General - Daikin VRV Plus Series General Information Manual

Si33-003.book Page 152 Monday, June 25, 2001 9:06 AM
Field Wiring
7.5

General

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
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Make sure to connect the power source wire to the power source terminal block and to clamp it as
shown in figure 19, 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.
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.)
Do not connect the ground wire to gas pipes, sewage pipes, lightning rods, or telephone ground wires.
Gas pipes: can explode or catch fire if there is a gas leak.
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.
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 detector which are 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.)
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SiE33-003
Installation Manual