø1/2 (Ø12.7)
Ø5/8 (Ø15.88)
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