Daikin F, Operation Manual, Page: 30 / 33

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
L'.t
WARNING ---
Incomplete flaring may result refrigerant gas leakage.
CUI exactly at
rrj1T
right angles.
/IJ+ll':::,
Remove burrs.
Flaring
1 ) Cut the pipe end with a pipe cutter.
Set
e
xactly at th
e
poeition shown below.
1
Flare tool Conventional
2) Remove burrs with the cut surface facing downward, so that the fillings
do not enter the pipe.
�
\ fer R410A/R32
Cluldl-type
flare tool
Cluldl-type I Wing-nut type
(Rigid-type) (Imperial-type)
3) Put the flare nut on the pipe.
4) Flare the pipe.
5) Check that the flaring has been done correctly.
Refrigerant Piping
A 0-0.5mm 1.0-1.5mm I 1.5-2.0mm
�-----Check-----�
•
,
� The Pi>& end must be """'1iy
The flar6s inner surrace 1
'- flar
e
d· rfect • I
must be flaw-free. /
'\
m a pe c1rc e.
1
� �aS:n:: :t��
e
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. T hen 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 Service port cap
tightening torque tightening torque tightening torque
0. D. 9.5mm
32.7-39.9N • m 21.6-27.4N • m
(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
10.8-14.?N • m
0. D. 15.9mm
61.8-75.4N • m
(490-610 kgf• cm)
(110-150 kgf • cm)
(630-770 kgf • cm)
Liquid side
0. D. 6.4mm
14.2-17.2N • m
21.6-27.4N • m
(144-175 kgf • cm)
(220-280 kgf • cm)
Cautions on Pipe Handling
Table No. 7
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
'II"' �I
'!l�!
''
i
:::::,.
Rain
H oo flare cap Is
available, CXMN'
o. the flaremouth
with tape 10 keep
dlrtor water out �
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)
2) Be sure to insulate both the gas and liquid piping and to provide insulation dimensions as below.
Piping Minimum
size bend radius
O.D. 30 mm or
9.5mm more
Gas O.D.
40 mm or
side
12.7mm
more
O.D.
50 mm or
15.9mm
more
Liquid
O.D. 30 mm or
side
6.4mm more
Piping thickness
ThicKness 0.6mm
(C1220T-O)
Thickness 0.6mm
(C1220T-O)
Thickness 0.8mm
(C1220T-O)
Thickness 0.6mm
(C1220T-O)
Thermal
insulation size
I.D
12-15mm
I.D
14-16mm
I.D
16-20mm
I.D
8-10mm
Thermal
insulation
thickness
Thickness
min.6.5mm
Table No.a
• Use separate thermal
insulation pipes for gas and
liquid refrigerant pipes.