Wiring Design; Electrical Wiring - Fujitsu AIRSTAGE J-IIIL Design & Technical Manual

4. Wiring design

4-1. Electrical wiring

¢ Precaution
Regulations for wire diameter and selecting circuit breaker size differ from locality.
Always install in accordance with local standard.
WARNING
• Do not turn on the power until all installation work is complete.
• Before starting work, check the power is not being supplied to the unit.
• Connect the connection cable firmly to the terminal board. Imperfect installation may cause fire.
• Always install a circuit breaker for each power supply circuit. Failure to use a circuit breaker
could result in electrical shock or fire.
• Always install a disconnect switch for each power supply circuit.
• Always connect the ground wire.
• Always fasten the outside covering of the connection cable with the cable tie. (If the insulator is
chafed, electric leakage may occur.)
• Never install a condenser for improve the power factor. (It will not improve the power factor and
the condenser will become abnormally hot.)
• When installing this system in high humidity locations, install using Ground Fault Equipment
Breaker (GFEB) to reduce the risk of leaking current which may result in electric shock or poten-
tial fire.
CAUTION
• When approved for use in local code, we suggest installing Ground Fault Equipment Breaker
(GFEB). In that case, GFEB shall be per Fujitsu recommended capacity in order to prevent mal-
function of breaker device.
• Always use a dedicated power circuit for each condensing unit (outdoor unit). Never use a pow-
er supply shared by another appliance.
• "Wire size" and "Breaker" are for reference only; always install according to local regulations.
• Make the wire length between disconnect switch and unit terminal as short as possible provided
that it complies with local code.
• Installation and service of this product is only to be performed by qualified professionals.
• All field wiring and components must be provided by a licensed electrician.
• Use copper conductors only.
• Use crimp-type terminals and tighten the terminal screws to the specified torques, otherwise,
abnormal overheating may be produced and possibly cause serious damage inside the unit.
4-1. Electrical wiring
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4. Wiring design