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Rheem RTG 64DV - User Manual

Rheem RTG 64DV
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Questions and Answers

  • S
    Stephen ThorntonAug 12, 2025
    Why is my Rheem RTG 64DV Water Heater not producing enough hot water?
    • M
      Mary HansenAug 13, 2025
      If you're not getting enough hot water from your Rheem Water Heater, several factors could be at play. First, ensure the water shutoff valve is fully opened. Check that the hot water faucet is completely open, as the burner might shut off if the water volume is too low. Frozen water pipes could also be the culprit, so allow them to thaw. Verify that the unit is turned 'ON' using the remote control and that the temperature isn't set too low—increase it if necessary. Other potential issues include a clogged water inlet filter or fixture aerator, which you should clean. In some cases, scale buildup in the heat exchanger, reversed hot and cold water lines or not enough water demand can cause this issue.
  • V
    Vanessa Levine DDSAug 16, 2025
    Why is the water from my Rheem RTG 64DV Water Heater not hot enough?
    • J
      Jackson HerringAug 17, 2025
      If your Rheem Water Heater isn't providing water hot enough, start by checking the temperature setting and increase it if it's too low. Make sure the gas valve is fully opened. Low gas supply pressure could also be the reason, so contact your gas company to check the gas meter and piping size. Bleed over in one of the hot water fixtures can also cause this issue.
  • B
    Brian NavarroAug 20, 2025
    How to fix too hot water from Rheem Water Heater?
    • W
      wagnerwilliamAug 20, 2025
      If the water from your Rheem Water Heater is too hot, the temperature setting might be too high; try decreasing it. Also, make sure the water shutoff valve is fully opened. If only a small amount of water has been heated, allow more water to flow.
  • R
    richmondpaulAug 25, 2025
    What to do if Rheem RTG 64DV Water Heater shows Error Code 11?
    • C
      Carla WhiteAug 25, 2025
      Error Code 11 on your Rheem Water Heater indicates that the gas shutoff valve is not completely open. Make sure to open the gas shutoff valve fully.
  • D
    David MartinezAug 27, 2025
    What does Error Code 15 mean on a Rheem RTG 64DV?
    • K
      Kelsey CummingsAug 28, 2025
      Error Code 15 on your Rheem Water Heater means the hot water faucet isn't opened enough. Open the faucet more to ensure sufficient water volume.
  • M
    mcdonaldkarenAug 31, 2025
    What does error code 12 mean on my Rheem Water Heater?
    • N
      Nicholas RussellAug 31, 2025
      Error Code 12 on your Rheem Water Heater indicates that the gas service has been interrupted or, if it's an LP model, that the LP gas is running low. Contact your gas utility company or refill/replace the LP gas container.
  • T
    Timothy Smith MDSep 4, 2025
    What does Rheem RTG 64DV Water Heater Error Code 05 mean?
    • J
      James CampbellSep 4, 2025
      If your Rheem Water Heater displays Error Code 05, it could mean that the air intake or vent termination is blocked, or the vent pipes on the concentric vent termination may not be connected properly. Remove any obstructions on the air intake or vent termination.
  • D
    David ThomasSep 7, 2025
    Why does the fan keep running on my Rheem Water Heater?
    • T
      timothy20Sep 8, 2025
      The continued rotation of the fan after the hot water faucet is closed on your Rheem Water Heater is normal operation. There is no need to call for service.

Summary

Safety Information and Alerts

General Safety Alerts

Explains DANGER, WARNING, CAUTION, and NOTICE symbols for hazards.

Specific Safety Warnings

Highlights warnings for manufactured homes and California Proposition 65.

Installation and Gas Safety

Venting and Flammable Material Safety

DANGER regarding improper venting and flammable materials.

Gas Leak and Type Safety

DANGER regarding gas types, leaks, and safe handling procedures.

Temperature and Regulatory Compliance

Water Temperature Scald Hazards

DANGER of severe burns from water over 125°F (52°C).

California Installation Requirements

Specific safety and bracing requirements for California installations.

Installation Procedures

Location and Venting Requirements

Guidelines for selecting water heater location and venting system.

Condensate Management

CAUTIONs and WARNINGs for handling acidic condensate.

Venting System Installation

Vent Terminal Location and Clearances

Table detailing required clearances for horizontal vent terminals.

Horizontal and Vertical Venting

Steps for installing horizontal and vertical vent systems.

Water Heater Connections

Mounting and Water Supply

Instructions for mounting the heater and connecting water supply.

Relief Valve Installation

Specifications and installation for pressure relief valves.

System Setup and Controls

Gas Supply and Testing

Gas supply connection, leak testing, and pressure requirements.

Remote Control and Electrical Wiring

Guidelines for remote control placement and electrical connections.

Installation Verification

Typical Installation Overview

Diagram illustrating a typical installation of the water heater.

Comprehensive Installation Checklist

Detailed checklist covering all aspects of installation.

Operating the Water Heater

Startup and Shutdown Procedures

Critical safety steps and procedures for lighting and turning off the unit.

Water Temperature Adjustment

Guidance on setting temperature and understanding scald risks.

Care and Maintenance

Routine Cleaning and Inspection

Recommended periodic inspections and cleaning tasks.

Draining and Freeze Protection

Instructions for draining the unit and protecting against freezing.

Troubleshooting and Error Codes

Diagnosing Common Issues

Guide to diagnose and resolve common operational problems.

Understanding Error Codes

Explanation of error codes and their possible causes/solutions.

Parts and Adjustments

Replacement Parts and Component Identification

Information for ordering parts and identifying components.

Temperature and Altitude Adjustments

Procedures for adjusting max/min temperatures and high altitude settings.

Service and Support

Contacting for Service and MA Requirements

Steps for contacting service and specific MA installation rules.

Rheem RTG 64DV Specifications

General IconGeneral
TypeTankless
Fuel TypeNatural Gas
Maximum Flow Rate6.4 GPM
Energy Factor0.82
Weight42 lbs
Warranty12 years
Vent TypeDirect Vent
Thermal Efficiency82%
Maximum BTU140, 000 BTU
Ignition TypeElectronic
VentingPVC

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