WATER HEATER SYSTEM OPERATION [MANUAL AIR CONDITIONER]
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Starting/stopping Conditions
• The water heater system will start to operate when all of the following conditions are met:
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― Ambient temperature less than 7 °C {45 °F}.
― Water temperature less than 60 °C {140 °F}.
― Engine revolutions more than 501 rpm.
• The water heater system will stop to operate when all of the following conditions are met:
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― Ambient temperature more than 12 °C {54 °F}.
― Engine revolutions less than 400 rpm.
Normal Operation
• The CPU in the water heater unit outputs a signal to blower fan and fuel pump, which then deliver air and fuel to the unit.
• Within the unit, fuel is vaporized and mixed with air, and then sent to the combustion chamber.
• The mixture is ignited, by a spark from the glow plug, in the combustion chamber.
• Engine coolant temperature is raised as it circulates along the outside of the combustion chamber.
Full/half Switching
• Depending on the engine coolant temperature, the CPU sets the flame to higher full or half strength settings.
