9
Outoor Unit
Installing The Outdoor Unit
• When installing the outdoor unit, refer to
"Precautions for Selecting a Location"
and the
"Outdoor Unit
Installation Diagram".
WJII
Flaring The Pipe End
� WARNING
Incomplete flaring may result refrigerant gas leakage.
1) Cut the pipe end with a pipe cutter.
2) Remove burrs with the cut surface facing downward, so that the fillings
do not enter the pipe.
3) Put the flare nut on the pipe.
4) Flare the pipe.
5) Check that the flaring has been done correctly.
ICII
Refrigerant Piping
c"' exacto at
[ill
�"-Remove burrs.
Flaring
Set exactly at the position shown below.
�N.,;�:;d,:;'�,,I eo;:,"!,",�''
Cl tch-
Clutch-type Wing-nut type
u
type I (Rigid-type) I {Imperial-type)
IIAI
o-o.smm
I 1.0-1.Smm I 1.5-2.0mm
Check
Tha fla,e's laae,
sorn,ca
I
The pq,e
eod
most."
e-,ecty
must be flaw-free.
flared in a per1ect circle.
i� �a�:n:: ii���
t
-
he
1) To prevent gas leakage, apply refrigeration oil to the inner surface of the flare.
2) Align the centres of both flares and tighten the flare nuts 3 or 4 turns by hand. Then tighten them fully with the torque
wrenches.
• Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and escaping gas.
Flare nut
Valve cap
Service port cap
Piping size
ightening torque tightening torque tightening torque
32.7-39.9N • m
21.6-27.4N • m
0. D. 9.5mm
(333-407 kgf • cm)
(220-280 kgf • cm)
Gas side
0. D. 12.7mm
49.5-60.3N • m
(505-615 kgf • cm)
48.1-59.7N • m
0. D. 15.9mm
61.8-75.4N • m
( 490-610 kgf • cm)
10.8-14.7N • m
(110-150 kgf • cm)
(630-770 kgf • cm)
14.2-17.2N • m
21.6-27.4N • m
Liquid side
0. D. 6.4mm
(144-175 kgf • cm)
(220-280 kgf • cm)
Cautions on Pipe Handling
1) Protect the open end of the pipe against dust and moisture.
2) All pipe bends should be as gentle as possible. Use a pipe bender for
bending.
Selection of Copper and Heat Insulation materials
When using commercial copper pipes and fittings, observe the following:
1) Insulation material : Polyethylene foam or equivalent.
Heat transfer rate - Co-efficient : 0.041 to 0.052W/m'K
( 0.035 to 0.045kcal/m'h
°
C)
Table No. 7
ii!!
ii
Be sureto
�
an
! !
place a cap.
Ral�
r i
aofla,e�p ls
vailabla, cover
heflaremouth
�
with tape to keep
irt or water out.
2) Be sure to insulate both the gas and liquid piping and to provide insulation dimensions as below.
Gas
side
Liquid
side
Piping
Minimum
size
bend radius
Piping thickness
Thermal
insulation size
O.D.
30 mm or
I.D
9.5mm
more
12-15mm
>--------l--------< Thickness, 0. 7mm f--------<
12
0
7
�m
40 :
or::'e
or
(C1220T-O)
14_\-�mm
O.D.
50 mm or
Thickness 0.8mm
I.D
15.9mm
more
(C1220T-O)
16-20mm
O.D.
30 mm or
Thickness 0.6mm
I.D
6.4mm
more
(C1220T-O)
8-10mm
Thermal
insulation
thickness
Thickness
min.6.5mm
Table No. 8
• Use separate thermal
insulation pipes for gas and
liquid refrigerant pipes.
Gas pipe Inter-unit wire
I
L
Uqold pipe
(o�d)
r
�
Gas pipe
. . .
insulation /
0
L1qu1d pipe
/
\ insulation
Finishing tape Drain hose
(field supply)
