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5
ELECTRICAL CONNECTION
• If incorrect / incomplete wiring is carried out, it will cause an electrical fi re or smoke.
• Use the cord clamps attached to the product.
• Do not damage or scratch the conductive core and inner insulator of power and communication wires when
peeling them.
• Use the power cord and communication wire of specifi ed thickness, type, and protective devices required.
• Do not connect 220-240 V power to the terminal blocks (A, B) for communication wiring. (Otherwise, the system
will fail.)
• Perform the electric wiring so that it does not come to contact with the high-temperature part of the pipe.
The coating may melt resulting in an accident.
REQUIREMENT
• For power supply wiring, strictly conform to the Local Regulation in each country.
• After connecting wires to the terminal blocks, provide a trap and fi x wires with the cord clamp.
• Run the refrigerant piping line and communication wiring line in the same line.
• Do not turn on the power of the Flow Selector unit until vacuuming of the refrigerant pipes completes.
• This Flow Selector unit has multiple ports. So piping and wiring to the same indoor unit shall be connected to the
same number (1, 2, 3, 4 ... ) of port.
Power supply wire and communication wires specifi cations
Power supply wire and communication wires are locally procured.
For the power supply specifi cations, follow to the table below. If capacity is little, it is dangerous because overheat
or burnout may be caused. For system wiring diagram, follow the Installation Manual attached to the outdoor unit.
Power supply
• Power supply wire specifi cation: Cable 3-core 2.5 mm², in conformity with Design 60245 IEC 57.
Power supply
Power supply switch / circuit breaker or power supply wiring / fuse rating for Flow Selector units should be
selected by the accumulated total current values of the Flow Selector units.
Power supply wiring
Safety device
• This circuit must be protected with the required safety devices like a main switch, a slow blow fuse on each
phase and an earth leakage circuit breaker.
• When using residual current operated circuit breakers, be sure to use a high-speed type (0.1 second or less)
30 mA rated residual operating current.
RBM-
MCA (A)
Y1801FU4PE
0.6
Y1801FU8PE
0.9
Y1801FU12PE
1.2
MCA: Min. Circuit Amps
MOCP: Maximum Overcurrent Protection (Amps)
EN-23
CAUTION
220-240 V ~, 50 Hz
220 V ~, 60 Hz
Below 50 m
2.5 mm²
MOCP (A)
15
Communication wiring
• 2-core with non-polarity wire is used for wiring of the communication wiring.
• Wire size : 0.5 mm² to 2.0 mm²
• Up to 300 m (L1 + L2 + L3 + L4)
Indoor unit
Ｌ
Ｌ
Remote controller
Leak Detector
The communication wiring and AC 220-240 V wires cannot be parallel to contact each other and cannot be
stored in the same conduits. If doing so, a trouble may be caused on the control system due to noise or
other factor.
Wire connection
REQUIREMENT
• Connect the wires matching the terminal numbers. Incorrect connection causes a trouble.
• Pass the wires through the bushing of wire connection holes of the Flow Selector unit.
• Keep a margin (Approx. 100 mm) on a wire to hang down the electrical control box at servicing.
• The low-voltage circuit is provided for the communication wires. (Do not connect the high-voltage circuit)
1
Loosen the upper side of the cover attachment screws (2 positions) of the electrical control
box, and remove the lower side of the screws (2 positions) to remove the cover.
2
The cable clamp (accessory) is installed in the underside of the Flow Selector unit.
3
Connect the power supply wire and communication wires to the terminal blocks of the
electrical control box.
4
Tighten screws of the terminal block securely, and fi x the wires with cord clamp attached
to the electrical control box. (Do not apply tension to the connecting section of the terminal
block.)
5
Mount the cover of the electrical control box so that it does not pinch the wires.
12
Ｌ
Ｌ
Flow Selector unit
CAUTION
EN-24
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