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CAUTION
When the power cable is parallel to the signal wire, make sure
that they are enclosed in respective conduits and are kept a
reasonable wire spacing. (Distance between power cables:
less than 10A-300mm;less than 50A-500mm)
The three-core shielded cable is used as the signal cables of
the IDUs and ODU, and the shield layer must be grounded as
required.
The display box and build-out resistor are IDU accessories.
The remote controller, centralized controller and wired
controller are optional accessories. If necessary, contact the
local distributor for purchase. (Note: The BP3 series IDUs
provide standard remote controllers.)
5.2 Indoor Unit Wiring
Power Supply
Capicity(kW)
Phase
Voltage and
Indoor Unit
Frequency
Power
Power Wiring
Size
Circuit Breaker (A)
Indoor Unit /Outdoor Unit
Signal Wire (mm
2
)
(Weak electric signal)
5.2.2
Safety device requirements
1. Select the wire diameters( minimum value) individually for each
unit based on the table 5-1 and table 5-2， where the rated
current in table 5-1 means MCA in table 5-3. In case the MCA
exceeds 40A, the wire diameters should be selected according to
the national wiring regulation.
2. Maximum allowable voltage range variation between phases is
2%.
3. Select circuit breaker that having a contact separation in all poles
not less than 3 mm providing full disconnection，where MFA is
used to select the current circuit breakers and residual current
operation breakers:
Nominal cross-sectional area (mm
Rated current
of appliance(A)
Flexible cords
≤3
0.5 and
>3
and
≤6
0.75
and
>6
and
≤10
1
and
>10
and
≤16
1.5
and
>16
and
≤25
2.5
and
>25
and
≤32
4
and
>32
and
≤50
6
and
and
>50
and
≤63
10
Table 5-2
1.8~16
1-Phase
220-240V~ 50Hz
Refer to Table 5-3 for wire size
16
3-core shielded wire
3X0.75
Table 5-3
)
2
Cable for fixed wiring
0.75
1
to
1
to
1
1
to
1.5
1.5
to
2.5
4
2.5
to
6
4
to
10
6
to
16
10
to
5.2.3 The method of fixing the power cord and signal line:
1.The method of fixing the power cord :
8kw
2.The method of fixing the signal wire :
8kw
The fixed mode of signal wire 8kw and 14/16kw is shown in the figure.
The signal wire goes through the wire clamp, and the cable is tightly
tied to the clamp with a belt to prevent the signal wire from moving up
and down.
N
L
Y/G
Power Supply
1. Signal wire is 3-core, polarized wire. Use 3-core shield wire to
prevent interference. The grounding method now is grounding
the closed end of the shield wire and opening (insulating) at the
end. Shield is to be grounded.
2. The control between outdoor unit and indoor unit is BUS type.
2.5
Addresses is set on field during the installation.
2.5
2.5
4
6
Indoor/Outdoor unit signal wire is low voltage circuit. Do not
10
let it touch the high voltage power wire and put it to gather
with power cord in the same wire distribution pipe.
16
25
21
10/12kw
10/12kw
Single phase indoor unit
X Y E
P Q
E
XT3
XT1
To Central Control
To Outdoor
Monitor (CCM)
COMM.BUS
COMM. BUS
Please use 3-core shielded wire, and
connect the shielded layer to Grounding
CAUTION
14/16kw
14/16kw
PQE
OAE
XYE
Display
board
Wire controller
To wire controller
The reserved wire control
function is indicated in broken
line table, users can purchase
the wire controller when
necessary.
Fig. 5-5
V.1
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