1. Introduction and Overview
The Rheem Prestige RTGH-RH11DVLN is a high-efficiency condensing indoor natural gas tankless water heater designed to provide continuous hot water. This unit features a built-in recirculation pump with auto-learning programming, ensuring hot water is available when needed while optimizing energy use. It boasts an industry-leading low flow activation rate of 0.50 GPM and an Ultra Low NOx burner that meets SCAQMD rule requirements for low emissions. Additional safety features include a flame sensor, overheat cut-off switch, gas and water leak detectors, and exhaust and water temperature sensors.
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Rheem Prestige tankless water heater.
2. Safety Information
WARNING: Proposition 65 - This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Always ensure professional installation for this unit. Failure to do so may void the warranty and pose safety risks. Observe all local and national plumbing and electrical codes.
- Flame Sensor: Monitors the burner flame for safe operation.
- Overheat Cut-off Switch: Automatically shuts down the unit if water temperature exceeds safe limits.
- Gas and Water Leak Detectors: Provides early detection of leaks to prevent damage and hazards.
- Exhaust and Water Temperature Sensors: Continuously monitor temperatures for optimal performance and safety.
3. Product Features
- Continuous Hot Water: Provides an endless supply of hot water without the wait.
- Low Operating Cost: Achieves high energy efficiency and water savings through advanced design.
- Space Savings: Compact, space-saving design, ideal for replacing traditional tank water heaters.
- Water & Gas Leak Detection: Automatically shuts down the unit and provides an error code upon detecting leaks.
- Auto-Learn Programming: Tracks water usage over time and automatically programs to meet hot water demands during peak periods.
- High Efficiency: 0.94 UEF (0.96 EF Canada) with 199,000 BTU heat output.
- Flexible Venting: Vents up to 100’ with 3” PVC or up to 50’ with 2” PVC pipe.
4. Specifications
| Specification | Detail |
|---|---|
| Brand | Rheem |
| Model Number | RTGH-RH11DVLN |
| Color | Gray |
| Voltage | 120 Volts |
| Maximum Flow Rate | 11 Gallons Per Minute |
| Heat Output | 199,000 British Thermal Units |
| Efficiency | 0.94 UEF (0.96 EF Canada) |
| Maximum Operating Pressure | 150 PSI |
| Mounting Type | Wall Mount (Note: Specifications also list 'floor mount', but product images and common practice for tankless units suggest wall mount is primary.) |
| Is Electric | No (Gas unit) |
| Item Weight | 61.9 pounds |
| Product Dimensions | 14.8 x 17.3 x 28.7 inches |
| Finish | Stainless Steel |
| Installation Method | Wall Mount |
| Certification | Energy Star |
| Usage | Indoor |
| Included Components | Professional Condensing Tankless Gas Water Heater |
5. Installation Guidelines
Professional installation is required for this water heater to ensure safety, proper operation, and warranty validity. Consult a qualified plumber and HVAC technician.
- Venting: Ensure proper venting is installed. This unit supports PVC or stainless steel exhaust venting. Refer to local codes for maximum vent run lengths (up to 100’ with 3” PVC or 50’ with 2” PVC).
- Gas Line: A 3/4-inch natural gas line is recommended for optimal performance. Ensure adequate gas supply to meet the unit's BTU requirements.
- Electrical Connection: An electrical outlet is required to power the unit's electronic components.
- Mounting: Securely mount the unit to a sturdy wall using appropriate mounting hardware. Consider installing a mounting board for stability.
- Water Connections: Install an inline filter on the water inlet to protect the unit from debris. Ensure proper shut-off valves are installed on both hot and cold water lines for maintenance.
- Drainage: The system requires proper drainage for condensate and pressure relief. Ensure a drainage port is connected to an appropriate drain.
6. Operating Instructions
The Rheem Prestige RTGH-RH11DVLN is designed for user-friendly operation. Once professionally installed, the unit will automatically provide hot water on demand.
- Continuous Hot Water: The unit heats water as it flows through, providing a continuous supply.
- Auto-Learn Recirculation: The built-in recirculation pump learns your hot water usage patterns over time and activates recirculation cycles to ensure hot water is readily available when typically needed, reducing wait times and conserving energy.
- Temperature Adjustment: Refer to the unit's display and controls for adjusting the desired hot water temperature.
7. Maintenance
Regular maintenance is crucial for the longevity and efficient operation of your tankless water heater.
- Inline Filter Cleaning/Replacement: The inline filter helps prevent debris from entering the unit. Periodically inspect and clean or replace the filter as needed.
- Flushing the System: To prevent mineral buildup (scaling), it is recommended to flush the unit with a cleaning solution (e.g., vinegar) at least twice a year, or more frequently depending on water hardness. This involves isolating the unit, connecting a pump to circulate the solution through the heat exchanger, and then flushing with fresh water.
- Professional Inspection: Schedule annual inspections by a qualified technician to ensure all components are functioning correctly and to address any potential issues.
8. Troubleshooting
The unit may display error codes if an issue arises. Refer to the physical instruction manual provided with the unit for a comprehensive list of error codes and their corresponding remedies. Common issues may include:
- Error Codes: If an error code appears on the display, consult the manual to identify the problem and recommended solution. Often, resetting the unit by cycling power off and on can resolve minor errors.
- No Hot Water: Check the gas supply, electrical connection, and ensure no error codes are displayed. Verify water flow and pressure.
- Insufficient Hot Water: This can occur if the unit's capacity is exceeded, especially in colder climates or with multiple simultaneous hot water demands. Ensure the unit's BTU rating is appropriate for your household's needs.
- Leaks: If water or gas leaks are detected, immediately shut off the water and gas supply to the unit and contact a professional technician.
9. Warranty and Support
The Rheem Prestige RTGH-RH11DVLN tankless water heater comes with the following warranty:
- Heat Exchanger: 25 years for residential applications, 18 years for commercial applications.
- Parts: 5 years.
- Labor: 1 year.
Please note that professional installation is required for the warranty to be valid. For technical support, service, or warranty claims, please contact Rheem customer service or visit the official Rheem website.
10. Product Images
11. Product Videos
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