%
urr
Copper pipe
Spare reamer
Pipe cutter
3-2. FLARING WORK
1) Cut the copper pipe correctly with pipe cutter
(Fig
1, 2)
2) Completely remove all
E
urrs from the cut cross section
of pipe
(Fig
3)
Put the end of the copper pipe to downward direction
as you remove
E
urrs in order to avoid to let
E
urrs drop
in the piping
3) Remove
À
are nuts attached to indoor and outdoor units,
then put them on pipe having completed
E
urr removal
(Not possi
E
le to put them on after
À
aring work
)
4) Flaring work (Fig
4, 5)
Firmly hold copper pipe in the
dimension shown in the ta
E
le
Select A mm from the ta
E
le
according to the tool you use
5) Check
Compare the
À
ared work with Fig
6
If
À
are is noted to
E
e defective, cut off the
À
ared sec
tion and do
À
aring work again
3-3. PIPE CONNECTION
Fasten
À
are nut with a torque wrench as speci
¿
ed in the ta
E
le
When fastened too tight,
À
are nut may
E
reak after a long period and cause refrigerant
leakage
%
e sure to wrap insulation around the piping
'
irect contact with the
E
are piping may
result in
E
urns or frost
E
ite
Indoor unit connection
Connect
E
oth liquid and gas pipings to indoor unit
Apply a thin coat of refrigeration oil (J) on the
À
ared ends of the pipes
'
o not apply
refrigeration oil on screw threads
Excessive tightening torque will result in damage on
the screw
For
connection,
¿
rst align the center, then tighten the
¿
rst 3 to 4 turns of
À
are nut
Use tightening torque ta
E
le a
E
ove as a guideline for indoor unit side union joint section,
and tighten using two wrenches
Excessive tightening damages the
À
are section
Pipe diameter
(mm)
Nut
(mm)
A (mm)
Tightening torque
Clutch
type tool
for R32,
R410A
Clutch type
tool for
R22
Wing nut
type tool for
R22
N
m
kgf
cm
ø6
35 (1/4
´
)
17
0 to 0
5
1
0 to 1
5
1
5 to 2
0
13
7 to
17
7
140 to 180
ø9
52 (3/8
´
)
22
34
3 to
41
2
350 to 420
ø12
7 (1/2
´
)
26
2
0 to 2
5
49
0 to
56
4
500 to 575
ø15
88 (5/8
´
)
29
73
5 to
78
4
750 to 800
Copper
pipe
Good
Tilted Uneven
%
urred
No good
Fig
1
Fig
2
Clutch type
Flaring tool
Fig
4
Fig
3
Smooth all
around
Even length
all around
Inside is shin
ing without any
scratches
Flare nut
'
ie
Fig
5
Fig
6
3. OUTDOOR UNIT INSTALLATION
Copper pipe
Wing nut type
WARNING
When installing the unit, securely connect the refrigerant
pipes before starting the compressor.
3-1. CONNECTING WIRES FOR OUTDOOR UNIT
1) Open the service panel
2) Loosen terminal screw, and connect indoor/outdoor unit connecting wire (A) from the
indoor unit correctly on the terminal
E
lock
%
e careful not to make mis
wiring
Fix the wire
to the terminal
E
lock securely so that no part of its core is appeared, and no external
force is conveyed to the connecting section of the terminal
E
lock
3) Firmly tighten the terminal screws to prevent them from loosening
After tightening, pull
the wires lightly to con
¿
rm that they do not move
4) Connect power supply cord (K)
5) Fix indoor/outdoor unit connecting wire (A) and power supply cord (K) with the cord clamp
6) Close the service panel securely
Make earth wire a little longer than others
(More than 100 mm)
For future servicing, give extra length to the connecting wires
%
e sure to attach each screw to its correspondent terminal when securing the cord
and/or the wire to the terminal
E
lock
35 mm
15 mm
Lead wire
Power supply cord (K)
Outdoor unit connection
Connect pipes to stop valve pipe joint of the outdoor unit in the
same manner applied for indoor unit
For tightening, use a torque wrench or spanner and use the
same tightening torque applied for indoor unit
3-4. INSULATION AND TAPING
1) Cover piping joints with pipe cover
2) For outdoor unit side, surely insulate every piping including valves
3) Using piping tape (G), apply taping starting from the entry of outdoor unit
Stop the end of piping tape (G) with tape (with adhesive agent attached)
When piping have to
E
e arranged through a
E
ove ceiling, closet or where the tempera
ture and humidity are high, wind additional commercially sold insulation to prevent
condensation
Terminal
E
lock
Terminal
E
lock
Cord clamp
Cord clamp
Power supply
cord (K)
Power supply cord (K)
Terminal
E
lock
Indoor/outdoor
unit connect
ing wire (A)
Indoor/outdoor
unit connecting
wire (A)
Always
¿
x the power
supply cord on this side
Insert the end of the ca
E
le
tie in the rectangle hole
<LN25, 35>
<LN50>
<LN50
+
Z, 60>
WARNING
To avoid risk of
¿
re,
À
are connection should be installed outdoors.
Reusable mechanical connectors and
À
ared
M
oints are not allowed indoors.
When connecting the refrigerant piping by brazing, rather than using
À
are con-
nections, complete all brazing prior to connecting indoor unit to outdoor unit.
