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".
l'..111
FLARING THE PIPE END
Lt_ 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.
IC.
REFRIGERANT PIPING
C<rt e><act'fal
[l]
��Remove burrs.
Flaring
Set exactly at the position shown below-.
� N
Flo,otool
,I
Co°'"olioool
for R41 0A/R32
flare tool
Clutch-type Wing-nut type
Cluteh-type I (Rigid-type) I {Imperial-type)
A
0-0.Smm
1.0-1.Smm 1.5-2.0mm
Check
The fla,e's looe, sorta�
i
The pipe eod m,st _be ""'"'Y
must be flaw-free.
flared in a perfect circle.
,� :��
e
r:�: ;i:'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. 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
O. D. 9.5mm
(333-407 kgf • cm)
(220-280 kgf • cm)
Gas side
I 0. D. 12.7mm
49.5-60.3N • m
48.1-59.7N • m
(505-615 kgf • cm)
O. D. 15.9mm
61.8-75.4N • m
(490-61
O
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
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'K
( 0.035 to 0.045kcal/m
2
h
°
C)
Table No. 7
1!:
�
::: Brn,eto
�
,n
R.�in
place a cap.
If no flare cap is
�
available.cover
the flare mouth
with tape to keep
dlrt oc=to,M�
2) Be sure to insulate both the gas and liquid piping and to provide insulation dimensions as below.
Thermal
• Use separate thermal
Piping
Minimum
Thermal
insulation pipes for gas and
Piping thickness
insulation
size
bend radius
insulation size thickness
liquid refrigerant pipes.
O.D.
30 mm or
I.D
"i
pipe
'T""::::
pip,
9.5mm
more
Thickness, 0.7mm
12-15mm
Gas
O.D.
40 mm or
(C1220T-O)
I.D
\�
side
12.7mm
more
14-16mm
Thickness
O.D.
50 mm or
Thickness 0.8mm
I.D
min.6.5mm
15.9mm
more
(C1220T-O)
16-20mm
Gasre
� .
Liquid
O.D.
30 mm or
Thickness 0.6mm
I.D
1,,,,latioo/
q '"""
p,p,
insulation
side
6.4mm
more
(C1220T-O)
8-10mm
Finishing tape Drain hose
---
(field supply)
Table No. 8
Summary of Contents for FTHT35UV16W
Page 20: ......
