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General safety precautions
Installer and user reference guide
12
RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1B – 2020.10
2.1.6 Electrical
DANGER: RISK OF ELECTROCUTION
▪
Turn OFF all power supply before removing the switch box cover, connecting
electrical wiring or touching electrical parts.
▪
Disconnect the power supply for more than 10 minutes, and measure the voltage
at the terminals of main circuit capacitors or electrical components before
servicing. The voltage MUST be less than 50 V DC before you can touch electrical
components. For the location of the terminals, see the wiring diagram.
▪
Do NOT touch electrical components with wet hands.
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Do NOT leave the unit unattended when the service cover is removed.
WARNING
If NOT factory installed, a main switch or other means for disconnection, having a
contact separation in all poles providing full disconnection under overvoltage
category III condition, MUST be installed in the fixed wiring.
WARNING
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ONLY use copper wires.
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Make sure the field wiring complies with the applicable legislation.
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All field wiring MUST be performed in accordance with the wiring diagram
supplied with the product.
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NEVER squeeze bundled cables and make sure they do NOT come in contact with
the piping and sharp edges. Make sure no external pressure is applied to the
terminal connections.
▪
Make sure to install earth wiring. Do NOT earth the unit to a utility pipe, surge
absorber, or telephone earth. Incomplete earth may cause electrical shock.
▪
Make sure to use a dedicated power circuit. NEVER use a power supply shared by
another appliance.
▪
Make sure to install the required fuses or circuit breakers.
▪
Make sure to install an earth leakage protector. Failure to do so may cause
electrical shock or fire.
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When installing the earth leakage protector, make sure it is compatible with the
inverter (resistant to high frequency electric noise) to avoid unnecessary opening
of the earth leakage protector.
CAUTION
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When connecting the power supply: connect the earth cable first, before making
the current-carrying connections.
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When disconnecting the power supply: disconnect the current-carrying cables
first, before separating the earth connection.
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The length of the conductors between the power supply stress relief and the
terminal block itself must be as such that the current-carrying wires are tautened
before the earth wire is in case the power supply is pulled loose from the stress
relief.
