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6.5 Electric wiring system and installation
CAUTION
Select the power supply for the indoor units and outdoor
units separately.
The power supply should have a specified branch circuit
with a leakage protector and manual switch.
The power supply, leakage protector, and manual for all the
indoor units connecting to the same outdoor unit should be
universal. (Set the power supply for all indoor units in one
system on the same circuit. It should turn the units on and
off at the same time, or it will degrade service life or stop the
units from turning on at all.)
Install the connective wiring system between the indoor and
outdoor units together with the refrigerant piping system.
Use a 3-core shielded wire as a signal wire between indoor
and outdoor units. A multi-core wire is unavailable.
Comply with relevant National Electric Standard.
Power wiring should be completed by a professional
electrician.
6.5.1 Outdoor unit power wiring
Separate Power Supply (without power facility)
Table.6-3)
Table.6-3
Min. Power wire diameter (mm
Item
Wiring of mental and synthetic resin
Power
Size
supply
(Continuous length
Model
of pipe m)
4×10 mm
2
8~12HP
4×16 mm
2
4×10 mm
380-415V
14HP
4×16 mm
3N~ 50Hz
4×10 mm
/60Hz
16HP
4×16 mm
4×16 mm
18HP
4×25 mm
4×16 mm
20~22HP
4×25 mm
Select the power cord for these models separately according
to relevant standard.
The wiring diameter and the length in the table indicate that
the voltage drop range is within 2%. If the length exceeds the
above figure, please select the wire diameter according to
the relevant standard.
Manual switch
)
2
(A)
Grounding
Capacity Fuse
wire
(<20 m)
2
25
1×10 mm
32
(<50 m)
2
(<20 m)
(<50 m) 1×10 mm
2
40
2
2
(<20 m)
1×10 mm
2
40
2
(<50 m)
2
(<20 m)
1×16mm
2
50
2
(<50 m)
2
(<20 m)
2
1×16mm
63
2
(<50 m)
NOTE
380-415V 3N~ 50Hz/60Hz
Power facilities 1
(with leakage protector)
(See
Power facilities 2
(with leakage protector)
Leakage
protector
Select the wire diameter
Power wiring refers to the main wire (a) connecting to branch
box and the wiring (b) between branch box and power
100mA
35
facilities. Please select the wire diameter according to the
0.1sec or
following requirements.
less
35
Diameter of main wire (a)
40
Depends on the total horsepower of the outdoor unit and
following table.
50
e.g., In system: (8Hp×1unit+8Hp×1unit+10Hp×1unit)
Total Hp=26Hp→(Table.6-3)→size of wire=35mm2(within
50m)
Wiring (b): between the branch box and power equipment.
Depends on the total number of outdoor units. Fewer than
five means the diameter is the same as of the diameter of the
main wire (a); More than six requires two electric control
boxes. The diameter of the wiring depends on the total
horsepower of outdoor units connecting to each electric
control box and the following table.
Select wire diameter (≥) (table.6-4) (unit :mm
With power facilities
Outdoor unit
Manual
Leakage
power supply
switch
protector
C
( a )
Branch box
Manual
switch for
the leakage
protector
(a)
(b)
Branch box
Outdoor unit
GND
Outdoor unit
GND
GND
Outdoor unit
GND
Outdoor unit
Fig.6-5
Outdoor unit
GND
Outdoor unit
GND
Outdoor unit
GND
Outdoor unit
GND
Outdoor unit
GND
Outdoor unit
GND
Fig.6-6
2
)
Installation manual
21
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