Is it ok to perform routine maintenance on the Noritz NR66 OD if I have hard water in my area?

Performing routine maintenance on the Noritz NR66 OD tankless water heater, especially in areas with hard water, is not only okay but highly recommended. Hard water contains minerals like calcium and magnesium, which can lead to scale buildup inside the heat exchanger and other components of the water heater over time. Regular maintenance can help prevent and address the effects of hard water, ensuring that your tankless water heater operates efficiently and has an extended lifespan.

Here are the key maintenance tasks you should consider performing if you have hard water in your area:

1. Flushing the Heat Exchanger: Flushing the heat exchanger is one of the most critical maintenance tasks for a tankless water heater in a hard water area. Over time, mineral scale can accumulate on the heat exchanger's surface, reducing its efficiency and heating capacity. Flushing involves removing this scale buildup by circulating a descaling solution through the unit. The frequency of flushing may vary depending on water hardness levels but is typically recommended annually.
2. Cleaning or Replacing the Inlet Water Filter: The NR66 OD has an inlet water filter designed to trap debris and particles from the incoming water supply. In areas with hard water, this filter can become clogged with scale and sediment. Regularly inspect and clean the filter to ensure proper water flow. If the filter is damaged or deteriorated, replace it with a new one.
3. Inspecting the Venting System: Check the venting system for any obstructions, blockages, or signs of corrosion. Proper venting is essential for the safe operation of the tankless water heater. Ensure that the vent pipes are correctly installed and securely connected.
4. Monitoring for Leaks: Routinely inspect the unit and its connections for any signs of water leaks. Leaks can occur over time due to various factors, including scale buildup, corrosion, or loose connections. Addressing leaks promptly can prevent water damage and maintain the unit's integrity.
5. Testing the Pressure Relief Valve: The pressure relief valve is a safety device designed to release excess pressure from the water heater. Test the valve periodically to ensure it is functioning correctly. Follow the manufacturer's guidelines for testing and replacing the valve if necessary.
6. Checking for Error Codes: Modern tankless water heaters like the NR66 OD often have diagnostic features that display error codes in case of issues. Familiarize yourself with these codes and consult the user manual to troubleshoot any problems that may arise.
7. Professional Maintenance: While some maintenance tasks can be performed by homeowners, it's advisable to schedule professional maintenance at least once a year. A qualified technician can perform a comprehensive inspection, ensure proper combustion, check for gas leaks, and conduct a more thorough assessment of the unit's overall condition.

By regularly performing these maintenance tasks, you can address the impact of hard water on your Noritz NR66 OD tankless water heater effectively. This proactive approach helps prevent scale buildup, maintains energy efficiency, prolongs the unit's lifespan, and ensures safe and reliable hot water delivery. Additionally, following the manufacturer's recommendations for maintenance and adhering to local water quality guidelines will help you get the most out of your tankless water heater in a hard water environment.