Control system for hydronic heater and method of operating same
AssigneeInternational Thermal Investments Ltd.
InventorsNader Kiarostami, Farzin Akhoundsadegh
Life of this patent
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Abstract
A control system for a burner assembly used in vehicles and boats particularly for a coolant storage type heater and a method of operating the control system. Resistors for producing a resistance change as a function of temperature are utilised to send temperature signals to the control system from both the coolant and the potable water by being in contact with coolant and potable water throughout burner operation. The use of the thermistor signals together with the signals from aquastats allows flexible heater operation and may be dependent upon the user where commands can be entered in a touch screen connected to the control board of the control system.
Claims19
A hydronic heating system comprising a source of potable water, a coolant reservoir to hold coolant, a heat exchanger to exchange heat between said coolant and said potable water, a thermistor to sense the temperature of coolant in said coolant reservoir and to send a signal corresponding to said temperature sensed to said control system, a burner assembly controlled by said control system to apply heat to said coolant, said control system initiating or terminating combustion within said burner assembly thereby to regulate the heat applied to said coolant in said coolant reservoir.
A temperature sensing system comprising a coolant tank, a coolant line extending from said coolant tank to a heat exchanger and an temperature sensing device mounted on said heat exchanger.
A method of controlling a hydronic heating system comprising heating a source of coolant by a burner, passing coolant from a source of said coolant through a heat exchanger under the direction of a control system, measuring the temperature of said coolant by a thermistor being a resistor producing an electrical signal responsive to changes of resistance by the change of temperature in said coolant, processing said electrical signal in said control system and producing an output signal from said control system to said burner to commence, continue or terminate said heating of said coolant.
Dependencies are inferred from the claim text.