1. Introduction
This manual provides essential information for the safe installation, operation, and maintenance of your EcoSmart POU 3.5 Electric Tankless Water Heater. Please read this manual thoroughly before installation and use, and retain it for future reference. This unit is designed for point-of-use applications, typically for a single sink, providing hot water on demand.
Figure 1: Front view of the EcoSmart POU 3.5 Electric Tankless Water Heater, displaying its compact design and digital temperature readout.
2. Important 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.
Observe all local codes and ordinances. In the absence of local codes, refer to the National Electrical Code (NEC) and the Uniform Plumbing Code (UPC).
- This appliance must be grounded.
- Do not operate this water heater if it has been damaged or is not functioning properly.
- Ensure the unit is installed in an area protected from freezing temperatures.
- Turn off power to the unit at the circuit breaker before performing any maintenance or service.
- Do not attempt to repair this unit yourself. Contact qualified service personnel.
3. Product Overview
The EcoSmart POU 3.5 is a compact, electric tankless water heater designed for single point-of-use applications. It provides hot water efficiently and on demand, making it suitable for locations such as bathroom sinks, wet bars, or small utility sinks.
Key Features:
- Compact design for under-sink installation.
- Digital temperature display.
- Energy-efficient operation.
- Includes a 0.5 GPM sink aerator for optimal performance in single-sink applications.
Figure 2: Internal components of the POU 3.5, highlighting the heating elements and control board.
4. Setup and Installation
Proper installation is critical for the safe and efficient operation of your EcoSmart POU 3.5 water heater. It is recommended that installation be performed by a qualified electrician and plumber.
4.1 Location Requirements
- Install the unit as close as possible to the point of use to minimize heat loss.
- Ensure the mounting surface is solid and capable of supporting the unit's weight (approximately 4 lbs).
- The unit must be protected from direct sunlight, freezing temperatures, and excessive moisture.
4.2 Electrical Requirements
- Voltage: 120 Volts
- Wattage: 3500 watts (3.5 kW)
- Amperage Draw: 29 amps
- Circuit Breaker: Requires 1 x 30 amp dedicated breaker.
- Wire Gauge: 10 AWG wire.
- The unit must be properly grounded.
4.3 Plumbing Requirements
- Connection Fittings: 1/2" NPT.
- Maximum Operating Pressure: 150 PSI.
- Install a pressure relief valve if local codes require it.
- Flush the water lines thoroughly before connecting the unit to remove any debris.
- Ensure all connections are watertight to prevent leaks.
- The unit is designed for a maximum flow rate of 0.5 GPM for single applications and includes a 0.5 GPM sink aerator.
Figure 3: Installation guide detailing temperature rise based on flow rate and electrical requirements for the POU 3.5.
5. Operating Instructions
Once properly installed and connected to power and water, your EcoSmart POU 3.5 is ready for operation.
5.1 Initial Startup
- Ensure all plumbing connections are secure and leak-free.
- Open the hot water faucet at the sink where the unit is installed and allow water to flow for several minutes to purge all air from the system. This step is crucial to prevent damage to the heating elements.
- Close the hot water faucet.
- Turn on the electrical power to the unit at the circuit breaker.
- The digital display on the unit should illuminate.
5.2 Adjusting Temperature
- Use the up and down arrow buttons on the front panel to set your desired water temperature. The maximum temperature is 105°F.
- The unit will automatically heat water to the set temperature when water flows through it.
5.3 Normal Operation
When you open the hot water faucet, the unit will detect water flow and activate the heating elements. Hot water will be delivered within seconds. The digital display will show the current output temperature.
6. Maintenance
Regular maintenance helps ensure the longevity and efficiency of your water heater.
- Annual Inspection: It is recommended to have a qualified technician inspect the unit annually for scale buildup, leaks, and electrical connections.
- Cleaning: The exterior of the unit can be cleaned with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Sediment Filter: If your water supply has high sediment, consider installing an external sediment filter to protect the unit.
- Freezing Protection: If the unit is installed in an area prone to freezing, ensure it is properly drained or protected from freezing temperatures when not in use to prevent damage.
7. Troubleshooting
Before contacting customer support, review the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water / Unit not turning on | No power; Air in lines; Insufficient water flow; Circuit breaker tripped. | Check circuit breaker; Purge air from lines by running hot water; Ensure adequate water flow (min 0.3 GPM); Reset circuit breaker. |
| Water not hot enough | Temperature setting too low; Excessive water flow; Cold incoming water temperature. | Increase temperature setting; Reduce water flow at the faucet; Consider a higher capacity unit if incoming water is very cold. |
| Unit leaking | Loose plumbing connections; Damaged internal component. | Tighten connections; If leak persists, turn off water and power and contact support. |
| Error code on display | Specific internal fault. | Refer to the full manual for specific error code meanings or contact customer support. |
8. Specifications
| Specification | Value |
|---|---|
| Model | POU 3.5 |
| Brand | EcoSmart |
| Wattage | 3500 watts (3.5 kW) |
| Voltage | 120 Volts |
| Amperage Draw | 29 amps |
| Required Breaker | 1 x 30 amp |
| Required Wire Gauge | 10 AWG |
| Maximum Flow Rate | 1.5 Gallons Per Minute (GPM) |
| Recommended Flow Rate (single sink) | 0.5 GPM (with included aerator) |
| Maximum Temperature | 105 Degrees Fahrenheit |
| Efficiency | 0.95 |
| Maximum Operating Pressure | 150 PSI |
| Mounting Type | Wall |
| Product Dimensions (L x W x H) | 11 x 6 x 3 Inches |
| Item Weight | 4 pounds |
| Connection Fittings | 1/2" NPT |
Figure 4: Side view of the POU 3.5, displaying regulatory labels and certifications.
9. Warranty and Support
9.1 Warranty Information
The EcoSmart POU 3.5 Electric Tankless Water Heater comes with a 1 Year Warranty on electronics, exchanger, and heating elements. This warranty covers the cost of the heater itself but does not cover labor or any incidental damages incurred during installation, repair, or replacement.
Please retain your proof of purchase for warranty claims.
9.2 Customer Support
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact EcoSmart customer support. Refer to the product packaging or the official EcoSmart website for the most current contact information.
