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1-6. DRAIN PIPING FOR OUTDOOR UNIT
Please perform the drain piping work only when draining from one place.
1) Provide drain piping before indoor and outdoor piping connection.
2) Connect the soft PVC hose (L) I.D.15 mm as shown in the illustration.
3) Make sure to provide drain piping with a downhill grade for easy drain flow.
Note:
Install the unit horizontally.
Do not use the drain socket (1) in the cold regions. Drain may freeze and it makes
the fan stop.
The outdoor unit produces condensate during the heating operation. Select the instal-
lation place to ensure to prevent the outdoor unit and/or the grounds from being wet
by drain water or damaged by frozen drain water.
2. OUTDOOR UNIT INSTALLATION
2-1. CONNECTING WIRES FOR OUTDOOR UNIT
1) Remove the service panel.
2) Loosen terminal screw, and connect indoor/outdoor unit connecting wire
(B) 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 the wires lightly to confirm that they do not move.
4) Perform 2) and 3) for each indoor unit.
5) Connect power supply cord (A).
6) Fix indoor/outdoor unit connecting wire (B) and power supply cord (A)
with the cable clamps.
7) Close the service panel securely. Make sure that 3-2. PIPE CONNEC-
TION is completed.
• After making connections between both power supply cord (A) and indoor/
outdoor unit connecting wire (B), be sure to fix both cable and wire with
cable clamps.
Indoor/outdoor unit connecting wire
N
L
N
L
UNIT
3. FLARING WORK AND PIPE CONNECTION
3-1. 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)
• Aim the copper pipe downward while removing burrs to prevent burrs
from dropping in the pipe.
3) Remove flare nuts attached to indoor and outdoor units, then put them
on pipe having completed burr removal. (Not possible to put them on
after flaring work.)
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 selected.
5) Check
• Compare the flared work with Fig. 6.
• If flare is noted to be defective, cut off the flared section and do flaring
work again.
Pipe diameter
Nut
Clutch
(mm)
(mm)
type tool
for R410A
ø6.35 (1/4")
17
ø9.52 (3/8")
22
0 to 0.5
ø12.7 (1/2")
26
ø15.88 (5/8")
29
En-3
<OUTDOOR UNIT>
Terminal block
N
L
N
L
UNIT
<INDOOR UNIT>
A (mm)
Tightening torque
Clutch
Wing nut
type tool
type tool
N•m
for R22
for R22
13.7 to 17.7 140 to 180
1.5 to 2.0
34.3 to 41.2 350 to 420
1.0 to 1.5
49.0 to 56.4 500 to 575
2.0 to 2.5
73.5 to 78.4 750 to 800
(1) Drain socket
Terminal block for
power supply
15 mm
35 mm
Lead wire
POWER SUPPLY
~/N 230 V 50 Hz
Copper pipe
Burr
Spare reamer
kgf•cm
Die
Flare nut
(L) Soft PVC hose
Terminal block for power supply
Service panel
• Be sure to attach each screw to its
correspondent terminal when securing
the cord and/or the wire to the terminal
block.
• Make earth wire a little longer than oth-
ers. (More than 35 mm)
• For future servicing, give extra length
to the connecting wires.
No good
Good
Copper
pipe
Tilted Uneven Burred
Fig. 1
Flaring tool
Pipe cutter
Clutch type
Wing nut type
Fig. 3
Smooth all
around
Copper pipe
Fig. 5
Fig. 2
Fig. 4
Inside is shin-
ing without any
scratches.
Even length
all around
Fig. 6
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