Important Safety Information
Please read all instructions carefully before installation and use. Failure to follow these instructions could result in property damage, personal injury, or death.
- Ensure proper electrical grounding and circuit breaker installation (120V, 30-amp circuit breaker, 10AWG wires required).
- Do not operate the unit if the incoming water temperature is below 60°F (15°C) as it may not provide sufficient heating.
- Verify all water connections are secure to prevent leaks.
- The unit is equipped with overheat protection, dry-heating protection, and electricity leakage protection. Do not bypass these safety features.
- Installation should be performed by a qualified professional if you are unsure about electrical or plumbing work.
- This product is designed for sink use and may not be suitable for high-flow applications like showers.
Product Overview
The WINTEMP KFU135 Tankless Electric Water Heater provides instant hot water on demand, eliminating the need for a bulky storage tank. Its compact design and energy-efficient operation make it an ideal solution for various applications, including kitchens, bathrooms, boats, and food trucks.
- Endless Hot Water: 3500W 120V heating system delivers instant hot water at approximately 73°F (23°C) in seconds.
- Rotatable Digital Display: Unique design with a self-adjusting rotatable digital display for easy temperature monitoring, regardless of mounting orientation.
- Energy Saving: Adjusts power input based on flow rate and temperature settings, achieving up to 99% energy efficiency.
- Compact Design: Mini body (9" x 2.6" x 8.5") allows for flexible installation in tight spaces.
- Safety Certified: ETL and UL approved, featuring overheat, dry-heating, and electricity leakage protection.
Front view of the WINTEMP KFU135 Tankless Electric Water Heater, showing the digital display and control buttons.
What's in the Box
- WINTEMP Tankless Electric Water Heater Unit
- Rubber plug and screw set for mounting
- Operation and Installation instructions manual
- External power cord (Note: Does not come with a plug)
Image showing the water heater unit and included accessories, such as the manual and mounting hardware.
Setup and Installation
Proper installation is crucial for the safe and efficient operation of your tankless water heater. Please follow these steps carefully.
- Choose Location: Select an appropriate wall section for mounting. The unit can be installed horizontally or vertically.
- Mounting: Fix the appliance securely to the wall using the provided screws and rubber plugs.
- Water Connections:
- Connect the water pipe to the water inlet (blue cap) and water outlet (red cap) connections.
- Ensure the rubber seal rings are properly installed to prevent leaks.
- The unit features a standard 1/2" NPT interface, directly connectable to household conventional hose connectors.
- The water inlet is equipped with a filter screen.
- Electrical Connections:
- This unit requires 120 volts, a dedicated 30-amp circuit breaker, and 10AWG wires.
- Connect the red (Live), yellow (Neutral), and black (Earth) wires from the external power cord to the corresponding terminals in the plug joint.
- Securely install the fixer with nails to complete the electrical installation.
- Flush System: Before powering on, open the hot water faucet to allow water to flow through the unit and remove any air from the system. This is critical to prevent dry-heating.
Diagram illustrating the electrical and plumbing connections for installation.
Close-up of the rotatable digital display, highlighting its flexibility for different installation orientations.
Official WINTEMP video demonstrating the installation and operation of the tankless water heater.
Operating Instructions
Once installed and flushed, your WINTEMP tankless water heater is ready for use.
- Power On: Turn on the main power switch connected to the unit. The digital display will illuminate.
- Adjust Temperature: Use the '+' and '-' buttons on the unit to set your desired water temperature. The rotatable digital display will show the current temperature.
- Temperature Unit Conversion: To switch between Fahrenheit (°F) and Celsius (°C), ensure the unit is in OFF mode. Touch and hold the '-' button for 5 seconds.
- Display Orientation: If the unit is installed upside down, you can flip the display orientation. In OFF mode, touch and hold the '+' button for 5 seconds.
- Hot Water On Demand: Open your faucet to initiate hot water flow. The unit will instantly heat the water as it passes through.
The LED digital display allows for easy temperature adjustment and monitoring.
Official WINTEMP video demonstrating the use and operation of the tankless water heater, including display adjustments.
Maintenance
Regular maintenance ensures optimal performance and longevity of your water heater.
- Filter Cleaning: Periodically check and clean the filter screen at the water inlet to prevent debris buildup.
- Exterior Cleaning: Wipe the exterior of the unit with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Leak Inspection: Regularly inspect all water connections for any signs of leaks. Tighten connections if necessary.
- Professional Check: For complex issues or annual checks, it is recommended to consult a qualified technician.
Troubleshooting
If you encounter issues with your water heater, refer to the following common troubleshooting tips:
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water / Unit not turning on | No power; Circuit breaker tripped; Water flow too low; Safety protection activated. | Check power supply and circuit breaker; Ensure sufficient water flow; Reset unit by cycling power; Consult manual for specific error codes. |
| Water not hot enough | Incoming water temperature too low; Flow rate too high; Temperature setting too low; Sediment buildup in filter. | Reduce water flow; Increase temperature setting; Clean water inlet filter; Ensure incoming water temperature is above 60°F (15°C). |
| Water leaks | Loose connections; Damaged seals. | Tighten all water connections; Inspect and replace damaged rubber seals. |
If the problem persists after attempting these solutions, please contact WINTEMP customer support.
Specifications
| Feature | Detail |
|---|---|
| Brand | WINTEMP |
| Model Number | KFU135 (3.5kW) |
| Product Dimensions | 8.5"W x 9"H x 2.6"D |
| Color | Silver |
| Wattage | 3500 watts |
| Voltage | 120 Volts |
| Maximum Flow Rate | 1.2 Gallons Per Minute |
| Maximum Temperature | 131 Degrees Fahrenheit |
| Efficiency | High Efficiency (up to 99%) |
| Mounting Type | Wall |
| Safety Features | Overheat protection, dry-heating protection, electricity leakage protection |
| Certifications | ETL, UL |
| Recommended Wire Size | 10AWG |
| Required Circuit Breaker | 1 x 30-amp |
| Water Interface | Standard 1/2" NPT |
Warranty and Support
The WINTEMP KFU135 Tankless Electric Water Heater comes with a 2-year warranty period.
For any issues during usage, technical assistance, or warranty claims, please contact WINTEMP customer support through your order details on Amazon or refer to the official user manual:
