5.2 Indoor Unit Wiring
Power Supply
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.)
CAUTION
Table 5-2
Single phase indoor unit
Wire controller
The reserved wire control
function is indicated in broken
line table, users can purchase
the wire controller when
necessary.
To wire controller
Display
board
WHITE
BLUE
BLACK
P Q
X Y E
YELLOW
GRA
Y
To Outdoor
COMM.BUS
To Central Control
Monitor (CCM)
COMM. BUS
Power Supply
Y/G
N
L
Please use 3-core shielded wire, and
connect the shielded layer to Grounding
XT1
XT3
Fig. 5-5
BLACK
E
Circuit Breaker (A)
16
Refer to Table 5-3 for wire size
Indoor Unit
Power
Phase
Voltage and
Frequency
1-Phase
220-240V~ 50Hz
Indoor Unit /Outdoor Unit
Signal Wire (mm
2
)
(Weak electric signal)
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.
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.
Addresses is set on field during the installation.
CAUTION
3-core shielded wire
3X0.75
Capicity(kW)
1.8~16
Power Wiring
Size
Nominal cross-sectional area (mm
2
)
>3
>6
>10
>16
>25
>32
>50
and
and
and
and
and
and
and
≤
3
≤
6
≤
10
≤
16
≤
25
≤
32
≤
50
≤
63
0.75
1
1.5
2.5
4
6
10
and
and
and
and
and
and
and
1
1.5
2.5
4
6
10
16
0.5 and
0.75
Flexible cords
Cable for fixed wiring
4
10
to
1.5
4
to
1
2.5
to
1
2.5
to
1
2.5
to
2.5
6
to
6
16
to
10
25
to
Rated current
of appliance(A)
Safety device requirements
5.2.2
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:
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.
5.2.3 The method of fixing the power cord and signal line:
1.The method of fixing the power cord :
8kw
10/12kw
14/16kw
2.The method of fixing the signal wire :
8kw 10/12kw
14/16kw
PQE
OAE
XYE
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.
Table 5-3
21
V.1