1. Introduction
Thank you for choosing the ORBEK 18kW Tankless Electric Water Heater. This on-demand instant hot water heater is designed to provide continuous hot water for 2-3 points of use simultaneously throughout your whole house. Featuring a new generation spiral heating element and advanced temperature control, it offers high energy efficiency and precise temperature management. Please read this manual thoroughly before installation and operation to ensure safe and optimal performance.
Figure 1: ORBEK 18kW Tankless Electric Water Heater
2. Safety Information
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. Read the installation, operating, and maintenance instructions thoroughly before installing or servicing this equipment.
- This appliance is ETL Certified, ensuring it meets rigorous safety standards.
- Professional installation by a qualified electrician and plumber is highly recommended due to the 240V electrical requirements and plumbing connections.
- Ensure the unit is properly grounded to prevent electrical shock.
- Do not operate the unit if it is damaged or not functioning correctly.
- The unit incorporates comprehensive security protection features including anti-leakage, anti-scald, anti-parched, anti-high-pressure, and anti-scaling mechanisms.
Figure 2: ETL Certification and Comprehensive Security Protection
3. Product Overview & Features
The ORBEK 18kW Tankless Electric Water Heater is designed for efficiency and user convenience. Key features include:
- New Generation Spiral Heating Element: This advanced heating element is not only more efficient but also leakage-proof, designed to avoid short-circuiting, improve overall efficiency, and prevent scaling.
- Precise Temperature Control: Equipped with a temperature sensor, water inlet flow rate sensor, and an AI Temperature Control Chip, the unit maintains a stable water temperature with ±1°F precision, even if restarted midway.
- Wide Temperature Range: Offers a temperature range from 86°F to 140°F (30°C to 60°C).
- LED Digital Display: A high-definition screen with sensitive touch controls and soft lighting provides real-time display of machine operating conditions.
- High Heating Efficiency: Achieves 98% heating efficiency, contributing to significant electricity cost savings.
- Intelligent Power Adjustment: The system intelligently adjusts power consumption based on demand.
- Professional ETL Certification: Ensures product safety and quality.
Figure 3: New Generation Spiral Heating Element
Figure 4: Precise Temperature Control System
Figure 5: Digital Display and Controls
4. Specifications
| Feature | Specification |
|---|---|
| Power Rating | 18 kW |
| Voltage | 240 Volt |
| Max Flow Rate | Up to 4.17 GPM (Gallons Per Minute) |
| Temperature Range | 86°F - 140°F (30°C - 60°C) |
| Heating Efficiency | 98% |
| Installation Method | Assembly (Wall-mounted) |
| Certification | ETL Certified |
| Approx. Product Dimensions (L x W x H) | 22 x 22 x 11 inches (Note: These are estimated package dimensions, actual product dimensions may vary slightly) |
| Approx. Product Weight | 11.0 lbs |
5. Installation & Setup
IMPORTANT: Installation must comply with all local electrical and plumbing codes. It is strongly recommended that a licensed electrician and plumber perform the installation.
5.1 Choosing a Location
- Install the unit indoors only, in a dry, frost-free area.
- Ensure adequate clearance around the unit for maintenance and airflow.
- Mount the unit vertically on a sturdy wall capable of supporting its weight when full of water.
5.2 Plumbing Connections
- Connect the cold water inlet (blue) and hot water outlet (red) to your plumbing system.
- Install shut-off valves on both the inlet and outlet lines for easy servicing.
- Flush the water lines thoroughly before connecting to the heater to remove any debris.
- Ensure all connections are watertight.
5.3 Electrical Connections
- The unit requires a dedicated 240V electrical circuit.
- For an 18kW unit at 240V, this typically requires two dedicated 40A or 50A double-pole circuit breakers, depending on local codes and wire gauge. Consult a licensed electrician.
- Connect the electrical wiring according to the wiring diagram provided on the unit and local electrical codes.
