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WIRING DESIGN
3.
ELECTRICAL WIRING
3-1.
PRECAUTION FOR ELECTRICAL WIRING
Regulation on wire diameter and selecting circuit braker size differ from locality.
Install in accordance with local rules and regulations.
WARNING
Wiring connections must be performed by a qualified person in accordance with the
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specifications. The voltage rating for this product is 400 V at 50 Hz. It should be operated within
the range of 342 to 456 V.
Before connecting the wires, make sure the power supply is OFF.
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Never touch electrical components immediately after the power supply has been turned off.
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Electrical shock may occur. After turning off the power, always wait 10 minutes or more before
touching electrical components.
Use a dedicated power supply circuit. Insufficient power capacity in the electrical circuit or
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improper wiring may cause electric shock or fire.
Install a breaker at the power supply for each outdoor unit. Improper breaker selection can
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cause electric shock or fire.
Install a leakage circuit breaker in accordance with the related laws and regulations. An
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improperly installed electrical box cover can cause serious accidents such as electric shock or
fire through exposure to dust or water.
A circuit breaker is installed in the permanent wiring. Always use a circuit that can trip all the
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poles of the wiring and has an isolation distance of at least 3 mm between the contacts of each
pole.
Use designated cables and power cables. Improper use may cause electric shock or fire by
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poor connection, insufficient insulation, or over current.
Do not modify power cable, use extension cable or branch wiring. Improper use may cause
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electric shock or fire by poor connection, insufficient insulation or over current.
Connect the connector cable securely to the terminal. Check no mechanical force bears on the
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cables connected to the terminals. Faulty installation can cause a fire.
Use crimp-type terminals and tighten the terminal screws to the specified torques, otherwise,
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abnormal overheating may be produced and possibly cause serious damage inside the unit.
Make sure to secure the insulation portion of the connector cable with the cable clamp.
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Damaged insulation can cause a short circuit.
Fix cables so that cables do not make contact with the pipes (especially on high pressure side).
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Do not make power supply cable and transmission cable come in contact with valves (Gas).
Never install a power factor improvement condenser. Instead of improving the power factor, the
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condenser may overheat.
Be sure to perform the grounding work.
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Do not connect grounding wires to a gas pipe, water pipe, lightning rod or grounding wire for a
telephone.
Connection to a gas pipe may cause a fire or explosion if gas leaks.
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Connection to a water pipe is not an effective grounding method if PVC pipe is used.
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Connection to the grounding wire of a telephone or to a lightning rod may cause a dangerously
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abnormal rise in the electrical potential if lightning strikes.
Improper grounding work can cause electric shocks.
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Securely install the electrical box cover on the unit. An improperly installed service panel can
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cause serious accidents such as electric shock or fire through exposure to dust or water.
