1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Noritz EZ98DV-NG Tankless Water Heater. Please read this manual thoroughly before attempting any installation or operation. Retain this manual for future reference.
The Noritz EZ98DV-NG is a high-efficiency, natural gas (NG) tankless water heater designed for outdoor installation, providing on-demand hot water for residential applications.
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.
- Always ensure proper ventilation as specified in the installation instructions.
- Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
- Never obstruct the flow of combustion or ventilation air.
- This appliance must be installed by a qualified professional in accordance with all local codes and ordinances.
- Turn off the gas supply and electrical power before performing any service or maintenance.
3. Setup and Installation
The Noritz EZ98DV-NG is designed for outdoor installation. Proper placement and connection to gas, water, and electrical supplies are critical for safe and efficient operation. Professional installation is strongly recommended.
3.1 Mounting the Unit
The unit must be securely mounted to a sturdy wall or structure capable of supporting its weight (approximately 70 pounds). Ensure the mounting location allows for proper clearances for ventilation, maintenance, and access to connections.
Image: Noritz EZ98DV-NG tankless water heater installed on an exterior wall, demonstrating typical outdoor placement and plumbing connections.
Image: The Noritz EZ98DV-NG unit mounted on a wall in a utility space, with visible gas and water lines connected.
3.2 Venting Configurations
The EZ98DV-NG supports various venting configurations. Consult the detailed installation guide for specific requirements based on your chosen setup.
Image: Illustration of various venting options for Noritz EZ series, including Outdoor, Single Vent, 2-inch Flex Vent, and Direct Vent configurations.
3.3 Gas, Water, and Electrical Connections
- Gas Supply: Connect to a natural gas supply line of appropriate size and pressure. All gas connections must be leak-tested.
- Water Connections: Connect the cold water inlet and hot water outlet lines. Install shut-off valves and a pressure relief valve as required by local codes.
- Electrical Power: The unit requires a 120V AC power supply. Ensure proper grounding.
4. Operating Instructions
Once installed and all connections are verified, the Noritz EZ98DV-NG is designed for automatic operation.
4.1 Initial Startup
- Ensure all water and gas valves are open.
- Turn on the electrical power to the unit.
- The unit will perform a self-diagnostic check.
- Open a hot water faucet in your home to allow water to flow through the unit. The heater will automatically ignite and begin producing hot water.
4.2 Temperature Adjustment
The water heater's temperature can be adjusted via the digital controller. Refer to the separate controller manual for detailed instructions on setting the desired hot water temperature. The maximum temperature setting is 140 degrees Fahrenheit.
4.3 Shutting Down the Unit
For temporary shutdown, simply turn off the electrical power to the unit. For extended periods of inactivity or maintenance, it is recommended to also close the gas supply valve and water supply valves.
5. Maintenance
Regular maintenance ensures the longevity and efficient operation of your tankless water heater. Always disconnect power and close gas and water valves before performing maintenance.
- Annual Flushing: It is recommended to flush the heat exchanger annually to remove mineral buildup, especially in areas with hard water. This procedure should be performed by a qualified technician.
- Ventilation Check: Periodically inspect the air intake and exhaust vents for any obstructions (e.g., leaves, debris, insect nests).
- Leak Inspection: Regularly check all water and gas connections for any signs of leaks.
- Filter Cleaning: If your unit is equipped with a water filter, clean or replace it as per the manufacturer's recommendations.
6. Troubleshooting
This section addresses common issues you might encounter. For complex problems, contact a qualified service technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water | No gas supply, power outage, low water flow, error code displayed. | Check gas valve, check circuit breaker, ensure adequate water flow, consult error code in main manual. |
| Inconsistent water temperature | Fluctuating water pressure, mineral buildup, incorrect temperature setting. | Check water pressure, consider annual flushing, adjust temperature setting. |
| Unit not igniting | No gas, ignition failure, blocked vent. | Verify gas supply, check for error codes, inspect vents for obstructions. |
7. Specifications
- Model: EZ98DV-NG
- Power Source: Corded Electric (120V AC)
- Fuel Type: Natural Gas (NG)
- Product Dimensions: Approximately 5"W x 5"H x 5"D (Note: These dimensions appear to be placeholders and should be verified with official product documentation for accuracy.)
- Item Weight: 70 Pounds
- Mount Type: Wall
- Maximum Temperature: 140 Degrees Fahrenheit
- Efficiency: High
- Installation Style: Outdoor Installation
- Manufacturer: Noritz
- UPC: 817000019075
8. Warranty Information
The Noritz EZ Series tankless water heaters, including the EZ98DV-NG model, typically come with a comprehensive warranty. As indicated by product imagery, the EZ Series offers a 25-year warranty.
Image: The Noritz EZ Series warranty badge, indicating a 25-year warranty.
For specific terms, conditions, and registration details, please refer to the warranty card included with your product or visit the official Noritz website.
9. Support
If you require technical assistance, have questions regarding installation, operation, or maintenance, or need to schedule service, please contact Noritz customer support or a qualified service professional.
- Noritz Official Website: www.noritz.com
- Customer Service: Refer to the contact information provided on the Noritz website or in your product packaging.
