Furnace, a high fire ignition method for starting a furnace and a furnace controller configured for the same
First Claim
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1. A method of operating a multistage gas furnace, comprising:
- receiving a heating call at the furnace;
determining if an indoor circulating fan of the furnace is active;
if the indoor circulating fan is active then;
igniting the furnace at a high fire operation; and
adjusting the furnace to an operating stage based on the heating call;
if the indoor circulating fan is not active then;
igniting the furnace at a low fire operation; and
allowing the multistage furnace to operate.
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Abstract
The disclosure provides a controller for a multistage gas furnace, a multistage gas furnace and computer readable medium for performing a method to operate a furnace. In one embodiment, the controller includes: (1) an interface configured to receive a heating call and (2) a corrosion reducer configured to ignite the gas furnace at a high fire operation based on if an indoor circulating fan of the gas furnace is active.
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Citations
20 Claims
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1. A method of operating a multistage gas furnace, comprising:
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receiving a heating call at the furnace; determining if an indoor circulating fan of the furnace is active; if the indoor circulating fan is active then; igniting the furnace at a high fire operation; and adjusting the furnace to an operating stage based on the heating call; if the indoor circulating fan is not active then; igniting the furnace at a low fire operation; and allowing the multistage furnace to operate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A multistage gas furnace having a heat exchanger, comprising:
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a burner assembly; an inducer configured to draw combustion air through said heat exchanger; a high fire pressure switch configured to close when flow of said combustion air has been established; a low fire pressure switch configured to indicate when combustion air pressure is sufficient to support a low fire operation of the furnace; an indoor circulating fan configured to move air across said heat exchanger and into conditioned space; a combustion air inducer configured to supply combustion air to the burner assembly; and a controller configured to direct operation of said furnace, the controller configured to ignite said furnace at a high fire operation based on if said indoor circulating fan is active. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of constructing a multistage gas furnace having a heat exchanger, comprising:
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providing an inducer configured to draw combustion air through said heat exchanger; providing a high fire pressure switch configured to close when flow of said combustion air has been established; providing an indoor circulating fan configured to move air across said heat exchanger and into conditioned space; and providing a controller configured to direct operation of said furnace, said controller including; an interface configured to receive a heating call; and a corrosion reducer configured to ignite said furnace at a high fire operation based on if said indoor circulating fan is active. - View Dependent Claims (20)
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Specification