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mrcool.com
Unit Installation
WARNING
Before performing electrical work, read the following regulations
DO NOT
change the power cables arbitrarily.
DO NOT
change the length and terminals of the power cables.
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.
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.
The air conditioner circuit should be at least 5 ft (1.5 m) away from any flammable surface.
The external power cords, the thermostat wires, and thermostat must be effectively fixed.
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.
The external power cords, thermostat wires, and thermostat must
NOT
be squeezed. Never pull,
stretch, or bend the wires.
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 edges.
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.
Wiring terminals should be connected securely to the terminal board. A loose connection is unsafe.
Only use the power cables that are delivered along with the air conditioner. If you want to change
the power cables, please contact MRCOOL’s local service center.
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 tightly.
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 must be completed according to national wiring rules
and regulations.
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.
The unit must have uninterrupted and 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 Regulations
Electrical Connection
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***Disclaimer: Wiring must meet code specs according to the capacity/tonnage of the unit.***
