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Indoor Unit Installation
BEFORE PERFORMING ANY ELECTRICAL WORK, TURN OFF ALL POWER TO THE SYSTEM.
BEFORE PERFORMING ELECTRICAL WORK, READ THESE REGULATIONS
Fig. 5.11bFig. 5.11a
208-230V ~ Models
L1 L2 S L1 L2
L1 L2 S G
Indoor Unit
Single Zone Outdoor Unit
see Outdoor Unit Installation for Multi-Zone
Power Supply
WARNING
DO NOT connect another appliance to outlet dedicated to the unit. The unit should be
connected to an individual branch circuit outlet.
DO NOT allow the wires to touch or rest against the refrigerant piping, the compressor, or any
moving parts within the unit.
1. All wiring must be installed by a licensed electrician and 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 90-110% of the rated voltage. An insufficient power supply
can cause a malfunction, electrical shock, and/or fire.
5. If connecting to fixed wiring, a surge protector and main power switch should be installed.
The qualified technician must install and incorporate an approved circuit breaker or switch
that disconnects all poles, and has a contact separation of at least 1/8 in (3 mm), into the
fixed wiring.
6. Circuits, including any switches should have 1.5 times the maximum unit current (amps).
7. Ensure the unit is properly grounded.
8. Ensure every wire is firmly connected. Loose wiring can cause the terminal to overheat which
could result in a malfunction and/or fire.
9. If the unit is equipped with an auxiliary heater, it must be installed at least 40 in (1 m) away
from combustible materials.
10. To avoid electrical shock, never touch the electrical components directly after the power
supply has been turned off. Once the power has been turned off, always wait at least 10
minutes before touching any electrical components.
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