Installation Manual
57
ENGLISH
Master
Slave1
Slave2
Master
Slave1
Slave2
Master
Slave1
Slave2
Master
Slave1
Slave2
Remote
controller
Remote
controller
Indoor
Unit
Indoor
Unit
Remote
controller
Outdoor Unit
Outdoor Unit
Outdoor Unit
Outdoor Unit
Remote
controller
Indoor
Unit
Indoor
Unit
Remote
controller
Remote
controller
Indoor
Unit
Indoor
Unit
Remote
controller
Remote
controller
Indoor
Unit
Indoor
Unit
2-Core Shield Cable
Multi-Core Cable
CAUTION
• Use the 2-core shield cables for transmission lines. Never use them together with power cables.
• The conductive shielding layer of cable should be grounded to the metal part of both units.
• Never use multi-core cable
• As this unit is equipped with an inverter, to install a phase leading capacitor not only will deterio-
rate power factor improvement effect, but also may cause capacitor abnormal heating. Therefore,
never install a phase leading capacitor.
• Make sure that the power unbalance ratio is not greater than 2%. If it is greater the units lifespan
will be reduced.
Electrical Wiring
When none are available, follow the instructions below.
• Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power wiring
may cause abnormal heat.)
• When connecting wiring which is the same thickness, do as shown in the figure below.
• For wiring, use the designated power wire and connect firmly, then secure to prevent outside
pressure being exerted on the terminal block.
• Use an appropriate screwdriver for tightening the terminal screws. A screwdriver with a small head
will strip the head and make proper tighterning impossible.
• Over-tightening the terminal screws may break them.
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Precautions when laying power wiring
Round pressure terminal
Power wire
Use round pressure terminals for connections to the power
terminal block.
CAUTION
When the 400 volt power supply is applied to “N” phase by mistake, replace inverter PCB and transformer in
control box.
Summary of Contents for Multi V ARUB Series
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