• Installation
2
•
Systems • Installation
10
2
Field wiring
2-1
cooling only / heat pump
•
Up to 3 units can be connected by crossover power source wiring between outdoor units. However, units of smaller capacity must be connected
downstream. For details, refer to the equipment design data and technical data.
•
Make sure to connect the power source wire to the power source terminal block and to clamp it as shown in figure chapter “Field line connection”.
•
As this unit is equipped with an inverter, installing a phase advancing capacitor not only will deteriorate power factor improvement effect, but also
may cause capacitor abnormal heating accident due to high frequency waves. Therefore, never install a phase advancing capacitor.
•
Keep power imbalance within 2% of the supply rating.
1.
Large imbalance will shorten the life of the smoothing capacitor.
2.
As a protective measure, the product will stop operating and an error indication will be made, when power imbalance exceeds 4% of the supply
rating.
•
Follow the “electrical wiring diagram” when carrying out any electrical wiring.
•
Only proceed with wiring work after blocking off all power.
•
Always ground wires. (In accordance with national regulations of the pertinent country.)
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Do not connect the ground wire to gas pipes, sewage pipes, lightning rods, or telephone ground wires.
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Gas pipes: can explode or catch fire if there is a gas leak.
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Sewage pipes: no grounding effect is possible if hard plastic piping is used.
•
Telephone ground wires and lightning rods: dangerous when struck by lightning due to abnormal rise in
electrical potential in the grounding.
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This unit uses an inverter, and therefore generates noise, which will have to be reduced to avoid interfering with other devices. The outer casing of
the product may take on an electrical charge due to leaked electrical current, which will have to be discharged with the grounding.
•
Be sure to install an earth leak detector. (One that can handle higher harmonics.)
(This unit uses an inverter, which means that an earth leak detector capable handling high harmonics in order to prevent malfunctioning of the earth
leak detector itself.)
•
Earth leak detectors made especially for protecting ground-faults should be used in conjunction with main switch or fuse for use with wiring.
•
This unit has a negative phase protection circuit. (If it operates, only operate the unit after correcting the wiring.)
Heat Pump (5~10HP)
Field power supply
Main switch
Cool/heat selector
Earth leak
detector
Earth leak detector
Remote
control
Fuse
Fuse
(V2398)
Power supply wiring (sheathed cable)
Transmission wiring (sheathed cable)
