Infinity REU-V3232W / HD250E REU-V3232WC - 3 - Issue 1 - 8/09/03 ©Rinnai
Sensors and Safety Devices
• Heat Exchanger Thermistor: Measures hot water temperature at heat exchanger outlet. If water
temperature reaches a predetermined limit, gas supply is stopped.
• Hot Water Delivery Thermistor: Measures hot water temperature at the outlet valve (i.e. the ‘mixed’
temperature).
• 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 97 C for a number of seconds.
• Fusible Link: Situated on the heat exchanger, electrical power supply is stopped if the temperature
exceeds 129 C.
• Water Pressure Relief Valve: Safeguards the water circuit against excessive inlet pressure. Opens at
21.0 bar, closes at 15.0 bar.
• 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
* * The TPP is measured with the cover ‘off’ the appliance at the regulator test point with supply pressures
of 20 mbar (NG) and 37 mbar (Propane).
Gas Type Injector
Size (mm)
Nominal TPP (mbar) * * Gas Input (kW)
Low High Low High
Natural
1.05
1.8 7.4 5.6 69
1.65
Propane
0.65
3.5
5.6 69
0.95
°
°
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