Install Manual

8
Electrical Connections
Page 35
mrcool.com
8
BEFORE PERFORMING ANY ELECTRICAL WORK, TURN OFF ALL POWER TO THE SYSTEM.
Note that wire colors of this series/model may differ from previous models, other series and general
conventions.
All wiring must be performed in accordance with the wiring diagrams shown in Fig. 8.2 or Fig.
8.3 (pg. 36)
.
DO NOT MIX UP LIVE AND NULL WIRES
This is dangerous and can cause the air conditioning unit to malfunction. Make sure you clearly distinguish the
Live (”L”) Wires from the other wires.
All wiring must be performed in accordance with the wiring diagrams shown in this section.
BEFORE PERFORMING ELECTRICAL WORK, READ THESE REGULATIONS
1. All wiring must comply with local and national electrical codes.
2. All electrical connections must be made according to the Electrical Connection Diagram located on the
panels of the indoor and outdoor units.
3. If there is a serious safety issue with the power supply, stop work immediately. Explain your reasoning
to the client, and refuse to install the unit until the safety issue is properly resolved.
4. Power voltage should be within 90-100% of rated voltage. Insufficient power supply can cause
malfunction, electrical shock, and/or fire.
5. Circuit, including any switches, should have a capacity 1.5 times the maximum unit current (amps).
6. A qualified electrician must use an approved circuit breaker or switch that disconnects all poles and has
a contact separation of at least 1/8 in (3 mm).
7. Do not connect another appliance to the same circuit.
8. Make sure to properly ground the unit.
9. Every wire must be firmly connected. Loose wiring could cause the terminal to overheat, this could
result in a malfunction and/or fire. Double check that the screws are tightly fastened.
10. Do not allow wires touch or rest against refrigerant tubing, the compressor, or any moving parts within
the unit.
11. If the unit has an auxiliary electric heater, it must be installed at least 40 in (1 meter) away from
combustible materials.
12. To avoid getting an electric shock, always wait 10 minutes or more before touching any of the electrical
components after the power supply is turned off.
13. Make sure that you do not cross your electrical wiring with the signal wiring. This could cause distortion
and interference within the system.
14. The unit must be connected to the main outlet. Normally, the power supply must have an impedance of
32 ohms.
15. Connect the outdoor wires before connecting the indoor wires.