12
CAUTION
z
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)
z
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.
z
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
Table 5-2
Capicity(kW)
1.8~16
Indoor Unit
Power
Phase
1-Phase
Voltage and
Frequency
220-240V~ 50Hz
Power Wiring Size
Refer to Table 5-3 for wire size
Circuit Breaker (A)
16
Indoor Unit /Outdoor Unit Signal
Wire (mm²) (Weak electric
signal)
3-core shielded wire 3X0.75
5.2.1
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:
Table 5-3
Rated current of
appliance (A)
Nominal cross-sectional area (mm²)
Flexible cords
Cable for fixed wiring
≤3
0.5 and 0.75
1 to 2.5
>3 and ≤6
0.75 and 1
1 to 2.5
>6 and ≤10
1 and 1.5
1 to 2.5
>10 and ≤16
1.5 and 2.5
1.5 to 4
>16 and ≤25
2.5 and 4
2.5 to 6
>25 and ≤32
4 and 6
4 to 10
>32 and ≤50
6 and 10
6 to 16
>50 and ≤63
10 and 16
10 to 25
5.2.2
The method of fixing the power cord and signal line:
1. The method of fixing the power cord :
8kw 10/12kw 14/16kw
8kw 10/12kw 14/16kw
PQE
OAE
XYE
2. The method of fixing the signal wire :
8kw 10/12kw 14/16kw
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.
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
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
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.
Summary of Contents for KMF-120 DVN4
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