Aviditi XFJ180FDCH
Aviditi XFJ180FDCH Tankless Electric Water Heater
Instruction Manual
1. Product Overview
The Aviditi XFJ180FDCH is an 18 kW, 6 GPM tankless electric water heater designed to provide on-demand hot water. Its compact design and advanced features make it suitable for various residential applications, ensuring efficient and continuous hot water supply.
Key features include:
- Unique glossy IMD front cover
- Multi-layer structure heating chamber
- LED widescreen touch display screen
- Adopts patent heating technology
- Electricity leakage protection

Figure 1: Front view of the Aviditi XFJ180FDCH Tankless Electric Water Heater, showing its sleek design and control panel.
2. Safety Information
Please read all safety instructions carefully before installing, operating, or performing maintenance on this appliance. Failure to follow these instructions could result in property damage, serious injury, or death.
- Installation must be performed by a qualified electrician and plumber in accordance with all local and national electrical and plumbing codes.
- Ensure the unit is properly grounded.
- Do not operate the unit if it is damaged or malfunctioning.
- Do not block the water inlet or outlet.
- Turn off power to the unit before performing any maintenance or service.
- This appliance is designed for indoor use only.
3. Installation
Proper installation is crucial for the safe and efficient operation of your tankless water heater. Consult a professional for installation if you are not familiar with electrical and plumbing work.
3.1 Mounting the Unit
Select a suitable location for mounting the unit, ensuring it is protected from freezing temperatures and has adequate clearance for maintenance. Use the integrated mounting bracket on the back of the unit to secure it firmly to a wall.

Figure 2: Back view of the water heater, illustrating the integrated mounting bracket for wall installation.
3.2 Plumbing Connections
Connect the cold water inlet and hot water outlet pipes to the corresponding ports on the bottom of the unit. Ensure all connections are watertight. The unit has a 6-gallon capacity and requires 1/2" NPT water connections.

Figure 3: Bottom view of the water heater, showing the clearly labeled hot water outlet (red) and cold water inlet (blue) connections.
3.3 Electrical Connections
This unit requires a 240 Volt, 18000 Watt electrical supply. It operates on a single phase. Ensure the electrical wiring is correctly sized and protected by an appropriate circuit breaker (refer to specifications for Max. required circuit breaker). The unit features electricity leakage protection.
4. Operating Instructions
Once installed and connected, the unit is ready for operation. The LED widescreen touch display allows for easy temperature adjustment and monitoring.
4.1 Initial Startup
- Ensure all water connections are secure and there are no leaks.
- Open a hot water faucet in your home to allow water to flow through the unit and purge any air from the system.
- Once water flows steadily from the faucet, close the faucet.
- Turn on the electrical power to the unit at the circuit breaker.
4.2 Temperature Adjustment
Use the touch controls on the LED display to set your desired water temperature. The operating temperature range is 86-127 Degrees Fahrenheit. The unit will automatically heat the water to the set temperature as it flows through.
4.3 Flow Rate
The unit is designed for a flow rate of 6 GPM (Gallons Per Minute) or 22.7 L/min. For optimal performance, ensure your water flow meets the minimum activation requirement of 0.92 GPM / 3.5 L/min.
5. Maintenance
Regular maintenance helps ensure the longevity and efficiency of your tankless water heater.
- Descaling: Depending on your water hardness, periodic descaling may be required to remove mineral buildup from the heating elements. Consult a qualified technician for this procedure.
- Cleaning: Keep the exterior of the unit clean with a soft, damp cloth. Do not use abrasive cleaners.
- Inspection: Periodically inspect water connections for any signs of leaks or corrosion.
6. Troubleshooting
If you experience issues with your water heater, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water / Unit not turning on | No power; Water flow too low; Overheat protection activated. | Check circuit breaker; Ensure minimum flow rate is met; Turn off power, wait 15 minutes, then restore power. |
| Water not hot enough | Temperature setting too low; Mineral buildup; Incoming water temperature too cold. | Increase temperature setting; Descale unit (professional recommended); Reduce flow rate if incoming water is very cold. |
| Water leaks | Loose connections; Damaged seals. | Tighten connections; Replace seals (professional recommended). |
If the problem persists, contact customer support.
7. Specifications
Detailed technical specifications for the Aviditi XFJ180FDCH model:
| Specification | Value |
|---|---|
| Manufacturer | Aviditi |
| Part Number | XFJ180FDCH |
| Power Source | Corded Electric |
| Voltage | 240 Volts |
| Wattage | 18000 watts |
| Item Package Quantity | 1 |
| Temperature Range | 86-127 Degrees Fahrenheit |
| Package Dimensions | 46.99 x 36.83 x 13.97 cm; 4.08 kg |
| Product Model Number | XFJ180FDCH |
| ASIN | B0056AWTXU |
| First Available Date | August 21, 2012 |
| Brand | Aviditi |
| Capacity | 6 Gallons |

Figure 4: Technical data table showing various models and their specifications, along with a diagram illustrating the internal components and structure of the water heater.
8. Warranty and Support
Aviditi products are manufactured to high-quality standards and are backed by a limited warranty. Please refer to the warranty card included with your purchase for specific terms and conditions.
For technical assistance, troubleshooting not covered in this manual, or warranty claims, please contact Aviditi customer support through their official website or the contact information provided with your product documentation.
When contacting support, please have your model number (XFJ180FDCH) and purchase date available.