Name
Quantity
2-core
Size
Indoor/Outdoor Unit Signal Wire
2
2
1.0mm 500m RVVP-1.0mm X2
Model of indoor unit
Room Name
For example: Indoor unit (A)
of the first system on second
floor is record as: 2F 1A.
Outdoor Unit
Ground
(Open)
(Series Control)
(Open)
Indoor/Outdoor
Unit Signal
Wire
Close end of the connection shield wire
ITEM
MODEL
Non Electric
Heating
Electric
Heating
In
d
o
o
r
U
n
it
Power
source
2
Minimum wire diameter(mm )
Dimension(m)
(continuous length)
2.0
(30m)
3.5
(50m)
f
1.6mm
30
15
Single
Phase
220V~
50Hz
3-Phase
380V~
50Hz
Leakage
protector
Grounding Capacity Fuse
Manual switch(A)
20A 30mA
0.1sec or
less
£¬
Distance between foot screws is shown as follow.
(15x20 Long hole)
A
B
C
Air inlet snow proof shed
Air outlet snow proof shed
Air inlet snow proof shed
2. In snowy places, equipment should be installed to prevent
snow.(As the figure below)(defective snow proof equipment
is easy to cause malfunction).To reduce the affection by
collective snow, please lift the bracket high, and install shelf
at the air inlet and air outlet.
ELECTRICAL WIRING
CAUTION:
Please select power source for indoor unit and outdoor unit
respectively.
The power supply has specified branch circuit with leakage
protector and manual switch.
The power supply leakage protector and manual switch
on all the indoor unit connecting to the same outdoor unit
should be universal.(Please set all the indoor unit power
of one system into the same branch circuit.)
Please put the connective piping system between indoor
unit and outdoor unit with the refrigerant system together.
Use 2-core screened wire as indoor and outdoor control
wire.
Please design a separate circuit for compressor heater
inside the unit for it is frequently heated in using season.
The installation should comply with relevant national electric
standard.
Power wiring should be engaged by specialized electrician.
< Outdoor Unit Wiring>
Separate Power Supply (without power facility)(Table 1)
ITEM
MODEL
Power
source
2
Minimum wire diameter(mm )
Dimension(m)
(continuous length)
MDV-D280W/SN
2
MDV-D280W/S
25(46)
16(29)
35(78)
16
60
50
380~415V
3N~
50Hz
Leakage
protector
Grounding Capacity Fuse
Manual switch(A)
100mA
0.1sec or
less
POWER WIRING
NOTE:
The wire diameter and continuous length is under the
condition that the voltage vibration is within 2%. If the
continuous length is exceed the above value, choose
the wire diameter according to relevant regulation.
With Power Facility
Outdoor power
supply
380~415V 3N~
50Hz
Leakage protector
Leakage protector
Manual switch
Junction part
Outdoor
unit
Outdoor
unit
Outdoor
unit
Outdoor
unit
Outdoor
unit
Outdoor
unit
Manual
switch
Grounding
Grounding
Grounding
Grounding
Grounding
Grounding
( a )
(b)
(b)
Junction part
Power facility
(with leakage protector)
O
u
td
o
o
r
u
n
it
O
u
td
o
o
r
u
n
it
Manual switch( A )
Grounding
Grounding
Grounding
Grounding
Grounding
Grounding
The power wiring is the mainline
(a)
to the junction box and
the wiring (b)
from the junction box to power facility. Please
choose as following:
(1) Diameter of the mainline (a)
Index Table 2: the sum of the outdoor unit horsepower.
For example: (5 horsepower X 1 unit + 8 horsepower X1
unit + 10 horsepower X 1 unit) = 23 horsepower (The total horsepower)
2
(table.2) wire diameter=60mm (50m below)
(2) Wire diameter(b) between junction box and power
Facility
When the assembled outdoor units is 5 or less, the same
with the mainline. When the group is
up
to
6 or
more,
the
control
box
of
the power facility will be divided
into two, and index Table 2 with the sum of the outdoor unit
horsepower.
Choose the wire diameter
2
Choose wire diameter
(not less than)(Unit: mm )
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
9
9
13
13
13
13
23
23
23
23
23
23
36
36
36
36
36
36
36
60
60
60
60
60
60
60
60
60
60
60
90
90
90
90
90
90
90
90
90
90
90
60
60
60
60
60
60
90
90
90
90
90
90
90
90
90
90
90
90
90
90
23
23
23
23
36
36
36
36
36
36
36
36
60
60
60
60
60
60
60
60
60
Sum of
Horsepower
Sum of
Horsepower
20m or less
20m or less
Wire length is
Wire length is
Wire length is
Wire length is
50m or less
50m or less
Choose the manual switch and fuse capacity for junction box.
