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Due to our policy of continuous product innovation, some specications may change without notication.
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REFRIGERANT DESIGN | 67
Refrigerant Piping Design & Layout Best Practices
ELECTRICAL CONNECTIONS
Figure 34: LAU090HYV3/
LAU120HYV3 Outdoor Unit
Electrical Connection.
Outdoor Electrical Connection
1. Remove the control cover from the unit by loosening the fasten-
ing screw.
2. Take off the caps on the conduit panel.
3. Connect both the power supply and low voltage lines to the cor-
responding terminals on the terminal block.
4. Be sure to ground the unit by following local codes.
5. Allow for enough length (add several inches) for each wiring.
6. Secure the cable with a cord clamp.
7. Secure conduit tubes with lock nuts.
8. Reattach the control cover to the original position with the fasten-
ing screw.
Figure 35: LAU150HYV3/
LAU180HYV3/LAU240HYV3
Outdoor Unit
Electrical Connection.
Figure 36: Circuit Breaker.
• Separately wire the high and low voltage lines to avoid damage to unit.
• Local codes may require field-installed disconnect switches from outdoor unit to indoor unit.
• Use heat-proof electrical wire capable of withstanding temperatures up to 167°F to avoid damage to unit.
• Always use a circuit breaker or time delay fuse when connecting electrical wiring to the unit.
• Ensure you connect the wire firmly. Loose wiring may cause unit malfunction, the wires to burnout or the terminal to overheat and catch
fire. There is a risk of equipment malfunction or property damage.
• Use outdoor and waterproof connection cable rated up to 300V for the connection between the indoor and outdoor unit to avoid dam-
age to the unit.
• Comply with local codes while running wire from the indoor unit to the outdoor unit.
•
Do not allow wire to touch refrigerant tubing, the compressor or any moving parts since it can lead to mechanical failure.
• Separately wire the high and low voltage lines. There is a risk of electric shock,
physical injury, or death.
• Use heat-proof electrical wire capable of withstanding temperatures up to 167°F
to avoid wiring malfunction and electrical shock, which may cause physical injury
or death.
• Ensure you connect the wire firmly. Loose wiring may cause unit malfunction,
the wires to burnout or the terminal to overheat and catch fire. There is a risk of
electric shock, physical injury or death.
• Use outdoor and waterproof connection cable rated up to 300V for the connection
between the indoor and outdoor unit to avoid electrical shock, which may cause
physical injury or death.
Terminal Block
Connecting
Cable
Power
Supply
Cord
Conduit Panel
Tubing Cover
Over 0.2”
Air
Conditioner
Main Power Source
Circuit Breaker
Use a circuit breaker
or time delay fuse
Terminal Block
Over 0.2”
Terminal Cover
Conduit Panel
Connecting
Cable
Power Supply
Cord
1(L1) 2(L2) 1(L1) 2(L2)
3
Figure 37: LAU090HYV3, LAU120HYV3, LAU150HYV3, LAU180HYV3,
LAU240HYV3 Outdoor Unit Electrical Connection.
208/230 VAC
8P
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