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Wiring work
Electrical work
f Wiring work should be performed in accordance with related laws such as technical specification on electric installation
X
or installation guide.
f Copper cable should be used for wiring work and all the wirings or parts should be rated products.
X
f Wiring work should be performed by a company certified by an electric power company.
X
f Refer to the circuit diagram attached to the outdoor unit for detailed wiring work.
X
f Wiring work should be performed after disconnecting main circuit breaker and Y-joint switch.
X
f You must perform ground working 3. (Grounding resistance value should be less than 100Ω.) When ELB is installed,
X
protective grounding resistance value can be applied. (When the ELB is 100mA, 0.1sec, protective grounding resistance
value should be less than 250Ω at a place where electric danger is high and should be less than 500Ω at other places. )
f Do not connect the ground wire to the gas pipe, water pipe, lightning rod, or telephone.
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- Gas pipe: If the gas leaks, explosion or ignition may occur.
- Water pipe: If rigid vinyl pipe is used, there will be no grounding effect.
- Ground wire of telephone and lightning rod: The electric potential of ground wire may rise abnormally when lightening
strikes.
f The ELB for ground-fault protection should be combined with MCCB or fuse equipped load switch. In this case, you
X
should use the one that has at least the same or larger fuse capacity or the rated current of MCCB.
f Use the wires that comply with regulated specification and firmly connect to the terminal board. Then tighten it with the
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provided screws so that the terminal board (connecting cable locally procured, grounding terminal) cannot be moved by
external force.
f When connecting outdoor unit main power, be aware of the connection order for 3 phase (R, S, T, N).
X
f If you install the heat pump system with a heater, install separate watt-hour meter.
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- If the common watt-hour meter is used with other products, you cannot measure the accurate electricity usage by the
heater. Contact service center for further technical information on installing watt-hour meter.
f Standard power cable length should be below 50m.
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- If the length has to be over 50m, contact service center.
f Fix a cable tube using a CD connector (wire conduit) and bushing at the knock-out hole of the outdoor unit.
X
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