(1) Decided by the connected outdoor unit (See Table 1),
when power facility is not concerned.
(2) As concerning to the power facility, according to the outdoor
unit horsepower sum to choose .(See Table 3)
Sum of Horsepower, Manual Switch and Fuse capacity List
(Table 3)
10~14
100
75
15~18
100
100
19~28
150
150
Sum of Horsepower Manual Switch (A) Fuse (A)
29~36
200
200
37~47
300
250
48~50
300
300
Sum of Horsepower Manual Switch (A) Fuse (A)
POWER WIRING
< Indoor Unit Wiring>
Power Supply (Table 1)
NOTE:
The wire diameter and continuous length is under the
condition that the voltage vibration is within 2%. If the
continuous length is exceed the showing value, choose
the wire diameter follow relevant regulation.
Single Phase 220-240V~ 50Hz
Current leakage Protector
Manual Switch
Wire Distribution Box
Indoor Unit
Indoor Power Supply
1
9
2
10
3
11
4
12
5
13
6
14
7
15
15
8
16
16
CAUTION
1. Refrigerant piping system indoor unit-indoor unit connection
signal wires and indoor unit-outdoor unit connection signal wire
are in the same system.
2. When power cord is parallel with signal wire, please put
them into separate wire distribution pipes, and leave a proper
distance.
(Reference distance: It is 300mm when current capacity of
power cord is less than 10A, or 500mm when 50A).
Please use shield wire as indoor unit/outdoor unit signal
wire.
Indoor/Outdoor unit signal wire wiring
TEST RUNNING
Operate according to "gist for test running" on the electric control
box cover
CAUTION:
Test running can not start until the outdoor unit has been
connected to the power for 12hr.
Test running can not start until all the valves are affirmed open.
Never make the forced running .(Or the protector sits back ,
danger will occur.)
FILL THE NAME OF CONNECTION SYSTEM
To clearly identify the connection systems between two
or
more
indoor
unit
and
outdoor
unit,
selects names
for
every
system
and
records them on the nameplate on the outdoor
electric control box cover.
PRECAUTION ON REFRIGERANT LEAK
A[kg]
3
B[m ]
This
air
conditioner
(A/C)
adopts
R407C or R22
as
refrigerant,
which is
innocuous
and nonflammable. The locating room of
the A/C should big enough that any refrigerant leakage is unable
to reach critical thickness. So certain essential action can be
taken on time.
Critical thickness------the Max. thickness of Freon without
any harm to person.
3
Refrigerant critical thickness: 0.3[kg/m ]
Confirm the critical thickness through follow steps, and take
necessary actions.
1. Calculate the sum of the charge volume (A[kg]) Total
Refrigerant volume of 10HP= factory refrigerant
superaddition
3
2. Calculate the indoor cubage (B[m ]) (as the minimum
cubage)
3. Calculate the refrigerant thickness
Countermeasure against over high thickness
1. Install
mechanical
ventilator to reduce the refrigerant thic-
kness under critical level. (ventilate regularly)
2. Install leak alarm facility related to mechanical ventilator if
you can not regularly ventilate.)
3
critical thickness: 0.3[kg/m ]
b. Leak alarm related to mechanical ventilator
A. Ventilation
peristome
(Leak hunting siren should be installed
in places easily keep refrigerant)
Indoor unit
Outdoor unit
Indoor
unit
Room full of leak refrigerant
(All refrigerant has run up)
The owner's manual of indoor unit and owner's manual of
outdoor unit must be turned over to the customer.
Explain the contents in the owner's manual to the customers
in details.
TURN OVER TO CUSTOMER
Indoor/Outdoor unit signal wire is low voltage circuit.
Do not let it touch the high voltage power wire and put
it to gather with power cord in the same wire distribution pipe.
CAUTION
Wire Size and Quantity
1. Signal wire is 2-core, polarized wire. Use 2-core shield wire
to prevent interference from outdoor. The grounding method
now is grounding the closed end of the shield wire and
opening (insulating) at the end. One point on outdoor side
is to be grounded.
2. The control between outdoor unit and indoor unit is
BUS type. Addresses is set on field during the installation.
Leakage protector
Table 2
OUTDOOR UNIT INSTALLATION
1. A 10mm distance should be left
between outdoor units.
M12 Foot screw 4Pieces per unit
<
6
5
0
m
m
Type
Size
A
B
C
10HP
20HP
30HP
1030
1030
2025
55
2025
3020
55
3020
The power supply of 20HP or 30HP is separated. Each item supply please refer to above MDV-D280W/SN
2
.
