Rinnai RHFE-431WTA - Manual (Page 57)

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Flue Manifold
P.C.B
Combustion Fan
Room Temperature
Thermistor
Over Heat Thermistor
Solenoid Valve No.1
Modulating Valve
Gas Inlet
Solenoid Valve No.2 Injector
Damper
Main Burner
Over Heat Switch(No.2)
Warm Air
Main Heat
Exchanger
Sub Heat
Exchanger
Gas Filter
Convection Fan
Thermal Fuse
Over Heat
Switch
(No.1)
Flame Rod
Electrode
Over Heat Switch(No.3)
FLOW DIAGRAM