Rinnai Tankless Water Heater mc-91-1us-s

Introduction

This tutorial provides a comprehensive guide for navigating the control panel of the Rinnai Tankless Water Heater model MC-91-1US-S. If you've struggled with setting up or adjusting your water heater, this step-by-step instruction will help you master the controls effectively.

Step 1: Accessing the Settings Menu

To begin adjusting your water heater settings, follow these steps:

1. Ensure the display is set to clock mode.
2. Press the timer button for recirculation until the entire clock display disappears.
3. This action allows you to access various functions without the clock settings interfering.

Step 2: Understanding the Options

Once you're in the settings menu, you will see four options. Here’s how to navigate them:

1. Option 1: Display Settings

   • Here, you can choose between different display modes:
     • 0: Off
     • 1: Dimmed
     • 2: Normal
   • Adjust this based on your visibility preference.

2. Option 2: Keypad Beep

   • This setting controls whether the keypad beeps when pressed:
     • 0: Beep off
     • 1: Beep on
   • Toggle this based on your preference for audible feedback.

3. Option 3: Time Display

   • Set this option to configure your time:
     • 0: Turn off the time display
     • 1: Standard time display
     • 2: Configure time (set to 2 for time adjustments).

4. Option 4: Temperature Units

   • Choose between Fahrenheit and Celsius:
     • 0: Celsius
     • 1: Fahrenheit
   • Adjust based on your preferred temperature scale.

Step 3: Setting the Time

After setting Option 3 to 2, you can configure the time:

1. The display will show the current time in a quasi-power-down mode.
2. Press the function button again to make the time display blink.
3. Use the up and down arrows to adjust the hours and minutes. Holding the button will allow you to skip through larger increments.
4. Once the correct time is set, press the power button to finalize your settings.
5. Press the timer button again to restore the previous display settings.

Conclusion

You now have a clear understanding of how to navigate and configure the settings on your Rinnai Tankless Water Heater MC-91-1US-S. By following these steps, you can easily adjust the display, sound settings, time, and temperature units. If you encounter any challenges, revisit the steps or consult the user manual for additional guidance. Enjoy your optimized water heating experience!