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Application Guidelines
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.
WATER SYSTEM COMPONENTS
Temperature and Pressure Protection
To reduce the risk of excessive temperatures and pressures, install protective equipment required by applicable local, state, and federal
codes. Install a combination temperature and pressure relief valve certified by a nationally recognized testing laboratory that maintains
periodic inspection of listed equipment or materials, and that meets the requirements for Relief Valves and Automatic Gas Shutoff Devices
for Hot Water Supply Systems (ANSI Z21.22). The temperature and pressure relief valve must be marked with a maximum set pressure that
does not exceed the maximum working pressure of the water heater. Install the temperature and pressure relief valve into the specific loca-
tion provided and indicated in the water heater.
Position the valve or add piping so that any discharge exits within six (6) inches above or at any distance below the structural floor, and does
not contact any live electrical components. The discharge opening must NOT be blocked or reduced in size under any circumstances.
Thermal Expansion
Verify with the local water utility company if a check valve is present on the inlet water line. A check valve located on the cold water inlet line
will create a “closed water system”, which will impart a pressure increase as the water is heated. A rapid pressure increase can quickly reach
the safety setting of the relief valve, and will cause it to open during each heating cycle.
It is recommended that a thermal expansion tank be connected to the cold water supply line. For additional information, contact the contrac-
tor, plumbing inspector, or water supplier, and check local, state, and federal codes.
Safety Controls
The water heater includes an emergency cut off (ECO) that is located above the upper heating element. If the water temperature becomes
excessively high, the ECO shuts off the power to the heating elements. Once the control opens, it must be reset manually.
A qualied contractor MUST troubleshoot the cause of the high temperature condition and x the issue before the water heater resumes operation.
There is a risk of burns, electric shock, physical injury or death.
Drain Pan
Most applicable codes require placing the water heater in a suitable drain pan piped to an adequate drain� Verify applicable codes before installing
the water heater�
A drain pan helps prevent property damage that may occur from condensation or leaks from the piping connections or tank. The drain pan for
LG heat pump water heaters should be a maximum of two (2) inches deep, and two (2) inches wider than the unit. The shape and size of the
drain pan can be freely selected depending on the installation environment. Verify the water heater is level in the drain pan after installation.
Insulation Blankets
An external, field-supplied insulation blanket is not necessary for LG heat pump water heaters. The LG Warranty does not cover any damage
or product failure caused by installing any type of unauthorized energy-saving or other devices. LG is not responsible for any injury or loss
resulting from the use of such unauthorized devices.
If applicable local / state codes require the installation of an external insulation blanket, ensure that its addition will not restrict the proper function
and operation of the LG heat pump water heater�
• Do NOT block the water heater air vents.
• Do NOT cover or attempt to relocate the information or warning labels attached to the water heater�
• Do NOT cover the control panel, temperature and pressure relief valve, drain valve, and junction box.
• Inspect the blanket frequently for wear and damage.
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