Claims
- 15. A control system for a direct fire gas burner comprising:
a modulating valve for controlling gas output to the burner; a control for providing a low fire start gas condition above a minimum firing rate; one of a space temperature selector and discharge temperature sensor; a simulated resistance circuit capable of driving the modulating valve to an open setting in response to a resistant setting; the simulated resistant circuit comprising;
a first bypass circuit which bypasses said space temperature selector, said first bypass circuit including contacts to selectively open and close said first bypass circuit; and a second bypass circuit which bypasses said discharge temperature sensor; said second bypass circuit including contacts to selectively open and close said second bypass circuit.
- 16. The control system of claim 15 and further comprising:
a simulated resistance circuit to bypass the discharge temperature sensor and the space temperature selector, the simulator resistance circuit capable of driving the modulating valve to an open setting, the simulator resistance circuit capable of the open setting of the modulating valve in response to a resistance setting.
- 17. A control system for a direct gas fired burner comprising:
a modulating valve for controlling gas output to the burner; a control for providing a low fire start gas condition above a minimum firing rate; one of a space temperature selector and discharge temperature sensor; a simulated resistance circuit capable of driving the modulating valve to an open setting in response to a resistant setting; and wherein a change in the resistant setting changes a voltage to the modulating valve thereby actuating the modulating valve to obtain a desired gas flow.
- 18. The control system of claim 17 and further comprising an isolated direct current voltage source, the isolated voltage source capable of bypassing a normal voltage input to the modulating valve thereby actuating the modulating valve in response to a change in voltage of the isolated direct current voltage source.
- 19. A control system for a direct gas fire burner comprising:
a modulating valve for controlling gas output to the burner; a control for providing a low fire start gas condition above a minimum firing rate; one of a space temperature selector and discharge temperature sensor; a stepper motor, the stepper motor capable of actuating the modulating valve to a pre selected number of open or close steps to obtain a desired gas flow.
- 20. The control system of claim 19 and further comprising a microprocessor to control the stepper motor.
- 21. The control system of claim 15 and further comprising an intermediate limit switch, the intermediate limit switch capable of opening the modulating valve to pre selected degrees of openness so as to control a gas flow rate.
- 22. The control system of clam 21 wherein the intermediate limit switch is mounted upon an adjustable mechanism to provide for pre-selected adjustments of the gas flow rate.
- 23. The control system of claim 22 and further comprising a variable frequency drive system for vary in air flow through the burner, the variable frequency drive system capable of controlling gas flow through the modulating valve in response to an air flow measurement.
- 24. The control system of claim 23 wherein the variable frequency drive system is capable of controlling gas flow through the modulating valve in response to a speed of the variable frequency drive system.
- 25. The control system of claim 15 and further comprising an adjustable bypass gas flow arrangement which can be adjusted to provide a proper flow of gas during an ignition cycle.
- 26. The control system of claim 15 wherein at least one of set first and second bypass circuits includes a resistor.
- 27. The control system of claim 26 wherein both said first and second bypass circuits includes a resistor.
- 28. The control system of claim 26 wherein said resistor is a variable resistor.
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application is a continuation of non-provisional patent application having Ser. No. 09/574,338, filed on May 20, 2000 and based upon a provisional patent application having Serial No. 60/135,067, filed on May 20, 1999, which is owned by the same inventor.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60135067 |
May 1999 |
US |
Continuations (1)
|
Number |
Date |
Country |
Parent |
09574338 |
May 2000 |
US |
Child |
10223556 |
Aug 2002 |
US |