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mrcool.com
Unit Installation
WARNING Before performing electrical work, read the following regulations
1. Electrical installation must be conducted by professionals in compliance with local laws,
regulations and this installation manual. Never artificially extend the length of a 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 unit. Do not draw power from another power circuit.
3. The air conditioner circuit should be at least 5 ft (1.5 m) away from any flammable surface.
4. The external power cords, the thermostat wires and thermostat must be effectively fixed.
5. The external power cords, thermostat wires, and thermostat 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 cords, thermostat wires, and thermostat must NOT be squeezed. Never pull,
stretch or bend the wires.
7. The external power cords, thermostat wires, and thermostat must NOT collide with any metal
beam or edge on the ceiling, or touch any metal burrs or sharp metal edge.
8. Connect wires in accordance to the circuit diagram labeled on the unit or electric box. Screws
must be tightened. Slipped screws must be replaced by specialized flat-head screws.
9. Wiring terminals should be connected firmly to the terminal board. Loose connection is not safe.
10. Only use the power cables that are delivered along with the air conditioner. DO NOT change the
power cables arbitrarily. DO NOT change the length and terminals of the power cables.
11. After the electrical installation is finished, please use wire clamps to secure the power cords and
thermostat wires. Make sure the wires are not clamped too tight.
12. The wire gauge of the power cord should be sufficiently large. A 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 product is factory shipped for use with a 208/230V-1Ph-60Hz electrical power supply. This air
handler must not be reconfigured to operate with any other power supply.
14. The unit must have an uninterrupted, unbroken electric grounding to minimize the possibility of
personal injury if an electric fault occurs. The electric grounding circuit may consist of an appropriate
sized power cord connected with the grounding piece, located in the unit control box, and also
connecting to the building electric service panel. Other methods of grounding are permitted if
performed in accordance with the National Electric Code (NEC), American National Standards
Institute (ANSI), National Fire Protection Association (NFPA) 70, and local/state codes. In Canada,
electric grounding conforms to the Canadian electric code CSA c22.1. Failure to observe this warning
can result in electrical shock that can cause personal injury.
Vacuum Lines
Electrical Connection
Electrical Regulations
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