Download INSTALLATION MANUAL

5.4. HOW TO CONNECT THE WIRE TO THE TERMINALS
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.
(1) Use crimp-type terminals with insulating sleeves as shown in the figure 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 specified 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
5.2. Connector cover remove
Connector cover removal
● Remove the tapping screws.
Connector cover
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)
Installing the connector cover
Strip
10 mm
(1) After inserting the four hooks, then push
upward.
(2) Tighten the tapping screws.
Tapping screw
Hooks
Crimp-type terminal
Sleeve
Tapping screw
Screw with special washer
5.3. Outdoor unit wiring
(1)
(2)
(3)
(4)
(5)
Wire
Crimp-type terminal
Remove the outdoor unit connector cover.
Bend the end of the cable as shown in the figure.
Connect the end of the connection cable fully into the terminal block.
Fasten the sheath with a cable clamp.
Install the connector cover.
Terminal board
Terminal block
Screw with special washer
Crimp-type terminal
Cable clamp
Connection cable
Wire
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.
35 mm
30 mm
30 mm
Earth
screw
Earth
screw
35 mm
Connect the connection cables firmly to the terminal block. Imperfect installation may
cause a fire.
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.
5.5. Connecting the piping
CONNECTION
Cable clamp
Sheath
Indoor unit terminal block
1
Earth screw
2
3
Outdoor unit terminal block
4
Connection cable
1
2
3
L
N
Earth screw
Connection cable wiring
Run the connection cable to the rear of the outdoor unit within the A range of the arrows shown in the figure.
(The connector cover becomes difficult to install.)
Connection cable
Hole
8 cm
A 10 cm
(1) Install the outdoor unit wall cap (supplied with the optional installation set or procured at the site) to the wall pipe.
(2) Connect the outdoor unit and indoor unit piping.
(3) After matching the center of the flare surface
Check if [L] is flared uniformly and
and tightening the nut hand tight, tighten the
is not cracked or scratched.
nut to the specified 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 flare nut onto the pipe and flare the
pipe with a flaring tool.
Die
Insert the flare nut (always use the flare nut attached
to the indoor and outdoor units respectively) onto
A
the pipe and perform the flare processing with a
flare tool.
Pipe
Use the special R410A flare tool, or the conventional
(for R22) flare tool.
When using the conventional flare tool, always use an allowance adjustment gauge and
secure the A dimension shown in table 2.
BENDING PIPES
How to fixed 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
(1) When bending the pipe, be careful not to crush it.
(2) To prevent breaking of the pipe, avoid sharp bends.
Bend the pipe with a radius of curvature of 70 mm or over.
(3) If the copper pipe is bend the pipe or pulled to often, it will become stiff. Do not
bend the pipes more than three times at one place.
Holding spanner
Body side
Insulation tube
Cable clamp
90°
Torque wrench
To prevent gas leakage, coat the flare
surface with refrigerator oil.
Use VW-1, 1.0 mm thick, PVC tube as the insulation tube.
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