1. Overview
This manual provides essential information for the safe and efficient operation of your BreeRainz 18L Tankless Propane Water Heater. Please read all instructions carefully before installation and use.
The BreeRainz 18L Tankless Propane Water Heater is designed to provide continuous hot water. It features a 4 x 20-inch burner design with 100% pure copper pipes, enabling rapid heating to deliver 18 liters per minute (LPM) of hot water at a 25°C temperature rise within approximately 2.5 seconds.

The BreeRainz tankless water heater provides hot water quickly, with a rated heat load of 36KW and a capacity of 18LPM.

Internal components of the water heater, including the exhaust chamber, 100% pure copper tubes, 4 rows of burners, double igniters, hot water outlet, cold water inlet, and gas inlet.
The unit is suitable for various applications, including kitchen sinks, bathroom sinks, and pet showers, providing hot water for multiple points of use.

The water heater can provide hot water for multiple household needs simultaneously.
2. Safety Information
Your safety is paramount. This appliance incorporates multiple safety features. Always adhere to local codes and regulations for installation and operation.
- Built-in Pressure Relief Valve: Automatically releases excess pressure if incoming water pressure exceeds safe limits, preventing potential damage to the unit or piping.
- Smart Timer for Safety Assurance: Equipped with a 20-minute smart timer, the system will automatically prompt and enter standby mode after 20 minutes of continuous operation. This duration is designed to allow for typical usage while providing a safety measure.
- Anti-Freeze Protection: Helps prevent damage in cold environments.
- Over-Heat Protection: Shuts down the unit if temperatures become too high.
- Dry Combustion Protection: Prevents operation without water flow.
- Low Water Pressure Protection: Ensures the unit does not operate under insufficient water pressure.
- Automatic Flameout Protection: Detects and addresses flame failures.

The water heater is equipped with comprehensive safety features for user protection.
3. Setup and Installation
This water heater is designed for wall mounting. Ensure the installation location is well-ventilated and protected from the elements if installed outdoors. A 110V power supply is required for the electronic ignition and control panel.
3.1 Mounting
The unit features prefabricated installation slots for wall-mounting. Securely attach the unit to a sturdy wall surface using appropriate fasteners.

The unit features a stainless steel housing and wall-mount installation slots. An 11cm/4.3 inch exhaust outlet is present for proper ventilation.
3.2 Connections
Connect the cold water inlet, hot water outlet, and gas inlet as follows:
- Connect the blue water pipe to the cold water inlet.
- Connect the red hose to the hot water outlet.
- Connect the yellow gas pipe to the gas inlet.
Ensure all connections are tight and leak-free. Use appropriate sealant tape for threaded connections.
Video demonstrating the connection of water and gas pipes to the tankless water heater.
Video showing the unboxing and connection points of a similar propane tankless water heater.
Preview video demonstrating the outdoor setup and quick connections of a portable tankless water heater.
4. Operating Instructions
The water heater is equipped with a user-friendly control panel for temperature and flow adjustments.
4.1 Control Dials
The unit features three independent dials for precise control:
- Seasonal Switch (Winter/Summer): Adjusts the number of active burners to optimize energy consumption based on ambient temperature. In summer mode, fewer burners are used to save energy.
- Gas Flow Adjustment: Controls the gas supply to the burners, influencing the heating intensity.
- Hot Water Flow Control: Regulates the water flow rate, allowing for higher temperatures at lower flow rates.
A clear LED digital display shows the current water temperature, allowing for easy monitoring and adjustment even with wet hands.

The control panel features a seasonal switch, gas regulator, and water regulator knobs, along with a digital temperature display.
4.2 Intelligent Combustion System
The segmented combustion control system intelligently adjusts the number of burners based on water usage, ensuring stable and precise temperatures while minimizing gas waste. This system maintains temperature variance within ±1°C.

The main unit of the BreeRainz 18L Tankless Propane Water Heater.
5. Maintenance
Regular maintenance ensures optimal performance and longevity of your water heater.
- Regular Cleaning: Keep the exterior of the unit clean. Avoid using abrasive cleaners.
- Check Connections: Periodically inspect all water and gas connections for leaks or corrosion.
- Ventilation: Ensure the exhaust outlet is clear of obstructions for proper ventilation.
- Descaling: Depending on water hardness, periodic descaling may be necessary to prevent mineral buildup in the heat exchanger. Consult a qualified technician for this procedure.
- Winterization: If the unit is installed in an area subject to freezing temperatures and will not be used for an extended period, proper winterization procedures (draining water lines) must be followed to prevent freeze damage.
6. Troubleshooting
If you encounter issues, refer to the following common troubleshooting steps:
- No Hot Water:
- Check gas supply: Ensure the propane tank has fuel and the valve is open.
- Check water flow: Verify adequate water pressure and flow. The unit requires a super low 1.2 PSI water pressure to activate.
- Check power supply: Ensure the 110V plug is securely connected and receiving power.
- Review error codes: The LED display may show an error code. Refer to the full user manual for specific code meanings.
- Inconsistent Temperature:
- Adjust gas and water flow dials: Fine-tune settings to achieve desired stable temperature.
- Check for blockages: Ensure water inlet filters are clean and pipes are not blocked.
- Unit Shuts Off:
- Smart Timer: The 20-minute timer may have activated. Restart the unit if continuous operation is needed.
- Safety Protections: Over-heat, low water pressure, or flameout protection may have engaged. Address the underlying cause before restarting.
For persistent issues, contact customer support or a qualified technician.
7. Specifications
| Feature | Specification |
|---|---|
| Brand | BreeRainz |
| Model Number | JSD36-18L |
| Capacity | 18 Liters Per Minute (LPM) |
| Power Source | Liquid Propane |
| Heat Output / Wattage | 36 Kilowatts (KW) |
| Efficiency | 86% |
| Product Dimensions (W x H x D) | 39W x 59H x 15D Centimetres |
| Item Weight | 16 Pounds |
| Maximum Pressure | 2.8 Kilopascal (118 PSI) |
| Mount Type | Wall |
| Special Features | Fast Heating, Portable |
| Included Components | Propane Water Heater w/ 110V Plug |

Energy efficiency rating for the water heater.
8. Warranty and Support
For warranty information, product support, or to purchase replacement parts, please refer to the contact details provided in your product packaging or visit the official BreeRainz website. Keep your purchase receipt for warranty claims.