1. Product Overview
This manual provides essential information for the safe and efficient operation of your Ranein 2025 GEN II Natural Gas Tankless Water Heater, Model RHO19K-NG. This outdoor unit delivers continuous hot water with a maximum flow rate of 8.5 GPM and a heating capacity of 190,000 BTU, suitable for households requiring 4-6 hot water taps.
Image 1.1: Ranein 2025 GEN II Natural Gas Tankless Water Heater with its remote control unit.
Key Features:
- High-Efficiency Output: Max 8.5 GPM and 190,000 BTU for continuous hot water.
- Stable Temperature Control: Advanced technology ensures consistent water temperature by automatically adjusting flow and heat.
- Outdoor Safety Blower: Bottom-mounted blower prevents smoke backflow and adjusts speed for optimal combustion and safety.
- Energy-Saving Design: Oxygen-free copper tank minimizes heat loss, heating water on demand to reduce energy consumption.
- Compact Wall-Mount: Space-saving design for outdoor installation with standard 3/4" NPT ports.
2. Safety Information
Read all safety warnings and instructions carefully before installing or operating this appliance. Failure to follow these instructions may result in property damage, personal injury, or death.
General Safety Precautions:
- This appliance is designed for outdoor use only.
- Installation should be performed by a qualified technician in accordance with local codes and regulations.
- Do not install this unit above 2,000 feet elevation, as performance may be affected.
- Ensure proper ventilation around the unit as specified in the installation guide.
- In cold outdoor weather, open the pressure relief valve to drain any remaining water from the unit to prevent freezing and damage.
Integrated Safety Features:
The Ranein tankless water heater incorporates multiple protection mechanisms for user safety:
- Flame Out Protection
- Overheating Protection
- Dry Burning Protection
- Over Temperature Protection
- Timeout Protection
- Pipe Blockage Protection
- High Temperature Lock Protection
- Excessive Air Pressure Protection
Image 2.1: Overview of the 2+8 product protection features, including flame out, overheating, and dry burning protection.
3. Setup and Installation
Proper installation is crucial for the performance and safety of your tankless water heater. It is strongly recommended that installation be performed by a qualified and licensed professional.
Installation Considerations:
- Location: This unit is designed for outdoor installation. Choose a location that is protected from direct impact and allows for adequate clearance for maintenance.
- Mounting: The unit is wall-mounted to save space. Ensure the mounting surface is structurally sound to support the unit's weight (approximately 48.9 pounds).
- Connections: The unit features standard 3/4" NPT ports for water inlet, water outlet, and gas inlet. Ensure all connections are secure and leak-free.
- Gas Supply: Verify that the natural gas supply pressure meets the specified requirements (2800Pa/2000Pa).
- Electrical Supply: The unit requires an AC110V/60Hz rated voltage supply.
Image 3.1: Detailed view of the water heater's dimensions and connection points for water and gas.
Pre-Installation Checklist:
- Confirm the unit type (Natural Gas) matches your home's gas supply.
- Ensure all necessary tools and materials are available.
- Verify that the installation site meets all local building and safety codes.
- Inspect the unit for any shipping damage before installation.
4. Operating Instructions
Your Ranein tankless water heater is designed for user-friendly operation, providing instant and consistent hot water.
Initial Startup:
- After installation, ensure all gas and water lines are open and free of leaks.
- Turn on the electrical power to the unit.
- Open a hot water faucet in your home to allow water to flow through the unit. The heater will automatically detect water flow and ignite.
- Check the LED control panel for proper operation and temperature display.
Temperature Control:
The unit features an LED temperature control panel for precise temperature adjustment. You can set your desired hot water temperature within the range of 95°F to 149°F.
Image 4.1: The LED control panel displays output temperature, set temperature, and error codes.
Water and Gas Dual-Adjustment Technology:
This technology continuously monitors and adjusts both water flow and gas combustion levels to maintain a stable output water temperature, even with varying inlet water temperatures or flow rates.
Image 4.2: Graph demonstrating the consistent hot water temperature provided by the Ranein system.
Quiet Operation:
The sealed combustion structure and advanced fan design contribute to a quiet operation, minimizing noise during ignition and continuous use.
Image 4.3: Visual representation of the quiet operation of the Ranein tankless water heater.
5. Maintenance
Regular maintenance ensures the longevity and optimal performance of your Ranein tankless water heater.
Routine Checks:
- Visual Inspection: Periodically inspect the unit for any signs of leaks, corrosion, or damage to the casing or connections.
- Ventilation: Ensure that the area around the unit remains clear of obstructions to allow for proper airflow.
- Water Drainage (Cold Weather): During periods of cold outdoor temperatures, it is essential to drain any remaining water from the unit by opening the pressure relief valve. This prevents potential damage from freezing.
Professional Servicing:
It is recommended to have the unit inspected and serviced by a qualified technician annually. This includes checking the heat exchanger, burner, and all safety components.
Image 5.1: The oxygen-free copper heat exchanger is designed for efficient heat transfer and resistance to corrosion.
6. Troubleshooting
This section provides solutions to common issues you might encounter. For problems not listed here, or if issues persist, please contact Ranein customer support.
Common Issues and Solutions:
- No Hot Water:
- Check if the gas supply is open.
- Ensure the water supply is turned on.
- Verify electrical power to the unit.
- Check the LED panel for any error codes.
- Inconsistent Water Temperature:
- Ensure the water pressure is within the specified range (0.025 ~ 0.8MPa).
- Confirm that the gas pressure is adequate.
- Avoid excessive simultaneous hot water demands that exceed the unit's capacity.
- Unit Not Igniting:
- Check for proper gas supply.
- Listen for the sound of the igniter. If no sound, check electrical connections.
- Refer to the LED panel for specific error codes related to ignition failure.
- Error Codes Displayed:
- Consult the full user manual (if available) for a comprehensive list of error codes and their corresponding troubleshooting steps.
- If the code persists after basic troubleshooting, contact Ranein customer support.
7. Specifications
| Specification | Detail |
|---|---|
| Brand | Ranein |
| Model Number | RHO19K-NG |
| Fuel Type | Natural Gas |
| Max Flow Rate | 8.5 GPM |
| Heating Capacity | 190,000 BTU |
| Installation Type | Outdoor, Wall-Mount |
| Product Dimensions | 18.11 x 18.11 x 12.99 inches |
| Item Weight | 48.9 pounds |
| Color | Gray |
| Water Pressure Range | 0.025 ~ 0.8 MPa |
| Gas Pressure | 2800Pa/2000Pa |
| Rated Voltage | AC110V/60Hz |
| Temperature Rise Range | 95°F - 149°F |
| Water Inlet/Outlet Ports | NPT 3/4" |
| Gas Inlet Port | NPT 3/4" |
| Included Components | Water heater |
8. Warranty and Support
Ranein is committed to providing reliable products and excellent customer service.
Warranty Information:
- Your Ranein tankless water heater comes with a 2-year warranty against manufacturing defects.
- This warranty includes 2 years of free service for covered issues.
Customer Support:
For any product issues, technical assistance, or warranty claims, please contact Ranein customer support:
- Email: service@ranein.net
- US Phone: (424)-452-2630
Image 8.1: Ranein Service Support details, including email and phone number.
