Introduction
This manual provides essential instructions for the safe and efficient operation, installation, and maintenance of your Noritz NR98SVNG 7.5 GPM Indoor/Outdoor Tankless Natural Gas Water Heater. Please read this manual thoroughly before installation or use and retain it for future reference. This unit is designed to provide continuous hot water for residential applications.
The Noritz NR98SVNG features a commercial-grade copper heat exchanger and is suitable for both indoor and outdoor installations. It can be linked with another NR98 unit for increased capacity using a quick connect cable (sold separately).
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.
DANGER: Carbon Monoxide Hazard. This appliance can produce carbon monoxide, which has no odor. Using it in an enclosed space can kill you. Never use this appliance in an enclosed space such as a camper, tent, car, or home.
- Installation must be performed by a qualified professional in accordance with all local codes and regulations.
- Ensure proper ventilation for indoor installations.
- Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
- Keep the area around the water heater clear and free from combustible materials.
- Regularly inspect the unit for any signs of damage or leaks.
Product Overview
The Noritz NR98SVNG is a high-efficiency tankless water heater designed for residential use. Key features include:
- Flow rates up to 7.5 GPM (Gallons Per Minute).
- Heat Exchanger constructed from commercial-grade copper, offering enhanced durability.
- Ability to link two units with a QC-2 Quick Connect Cord for increased hot water capacity.
- Includes a remote thermostat and a 6-foot power cord.
- Designed for use with single-wall Category III stainless steel venting.
Image: Front view of the Noritz NR98SVNG Tankless Natural Gas Water Heater. The unit is beige with a Noritz logo near the top and ventilation grilles at the bottom. Inlet and outlet pipes are visible at the bottom.
Setup and Installation
Professional Installation Required: Due to the complexity and safety requirements associated with natural gas and water connections, installation of the Noritz NR98SVNG water heater must be performed by a licensed and qualified professional. Failure to do so will void the warranty and could result in serious injury or property damage.
General Guidelines (for professional reference):
- Location: Ensure the chosen location complies with local codes for gas appliances, ventilation, and clearances. The unit is rated for indoor/outdoor use.
- Mounting: The unit is designed for wall mounting. Securely fasten the unit to a structurally sound wall capable of supporting its weight (approximately 54 pounds).
- Gas Connection: 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. An IK-WV-200-1-XX-LF valve kit is required for installation and is sold separately.
- Venting: For indoor installations, use single-wall Category III stainless steel venting, ensuring proper slope and termination according to manufacturer instructions and local codes.
- Electrical Connection: Connect the provided 6-foot power cord to a grounded 120-volt electrical outlet. The unit requires 7200 watts.
- Remote Thermostat: Install the remote thermostat in a convenient location for temperature adjustment.
Operating Instructions
Initial Startup (by qualified professional):
- Ensure all gas, water, and electrical connections are secure and leak-free.
- Open the main gas supply valve.
- Open the cold water supply valve to the unit.
- Purge air from the water lines by opening a hot water faucet in the house until water flows steadily.
- Plug in the power cord. The unit will perform a self-diagnostic check.
- Set the desired water temperature using the remote thermostat.
Normal Operation:
- The water heater will activate automatically when a hot water faucet is opened and the flow rate is sufficient.
- Hot water will be supplied continuously at the set temperature.
- Adjust the temperature as needed using the remote thermostat. The maximum temperature is 140 degrees Fahrenheit.
Shutting Down the Unit:
- For temporary shutdown, unplug the unit from the electrical outlet.
- For extended periods or maintenance, turn off the gas supply valve, close the water supply valves, and unplug the unit.
Maintenance
Regular maintenance ensures optimal performance and longevity of your Noritz tankless water heater. It is recommended that a qualified professional perform annual maintenance.
- Flushing: Periodically flush the heat exchanger to remove mineral buildup, especially in areas with hard water. Refer to the detailed flushing procedure in the full installation manual.
- Inlet Water Filter: Clean the inlet water filter screen regularly to prevent debris from entering the unit.
- Ventilation: Ensure that the air intake and exhaust vents are clear of obstructions.
- Visual Inspection: Check for any signs of leaks, corrosion, or damage to the unit, piping, and electrical connections.
- Gas Line: Inspect the gas line and connections for leaks.
Troubleshooting
If you experience issues with your water heater, consult this section. For problems not listed or if solutions do not resolve the issue, contact a qualified service technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water | No gas supply, power outage, low water flow, unit error code. | Check gas valve, check power, ensure sufficient water flow, check remote thermostat for error codes and refer to full manual. |
| Water not hot enough | Temperature setting too low, excessive flow rate, mineral buildup. | Increase temperature setting, reduce hot water demand, flush unit (professional service). |
| Unit cycles on/off frequently | Low flow rate, air in system, short cycling. | Ensure adequate flow, purge air from lines, consult professional. |
Specifications
| Brand | Noritz |
| Model Number | NR98SVNG |
| Fuel Type | Natural Gas |
| Flow Rate | Up to 7.5 GPM |
| Voltage | 120 Volts |
| Wattage | 7200 Watts |
| Maximum Temperature | 140 Degrees Fahrenheit |
| Mounting Type | Wall Mount |
| Product Dimensions | 13.8 x 10.6 x 23.6 inches |
| Item Weight | 54 pounds |
| Color | Beige |
| Certifications | ADA, Low Lead Compliant, NSF Approved, UL Listed |
| Included Components | Remote thermostat, 6-foot power cord |
Warranty Information
The Noritz NR98SVNG Tankless Natural Gas Water Heater comes with a manufacturer's warranty. Specific terms and conditions of the warranty, including coverage duration and limitations, are detailed in the warranty document provided with your product. Please retain your proof of purchase for warranty claims.
Note: Improper installation or unauthorized service will void the manufacturer's warranty.
Support and Contact
For technical assistance, service, or to locate a qualified Noritz service professional, please refer to the contact information provided in the packaging or visit the official Noritz website.
When contacting support, please have your model number (NR98SVNG) and serial number ready.
