1. Introduction
The MAREY ECO150 Electric Tankless Water Heater provides on-demand hot water, eliminating the need for a storage tank. This unit is ETL certified, ensuring compliance with electrical standards for safety and performance. Its compact design allows for installation in various spaces, and it features an LCD panel for easy temperature adjustment.
This tankless water heater is designed for up to two simultaneous points of use in regions with moderate incoming water temperatures (e.g., Southern and Central states of the US). It operates by heating water only when needed, contributing to energy and water savings.
Key Features:
- Electric tankless operation: 14.5kW / 240V
- ETL Certified for safety and performance
- Compact dimensions: 14.7" (H) x 8.7" (W) x 3.5" (D)
- On-demand hot water for energy and water efficiency
- LCD panel for precise temperature control
- Suitable for up to two simultaneous points of use
2. Safety Information
WARNING: Installation of this appliance must be performed by a qualified and licensed professional (electrician and plumber) in accordance with all national, state, and local electrical and plumbing codes. Failure to do so may result in property damage, serious injury, or death.
Before installation, ensure the main power supply to the installation area is turned off. Verify that the electrical system can support the unit's requirements. Do not operate the unit if any part is submerged in water or if the unit appears damaged.
Image: Important installation requirements for the ECO150 model, emphasizing professional installation and electrical specifications.
3. Installation
The MAREY ECO150 tankless water heater requires a dedicated electrical installation. Adherence to the following specifications is critical for safe and proper operation:
- Power Supply: 220V~240V
- Breaker: One 70 Amp double pole breaker
- Wiring: 6-gauge wires
Ensure sufficient space is available on your breaker panel to accommodate this unit. Professional installation is strongly recommended for safety and compliance with local codes.
Mounting and Connections:
The unit is designed for wall mounting. Refer to the internal diagram for component layout and connection points.
Image: Front view of the Marey ECO150 with key dimensions for installation planning.
Image: Bottom view of the unit, clearly indicating the hot water outlet (red) and cold water inlet (blue) connections.
Image: Detailed internal component layout of the ECO150, useful for understanding connections and potential service points.
Video: Compact ECO150 220V Electric Tankless Water Heater Overview
Video: An official overview of the Marey ECO150 tankless water heater, highlighting its compact design and features.
4. Operation
The ECO150 features an intuitive LCD display and control buttons for adjusting the water temperature. The unit heats water on demand, activating only when a hot water faucet is opened.
Image: Front panel of the ECO150, illustrating the digital temperature display and control buttons for user interaction.
Temperature Adjustment:
- Use the 'Up' and 'Down' arrow buttons on the LCD panel to set your desired water temperature.
- The maximum temperature setting is 125°F.
- The unit will automatically adjust its heating elements to reach and maintain the set temperature as water flows through it.
For optimal performance, especially in colder regions, consider the incoming water temperature. If incoming water is consistently 55°F or lower, a higher capacity model like the ECO180 might be more suitable for multiple points of use.
Image: Temperature map indicating suitable Marey tankless water heater models based on geographical location and typical incoming water temperatures.
5. Maintenance
Regular maintenance ensures the longevity and efficient operation of your tankless water heater. It is recommended to perform annual flushing of the unit to prevent mineral buildup, especially in areas with hard water.
Flushing Procedure:
- Turn off the power supply to the water heater at the circuit breaker.
- Close the cold water inlet valve and hot water outlet valve to the unit.
- Connect a descaling pump and hoses to the service valves (if installed) or directly to the inlet/outlet connections.
- Circulate a descaling solution through the unit for approximately 45-60 minutes.
- Flush the unit with fresh water to remove any remaining descaling solution.
- Reconnect the water lines, open the valves, and restore power.
Consult a qualified plumber if you are unsure about performing this maintenance task.
6. Troubleshooting
If you experience issues with your ECO150 water heater, review the following common troubleshooting steps. Always ensure the power supply is disconnected before performing any internal inspections or adjustments.
Common Issues and Solutions:
- No Hot Water / Unit Not Activating:
- Check the circuit breaker for the unit; reset if tripped.
- Verify water flow. The unit requires a minimum flow rate to activate.
- Inspect the internal electrical reset button (often red). If tripped, press to reset. This may require removing the cover.
- Inconsistent Water Temperature (Cold/Boiling Cycles):
- Ensure the incoming water temperature is within the unit's operating range for your region.
- Check for mineral buildup in the unit, which can affect heating efficiency. Regular flushing is important.
- Verify that the flow rate is not too high for the unit's capacity, especially if multiple fixtures are running simultaneously.
- Unit Leaking:
- Check all plumbing connections for tightness.
- Inspect the flushing screw (if present) on the back of the unit; ensure it is tightened correctly.
If issues persist after attempting these steps, contact a qualified professional or MAREY customer support.
7. Specifications
| Attribute | Value |
|---|---|
| Brand | MAREY |
| Model Number | ECO150 |
| Power Source | Electric |
| Wattage | 14.5 KW |
| Voltage | 240 Volts |
| Heat Output | 14.6 Kilowatts |
| Product Dimensions (W x H x D) | 8.7"W x 14.7"H x 3.5"D |
| Item Weight | 10.34 Pounds |
| Maximum Temperature | 125 Degrees Fahrenheit |
| Efficiency | 2.5 GPM at a 45°F rise |
| Maximum Pressure | 87 Pound per Square Inch |
| Mount Type | Wall |
| Material Type | Plastic |
| Color | White |
| Special Feature | LED Display |
| Included Components | 1 unit of ECO150, mounting hardware, warranty card and installation manual |
8. Warranty and Support
The MAREY ECO150 Electric Tankless Water Heater comes with a 5-year limited warranty provided by the manufacturer. Please retain your proof of purchase for warranty claims.
For technical assistance, troubleshooting, or warranty inquiries, please refer to the contact information provided in your included warranty card or visit the official MAREY website.
Online Support: Visit the MAREY Store on Amazon