1. Introduction
This manual provides essential information for the safe and efficient operation of your xwdzswgs 110V 3000W Electric Tankless Water Heater. This compact, instant water heater is designed to provide on-demand hot water for various applications such as kitchens, bathrooms, RVs, and camping. Please read these instructions thoroughly before installation and use, and retain them for future reference.

Figure 1: The xwdzswgs 110V 3000W Electric Tankless Water Heater, a compact unit with a digital display and power cord, accompanied by mounting screws and anchors.
2. Safety Information
Your safety is paramount. This water heater incorporates multiple protection functions to ensure reliable operation. Adhere to all safety guidelines during installation and use.
- IPX4 Waterproof: Designed to withstand water splashes from any direction.
- Leakage Protection: Built-in mechanisms to prevent electrical leakage.
- Dry-Burning Protection: Automatically shuts off if water flow is insufficient to prevent damage.
- Automatic Power-off: Unit powers off automatically in over-temperature or inactive states.
- Electrical Connection: Recommended to be connected with wires with a cross-sectional area of ≥ 2.5 square millimeters and to trip switches of over 32A for safe operation.

Figure 2: Visual representation of the multiple safety features including instant heating, overheat protection, IPX4 waterproof rating, leakage protection, automatic power-off, and dry combustion protection.
3. Product Features
Experience instant hot water with the advanced features of your tankless water heater:
- Instant Heating: Provides hot water in 3-5 seconds, eliminating waiting times.
- Digital Display & Touch Control: LED display shows water temperature, easily adjustable with touch controls.
- Adjustable Temperature: Can raise water temperature from 82°F (28°C) to 131°F (55°C).
- Compact & Lightweight Design: Ideal for installation under sinks in small spaces.
- Energy Efficient: Heats water on demand, reducing standby energy loss compared to tank heaters.
- Durable Construction: Features a sturdy ABS shell for longevity.
- Universal Interface: Equipped with 1/2 inch NPT standard interface for easy connection.

Figure 3: A comparison highlighting the advantages of tankless water heaters over traditional tank water heaters, emphasizing compact size, unlimited hot water, adjustable temperature, and instant heating for energy conservation.

Figure 4: Illustrates key benefits such as endless hot water, easy installation, efficient heating element, energy efficiency, robust security protection, low consumption, and available after-sales service.

Figure 5: Highlights features contributing to constant temperature safety, including 98% thermal efficiency, 24-hour insulation, sturdy ABS shell, and digital display with touch control. Also shows various applications like washing dishes, hands, hair, and bathing.

Figure 6: Details the thoughtful design elements such as rounded corners to prevent scratches, a responsive touch button with excellent sealing, a universal G1/2-inch interface for easy adaptation, and a long power cord to reduce usage restrictions.
4. Setup
Follow these steps for proper installation of your tankless water heater:
- Mounting: Drill holes in the wall and insert the plastic expansion tubes. Tighten the water heater with screws. IMPORTANT: Please install vertically. Horizontal installation will lead to malfunction of the heating elements (E2 error).
- Water Connections: Connect the cold water inlet pipe to the inlet nipple (bottom) and the hot water outlet pipe to the outlet nipple (top). Ensure water pipes are well tightened. Teflon tape is recommended to prevent leaks. Otherwise, water may infiltrate into the heater and cause a short circuit (E2 error).
- System Priming: Before connecting the power, fill the tank and system with water and check for leaks. Open the hot water faucet until constant water flows from it. This ensures the heating element is submerged and prevents dry heating.
- Electrical Connection: Connect the unit to a dedicated circuit with appropriate wiring (≥ 2.5 square millimeters) and a 32A trip switch.

Figure 7: A diagram illustrating the vertical installation of the water heater under a sink, showing the cold water inlet, hot water outlet, and the importance of vertical mounting to prevent E2 errors.
5. Operating Instructions
Using your tankless water heater is straightforward:
- Power On/Off: Press the power button on the digital display to turn the unit on or off.
- Temperature Adjustment: The LED display shows the current water temperature. You can set the temperature in Fahrenheit or Celsius degrees by holding the power button for 6 seconds.
- Flow Adjustment: The unit adjusts heating based on water flow. Large water flow means lower temperature, and small water flow means higher temperature. Adjust the flow rate at your faucet to allow for more effective heating.

Figure 8: Demonstrates the versatility of the water heater for various applications, including kitchens (100°F), washing (86°F), garage (86°F), salon (95°F), and bathing (95°F).
6. Maintenance
To ensure the longevity and optimal performance of your water heater, regular maintenance is recommended:
- Regular Cleaning: Periodically clean the exterior of the unit with a soft, damp cloth. Do not use abrasive cleaners.
- Check for Leaks: Regularly inspect all water connections for any signs of leaks. Tighten connections if necessary.
- Inspect Wiring: Ensure electrical connections remain secure and free from damage.
- Winterization (if applicable): If the unit is installed in an area subject to freezing temperatures, ensure it is properly drained and disconnected to prevent damage.
7. Troubleshooting
Refer to the table below for common issues and their potential solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| E2 Error Displayed | Malfunction of heating elements, often due to horizontal installation or dry heating. | Ensure vertical installation. Before powering on, ensure the system is completely filled with water and all air is purged by opening the hot water faucet until a steady flow is achieved. |
| No Hot Water / Insufficient Heat | Low power supply, incorrect temperature setting, or high water flow rate. | Verify power supply (110V, 3000W) and circuit breaker (32A or higher). Adjust temperature setting on the digital display. Reduce water flow at the faucet to allow for more effective heating. |
| Water Leakage | Loose pipe connections. | Check and tighten all water inlet and outlet connections. Use Teflon tape for a secure seal. |
If the issue persists after attempting these solutions, please contact customer support.
8. Specifications
Detailed technical specifications for your xwdzswgs Electric Tankless Water Heater:
| Specification | Value |
|---|---|
| Brand | xwdzswgs |
| Model Number | CS-RSQ-US |
| Product Dimensions | 4.33"W x 7.87"H |
| Item Weight | 2.44 pounds |
| Color | White |
| Wattage | 3000 watts |
| Voltage | 110 Volts |
| Maximum Flow Rate | 0.5 Gallons Per Minute |
| Maximum Temperature | 131 Degrees Fahrenheit |
| Efficiency | Efficient |
| Maximum Operating Pressure | 1.2E+3 Kilopascal |
| Mounting Type | Wall |
| Included Components | 1 × Mini Instant Hot Water Heater, 1 × English Manual, 4 × Screws |

Figure 9: Provides a visual overview of the water heater's dimensions (7.87"H x 4.33"W x 2.8"D) and key requirements including power (3000W), voltage (110V AC), breaker (>=32 AMP), pipe fitting (1/2 inch NPT), water pressure (0.04-1.2MPa), wire requirements (>=2.5m²), and weight (2.2 lbs).
9. Warranty and Support
Your xwdzswgs Electric Tankless Water Heater comes with a 24-month warranty. If you encounter any issues or have questions regarding your product, please do not hesitate to contact our dedicated support team for assistance.
For support, please refer to the contact information provided with your purchase or visit the official xwdzswgs website.

Figure 10: Details the contents of the package, including one Mini Instant Hot Water Heater, one English Manual, and four screws for installation.