ELECTRICAL WIRING
ENGLISH
47
5 Outdoor Unit Power Cable Specifications and Switch Capacity
• Make sure to use specified cables for connections so that no external force is imparted to
terminal connections. If connections are not fixed firmly, it may cause heating or fire.
• Make sure to use the appropriate type of overcurrent protection switch. Note that the
generated overcurrent may include some amount of direct current.
•
The earth leakage circuit breaker should be installed. Otherwise, there is a risk of electric shock.
•
Do not use anything other than the breaker and the fuse with correct capacity.
Using the fuse, cable, or cooper wire with too large capacity may cause a malfunction or fire.
• Be sure not to make the 3-phase 4-wire system of the indoor unit connection as a
reversed phase or open phase when connecting.
• Use round pressure terminals for connections to the power cable. It may cause fire or
flame damages on the electrical parts.
•
When installing the main power, make sure to have N phase. If the voltage of R.S.T. phase is
impressed in the “N” phase, it causes fire damage on the valuable electric components.
WARNING
!
Type of
Outdoor
Unit
Power
Specifications
Wire Thickness (mm
2
)
Earth Leakage
Circuit Breaker
(ELCB)
Main power
cable wire
Branch wire Ground wire
1Unit
3 Ø, 380 V3N~, 60 Hz 2.5 - 2.5 30A
1 Ø, 220 V~, 60 Hz 2.5 - 2.5 30A
2Unit
3 Ø, 380 V3N~, 60 Hz 4.0 - 2.5 ~ 4.0 60A
1 Ø, 220 V~, 60 Hz 6.0 - 2.5 ~ 6.0 60A
Branch wire
Power cable wire between a master and a slave1 outdoor unit — minimum of 2.5 mm²
h The above standards are based on CV wires.
h For detailed wire specifications, contact the head office.
h For 3-phase products, use 3-phase, 4-wire and 4-pole ELCB.
h For single-phase products, use 2-pole or 3-pole ELCB.
- Do not install any 'individual switch or electrical outlet' to disconnect each of indoor unit sepa-
rately from the power supply.
- Bear in mind the ambient conditions (ambient temperature, direct sunlight, rain water, etc.)
when proceeding with the wiring and connections.
- The cable size is the minimum value for metal conduit wiring.
The power cable size should be 1 rank thicker than normal, taking into account the cable voltage
drops.
- For the specific wiring work, comply with the requirements of the wiring regulations of the
region.
- For the power cable of the outdoor unit parts, use a standardized products.
- Do not connect the ground wire to any gas pipes, liquid pipes, lightening rod or telephone
ground wire.
- Make sure to use the leakage circuit breaker.
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