HVAC CONTROLLER WITH DELTA-T BASED DIAGNOSTICS
First Claim
1. An HVAC controller configured to control one or more components of an HVACsystem, the HVAC controller comprising;
- a user interface including a display;
a memory;
an I/O block for receiving one or more signals from the HVAC system and for providing one or more control signals to the HVAC system; and
a controller coupled to the memory, the user interface and the I/O block, the controller programmed to accept a delta T limit via the user interface of the HVAC controller;
the controller further configured to monitor one or more signals received via the I/O block to determine if the delta T limit has been violated, indicating a delta T fault, and to display on the display of the HVAC controller a user alert for at least some detected delta T faults.
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Accused Products
Abstract
An HVAC controller may store a delta T limit. The delta T limit may be, or may include, a maximum and/or a minimum delta T limit. The HVAC controller may compare a measured delta T value against a delta T limit to determine if the delta T limit has been violated. If the HVAC controller determines that a delta T limit has been violated, the HVAC Controller may log the violation, and in some cases, display a user alert on a display of the HVAC controller. In some cases, different delta T limits may be stored for each operating mode (e.g. heating and cooling), and in some cases, for each stage combination within an operating mode, where appropriate.
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Citations
20 Claims
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1. An HVAC controller configured to control one or more components of an HVAC
system, the HVAC controller comprising; -
a user interface including a display; a memory; an I/O block for receiving one or more signals from the HVAC system and for providing one or more control signals to the HVAC system; and a controller coupled to the memory, the user interface and the I/O block, the controller programmed to accept a delta T limit via the user interface of the HVAC controller; the controller further configured to monitor one or more signals received via the I/O block to determine if the delta T limit has been violated, indicating a delta T fault, and to display on the display of the HVAC controller a user alert for at least some detected delta T faults. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An HVAC controller configured to control one or more components of an HVAC
system, the HVAC controller comprising; -
a user interface including a display; a memory; an I/O block for receiving one or more signals from the HVAC system and for providing one or more control signals to the HVAC system; and a controller coupled to the memory, the user interface and the I/O block, the controller programmed to accept a delta T limit from a user via the user interface, the delta T limit corresponding to a selected HVAC operational mode of the HVAC system, the controller programmed to apply the delta T limit to each of two or more equipment stages that support the selected HVAC operational mode. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method of monitoring an HVAC system including one or more HVAC components that are controlled, at least in part, by an HVAC controller having a user interface including a display, a memory, and a controller, the method comprising:
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accepting a delta T limit for a selected HVAC operational mode of the HVAC system; and applying the delta T limit to each of two or more equipment stages that support the selected HVAC operational mode. - View Dependent Claims (18, 19, 20)
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Specification