Rinnai REU - 16 FUA - E user manual Operation Principle

OPERATION PRINCIPLE

HOT WATER SUPPLY OPERATION

Ignition

Press ON/OFF Button of Remote Controller to turn on unit and the remote control- ler display and priority LED will light up.

When a hot water tap is opened the Water Flow Sensor revolves and sends a pulse signal to the Printed Circuit Board (PCB.) When the PCB detects water flow it be- gins the ignition process with the Combustion Fan Motor starting first.

Once the air proving is made the Main Solenoid Valve and Change-over Solenoid Valves are opened and the Burner is lit by the sparking Igniter.

Temperature Setting

With the Temperature Control Buttons on the remote controller the outlet tempera- ture can be set from 37-60 . When the temperature set point is above 50 the High Temperature Indicator glows.

Temperature can not be set above 50 while hot water is in use.

Standby

When the hot water tap is closed the PCB no longer receives a pulse signal from the Water Flow Sensor. The PCB shuts the Main Solenoid Valveand Change-over So- lenoid Valves and the Burner extinguishes.

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