Ranein Natural Gas Tankless Water Heater (Outdoor)

1. Safety Information

Read all instructions thoroughly before installation and operation. Failure to follow these instructions could result in property damage, personal injury, or death. Keep this manual for future reference.

1.1 General Safety

• This appliance must be installed by a qualified professional in accordance with all local codes and regulations.
• Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
• Ensure the installation area is clear of combustible materials.

1.2 Gas Safety

• This unit is designed for Natural Gas only. Do not attempt to convert or use with other gas types.
• Verify gas pressure meets specifications (2800Pa/2000Pa).
• If you smell gas, immediately shut off the gas supply, open windows, and evacuate the area. Do not operate electrical switches or phones. Contact your gas supplier.

1.3 Electrical Safety

• The unit requires a 120V AC power supply. Ensure proper grounding.
• Disconnect power before performing any service or maintenance.

1.4 Water Temperature Safety

• Hot water can cause severe burns. Set the temperature to a safe level, typically below 120°F (49°C) to prevent scalding.
• The maximum temperature setting is 149°F (65°C). Exercise caution at higher settings.

1.5 Cold Weather Considerations

• This unit includes Anti-Freeze Protection. However, in extremely cold conditions or if the unit is not used for an extended period, it is recommended to drain the water heater to prevent freezing and potential damage. Refer to the Maintenance section for draining instructions.
• Not recommended for areas over 2,000 feet in elevation without consulting a professional.

2. Product Overview

2.1 Key Features

• Bottom-Placed Fans: Designed for enhanced safety and efficient combustion, preventing smoke backflow. The blower automatically adjusts speed based on external wind pressure and water temperature to ensure complete combustion and longer service life.
• Instant Hot Water: Provides continuous hot water on demand, eliminating the preheating wait time associated with traditional tank water heaters.
• High Capacity: Features 190,000 BTU heating capacity and a maximum flow rate of 7.4 GPM, suitable for supplying 4-6 outlet points simultaneously.
• Anti-Freeze Protection: Integrated system to prevent internal freezing and cracking of the water heater components.
• Compact Design: With dimensions of 24.3"L x 15"W x 8.3"H, the unit occupies minimal space.

2.2 Components Included

• Ranein Tankless Water Heater x1
• Wired Digital Controller x1
• Instruction Manual x1

2.3 Product Diagram

Front view of the Ranein tankless water heater, showing the main unit and the wired digital controller. The unit is gray with the Ranein logo and ventilation grilles.

This diagram highlights key advantages including the bottom fan for complete combustion, sectional fire row for efficiency, and a heat exchanger for better heat conduction.

An internal view showing components like oxygen-free copper for better thermal conductivity, closed combustion for stability, and bottom-placed fans for complete combustion, contributing to safer and longer operation.

This image illustrates the Ranein tankless water heater's capacity (7.4 GPM, 190,000 BTU) and its suitability for 4-6 outlet points in single-family homes and townhouses.

3. Installation

Installation must be performed by a qualified professional. Ensure all local codes and regulations are followed.

3.1 Pre-Installation Checklist

• Gas Type: Confirm your gas supply is Natural Gas. This unit is not compatible with Propane.
• Location: Select an outdoor location that is protected from direct impact and allows for proper ventilation.
• Water Pressure: Ensure incoming water pressure is within the range of 0.025 ~ 0.8 MPa.
• Gas Pressure: Verify gas pressure is 2800Pa/2000Pa.
• Electrical Supply: A dedicated 120V AC, 60Hz electrical outlet is required.
• Tools & Materials: Gather necessary tools and materials, including standard 3/4" NPT water inlet fittings and gas connection components.

3.2 Mounting the Unit

1. Choose a sturdy wall capable of supporting the unit's weight (approximately 49 pounds).
2. Mark the mounting points according to the unit's dimensions and mounting bracket.
3. Securely fasten the mounting bracket to the wall.
4. Carefully lift and hang the water heater onto the bracket.

An image depicting the Ranein tankless water heater mounted on an exterior wall of a building, suggesting its outdoor installation capability. Rain is visible, indicating weather resistance.

