Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Eemax EX80T FS 8.0KW 277V Electric Tankless Water Heater. Please read all instructions thoroughly before beginning installation or operation. Proper adherence to these guidelines will ensure optimal performance and longevity of your unit.
Important Safety Information
Failure to follow these safety instructions could result in property damage, serious injury, or death. This appliance must be installed by a qualified professional in accordance with all national and local electrical and plumbing codes.
- Electrical Safety: Disconnect all power to the unit at the circuit breaker before performing any installation, maintenance, or service. Ensure proper grounding.
- Water Safety: Shut off the main water supply before connecting or disconnecting water lines. Install a pressure relief valve as required by local codes.
- Temperature: Hot water can cause severe burns. Exercise caution when setting and using the water heater.
- Location: Install the unit in a location protected from freezing temperatures and where water leakage will not cause damage.
Product Overview
Key Features
- 3/4 inch NPT water connections on the bottom of the unit for easy installation.
- Compact design saves space.
- Thermostatic control for precise outlet temperature.
- 99% energy efficient operation.
- Provides on-demand hot water.
Component Identification
Figure 1: Internal Components (Representative)
This image displays the internal wiring and connection points of an Eemax tankless water heater. Note that the label visible in this specific image refers to model EX35T (240VAC, 3.5kW), which differs from your EX80T FS (277V, 8.0KW) model. However, the general layout of electrical terminals (L1, L2, Ground) and water connections is similar across models. The unit is designed for installation with the water connections at the bottom, as indicated by the "INSTALL THIS WAY UP ONLY!" label.
Installation Guide
Professional installation is strongly recommended for this appliance to ensure compliance with all applicable codes and safety standards.
Pre-Installation Checks
- Verify that the electrical supply matches the unit's requirements (277 Volts, 8000 Watts).
- Ensure adequate water pressure and flow rate are available at the installation site.
- Confirm that the mounting surface is structurally sound and capable of supporting the unit's weight (approximately 30 pounds).
Mounting
Select a suitable vertical surface for mounting. Securely fasten the unit using appropriate hardware, ensuring it is level and accessible for service.
Plumbing Connections
- Connect the 3/4 inch NPT cold water supply line to the inlet connection at the bottom of the unit.
- Connect the hot water outlet line to the corresponding connection at the bottom of the unit.
- Flush the system thoroughly to remove any air or debris before making electrical connections.
Electrical Connections
- Ensure the main power supply is OFF at the circuit breaker.
- Connect the appropriate gauge wiring (suitable for 8000 watts at 277 volts) to the L1, L2, and Ground terminals inside the unit.
- Verify all connections are secure and properly insulated.
- The appliance must be grounded.
Operating Instructions
Initial Startup
- After plumbing and electrical connections are complete and verified, open the hot water faucet at a fixture to allow water to flow through the unit.
- Once water is flowing steadily and all air is purged from the system, turn on the electrical power at the circuit breaker.
- The unit will begin heating water on demand.
Temperature Control
The Eemax EX80T FS features thermostatic control to maintain a precise outlet temperature. Refer to the unit's internal controls or external display (if applicable) for temperature adjustment. Always test water temperature before use to prevent scalding.
Energy Efficiency
This tankless water heater is 99% energy efficient, heating water only when a hot water faucet is opened. This on-demand operation minimizes standby heat loss, contributing to energy savings.
Maintenance
Regular maintenance ensures the continued efficient operation of your tankless water heater. Always disconnect power before performing any maintenance.
- Descaling: Depending on water hardness, periodic descaling may be necessary to remove mineral buildup. Consult a qualified plumber for this service.
- Check Connections: Periodically inspect all water and electrical connections for leaks or loose wiring.
- Clean Exterior: Wipe the exterior of the unit with a soft, damp cloth. Do not use abrasive cleaners.
Troubleshooting
Before contacting customer support, review the following common issues and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water | No power to unit; water supply off; unit malfunction | Check circuit breaker; ensure water supply is open; contact support if issue persists. |
| Insufficient hot water | Flow rate too high; mineral buildup; incorrect temperature setting | Reduce flow at faucet; consider descaling; adjust temperature setting. |
| Water leakage | Loose plumbing connections; damaged component | Tighten connections; shut off water and power, contact a plumber. |
Technical Specifications
| Specification | Detail |
|---|---|
| Brand | Eemax |
| Model | EX80T FS |
| Wattage | 8000 watts |
| Voltage | 277 Volts |
| Item Weight | 30 pounds |
| Product Dimensions | 12 x 5 x 3 inches |
| Part Number | EX80T FS |
| UPC | 091654900686 |
| Efficiency | 99% |
| Water Connections | 3/4 inch NPT |
Warranty and Support
For detailed warranty information, please refer to the official documentation provided with your Eemax EX80T FS water heater or visit the Eemax official website. For technical support or service inquiries, contact Eemax customer service directly using the contact information found on their website or in your product packaging.
