Burr
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 burrs from the cut cross section
of pipe. (Fig. 3)
• Put the end of the copper pipe to downward direction
as you remove burrs in order to avoid to let burrs drop
in the piping.
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then put them on pipe having completed burr removal.
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4) Flaring work (Fig. 4, 5). Firmly hold copper pipe in the
dimension shown in the table. Select A mm from the table
according to the tool you use.
5) Check
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-
WLRQDQGGRÀDULQJZRUNDJDLQ
3-3. PIPE CONNECTION
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:KHQIDVWHQHGWRRWLJKWÀDUHQXWPD\EUHDNDIWHUDORQJSHULRGDQGFDXVHUHIULJHUDQW
leakage.
• Be sure to wrap insulation around the piping. Direct contact with the bare piping may
result in burns or frostbite.
Indoor unit connection
Connect both liquid and gas pipings to indoor unit.
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refrigeration oil on screw threads. Excessive tightening torque will result in damage on
the screw.
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hand.
• Use tightening torque table above as a guideline for indoor unit side union joint section,
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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 Burred
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
Die
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 block. Be careful not to make mis-wiring. Fix the wire
to the terminal block securely so that no part of its core is appeared, and no external force
is conveyed to the connecting section of the terminal block.
3) Firmly tighten the terminal screws to prevent them from loosening. After tightening, pull
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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.
• Be sure to attach each screw to its correspondent terminal when securing the cord
and/or the wire to the terminal block.
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 be arranged through above ceiling, closet or where the tempera-
ture and humidity are high, wind additional commercially sold insulation to prevent
condensation.
Terminal block
Terminal block
Cord clamp
Cord clamp
Cord clamp
Power supply
cord (K)
Power supply cord (K)
Terminal block
Indoor/outdoor
unit connect-
ing wire (A)
Indoor/outdoor unit
connecting wire (A)
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supply cord on this side.
$OZD\V¿[WKHSRZHUVXSSO\
cord on this side.
Insert the end of the cable
tie in the rectangle hole.
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