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<Table 1>
System configuration
Transmission cable length
Facility example
Residence or independent store
(for noise judgment)
without noise
VCTF, VCTFK, CVV, CVS, VVR,
Types of transmission
VVF, VCT or shielding wire
cables
CVVS or CPEVS
Length
2. Remote controller cables
Types of cables
Sheathed 2-core cable (unshielded) CVV
Cable diameter
0.3 to 1.25 mm
Length
Less than 200 m
9.1. Power supply wiring
•
Power supply cords of appliances shall not be lighter than design 245 IEC 57
or 227 IEC 57.
•
A switch with at least 3 mm [1/8 in] contact separation in each pole shall be
provided by the Air conditioner installation.
Power cable size: more than 1.5 mm
[Fig. 9.1.1] (P.4)
A Switch 16 A
C Indoor unit
D Total operating current be less than 16 A
E Pull box
[Selecting non-fuse breaker (NF) or earth leakage breaker (NV)]
To select NF or NV instead of a combination of Class B fuse with switch, use the
following:
•
In the case of Class B fuse rated 15 A or 20 A,
NF model name (MITSUBISHI): NF30-CS (15 A) (20 A)
NV model name (MITSUBISHI): NV30-CA (15 A) (20 A)
Use an earth leakage breaker with a sensitivity of less than 30 mA 0.1 s.
Caution:
Do not use anything other than the correct capacity breaker and fuse. Using
fuse, wire or copper wire with too large capacity may cause a risk of mal-
function or fire.
9.2. Connecting remote controller, indoor
and outdoor transmission cables
•
Connect indoor unit TB5 and outdoor unit TB3. (Non-polarized 2-wire)
The "S" on indoor unit TB5 is a shielding wire connection. For specifications
about the connecting cables, refer to the outdoor unit installation manual.
•
Install a remote controller following the manual supplied with the remote con-
troller.
•
Connect the "1" and "2" on indoor unit TB15 to a MA remote controller. (Non-
polarized 2-wire)
•
Connect the "M1" and "M2" on indoor unit TB5 to a M-NET remote controller.
(Non-polarized 2-wire)
•
Connect the remote controller's transmission cable within 10 m [32 ft] using a
0.75 mm
2
[AWG18] core cable. If the distance is more than 10 m [32 ft], use a
2
1.25 mm
[AWG16] junction cable.
[Fig. 9.2.1] (P.4) MA Remote controller
[Fig. 9.2.2] (P.4) M-NET Remote controller
A Terminal block for indoor transmission cable
B Terminal block for outdoor transmission cable
C Remote controller
•
DC 9 to 13 V between 1 and 2 (MA remote controller)
•
DC 24 to 30 V between M1 and M2 (M-NET remote controller)
[Fig. 9.2.3] (P.4) MA Remote controller
[Fig. 9.2.4] (P.4) M-NET Remote controller
A Non-polarized
C Remote Controller
•
The MA remote controller and the M-NET remote controller cannot be used at
the same time or interchangeably.
For a single-refrigerant system
Less than 120 m [394 ft]
Building, clinic, hospital or communications
station without noise supposedly generated
from inverter equipment, private power gen-
erator, high-frequency medical equipment,
radio-used communications equipment and
so on
Less than 120 m [394 ft]
MA remote controller
2
[AWG22 to 16]
[656 ft]
2
[AWG16]
B Overcurrent protection 16 A
B TB15
D TB5
More than 120 m [394 ft]
Shielding wire CVVS or CPEVS
M-NET remote controller
Sheathed 2-core cable (unshielded) CVV
2
0.3 to 1.25 mm
[AWG22 to 16]
Add any portion in excess of 10 m [32 ft] to within the longest allowable transmis-
sion cable length 200 m [656 ft] (Shielding portion is more than 1.25 mm
Caution:
Install wiring so that it is not tight and under tension. Wiring under tension
may break, or overheat and burn.
9.3. Connecting electrical connections
Please identify the model name of the operation manual attached on the terminal
bed box cover with that shown on the rating name plate.
1. Remove the screw (2pcs) holding the cover to dismount the cover.
[Fig. 9.3.1] (P.5)
A Screw holding cover (2pcs)
2. Open knockout holes
(Recommend to use a screwdriver or the like for this work.)
[Fig. 9.3.2] (P.5)
A Terminal bed box
C Remove
3. Fix power source wiring to terminal bed box by using buffer bushing for tensile
force. (Conduit or the like.) Connect transmission wiring to transmission termi-
nal bed through the knockout hole of terminal bed box using ordinary bushing.
[Fig. 9.3.3] (P.5)
E Use conduit to keep the weight of the cable and external force from being applied
to the power supply terminal connector.
F Power source wiring
H Terminal bed box
I Knockout hole (for power source wiring)
J Washer (accessory)
L Use ordinary bushing
4. Connect the power source, Ground, transmission and remote controller wiring.
The dismounting of the terminal bed box is not needed.
[Fig. 9.3.4] (P.5)
N Power source terminal bed
P Terminal bed for remote controller
R Transmission line DC 30 V
S Terminal bed for outdoor transmission line (TB3)
T Transmission line to the remote controller, terminal bed for indoor unit and BC
controller
[Shield wire connection]
[Fig. 9.3.5] (P.5)
A Terminal bed
C Shield wire
D The ground wire from two cables are connected together to the S terminal. (Dead-
end connection)
E Insulation tape (To keep the ground wire of the shielded cable from coming in
contact with the transmission terminal)
5. After wiring is complete, make sure again that there is no slack on the connec-
tions, and attach the cover onto the terminal bed box in the reverse order of
removal.
Notes:
•
Do not pinch the cables or wires when attaching the terminal bed box
cover. Doing so may cause a risk of disconnection.
•
When accommodating the terminal bed box, make sure that the connec-
tors on the box side are not removed. If removed, it cannot operate nor-
mally.
For a multi-refrigerant system
Regardless of length
All facilities
Less than 200 m [656 ft]
2
[AWG16])
B Cover
B Knockout hole
G Conduit
K Tensile force
M Transmission wiring
O Terminal bed for indoor transmission
Q To 1-phase power source
B Round terminal
11
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