1. Product Overview
The Rinnai RUR160EP is a condensing tankless hot water heater designed for outdoor propane installation. This unit provides continuous hot water on demand, offering energy efficiency and a compact design. It features Wi-Fi monitoring and recirculation technology for optimized hot water delivery.

Figure 1: Rinnai RUR160EP Tankless Water Heater
This model is designed for outdoor installation and uses propane as its fuel source. It is capable of supplying hot water for multiple fixtures simultaneously.
2. Key Features
- Continuous Hot Water: Provides an endless supply of hot water, heating it only when needed.
- Energy Efficiency: Condensing technology offers high thermal efficiency, reducing energy consumption compared to traditional tank heaters.
- Space-Saving Design: Compact wall-mounted unit frees up valuable floor space.
- ThermaCirc360 Technology: Features a built-in recirculation pump, timer, and thermal bypass valve for faster hot water delivery, even in homes without a dedicated return line.
- Wi-Fi Monitoring: Allows for remote monitoring and control of the unit.
- High Flow Rate: Delivers up to 9 Gallons Per Minute (GPM) of hot water.
- Outdoor Installation: Specifically designed for safe and efficient outdoor use.

Figure 2: Key Features of the Rinnai Tankless Water Heater

Figure 3: Smart Wi-Fi Technology for Remote Control
3. Setup and Installation
The Rinnai RUR160EP is designed for outdoor installation only. Due to the complexity of gas and water line connections, professional installation is strongly recommended to ensure safety, proper operation, and compliance with local codes.
3.1 Site Requirements
- Ensure the installation location is outdoors and provides adequate clearance as specified in the full installation manual.
- The unit requires a propane gas supply. Verify that the gas supply pressure meets the specifications.
- Proper water and gas line connections are crucial.

Figure 4: Outdoor Installation Example
3.2 Initial Startup
After professional installation, follow the startup procedures outlined in the comprehensive Rinnai installation manual. This typically involves purging air from the gas lines and verifying water connections.
4. Operating Instructions
The RUR160EP is designed for user-friendly operation. The front panel features controls for adjusting water temperature and managing recirculation settings.
4.1 Temperature Adjustment
Use the up and down arrow buttons on the unit's control panel to set your desired hot water temperature. The current temperature will be displayed on the digital screen.
4.2 Recirculation Function (ThermaCirc360)
The built-in ThermaCirc360 technology provides faster hot water. This feature can be programmed via the unit's controls or a compatible Wi-Fi module to activate recirculation at specific times or on demand, reducing wait times for hot water.
Video 1: Rinnai RUR ThermaCirc360 Technology Overview
This video explains how the Rinnai ThermaCirc360 technology eliminates waiting for hot water by recirculating it through your pipes, regardless of plumbing configuration. It illustrates how this saves water and time, providing hot water faster from any tap in the house.
4.3 Wi-Fi Monitoring
If equipped with a Wi-Fi module, download the Rinnai app to monitor your water heater's status, adjust settings, and schedule recirculation from your smartphone.
5. Maintenance
Regular maintenance is essential to ensure the longevity and efficient operation of your Rinnai tankless water heater.
5.1 Annual System Flushing
It is recommended to perform an annual system flush to remove mineral buildup and maintain optimal performance. This process involves using the flush ports located at the bottom of the unit. Refer to the full instruction manual for detailed steps or consult a qualified technician.

Figure 5: Pressure Relief and Isolation Valves for Maintenance
5.2 General Inspection
Periodically inspect the unit for any visible signs of leaks, damage, or unusual noises. Ensure the area around the unit is clear of obstructions.
6. Troubleshooting
If you encounter issues with your Rinnai RUR160EP, consult the troubleshooting section of the complete owner's manual. Common issues and their solutions are typically provided. For complex problems, contact Rinnai customer support or a certified technician.
6.1 Common Issues
- No Hot Water: Check power supply, gas supply, and ensure the unit is turned on. Verify temperature settings.
- Inconsistent Water Temperature: May indicate mineral buildup (requiring flushing) or issues with water flow.
- Error Codes: Refer to the manual for specific error code meanings and recommended actions.
7. Specifications
| Specification | Value |
|---|---|
| Brand | Rinnai |
| Model Number | RUR160EP |
| Product Dimensions | 22.05"W x 36.86"H x 12.0"D (305 mm) |
| Fuel Type | Propane Gas |
| Max Flow Rate | 9 GPM |
| Heat Output | 46889.9 Watts |
| Efficiency | High Efficiency |
| Mounting Type | Outdoor Installation (Wall Mounted) |
| Item Weight | 80.9 pounds |
| Voltage | 120 Volts |
| UPC | 766156009525 |

Figure 6: Groundwater Temperature Impact on Flow Rate
Note: This model (RUR160EP) has been discontinued. Please see the newer model RSC160eP for current offerings.

Figure 7: Comparison of RUR160EP and Newer RSC160eP Model
8. Warranty and Support
Rinnai provides comprehensive warranty coverage for the RUR160EP model:
- Heat Exchanger: 15-year residential warranty.
- Labor: 5-year residential warranty.
- Parts: 1-year residential warranty.
For technical support, service, or to obtain a copy of the full instruction manual, please contact Rinnai customer service.
Video 2: Benefits of Rinnai Tankless Water Heaters
This video highlights four compelling reasons to switch to a tankless water heater: space saving, energy efficiency, endless hot water, and longevity. It visually compares the compact size of tankless units to traditional tank heaters and explains the benefits.
9. Important Safety Information
Always adhere to all local and national codes for gas and water appliance installation and operation. Failure to do so can result in property damage, serious injury, or death.
- Gas Safety: Ensure proper ventilation and gas line connections. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
- Water Pressure: The water heater is provided with a pressure relief valve. Ensure its safe operation by installing it in a suitable place where it will not cause damage if discharged.
- Toxic Chemicals: Do not use toxic chemicals, such as those used for boiler treatment in potable water heating systems used for space heat.
- Professional Installation: This appliance must be installed in accordance with local codes and the manufacturer's instructions.