- Ensure proper grounding.
5.4 Initial Startup
- After plumbing and electrical connections are complete, slowly open the hot water faucet at a nearby fixture to allow air to escape the system.
- Once a steady stream of water flows from the hot water faucet, close the faucet.
- Turn on the cold water supply to the heater.
- Turn on the circuit breakers for the water heater.
- The unit's display should illuminate, indicating it is ready for operation.
Figure 6: Example Installation Setting
6. Operating Instructions
The ORBEK Tankless Electric Water Heater features an intuitive LED digital display and touch controls for easy operation.
6.1 Power On/Off
- Press the power button () to turn the unit on or off.
6.2 Setting Temperature
- Use the up () and down () arrow buttons on the touch display to adjust the desired water temperature. The temperature range is 86°F to 140°F.
6.3 Fahrenheit/Celsius Selection
- Press the F/C button () to switch between Fahrenheit and Celsius temperature display.
6.4 Real-time Display
- The high-definition LED screen will show the current water temperature and other operating conditions in real-time.
6.5 Continuous Hot Water
- Once the desired temperature is set and water flow is detected, the unit will provide continuous hot water at the set temperature.
7. Maintenance
Regular maintenance helps ensure the longevity and efficiency of your tankless water heater.
- Scale Prevention: The unit is designed with features to reduce scale buildup. However, in areas with hard water, periodic flushing of the unit may be beneficial. Consult a plumber for recommendations based on your local water conditions.
- Check Connections: Periodically inspect all water and electrical connections for any signs of leaks or corrosion. Tighten any loose connections.
- Clean Exterior: Wipe the exterior of the unit with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Air Vents: Ensure that the air vents on the unit are not obstructed to allow for proper airflow.
8. Troubleshooting
If you encounter issues with your water heater, refer to the following troubleshooting guide:
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water / Unit not turning on | No power; Circuit breaker tripped; Water flow too low; Unit is off. | Check circuit breakers; Ensure unit is plugged in and powered on; Verify adequate water flow (minimum activation flow rate); Press power button on unit. |
| Inconsistent water temperature | Fluctuating water pressure; Air in the system; Incorrect temperature setting; Multiple hot water demands. | Check water pressure; Bleed air from lines; Adjust temperature setting; Reduce simultaneous hot water usage. |
| Low hot water flow | Clogged aerators/showerheads; Sediment buildup in unit; Partially closed shut-off valve. | Clean aerators/showerheads; Flush the unit (if sediment is suspected); Ensure all valves are fully open. |
| Error code on display | Internal fault; Sensor issue; Overheating. | Note the error code and consult the seller's support for specific guidance. Try resetting the unit by turning off and on the circuit breaker. |
| Water is too hot or too cold | Temperature setting incorrect; Inlet water temperature too low/high. | Adjust the temperature setting on the display. The unit will heat water to the set temperature relative to the incoming water temperature. |
If the problem persists after attempting these solutions, please contact customer support.
9. User Tips
- Professional Installation: While the unit is described as 'easy to install', the high electrical demand (240V, 18kW) makes professional installation by a licensed electrician and plumber crucial for safety and proper function.
- Water Hardness: If you live in an area with very hard water, consider installing a water softener to minimize scale buildup and prolong the life of your tankless water heater.
- Sizing: This 18kW unit is suitable for 2-3 points of use. For larger homes or higher hot water demands, ensure the unit's capacity meets your specific needs.
- Temperature Setting: Experiment with the temperature setting to find a comfortable and energy-efficient level for your household. Avoid excessively high temperatures to prevent scalding and reduce energy consumption.
10. Warranty & Support
For warranty information, please refer to the documentation provided with your purchase or contact the seller directly. Keep your proof of purchase for any warranty claims.
If you require technical assistance, troubleshooting beyond this manual, or have questions about your ORBEK Tankless Electric Water Heater, please contact the seller's customer support team.