Infinity REU-VR3237WG / HD250e REU-VRM3237WC - 2 - Issue 1 - 19/05/09 ©Rinnai
Sensors and Safety Functions
• Hot Water Delivery Thermistor: Measures hot water temperature at the outlet valve (i.e. the ‘mixed’
temperature).
• Heat Exchanger Thermistor: Measures water temperature in the heat exchanger.
• Flame Rod: Monitors combustion characteristics inside the combustion chamber. If the flame fails, gas
supply is stopped.
•
Overheat Switch: Situated on the heat exchanger, gas supply is stopped when water temperature
reaches 97ºC for a number of seconds.
•
Fusible Link: Situated on the heat exchanger, electrical power supply is stopped if the temperature
exceeds 129ºC.
•
Water Pressure Relief Valve: Safeguards the water circuit against excessive inlet pressure. Opens at
2060 kPa, closes at 1470 kPa.
•
Electrical Fuse: (3A glass fuse) prevents against power surges.
•
Surge Protector: prevents against over-current.
•
Boil Dry Prevention: If water flow sensor detects no flow, gas supply is stopped.
•
Combustion Fan Speed Sensor: In case of combustion fan defect (no rotation of fan blades) gas supply
is stopped.
•
Temperature Cutout: If the delivered hot water temperature rises above the required delivery
temperature for a number of seconds, the gas supply is stopped.
Combustion Specifications
Refer to dataplate on the appliance.
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