Rheem Gladiator Use & Care Manual
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Rheem Gladiator Use & Care Manual

Rheem Gladiator Use & Care Manual

Electric residential water heaters with electronic control
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Electric Residential
Water Heaters
®
LISTED
786H
Use & Care Manual
With Installation Instructions for the Installer
With Electronic Control
The purpose of this manual is twofold:
one, to provide the installer with the basic
directions and recommendations for the proper
installation and adjustment of the water heater;
and two, for the owner–operator, to explain
the features, operation, safety precautions,
maintenance and troubleshooting of the water
heater. This manual also includes a parts list.
It is imperative that all persons who are
expected to install, operate or adjust this
water heater read the instructions carefully
so they may understand how to perform
these operations. If you do not understand
these instructions or any terms within it, seek
professional advice.
Any questions regarding the operation,
maintenance, service or warranty of this
water heater should be directed to the seller
from whom it was purchased. If additional
information is required, refer to the section on
"If you need service."
Do not destroy this manual. Please read
carefully and keep in a safe place for future
reference.
!
Recognize this symbol as an
indication of Important Safety
Information!
AP20070

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  • Page 1 Use & Care Manual With Installation Instructions for the Installer Electric Residential Water Heaters With Electronic Control The purpose of this manual is twofold: one, to provide the installer with the basic directions and recommendations for the proper installation and adjustment of the water heater; and two, for the owner–operator, to explain the features, operation, safety precautions, maintenance and troubleshooting of the water...

  • Page 2: Table Of Contents

    Safety Information FOR YOUR RECORDS Safety Precautions ..3, 4 Write the model and serial numbers here: You can find them on a label on the appliance. Installation Instructions Staple sales slip or cancelled check here. Location .
  • Page 3 IMPORTANT SAFETY INFORMATION. READ ALL INSTRUCTIONS BEFORE USING. DANGER! WATER TEMPERATURE SETTING Safety and energy conservation are factors to be considered when selecting the water temperature setting of water heater’s thermostat. Water temperatures above 125°F can cause severe burns or death from scalding. Be sure to read and follow the warnings outlined on the label pictured below.

  • Page 4: Safety Precautions

    IMPORTANT SAFETY INFORMATION. READ ALL INSTRUCTIONS BEFORE USING. WARNING! For your safety, the information in this manual must be followed to minimize the risk of fire or explosion, electric shock, or to prevent property damage, personal injury, or loss of life.

  • Page 5: Location

    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 Electrical Code. It is available from some accordance with these instructions, local local libraries or can be purchased from codes, utility codes, utility company the National Fire Protection Association, requirements or, in the absence of local...

  • Page 6: Water Connections

    Installing the water heater Thermal Expansion Determine if a check valve exists in the This rapid pressure increase can quickly inlet water line. Check with your local reach the safety setting of the relief water utility. It may have been installed in valve, causing it to operate during each the cold water line as a separate back flow heating cycle.
  • Page 7 A new combination temperature and pressure relief valve, complying with the Standard for Relief Valves and Automatic Gas Shut-Off Devices for Hot Water Supply Systems, ANSI Z21.22, is supplied and must be installed in the opening provided and marked for the purpose on the water heater. No valve of any type should be installed between the relief valve and the tank.

  • Page 8: Electrical Connections

    Installing the water heater Electrical Connections Ground screw A separate branch circuit with copper The branch circuit wiring should include either: conductors, overcurrent protective device Metallic conduit or metallic sheathed and suitable disconnecting means must be cable approved for use as a provided by a qualified electrician.
  • Page 9 Insulation Blankets CAUTION: If local codes require the Insulation blankets, available to the application of an external insulation general public, for external use on electric WARNING: If local blanket to this water heater, pay careful water heaters are not necessary. The codes require external attention to the following so as not to purpose of an insulation blanket is to...
  • Page 10 Installing the water heater Relief Valve Insulation Installation For increased energy efficiency, some CAUTION: Ensure the water heaters have been supplied with T&P Valve opening is not obstructed by the a 2-3/8” section of pipe insulation. insulation. Please install the insulation, according to the illustrations above, that best meets your requirements.
  • Page 11 Installation Checklist A. Water Heater Location ❑ 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 heater. B.

