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mrcool.com
Unit Installation
WARNING Before performing electrical work, read the following regulations
1. Electrical installation must be conducted only by professionals in compliance with local laws,
regulations and this installation manual. Never artificially extend the length of power cord. The
electric circuit must be equipped with a circuit breaker and air switch. Both must have sufficient
capacity.
2. Unit operating power must be within the nominal range stated in the instruction manual. Use a
specialized power circuit for the air conditioner. Do not draw power from another power circuit.
3. The air conditioner circuit should be at least 1.5m away from any flammable surface.
4. The external power cord and the communication wire must be effectively fixed.
5. The external power cord and the communication wire must NOT directly contact any hot objects.
For example: they must not come into contact with chimney pipes, warm gas pipes or other hot
objects.
6. The external power cord and the communication wire must NOT be squeezed. Never pull, stretch
or bend the wires.
7. The external power cord and the communication wire must NOT collide with any metal beam or
edge on the ceiling, or touch any metal burrs or sharp metal edge.
8. Connect wires correspondingly by referring to the circuit diagram labeled on the unit or electric
box. Screws must be tightened up. Slipped screws must be replaced by specialized flat-head screws.
9. Please use the power cables that are packaged with the appliance. Do not change the power
cables arbitrarily. Do not change the length and terminals of the power cables. If you want to change
the power cables, please contact MRCOOL’s local service center.
10. Wiring terminals should be connected firmly to the terminal board. Loose connection is
forbidden.
11. After the electrical installation is finished, please use wire clamps to secure the power cord,
connection wire of temperature controller and outdoor unit and the communication cords. Make
sure the wires are not clamped too tight.
12. The wire gauge of power cord should be sufficiently large. Damaged power cord or other wires
must be replaced by specialized wires. Wiring work must be done according to national wiring rules
and regulations.
13. This outdoor unit has a heating four-way valve.
Electrical Connection
Electrical Regulations
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