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9
Outdoor Unit
1. Installing the outdoor unit
• When
i
nstall
i
ng the outdoor un
i
t, refer to
"Precautions for Selecting a Location" and the "Outdoor Unit
Installation Diagram".
2. Flaring the pipe end
it,
WARNING ---
Incomplete flaring may result refr
i
gerant gas leakage.
1) Cut the p
i
pe end w
i
th a p
i
pe cutter.
Cut exactly at
right angles. / 1 '-...._ Remove burrs.
t-lanng
Set exactly at the position shown below.
2) Remove burrs w
i
th the cut surface fac
i
ng downward, so
�
Flare tool
Conventional
that the f
i
ll
i
ngs do not enter the p
i
pe.
3) Put the flare nut on the p
i
pe.
4) Flare the p
i
pe.
5) Check that the flar
i
ng has been done correctly.
3. Refrigerant piping
\
for R410A/R32
Clutch-type
A
0-0smm
flare tool
Clutch-type I Wing-nut type
(R1g1d-type) (Imperial-type)
1 0-1 5mm
I
1 5-2 0mm
,--------Check-------�
The flare's inner
surface/i
i
ffi
The pi�e end must be evenly
must be flaw-free.
/ .,j
flared 1n a perfect circle.
i �
�a��
e
n���= :i�:�_h
e
1) To prevent gas leakage, apply refr
i
gerat
i
on o
i
l to the
i
nner surface of the flare.
2) Al
i
gn the centres of both flares and t
i
ghten the flare nuts 3 or 4 turns by hand.
Then t
i
ghten them fully with the tor
q
ue wrenches.
• Use tor
q
ue wrenches when t
i
ghten
i
ng the flare nuts to prevent damage to the flare nuts and escap
i
ng gas.
Piping size
Flare n
u
t
Valve cap
Service port cap
tightening torq
u
e
tighten
i
ng torq
u
e
tightening torq
u
e
Gas s
id
e
O.D.12.7mm
35-43N•m
25-31N•m
(357-439kgl-cm)
(255-316kgfocm)
10.8-14.?N•m
Liq
u
i
d
si
d
e
0. D.6.4mm
15-19N•m
21-25N•m
(110-150kgfocm)
( 153-194kgf-cm)
(214-255kgf•cm)
Cautions on Pipe Handling
, , 1 , , ,
�
all
I
1 , I 1 1
Be sure to
1) Protect the open end of the pipe aga
i
nst dust and mo
i
sture.
! ! '
place a cap.
Rain
2) All p
i
pe bends should be as gentle as poss
i
ble. Use a p
i
pe bender for
�1'
noflace cap 1s
bending.
o.
:;:�
1
���
e
���i:; �
with tape to keep
Selection of Copper and Heat Insulation materials
dlrtorwate,ou1.
When using commerc
i
al copper p
i
pes and f
i
tt
i
ngs, observe the follow
i
ng:
1) Insulation mater
i
al: Polyethylene foam
Heat transfer rate : 0.041 to 0.052W/m
2
K ( 0.035 to 0.045kcal/m
2
h
°
C)
2) Be sure to insulate both the gas and l
i
qu
i
d pip
i
ng and to prov
i
de insulat
i
on d
i
mens
i
ons as below.
Piping Minimum
Piping
Thermal
Thermal
bend
insulation
insulation
size
radius
thickness
size
thickness
Gas
O.D.
40mm 0.7mm or more
I.D.
6.5mm or above
side 12.7mm or more
(C1220T-0) 14-16mm (pipe length
3.0m or less)
Liquid
O.D.
30mm 0.6mm or more
I.D.
10mm (pipe
side
6.4mm or more
(C1220T-O) 8-10mm length over 3.0m)
• Use separate thermal
i
nsulat
i
on p
i
pes for gas and l
i
qu
i
d refr
i
gerant p
i
pes.
Gas pipe Inter-
u
nit wire
.. .-. !-
·.
:_.
L
..
-�
iquid
p
i
pe
@�/;
•,
·--t<y-
Q(.
}.(Qt.
r
. ..
.. ';(
Gas pipe·
.
·.
.
.
' \
i
ns
u
lat
i
on /
q
L
iqu
id pipe
/
'\ ins
u
lation
F
i
n
i
sh
i
ng tape Drain hose
(field s
u
pply)