9
Outdoor Unit
Installing The Outdoor Unit
• When installing the outdoor unit, refer to
"Precautions for Selecting a Location"
and the
"Outdoor Unit
Installation Diagram" .
., .... Flaring The Pipe End
,{t 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.
i'I
Refrigerant Piping
C"' =ctly at
[ill
� � Removeburrs.
Flaring
Set exactly at the position shown below.
� N
1o,'�:�d�32I co,;:,':!:"'
Clutch-type I Cl�h-type I Wing-nut type
(R1g1d-type) (Imperial-type)
IIAI 0-0.5mm I 1.0-1.smm I 1.5-2.0mm
Check
The Ila"''' "" '""'"'
i
Th, p
i
p, ,od mos! b
e=
'•
must be flaw-free.
1
flared in a perfect circle.
I� :�n��: ;��
!
di.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.
Piping size
Flare nut
Valve cap
I Service port cap
�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
48.1-59.7N • m
(505-615 kgf • cm)
0. D. 15.9mm
61.8-75.4N • m
(490-610 kgf • cm)
I
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
I
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
2
K
( 0.035 to 0.045kcal/m
2
h
°
C)
Table No. 7
ii:�:::""""'"�'"
R�in
place a cap.
If no flare cap is
�
available, cover
the flare mouth �
�
with tape to keep
�
d
i
rt or water out.
P,:77,l
2) Be sure to insulate both the gas and liquid piping and to provide insulation dimensions as below.
Piping
Minimum
Piping thickness
size
bend radius
O.D.
30 mm or
9.5mm
more
Gas
O.D.
Thickness, 0.7mm
40 mm or
(C1220T-O)
side
12.7mm
more
O.D.
50 mm or
Thickness 0.8mm
15.9mm
more
(C1220T-O)
Liquid
O.D.
30 mm or
Thickness 0.6mm
side
6.4mm
more
(C1220T-O)
Thermal
Thermal
insulation
insulation size thickness
I.D
12-15mm
I.D
14-16mm
Thickness
I.D
min.6.5mm
16-20mm
I.D
8-10mm
---
Table No. 8
• Use separate thermal
insulation pipes for gas and
liquid refrigerant pipes.
Gas pipe Inter-unit wire
I
L
Uqold pip,
\�
Gasle
� .
los,,1100/
q
I��:,:,�:·
Finishing tape Drain hose
{field supply)
