Mitsubishi KXZ Series Technical Manual page 21

380V 60Hz
Power source (Indoor unit side)
Earth
Single-phase
leakage
220/240V 50Hz
breaker
220V 60Hz
Method of connecting power cables
(1) Method of leading out cables
As shown on the drawing in Section 4-2, cables can be laid through the front, right, left or bottom casing.
●
In wiring on the installation site, cut off a half-blank covering a penetration of the casing with nippers.
●
In the case of an installation using a collective drain system, use a port other than the bottom one to take out cables and pipes.
●
If the bottom port is used, seal it thoroughly so that drain water may not spill out.
(2) Notabilia in connecting power cables
Connect the ground wire before you connect the power cable. When you connect a grounding wire to a terminal
●
block, use a grounding wire longer than the power cable so that it may not be subject to tension.
Do not turn on power until installation work is completed. Turn off power to the unit before you service the unit.
●
Always connect power cables to the power terminal block.
●
To connect a cable to the power terminal block, use a round crimp contact terminal.
●
If two cables are to be connected to one terminal, arrange cables in such a manner that you put their crimp
contact terminals together back to back. Further, put the thinner cable above the thicker one in arranging cables
for such connection.
Use specified wires in wiring, and fasten them securely in such a manner that the terminal blocks are not
●
subject to external force.
In fastening a screw of a terminal block, use a correct-size driver.
●
Fastening a screw of a terminal block with excessive force can break the screw.
When electrical installation work is completed, make sure that all electrical components within the electrical
●
component box are free of loose connector coupling or terminal connection.
Power source specifications
(1) Outdoor unit power source (Indoor unit is another power source.)
Power source
Model
power source (mm
90KXZEN1-W
112KXZEN1-W
Single-phase
121KXZEN1-W
220/240V 50Hz
220V 60Hz
140KXZEN1-W
155KXZEN1-W
112KXZES1-W
Three-phase
121KXZES1-W
380/415V 50Hz
140KXZES1-W
380V 60Hz
155KXZES1-W
(2) Indoor unit power source (Outdoor unit is another power source.) & signal line
Cable size for
Combined total capacity
power source( mm
of indoor units
less than 7A 2
less than 11A 3.5
less than 12A 5.5
less than 16A 5.5
Please note
a) The method of laying cables has been determined pursuant to the Japanese indoor wiring regulations (JEAC8001). (Please adapt it to the regulations in
effect in each country)
b) Wire length in the table above is the value for when the indoor unit is connect to the power cable in series also the wire size and minimum length when the
power drop is less than 2% are shown. If the current exceeds the value in the table above, change the wire size according to the indoor wiring regulations.
(Please adapt it to the regulations in effect in each country)
c) For details, please refer to the installation manual supplied with the indoor unit.
How to connect signal cables
The communication protocol can be choosen from following two types. One of them is the conventional Superlink (hereinafter previous SL) and the other is the new
SuperlinkⅡ (hereinafter new SL) . These two communication protocols have the following advantages and restrictions, so please choose a desirable one meeting your
installation conditions such as connected indoor units and center control. When signal cables are connected into a network involving outdoor units, indoor units or
center control equipment that do not support new SL, please select communications in the previous SL mode, even if the refrigerant system is separated from theirs.
Communication protocol
Outdoor unit setting (SW5-5)
No. of connectable indoor units in a network
No. of connectable outdoor unitsin a network
Signal cable (total length)
Signal cable (furthest length)
Connectable units to a network
※1 New SL supporting units and non-supporting units cannot be used together in a same refrigerant system.
●A signal cable system is operated at DC5V, so never connect it to the power source 220/240V or 380/415V. If the power source is applied, a protective fuse
provided on the board will be actuated. If the protective fuse is actuated, follow the procedure set out below.
(1) Turn off power and make sure that 220/240V or 380/415V is not applied to signaling wires.
(2) In the case of an indoor unit, switch from CNK1 to CNK2 and cut the jumper line JSL1.
(3) In the case of an outdoor unit, switch from CNX1 to CNX2 and cut the jumper line J10.
(4) Check signal cable terminal block resistance before you turn on power. If the resistance value is 100 ohms or less, there is possibility that a power cable is connected to a
signal cable terminal block.
A typical resistance value is [46000 / (No. of connected FD○A△△KXE4 and KXE5 series units x 5) + (No. of connected FD○△△KXE6 and KXZ series units x 9)].
If the resistance value is 100 ohms or less, tentatively detach signal cables and thus, divide the network into more than one block (to reduce the number
of indoor units connected in a network) to check for cabling errors in each such block.
Signal line (for indoor units)
Circuit
breaker
Ａ ・ Ｂ
for cabling
L
・
N
Ｘ ・ Ｙ
Indoor unit
Grounding wire 〈 〉
Remote control wire
Ｘ ・ Ｙ
Moulded-case circuit breaker (A)
Cable size for Wire length
2 )
(m)
Rated current
8 32 40
3.5 46 20
Moulded-case circuit breaker (A)
Wire length(m)
)
2
Rated current Switch capacity
21
20
33
24 30
Conventional communication protocol (previous SL)
ON
Max. 48
Max. 48
Up to 1000m
Up to 1000m
Units not supporting new SL (FD○A△△KXE4 series)
Units supporting new SL (FD○△△KXE6 series)
Can be used together. (*1)
Signal line (between outdoor and indoor units <Ⅰ>)
・ ・ ・
・ ・ ・
Ａ ・ Ｂ
L
・
・ ・ ・
N
Ｘ ・ Ｙ
〈 〉
Remote
Ｘ ・ Ｙ
・ ・ ・
control
Earth leakage breaker
Switch capacity
40A, 30mA
50
less than 0.1 sec
20A, 30mA
30
less than 0.1 sec
Earth leakage breaker
20A, 30mA
less than 0.1 sec
30
30A, 30mA
less than 0.1 sec
New communication protocol (new SL)
OFF (factory setting)
Max. 128
Max. 32
Up to 1500m (When 0.75mm
Up to 1000m (When 1.25mm
Up to 1000m
Units supporting new SL (FD○△△KXE6 KXZ series)
19
- -
Ａ ・ Ｂ
L
・ CAUTION
N
Ｘ ・ Ｙ '20 • KX-T-373
If the earth leakage breaker is
exclusively for ground fault protection,
〈 〉
then you will need to install a circuit
breaker for wiring work.
Ｘ ・ Ｙ
Round crimp
Wire
contact terminal
Crimp
Terminal block
contact terminal
Diameter of a cable:thin
Diameter of a cable:thick
Earth wire
Size (mm ) Screw type
2
2 M4
2 M4
Signal line (mm 2 )
outdoor-indoor indoor-indoor
2 core × 0.75 ※
※Please use a shielded cable.
2 shielded cable used)
2 shielded cable used)
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