Rheem XE50M12EC45U0- User Manual

5 Installing the water heater. The location chosen for the water heater must take into consideration the following: Local Installation Regulations This water heater must be installed in accordance with these instructions, local codes, utility codes, utility company requirements or, in the absence of...

6 Installing the water heater. Typical Installation Thermal Expansion Determine if a check valve exists in the inlet water line. Check with your local water utility. It may have been installed in the cold water line as a separate back flow preventer, or it may be part of a pressure reducing valve, w...

7 ! WARNING: The pressure rating of the relief valve must not exceed 150 PSI, the maximum working pressure of the water heater as marked on the rating plate. A new combination temperature and pressure relief valve, complying with the Standard for Relief Valves and Automatic Gas Shut-Off Devices for ...

8 Installing the water heater. NOTICE: This guide recommends minimum branch circuit sizing and wire size based on National Electric Code. Refer to wiring diagrams in this manual for field wiring connections. Branch Circuit Sizing and Wire Size Guide CAUTION: The presence of water in the piping and w...

9 For increased energy efficiency, some water heaters have been supplied with two 24” sections of pipe insulation. Please install the insulation, according to the illustrations above, that best meets your requirements. Typical vertical piping arrangement Typical horizontal piping arrangement Hot and...

10 Installing the water heater. For increased energy efficiency, some water heaters have been supplied with a 2-3/8” section of pipe insulation.Please install the insulation, according to the illustrations above, that best meets your requirements. Slip the insulation cover over the T&P Valve thr...

11 Installation Checklist A. Water Heater Location B. Water Supply C. Relief Valve D. Wiring ❑ Close to area of heated water demand. ❑ Indoors and protected from freezing temperatures. ❑ Area free of flammable vapors. ❑ Provisions made to protect area from water damage. ❑ Sufficient room to service ...

12 Safety Precautions 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 underst...

13 Water Temperature Time/Temperature Relationship in Scalds Temperature Time To Produce a Serious Burn 120°F More than 5 minutes 125°F 1 1 / 2 to 2 minutes 130°F About 30 seconds 135°F About 10 seconds 140°F Less than 5 seconds 145°F Less than 3 seconds 150°F About 1 1 / 2 seconds 155°F About 1 sec...

14 POWERING ON WATER HEATER SETTING WATER TEMPERATURE LOCKING THE SCREEN or LockIcon *Note: If screen is dimmed press any button and release to brighten the display before performing desired action. Press and hold the On/Off button for 3 seconds to turn the water heater On Reduce Water Temperature: P...

17 CHANGE CHANGE SCROLL DISPLAY BEEP INSTANCE – NO- YES PRESS TOSELECT HIGH TEMPERATURE High temperature mode will allow the water temperature to be set above 140 degrees F. Press the DOWN arrow to change se tti ng then press SELECT. *Note: If screen is dimmed press any bu tt on and release to brigh...

18 Programming the Electronic Control – HEAT– UPPER TEMP– LOWER TEMP SCROLL PRESS TOSELECT STATUS HISTORY Use DOWN arrow to scroll through the menu. Press MENU/SELECT button to activate menu item. HEAT will display if an element is on or off. Choosing UPPER or LOWER TEMP will display the current temp...

19 CODE SCROLLING MESSAGE DESCRIPTION/ACTION A100 Lower temperature thermistor failure Electronic control has detected lower temperature sensor is bad. The problem could be the sensor, wiring, or the control board. Please call for service. A101 Upper temperature thermistor failure Electronic control...

20 Care and cleaning of the water heater. Draining the Water Heater CAUTION: Shut off power to the water heater before draining water. DANGER: Before manually operating the relief valve, make certain no one will be exposed to the hot water released by the valve. The water drained from the tank may b...

21 Care and cleaning of the water heater. Extended Shut-Down If the water heater is to remain idle for an extended period of time, the power and water to the appliance should be turned off to conserve energy and prevent a build-up of dangerous hydrogen gas.The water heater and piping should be drain...

22 Before You Call For Service… Troubleshooting Tips Save time and money! Review the chart on this page first and you may not need to call for service. CAUTION: For your safety DO NOT attempt repair of electrical wiring, temperature sensor, electronic control, heating elements or other safety device...

23 Replacement Parts. For 20–120 gallon models with single and double elements. Instructions For Placing a Parts Order Address parts orders to the distributor or store where the heater was purchased.All parts orders should include: The model and serial number of the water heater from the rating plat...

24 Cavity Insert Instructions The following instructions are intended for qualified service personnel ONLY, and should only be done when necessary. In order to replace the thermostat or heating element, remove the cavity insert crossbar by following the instructions below: Turn off the power to the ...

25 Wiring Diagram This water heater is wired as indicated in the schematic below. Use only a 2 wire power feed with ground connection for this water heater.

28 IF YOU NEED SERVICE 1. Should you have any questions about your new water heater, or if it requires adjustment, repair, or routine maintenance, it is suggested that you first contact your installer, plumbing contractor or previously agreed upon service agency. In the event the firm has moved, or ...