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31-5000579 Rev. 2 19
ENGLISH
ELECTRICAL WIRING
WARNING
• Electrical construction should be made with specific mains circuit by the qualified personnel according to the installation
instruction. Electric shock and fire may be caused if the capacity of power supply is not sufficient.
• During arranging the wiring layout, specified cables should be used as the mains line, which accords with the local
regulations on wiring. Connecting and fastening should be performed reliably to avoid the external force of cables from
transmitting to the terminals. Improper connection or fastness may lead to burning or fire accidents.
• There must be the ground connection according to the criterion. Unreliable grounding may cause electrical shocks. Do
not connect the grounding line to the gas pipe, water pipe, lightening rod and telephone line.
ATTENTION
• Only copper wire can be used. A properly sized breaker should be provided, or electric shock may occur.
• The wiring of the mains line is of Y type. The power plug L1 should be connected to the live wire and plug L2 connected
to null wire while should be connected to the ground wire. For the type with auxiliary electrically heating function,
the live wire and the null wire should not be misconnected, or the surface of electrical heating body will be electrified. If
the power line is damaged, replace it by the professional personnel of the manufacturer or service center.
• The power line of indoor units should be arranged according to the installation instruction of indoor units.
• The electrical wiring should be out of contact with the high-temperature sections of tubing as to avoid melting the
insulating layer of cables, which may cause accidents.
• After connected to the terminal tier, the tubing should be curved into be a U-type elbow and fastened with the pressing
clip.
• Controller wiring and refrigerant tubing can be arranged and ran together.
• Disconnect power from both outdoor and indoor units prior to servicing any component in the system.
• Seal the thread hole with heat insulating materials to avoid condensation.
• Signal line and power line are separately independent, which can't share one line. Signal line and power line spacing
greater than 3.9in (100mm).
• 5 butt lines (0.06in (1.5mm)) are equipped in the machine before delivery, which are used in connection between the
valve box and the electrical system of the machine. The detailed connection is displayed in the circuit diagram.
• The power cord must go through the wire hole from the outside into the machine, the wire holes need to be sealed with
rubber ring to prevent the wear of the power line insulation sheath; the use of the process should pay attention to the
protection of the power cord. Prevent sharp objects from damaging the insulation of the power cord. Damage to the
power cord may cause fever, fire and other accidents.
Wire Connections
1. Connecting circular terminals:
The connecting method of circular terminal is shown in the Fig. Take off the
screw, connect it to the terminal tier after heading it through the ring at the end of
the lead and then tighten it.
2. Connecting straight terminals:
The method of using straight terminals is shown as follows: loosen the screw before putting the wire into the terminal
block, tighten the screw and confirm it has been tightened by pulling the line gently.
3. Pressing connecting line:
After connecting line is completed, press the connecting line with clips which
should press on the protective sleeve of the connecting line.
Connecting
circular
terminals
Terminal tier
Pressing
Clip
Correct pressing Wrong pressing
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