Safety Circuit - Rinnai FC510N User Manual

Safety Circuit

Caution: Shut off gas and power supply to the unit before proceeding.
1. Burner sensor mounted on the left hand side of the burner assembly is designed to detect the burner temperature. If combustion
conditions cause the burner temperature to drop below a predetermined temperature, the sensor will shut the unit off and flash an
error code related to the fault.
2. The thermal-fuse located on the top of the burner chamber is designed to shut the unit down in the event the unit senses an abnormal
temperature due to improper gas pressure settings, cracked or damaged burner chamber or restricted air flow through the appliance.
This safety device activates at 420
3. The overheat thermistor on top of the burner chamber is designed to shut the unit down in the event the unit senses an abnormal
temperature due to improper gas pressure settings, cracked or damaged burner or restricted air flow through the appliance. This
safety device activates at 131
4. The pilot burner sensor is located on the right hand side of the burner assembly. This sensor serves as an Oxygen Depletion Sensor
or (ODS). If the oxygen level in the room drops below a preset limit, this sensor disables the gas supply to the heater shutting the unit off.
1
0 0
F or 216 C.
0 0
F or 55 C.
3
2
4