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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.
Air Filter
Display
Primary Condensate
Drain Line (3/4" PVC)
Secondary Condensate
Drain Line (1/2" PVC)
Flexible Connection
(Recommended)
Hot Water Outlet
*Thermal Expansion
Tank (If Required)
Drain Line Should
Be At Least 3/4" I.D.
Shut-off valve
Heat Trap
Min. 6"
Flexible Connection
(Recommended)
Cold Water Inlet
Drain Valve
Max. 6"
Temperature and
Pressure Relief Valve
and Discharge Line
Drain Pan
2" Depth Maximum
and 2" Wider than the
Water Heater
Automatic Shut Off Valve
(Leak Sensor Models Only)
The shape and size of the drain
pan can be freely selected
depending on the installation
WATER SYSTEM COMPONENTS
Figure 13: Water System Component Diagram.
Water System Components
High water temperatures increase the potential for hot water scalds.
The water temperature of LG water heaters is factory set to 120°F to comply with safety regulations; the temperature can be adjusted using the
display buttons�
For information on adjusting the water temperature, refer to the operating section in the Owner’s and Installation Manual on www.lghvac.com.
*In closed system, connect a thermal expansion tank to the water supply line.
Connecting the Water Supply
Do not directly solder or braze to hot or cold water connections� If sweat connections are used, sweat piping to the adapter before installing it to
the hot or cold water connections. Any heat applied to the water supply ttings will permanently damage the internal plastic lining in the ports.
• Check the type of water piping in the building; use fittings adequate for the piping type found.
• If the building includes copper piping, field-supplied dielectric connections must be installed to avoid corrosion caused by electric currents
common in copper water pipes.
• To disconnect the water heater for easier service or replacement, it is recommended that unions be installed on the water connections.
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