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Heat Pump Water Heater with Demand Response Ready and Water Leak Detection Engineering Manual
Due to our policy of continuous product innovation, some specications may change without notication.
© LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
ELECTRICAL GUIDELINES
EcoPort
®
CTA-2045
LG heat pump water heaters are equipped with an EcoPort CTA-2045. Where available, grid communication adapters (Universal Communi-
cation Modules [UCM]) may be supplied by the local electric company or field-supplied. Contact the local electric company to verify participa-
tion, plug-in module availability, and to learn more about potential energy savings opportunities.
Power Supply / Power Wiring
• LG heat pump water heaters operate at 1Ø, 208 / 240V, 60Hz. The voltage requirements and watt-
age load for the water heater are specified on the data plate on the right side of the water heater.
• A separate circuit with copper conductors, overcurrent protective device and suitable disconnect
capabilities must be provided by a qualified electrician.
• Ensure that the fuse or circuit breaker is properly sized for the water heater (review manufacturer’s
specifications).
• Maximum allowable voltage fluctuation ±10% or nameplate rated value. Confirm that the electrical
capacity is sufficient.
A voltage drop will cause the following problems:
1. Magnetic switch vibration, fuse breaks, or disturbance to the normal function of an overload
protection device.
2. Compressor will not receive the proper starting current.
• Power wiring is field supplied. Wire size is selected based on the MCA value, and must comply with all applicable local, state, and national
codes.
• Use flexible conduit only.
• Use a crimp type connector for the wiring.
• Securely connect the power wiring to the L1 and L2 terminal block connections.
• Ground wire must be longer than the common power wires.
• Disconnect all power before installing any electrical connections� Verify that there is no power to the power input cable�
• Power wiring must be firmly attached to the terminals; connect the wiring so that the wires cannot be easily pulled out� Loose wiring may
cause the wires to burnout or the terminal to overheat and catch fire. There is a risk of electric shock, physical injury or death.
• Terminal screws will become loose during transport. Properly tighten the terminal connections during installation or risk electric shock, phys-
ical injury, or death.
• Always use a circuit breaker or fuse when connecting electrical wiring to the water heater.
• Power wiring must be firmly attached to the terminals� 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.
• Terminal screws will become loose during transport. Properly tighten the terminal connections during installation or risk equipment malfunc-
tion or property damage. There is a risk of equipment malfunction or property damage.
General Electrical Guidelines
All wiring must conform to all applicable local, state codes, and National Electrical Code ANSI/NFPA 70 and the instructions
in the Owner’s and Installation Manual. Failure to follow applicable codes may result in risk electric shock, physical injury, or
death.
GN/YL
13/16 in.
Power
Wiring /
Ground
Figure 14: Heat Pump Water Heater
Power Wiring.
EcoPort is a registered trademark of OpenADR Alliance.
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