How to Restart the Rinnai Main Controller

If you own a Rinnai hot water system complete with a secondary recirculation pump, you may come across times when you need to reset the unit via the main controller. For example, if you need to turn off the hot water to complete maintenance on your heating system, you need to restart the heater to start the heating process again. The process for restarting your Rinnai main controller is not difficult to complete.

Difficulty:Moderately Easy1

Turn off all hot water faucets in the building.

2

Turn off the power to the secondary pump via the breaker panel. If the hot water heater and pump are connected to the same breaker, turn off the water shutoff valve that feeds the secondary pump.

3

Turn on the water heater at the main remote control by pressing the “on/off” button.

4

Select the desired water temperature on the main control.

5

Open the shutoff valve on the secondary pump or turn on the breaker for the secondary pump to complete the reset.

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