Safety Precautions

Operating the water heater.

CAUTION: Hydrogen gas can be produced in a hot water system served by this water heater that has not been used for a long period of time (generally two weeks or more). HYDROGEN GAS IS EXTREMELY FLAMMABLE!! To dissipate such gas and to reduce risk of injury, it is recommended that the hot water faucet be opened for several minutes at the kitchen sink before using any electrical appliance connected to the hot water system. If hydrogen is present, there will be an unusual sound such as air escaping through the pipe as the water begins to flow. Do not smoke or use an open flame near the faucet at the time it is open.

Do turn off power to water heater if it has been subjected to over heating, fire, flood, physical damage.

Do Not turn on water heater unless it is filled with water.

Do Not turn on water heater if cold water supply shut-off valve is closed.

If there is any difficulty in understanding or following the Operating Instructions or the Care and Cleaning section, it is recommended that a qualified person or serviceman perform the work.

WARNING: If the water heater has been subjected to flood, fire, or physical damage, turn off power and water to the water heater.

Do not operate the water heater again until it has been thoroughly checked by qualified service personnel.

Safety Controls

The water heater is equipped with a temperature limiting control (ECO) that is located above the upper heating element in contact with the tank surface. If for any reason the water temperature becomes excessively high, the temperature limiting control (ECO) breaks the power circuit to the heating element. Once the control opens, it must be reset manually.

CAUTION: The cause of the high temperature condition must be investigated by qualified service technician and corrective action must be taken before placing the water heater in service again.

To reset the temperature limiting control: (Refer to Illustration on page 21):

Turn off the power to the water heater.

Remove the plastic housing.

Remove the jacket access top panel and insulation.

Press the red RESET button.

Replace the insulation and jacket access panel before turning on the power to the water heater.

!DANGER: There is a hot water scald potential if the thermostat is set too high. Households with small children, disabled, or elderly persons may require a 120°F or lower thermostat setting to prevent contact with

HOT water.

Water Temperature Setting

The temperature of the water in the water heater can be regulated by pushing the up or down arrow on the keypad located behind the access panel.

Safety and energy conservation are factors to be considered when selecting the water temperature setting of the water heater. The lower the temperature setting, the greater the savings in energy and operating costs.

To comply with safety regulations the temperature is factory set at 122°F or less where local codes require. This is the recommended starting point.

Water temperatures above 125°F can

cause severe burns or death from scalding. Be sure to read and follow the warnings outlined in this manual and on the label on the water heater. This label is located on the water heater near the electronic control access panel.

Mixing valves for reducing point of use water temperature by mixing hot and cold water in branch water lines are available. Contact a licensed plumber or the local plumbing authority for further information.

The chart on the next page may be used as a guide in determining the proper water temperature for your home.

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Rheem HP40RU, HP50RU, HP50RH, AP15121-1, 92-103234-02 Operating the water heater, Safety Controls, Water Temperature Setting

HP50RH, HP50RU, 92-103234-02, HP40RU, AP15121-1 specifications

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