3.3 Water Connections

1. Connect the cold water supply line to the 3/4" NPT water inlet.
2. Connect the hot water outlet line to the 3/4" NPT water outlet.
3. Ensure all connections are tight and leak-free.

3.4 Gas Connection

1. Connect the natural gas supply line to the 3/4" NPT gas inlet.
2. Use appropriate gas-rated sealant on all threaded connections.
3. Test all gas connections for leaks using a soap solution.

3.5 Electrical Connection

1. Plug the unit's power cord into a grounded 120V AC, 60Hz electrical outlet.

3.6 Digital Controller Installation

1. Mount the wired digital controller in a convenient indoor location.
2. Connect the controller cable to the designated port on the water heater.

A detailed view of the Ranein wired digital controller, displaying '108°F' as the output temperature. Buttons for adjusting settings and viewing error codes are visible, along with icons for bathroom, kitchen, living room, and basement, indicating remote control capabilities.

4. Operating Instructions

4.1 Initial Startup

1. Ensure all water and gas connections are secure and leak-free.
2. Open the main water supply valve to the unit.
3. Open a hot water faucet in your home to purge air from the water lines. Close the faucet once water flows steadily.
4. Turn on the gas supply to the unit.
5. Connect the unit to the electrical power supply. The digital controller should illuminate.
6. The unit will perform a self-check. Once complete, it is ready for operation.

4.2 Setting Water Temperature

• Use the wired digital controller to adjust the desired hot water temperature.
• The adjustable temperature range is typically 95°F (35°C) to 149°F (65°C).
• For safety, it is recommended to set the temperature below 120°F (49°C) to prevent scalding, especially in households with children or elderly individuals.

4.3 Understanding the Digital Display

The digital controller displays important information:

• Output Temp: Current temperature of the hot water being delivered.
• Set Temp: The desired temperature you have selected.
• Error Code: Displays specific codes if a malfunction occurs. Refer to the Troubleshooting section for details.

4.4 Anti-Freeze Function

The unit is equipped with an automatic anti-freeze protection system. This system activates when ambient temperatures drop to prevent water inside the unit from freezing. However, in prolonged periods of extreme cold or if the unit is powered off, manual draining is recommended as a precautionary measure.

5. Maintenance

Regular maintenance ensures optimal performance and extends the lifespan of your water heater. Always disconnect power and shut off gas and water supplies before performing maintenance.

5.1 Regular Cleaning

• Periodically clean the exterior of the unit with a soft, damp cloth. Do not use abrasive cleaners or solvents.
• Ensure the air intake and exhaust vents are clear of obstructions (e.g., leaves, debris).

5.2 Draining the Unit (for Cold Weather or Extended Non-Use)

If the water heater will not be used for a long period, especially in cold weather, draining the unit is crucial to prevent freezing damage:

1. Turn off the gas supply to the water heater.
2. Turn off the cold water supply valve to the water heater.
3. Open a hot water faucet in your home to relieve pressure.
4. Locate and open the pressure relief valve on the water heater to drain the remaining water.
5. Disconnect the power supply to the unit.

5.3 Professional Inspection

It is recommended to have a qualified technician inspect the water heater annually to ensure all components are functioning correctly and to perform any necessary descaling or adjustments.

6. Troubleshooting

Before contacting customer support, review the following common issues and solutions.

6.1 Contact Support

If you are unable to resolve an issue using the troubleshooting guide, please contact Ranein customer support for assistance.

7. Specifications

A technical diagram illustrating the Ranein tankless water heater with key specifications such as 190,000 BTU, 7.4 GPM, dimensions (24.3"H x 15"W x 8.3"D), water pressure range, gas pressure, rated voltage, and temperature rise range. It also labels the water outlet, water inlet, and gas inlet.

8. Warranty and Support

8.1 Warranty Information

This Ranein Tankless Water Heater comes with a 2-year service warranty. Please retain your proof of purchase for warranty claims.

8.2 Customer Support

For technical assistance, troubleshooting, or warranty inquiries, please contact Ranein customer support. You can find more information and contact details on the official Ranein store page:

Visit the Ranein Store on Amazon