Rinnai REU - 16 FUA - E - Manual (Page 22)

22
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 37-60͠. When the temperature set point is above 50͠ the
High Temperature Indicator glows.
Temperature can not be set above 50͠ 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.
OPERATION PRINCIPLE