Rinnai REU-V2632FFUG Service Manual page 7

Sensors and Safety Functions
• Hot Water Delivery Thermistor: Measures hot water temperature at the appliance outlet c onnec-
tion (i.e. the 'mixed' temperature).
• Flame Rod: Monitors combustion characteristics inside the combustion cha mber. If the flame fails,
gas supply is stopped.
• Overheat Switch: Situated on the heat exch anger, ga s supply is stopped when wate r temperature
reaches 97ºC for a number of seconds.
• Fusible Link: Situated on the he at 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 over-current.
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) 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
See dataplate on appliance.
Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - 2 - Issue 1 - 16/12/09 ©Rinnai