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OUTDOOR UNIT INSTALLATION
In snowy areas, facilities should be installed to
prevent snow. (See the chart below)(defective
facilities may cause malfunction.) Please lift the
bracket higher and install snow shed at the air
inlet and air outlet.
Snow shed for air inlet
Snow shed for air inlet
ELECTRIC WIRING
CAUTION
Please select power supply for indoor unit and
outdoor unit separately.
The power supply should have specified branch
circuit with leakage protector and manual switch.
The power supply, leakage protector and manual of all
the indoor units connecting to the same outdoor unit
should be universal. (Please set all the indoor unit power
supply of one system into the same circuit.)
Please put the connective wiring system between
indoor unit and outdoor unit with refrigerant piping
system together.
It is suggested to use 2-core shielded wire as signal
wire between indoor and outdoor units, multi-core wire
is unavailable.
Please comply with relevant National Electric Standard.
Power wiring should be done by professional electrician.
POWER WIRING
<Outdoor unit>
Separate Power Supply (without power facility)
(See table below)
Item
Min. Power wire diameter mm
Wiring of mental and synthetic resin
Power
supply
Model
Size Size
MDV-D252W/CS
380V 3N~
MDV-D280W/CS
16(29)
50Hz
MDV-D335W/CS
380V 3N~
MDV-D400W/CS
16(29)
MDV-D450W/CS
50Hz
Snow shed for air outlet
2
Manual switch
(A)
Leakage
protector
Grounding
Capacity Fuse
wire
25 (46)
100mA
16
60
50
35 (78)
0.1sec or
less
25 (46)
80
70
16
35 (78)
Note: Select power cord these five models separately
according to relevant standard.
MDV-D252( 8)W/S-830,MDV-D280(10)W/S-830,
MDV-D335(12)W/S-830, MDV-D400(14)W/S-830,
MDV-D450(16)W/S-830
Note: The wiring diameter and the length in the table indicate
the condition that the voltage dropping range is within
2%. If the length exceeds the above figure, please select
the wire diameter according to relevant standard.
Outdoor unit
Leakage
power supply
protector
380V 3N~
50Hz
Leakage
protector
Manual
switch
a
Branch box
With power facilities
b
Leakage
protector
Manual
switch
a
Branch box
Select the wire diameter
Power wiring refer to the main wire (a) connecting to
branch box and the wiring (b) between branch box and
power facilities. Please select the wire diameter according
to the following requirement.
(1) Diameter of main wire (a)
Depends on the total horsepower of outdoor unit and
following table.
E.g In system:(5Hp 1unit+8Hp 1unit+10Hp 1unit)
Total Hp=23Hp
(Table )
50m)
(2) Wiring(b) between branch box and power equipment
Depends on the number of combined outdoor unit. If fewer
than 5, the diameter is the same as that of main wire (a);
if more than6, there will be 2 electric control boxes, and the
diameter of wiring depends on the total horsepower of
outdoor
units
connecting to
following table.
Select wire diameter ( ) (table)
Manual
switch
Outdoor unit
GND
Outdoor unit
GND
Outdoor unit
GND
Outdoor unit
GND
Outdoor unit
GND
GND
Outdoor unit
Power facilities
(with leakage protector)
Outdoor unit
GND
GND
GND
b
GND
GND
Outdoor unit
GND
size of wire=70mm (within
each electric control box
2
(unit :mm)
2
and
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