How do I configure Circ-Logic recirculation on my Rinnai RSC199EP tankless water heater?

[PaisleeLee]

Setting up Circ-Logic recirculation on your Rinnai RSC199EP tankless water heater ensures hot water is quickly available. This feature provides two primary modes: Dedicated Mode and Crossover Mode. To set up Circ-Logic, consult your Rinnai RSC199EP user manual for detailed instructions.

Here’s a breakdown:

1. Dedicated Mode: This mode requires a dedicated return line. The built-in pump circulates water from the water heater through the return line and back. Ensure the return line is correctly connected to the Rinnai RSC199EP.

2. Crossover Mode: If a dedicated return line isn't possible, use Crossover Mode. Install the included Thermal Bypass Valve at the fixture farthest from the water heater. This valve recirculates water without a dedicated return line. Connect the Thermal Bypass Valve properly to your Rinnai RSC199EP.

3. Additional Considerations: For scheduled recirculation, consider using the MC-195T-US or control·r™ Wi-Fi Module. Align your recirculation schedules with your hot water usage to maximize energy efficiency. Always refer to your user manual for specific setup and configuration instructions for your Rinnai RSC199EP tankless water heater.