SiK401004_A
INSTALLATION 80
4. ELECTRIC WIRING WORK
4.1 Wiring Principle
4.1.1 General
Perform wiring of the power supply in conformance with the regulations of the local
electric company.
For the control wires connecting indoor units, and between indoor and outdoor units,
use of double-core shield wires is recommended to prevent noise trouble.
Be sure to set the earth leakage breaker and the switches to the power supply section
of the indoor unit.
Supply power to each outdoor unit and provide an earth leakage breaker or hand
switch for each outdoor unit.
Store wiring system for control and refrigerant piping system in the same line.
Arrange the cables so that the electric wires do not come to contact with
high-temperature part of the refrigerant pipe; otherwise coating melts and an accident
may be happened.
Do not turn on power of the indoor unit until vacuuming of the refrigerant pipe will be
completed.
Installation should be conducted by Local Wiring Regulation.
The rated voltage and exclusive power supply must be adopted for the air
conditioners.
The power cable should be reliable and fixed, in order to avoid the wiring terminal be
suffered from force. And do not drag the power cable forcibly.
The wire diameter of power cable should be large enough. If power cable and
connection wire be damaged; it should be replaced by the exclusive cable.
All electric installation must be done by specialist according to local law, regulation and
this manual.
It should be reliably grounded, and it should be connected to the special earth device,
the installation work should be operated by the professional.
The creep age protect switch and breaker must be installed.
Breaker should have the thermal dropout and magnetic dropout function, in order to
avoid the short circuit and overload.
The on site connection should refer to the circuit diagram, which is stuck on the unit
body.
The unit should be reliably grounded, if it is improperly grounded that may cause
electric shock or fire.
Air conditioner is the “I” class electric appliance, thus please do conduct reliable
grounding measure.
The yellow-green two-color wiring of air conditioner is grounding wire and cannot be
used for other purposes. It cannot be cut off and be fixed by screw, otherwise it would
cause electric shock.
The user must offer the reliable grounding terminal. Please don’t connect the
grounding wire to the following places:
Water pipe
Gas pipe
Blowing pipe
Other places that specialist consider them unreliable
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