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Electrical Precautions
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Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram
and these instructions when wiring. Improper connections and inadequate grounding can cause
serious injury or death.
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Before servicing, open and tag all disconnect switches. Never assume that electrical power is
disconnected. Check with meter and equipment.
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Only use electrical protection equipment and tools suited for this installation.
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Use specified cables between Central Station EX and the power supply/air conditioner/external
equipment.
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Shielded communication cable is not always required but strongly recommended to prevent
communication issues for applications such as: Heavy and Light Industrial Buildings, Telecom
Centers, Data Centers, Airports, Radio Stations, Hospitals/Healthcare buildings, and Offices.
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Use an exclusive power supply for the air conditioner at the unit's rated voltage.
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Be sure to install circuit breakers (ground fault interrupter, isolating switch, molded case circuit
breaker and so on), with the specified capacity. Ensure that the wiring terminals are tightened securely
to recommended torque specifications.
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Clamp electrical wires securely with a cable clamp after all wiring is connected to the terminal block.
In addition, run wires securely through the wiring access channel.
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When installing the power lines, do not apply tension to the cables. Secure the suspended cables at
regular intervals, but not too tightly.
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Turn OFF and disconnect Central Station EX from the power source when wiring. Do not open the
back cover without turning OFF the main power supply.
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Do not clean with, or pour water into Central Station EX as it could cause electric shock and/or
damage the product. Do not use strong detergent such as a solvent. Clean with a soft cloth.
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Check that the ground cable is securely connected. Do not connect ground wiring to gas piping, water
piping, lighting conductor, or telephone ground cables.
●
If there are frequent occurrences with blown fuses or flipped circuit breakers, shut down the system
immediately and contact your service contractor.
A12124820A
Take the following precautions to reduce the risk of electric shock, fire or
explosion resulting in serious injury or death.
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