  • Page 12: Operating Instructions

    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.

  • Page 13: Water Temperature

    Water Temperature Water Temperature Set Point Safety and energy conservation are factors The electronic control allows the water DANGER: There is a to be considered when selecting the water temperature to be set from 110°F to 150°F. hot water scald potential if temperature setting of the water heater’s the thermostat is set too The Performance Platinum residential...

  • Page 14: Electronic Control Operation

    Increase Water Temperature: Press RIGHT arrow until the desired temperature is shown. UNLOCK/LOCK (3 SEC) NOTE: A change in temperature is in increments of 5°F unless the Rheem EcoNet® app is used. SERVICE NEEDED SERVICE NEEDED CLEAR WiFi CLEAR WiFi...
  • Page 15 Locking The Keypad Press and hold both arrow SERVICE NEEDED SERVICE NEEDED buttons for 3 seconds to LOCK the control. Locking will reduce chance of unintentional changes CLEAR WiFi CLEAR WiFi ALARM SETUP ALARM SETUP in water temperature. SET POINT (°F) SET POINT (°F) VACATION 110 130 140 150...
  • Page 16 Programming the Electronic Control Vacation Setting Off Press RIGHT arrow until the desired SERVICE NEEDED SERVICE NEEDED water temperature is shown on the display. CLEAR WiFi CLEAR WiFi ALARM SETUP ALARM SETUP SET POINT (°F) SET POINT (°F) VACATION 110 130 140 150 VACATION 110 130 140 150...
  • Page 17 NOT PERMITTED. water around the water heater. Contact the Rheem call center or your local plumber if leak detection alert persists after the 24 hour override. The use of a fan can shorten the time to dry any residual moisture around the water heater.

  • Page 18: Setup Wi-Fi

    2. Connect mobile device to the local Wi-Fi network that the water heater will connect to. 3. Download the Rheem EcoNet® UNLOCK/LOCK app via the App Store or Google Play to your mobile device. (3 SEC) Create an EcoNet®...
  • Page 19 Error Codes for Electronic Control NOTE: The EcoNet® NUMBER OF BLINKS Blinking app will display all SERVICE NEEDED Alerts and Alarms in Indicator x1 = Lower Thermistor Failure the EcoNet® app with x2 = Leak Detected or Shutoff Valve Error specifics about the cause.

  • Page 20: Care And Cleaning

    Care and cleaning of the water heater. Draining the Water Heater CAUTION: Shut off power to the In order to drain the water heater, turn off water heater before draining water. the cold water supply. Open a hot water faucet or lift the handle on the relief valve DANGER: Before manually to admit air to the tank.

  • Page 21: Extended Shut-Down

    Care and cleaning of the water heater. Extended Shut-Down NOTICE: Refer to the If the water heater is to remain idle for an After a long shut-down period, the Hydrogen Gas Caution in extended period of time, the power and water heater’s operation and controls the Operating Instructions.

  • Page 22: Troubleshooting Tips

    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. Problem Possible Causes What To Do Rumbling noise Water conditions in your home ● Remove and clean the heating elements.

  • Page 23: Local Mode

    1. Press the Wi-Fi step up button until the unit beeps and the Wi-Fi LED blinks blue. 2. From the Rheem EcoNet® app click on the setting logo and select diagnostics Info. 4. Follow the on screen instructions.

  • Page 24: Parts List

    Replacement Parts. Instructions For Placing a Parts Order Address parts orders to the distributor or Part description (as noted below) and store where the heater was purchased. number of parts desired. All parts orders should include: CAUTION: For your safety DO NOT The model and serial number of the attempt repair of electrical wiring, thermostat(s), heating elements or other...
  • Page 25 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 water heater. Remove the jacket access panel or electronic control and insulation.

  • Page 26: Wiring Diagram

    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. Heating Element 2 PLS (240-5500 WATTS-MAX)
  • Page 27 Notes:...

  • Page 28: If You Need Service

    IF YOU NEED SERVICE 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 is unavailable, refer to the telephone directory, commercial listings or local utility for qualified service assistance.

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