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3. OUTDOOR UNIT INSTALLATION
3-1. CONNECTING WIRES FOR OUTDOOR UNIT
1) Remove the service panel.
2) Remove the conduit cover.
3) Attach the conduit connector to conduit plate with lock nut then secure it against unit with
screws.
4) Connect ground wires of indoor/outdoor unit connecting wire (A) and power supply cord (K)
to the TB support.
5) Loosen the terminal screw, and attach indoor/outdoor unit connecting wire (A) from the indoor
unit correctly on the terminal block. Attach the wire to the terminal block securely so that its
core cannot be seen, and no external force affects the connecting section of the terminal
block.
6) Firmly tighten the terminal screws. After tightening, verify that the wires are tightly fastened.
7) Connect power supply cord (K).
8) Install the conduit cover.
9) Install the service panel securely.
<HE09/12/15>
Service panel
Lock nut
Conduit cover
<HE18>
Service panel
3-2. FLARE CONNECTION
1) Cut the copper pipe as straight as possible with a pipe cutter. (Fig. 1, 2)
2) Remove all burrs from the cut section of the pipe, ensuring that precautions are taken to
avoid getting metal shavings into the piping. (Fig. 3)
3) Remove flare nuts attached to indoor and outdoor units, then put them on pipe.
4) Flaring work (Fig. 4, 5). Firmly hold copper pipe in the dimension shown in the table. Select A
inch (mm) from the table according to the tool you use.
5) Check
• Compare the flared work with Fig. 6.
• If flare is defective, cut off the section and repeat procedure.
B
Pipe diameter
Clutch
inch
inch (mm)
type tool
(mm)
for R410A
21/32
ø 1/4 (6.35)
(17)
7/8
ø 3/8 (9.52)
(22)
0 to 0.02
(0 to 0.5)
1-1/32
ø 1/2 (12.7)
(26)
1-5/32
ø 5/8 (15.88)
(29)
Conduit plate
Connector
Lock nut
Conduit cover
A inch (mm)
Tightening torque
Clutch
Wing nut
ft-lb
type tool
type tool
(kgf•cm)
for R22
for R22
10 to 13
0.06 to
(140 to 180)
0.08
(1.5 to
25 to 30
0.04 to
2.0)
(350 to 420)
0.06
(1.0 to
36 to 42
0.08 to
1.5)
(500 to 575)
0.10
(2.0 to
54 to 58
2.5)
(750 to 800)
1-3/8 in.
(35 mm)
Lead wire
Terminal block
Power supply cord (K)
TB support
Conduit cover
Connector
Terminal block
Grounding
TB support
terminal
N•m
Flaring tool
13.7 to 17.7
34.3 to 41.2
Clutch type
49.0 to 56.4
Smooth all around
73.5 to 78.4
Even length
all around
19/32 in.
(15 mm)
Power supply cord (K)
• Make earth wire a little longer than oth-
ers. (More than 2-3/8 in. [60 mm])
• For future servicing, leave some slack in
the connecting wires.
• Be sure to attach each screw to its cor-
respondent terminal when securing the
cord and/or the wire to the terminal block.
Grounding
terminal
Indoor/outdoor unit
connecting wire (A)
Power supply cord (K)
Indoor/outdoor unit
connecting wire (A)
to conduit cover
Good
90°
Copper
pipe
Fig. 1
Copper pipe
Burr
Spare reamer
Pipe cutter
Die
Flare nut
Wing nut type
Fig. 4
Inside is shin-
ing without any
scratches.
Fig. 6
L1 L2
No good
Tilted
Uneven Burred
Fig. 2
Fig. 3
Copper pipe
B
Fig. 5
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