Integrated furnace control
First Claim
Patent Images
1. An HVAC controller comprising a controller including:
- a first input;
a second input;
first means, responsive to a signal received on the first input, for generating a first mode of operation;
second means, responsive to a signal received on the second input, for generating a second mode of operation; and
third means, responsive to the substantially simultaneously receipt of a signal on the first and second inputs, for generating a third mode of operation.
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Abstract
An HVAC controller including a first input; a second input; first means, responsive to a first signal received on the first input, for generating a first mode of operation; second means, responsive to a second signal received on the second input, for generating a second mode of operation; and third means, responsive to a third signal received substantially simultaneously on the first and second inputs, for generating a third mode of operation.
89 Citations
14 Claims
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1. An HVAC controller comprising a controller including:
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a first input; a second input; first means, responsive to a signal received on the first input, for generating a first mode of operation; second means, responsive to a signal received on the second input, for generating a second mode of operation; and third means, responsive to the substantially simultaneously receipt of a signal on the first and second inputs, for generating a third mode of operation. - View Dependent Claims (2, 3, 4)
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5. A furnace system comprising:
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a furnace having a first stage and a second stage; a furnace controller operably connected to and controlling the furnace, the furnace controller having a first input for initiating the operation of the first furnace stage and a second input for initiating the operation of the second furnace stage; a thermostat including means to generate a call for heat; a single control line operably interconnecting the thermostat and the furnace controller; an electrical short across the first and second furnace inputs to generate a simultaneous electrical signal in response to the call for heat from the thermostat; and means, operably associated with the furnace controller, for automatically configuring itself to a mode of operation depending upon the timing of signals received at the first and second control inputs. - View Dependent Claims (6, 7, 8)
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9. A method of controlling a two stage or two speed HVAC system having a first control input and a second control input comprising the steps of:
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monitoring the first and second control inputs for signals; configuring a first mode of operation based upon the presence of non-simultaneous signals received on either or both of the first and second control inputs; operating the HVAC system in the first mode of operation; configuring a second mode of operation based upon the presence of substantially simultaneous signals on the first and second control inputs; and operating the HVAC system in the second mode of operation. - View Dependent Claims (10, 11, 12, 13)
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14. A method of configuring a two stage furnace in response to signals received on a first control line and a second control line comprising the steps of:
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determining the presence or absence of signals on the first and second control lines; determining if signals received on the first and second control lines are non-simultaneous; establishing a first mode of operation in response to a signal on the first control line and the absence of a signal on the second control line; and establishing a second mode of operation in response to substantially simultaneous signals on the first and second control lines.
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Specification