En-4
5. INSTALLATION
5.1. Outdoor unit installation
Set the unit on a strong stand such as thing made of concrete blocks to minimize shock and vibration.
Do not set the unit directly on the ground because it will cause trouble.
WARNING
Install the unit where it will not be tilted by more than 5°.
When installing the outdoor unit where it may exposed to strong wind, fasten it securely.
5.2. Connector cover remove
Connector cover removal
●
Remove the tapping screws.
Installing the connector cover
(1) After inserting the four hooks, then push
upward.
(2) Tighten the tapping screws.
5.3. How to connect the wire to the terminals
(1) Use crimp-type terminals with insulating sleeves as shown in the
fi
gure below to connect
to the terminal block.
(2) Securely crimp the crimp-type terminals to the wires using an appropriate tool so that
the wires do not come loose.
(3) Use the speci
fi
ed wires, connect them securely, and fasten them so that there is no
stress placed on the terminals.
(4) Use an appropriate screwdriver to tighten the terminal screws. Do not use a screwdriver
that is too small, otherwise, the screw heads may be damaged and prevent the screws
from being properly tightened.
(5) Do not tighten the terminal screws too much, otherwise, the screws may break.
(6) See the table below for the terminal screw tightening torques.
Tightening torque
M4 screw
1.2 to 1.8 N • m (12 to 18 kgf • cm)
M5 screw
2.0 to 3.0 N • m (20 to 30 kgf • cm)
Strip
10 mm
Crimp-type terminal
Sleeve
Wire
Wire
Screw with special washer
Terminal board
Terminal block
Screw with special washer
Crimp-type terminal
Crimp-type terminal
CAUTION
Match the terminal block numbers and connection cable colors with those of the indoor
unit.
Erroneous wiring may cause burning of the electric parts.
Connect the connection cables
fi
rmly to the terminal block. Imperfect installation may
cause a
fi
re.
Always fasten the outside covering of the connection cable with the cable clamp. (If the
insulator is chafed, electric leakage may occur.)
Securely earth the power cable plug.
Do not use the earth screw for an external connector. Only use for interconnection
between two units.
5.4. Outdoor unit wiring
(1) Remove the outdoor unit connector cover.
(2) Bend the end of the cable as shown in the
fi
gure.
(3) Connect the end of the connection cable fully into the terminal block.
(4) Fasten the sheath with a cable clamp.
(5) Install the connector cover.
Connection cable
Cable clamp
N
L
3
2
1
Cable
clamp
Earth
screw
N
L
3
2
1
1 2 3
Outdoor unit terminal block
Indoor unit terminal block
Connection cable
Earth
screw
Earth
screw
Power supply cable
Connection cable preparation
Keep the earth wire longer than the other wires.
Earth wire
30 mm
Power supply cable or
Transmission cable
35 mm
Connection cable wiring
Run the connection cable to the rear of the outdoor unit within the
A
range of the arrows shown in the
fi
gure.
(The connector cover becomes dif
fi
cult to install.)
A
10 cm
8 cm
Hole
Connection cable
How to
fi
xed connection cable and power supply cable at the cable clamp
After passing the connection cable and power supply cable through the insulation tube,
fasten it with the cable clamp.
Insulation tube
Insulation tube
Cable clamp
Use VW-1, 1.0 mm thick, PVC tube as the insulation tube.
5.5. Connecting the piping
CONNECTION
(1) Install the outdoor unit wall cap (supplied with the optional installation set or pro-
cured at the site) to the wall pipe.
(2) Connect the outdoor unit and indoor unit piping.
(3) After matching the center of the
fl
are surface and tightening the nut hand tight,
tighten the nut to the speci
fi
ed tightening torque with a torque wrench. (Table 1)
FLARING
(1) Cut the connection pipe to the necessary
length with a pipe cutter.
(2) Hold the pipe downward so that cuttings will
not enter the pipe and remove the burrs.
(3) Insert
the
fl
are nut onto the pipe and
fl
are the
pipe with a
fl
aring tool.
Insert the flare nut (always use the flare nut
a t t a c h e d t o t h e i n d o o r a n d o u t d o o r u n i t s
respectively) onto the pipe and perform the
fl
are
processing with a
fl
are tool.
U s e t h e s p e c i a l R 4 1 0 A f l a r e t o o l , o r t h e
conventional (for R22)
fl
are tool.
When using the conventional
fl
are tool, always use
an allowance adjustment gauge and secure the A
dimension shown in table 2.
Connector cover
Tapping screw
Hooks
Tapping screw
Check if [L] is
fl
ared uniformly and
is not cracked or scratched.
Die
A
Pipe
N
L
3
1
3
2
2
1
Power supply
Outdoor unit
side terminal
Indoor unit
side terminal
Power line
EARTH
EARTH
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11/27/2015 3:03:52 PM
