Main Componentry - Rinnai RCE-460PTR Service Manual

9. Main Componentry

Safety Devices
Incomplete Combustion Prevention
The Incomplete Combustion Prevention Device senses flame temperature using a sensor with a
thermocouple. Thermocouples are widely used as burner safety devices. The Incomplete
Combustion Safety Device is incorporated in a special burner structure connected to an electronic
sensor. Ignition, combustion and flame failure are monitored by this system, and main burner
abnormal combustion or incomplete combustion due to unclean air are electronically sensed as a
thermocouple change from flame temperature change prior to occurence.
The amplifier amplifies the thermocouple output by a few volts (20 ~ 30 m V) and any changes are
checked against the comparator. If the output is lower than the standard voltage of the comparator,
the solenoid valve closes.
Convector 460/560PTR - 19 - ©Rinnai