Introduction
The Rinnai RE199iN Non-Condensing Natural Gas Tankless Water Heater provides efficient, on-demand hot water for your home. This unit heats water only when needed, reducing standby energy loss compared to traditional tank water heaters. Its compact, wall-mounted design saves space, and the integrated LED display offers diagnostic codes and service reminders for simplified maintenance.
This manual provides essential information for the safe and effective use of your Rinnai tankless water heater, covering installation, operation, maintenance, and troubleshooting.
Figure 1: Front view of the Rinnai RE199iN Tankless Water Heater.
Setup and Installation
The Rinnai RE199iN is designed for indoor installation with proper venting. Professional installation by a qualified technician is strongly recommended to ensure safe gas line connection, adherence to local codes, optimal performance, and full warranty protection. Refer to the detailed installation instructions provided with your unit for specific requirements.
Consider your home's hot water demands and local groundwater temperatures when determining the best placement and sizing for your unit. Rinnai provides sizing guides and groundwater temperature maps to assist with this process.
Figure 2: Example of an indoor Rinnai tankless water heater installation.
Figure 3: Space-saving design of a tankless water heater compared to a traditional tank unit.
Figure 4: Groundwater Temperature Map and Flow Rate Guide for optimal sizing.
Installation Video: Features & Benefits
Video 1: An official Rinnai video highlighting the features and benefits of their tankless water heaters, including installation aspects.
Product Overview Video
Video 2: A brief 360-degree view of the Rinnai RE/REP tankless water heater, showcasing its design and connections.
Operating Instructions
Your Rinnai RE199iN water heater provides hot water on demand. The unit features an LED display for easy temperature adjustment and monitoring. The default temperature setting is typically 120°F (49°C), which is suitable for most household needs and helps prevent scalding.
- Temperature Adjustment: Use the up and down arrows on the LED display to set your desired hot water temperature. The maximum temperature is 140°F (60°C).
- On/Off Function: The unit can be turned on or off using the dedicated button on the display.
- Priority Mode: If available, the priority button allows you to prioritize hot water delivery to a specific fixture or zone.
- Smart Home Integration: For enhanced control and monitoring, the Rinnai Controlr module (sold separately) enables WiFi connectivity and smart home integration.
Figure 5: LED control panel for temperature and settings.
Maintenance
Regular maintenance ensures the longevity and efficiency of your Rinnai tankless water heater. The LED display will provide service reminders to prompt necessary actions. Key maintenance tasks include:
- Annual Descaling: To prevent mineral buildup, it is recommended to descale the unit annually, especially in areas with hard water. This process involves circulating a descaling solution through the heat exchanger.
- Ventilation Inspection: Periodically inspect the ventilation system for any obstructions or damage.
- General Cleaning: Keep the exterior of the unit clean and free from dust and debris.
Always consult the full product manual for detailed maintenance procedures or contact a qualified service technician.
Figure 6: Tankless units offer extended lifespan with proper maintenance.
Troubleshooting
The Rinnai RE199iN is equipped with an LED display that shows diagnostic codes in case of an operational issue. These codes help identify the problem quickly. Refer to the troubleshooting section in your comprehensive product manual for a list of codes and their corresponding solutions.
Common issues and initial steps:
- No Hot Water: Check the power supply, gas supply, and ensure the unit is turned on. Verify the temperature setting.
- Fluctuating Temperature: This can be caused by low water flow or mineral buildup. Check water flow rates and consider descaling.
- Error Codes: Note the specific code displayed and consult your manual. If the issue persists, contact a certified Rinnai technician.
For complex problems or if you are unsure about a diagnostic code, always contact a qualified professional for assistance.
Specifications
The Rinnai RE199iN Non-Condensing Natural Gas Tankless Water Heater offers robust performance and features:
| Feature | Specification |
|---|---|
| Brand | Rinnai |
| Model Number | REU-VE2737FFD-US-N |
| Power Source | Natural Gas |
| Heat Output | 199,000 BTU |
| Flow Rate | 9.8 Gallons Per Minute (GPM) |
| Maximum Temperature | 140 Degrees Fahrenheit |
| Product Dimensions (W x H) | 14.05"W x 27.28"H |
| Item Weight | 52.1 Pounds |
| Mount Type | Wall |
| Special Features | LED Display, Smart Home Compatible (with optional Controlr module) |
Figure 7: Model comparison and key specifications.
Figure 8: Exterior dimensions of the Rinnai Non-Condensing unit.
Warranty Information
The Rinnai RE199iN Tankless Water Heater is built for residential performance and includes a comprehensive warranty:
- Heat Exchanger: 15-year limited warranty
- Parts: 5-year limited warranty
- Labor: 1-year limited warranty
Please retain your proof of purchase and installation records for warranty claims. For full terms and conditions, refer to the warranty document included with your product or visit the official Rinnai website.
Support
For technical assistance, service inquiries, or to purchase accessories like the Rinnai Controlr module for WiFi connectivity, please contact Rinnai customer support. You can find contact information on the official Rinnai website or in your product packaging.
Rinnai is dedicated to providing high-quality, safe, and efficient appliances. Our customer support team is available to assist you with any questions or concerns regarding your tankless water heater.