Abstract: The present disclosure relates to a heating, ventilation, and/or air conditioning (HVAC) system including a controller configured to detect a presence of an occupant in a zone of a plurality of zones. The controller is also configured to determine a priority level of the occupant and control operation of the HVAC system to prioritize supply of conditioned air to the zone of the plurality of zones over remaining zones of the plurality of zones based on the priority level of the occupant.

Abstract: An HVAC system includes, an electronic expansion valve (EEV), and a controller in communication with the EEV. The controller determines a minimum EEV setpoint position value based on a comparison of a superheat error value to a setpoint error threshold. The controller determines a maximum EEV setpoint position value based on a comparison of a second superheat error value to a second setpoint error threshold. The controller calculates an average setpoint value based on the maximum EEV setpoint position value and the minimum EEV setpoint position value. The controller configures the EEV to a position corresponding to the average setpoint value and operate the EEV for a predetermined amount of time. The controller operates the EEV according to a PID algorithm.

Abstract: A system for heating a building via refrigerant includes a coil temperature sensor, an ambient temperature sensor, and a controller. The controller includes a processing circuit configured to record a system operating parameter and a control step of a control process before performing a sacrificial defrost cycle. The processing circuit is configured to cause the system to perform the sacrificial defrost cycle and operate the system at predefined system operating parameters other than the recorded system operating parameters. The system is configured to cause the system to operate at the recorded system operating parameters and generate calibration data in response to the sacrificial defrost cycle ending. The processing circuit is configured to cause the control process to operate at the recorded control step and cause the system to perform a defrost cycle based on the calibration data, the coil temperature, and the ambient temperature.

Abstract: A climate management system includes a conditioning unit having a reversible fan and an enclosure. The enclosure separates an inner space of the enclosure from an external environment while allowing air flow therethrough. The reversible fan is configured to be turned by a fan motor in a first circumferential direction to pull air from the external environment into the inner space of the enclosure. The climate management system includes a monitoring system configured to monitor operational characteristics of the climate management system, and to communicate data feedback corresponding to the operational characteristics. The climate management system includes a controller configured to instruct, based on analysis of the data feedback, the fan motor to turn in a second circumferential direction opposite to the first circumferential direction to push air from the inner space into the external environment.

Abstract: The present disclosure includes a heating, ventilation, and air conditioning (HVAC) system having a control system suitable to control operation of a device in the HVAC system. The control system may include a zone control panel that may control operation of the device using power-line communication. Accordingly, the zone control panel and the device may be both communicatively and electrically coupled via one or more power lines. To that end, the zone control panel may determine a primary address identifying the device and/or a secondary address indicating the one or more power lines electrically coupled to the device. Further, the zone control panel may communicate with and/or coordinate operation of the device by transmitting data messages to the device via the one or more power lines based on the primary address and/or the secondary address.

Abstract: The present disclosure presents techniques for improving operational efficiency of climate control systems. A climate control system may include climate control equipment, a sensor that measures temperature in a building, and a control system that controls operation of the equipment using a first temperature schedule, which associates each time step with a temperature setpoint, when the building is occupied.

Abstract: The present disclosure includes techniques that enable a conditioned air system to automatically restore functionality and/or to operate at reduced functionality when a fault is detected, for example, to facilitate reducing likelihood that continuing operation with the fault present will decrease lifespan of the conditioned air system. To facilitate improving operation of the conditioned air system when a fault is present, the control system of the conditioned air system may utilize substitute sensor data and/or adjust its control algorithm. In this manner, the control system may facilitate improving operational reliability and/or availability of the conditioned air system, for example, by adaptively adjusting its operation to enable the conditioned air system to continue operating even when a fault is present, while reducing likelihood that the continued operation will reduce lifespan of the conditioned air system.

Abstract: A heating and cooling system includes a reversing valve configured to adjust a flow of refrigerant through the heating and cooling system, where the reversing valve includes a first configuration to flow the refrigerant through a first circuit of the heating and cooling system and a second configuration to flow the refrigerant through a second circuit of the heating and cooling system. The heating and cooling system also includes a controller configured to determine an operating parameter of a compressor of the heating and cooling system, where the controller is configured to adjust operation of the compressor based on the operating parameter to adjust a position of the reversing valve.

Abstract: The present disclosure includes systems and methods for determining dimensions, shapes, and locations of rooms of a building using a mobile device for controlling heating, ventilation, and air conditioning (HVAC) provided to the rooms and building. A measuring device receives a shape of a room in the building and determines a dimension set of the room based on the shape of the room. The measuring device transmits the shape of the room and the dimension set to a mobile device that determines a layout of the building based on the shapes and the dimension sets corresponding to the rooms of the building. In this manner, the systems and methods provide the layout of the building more efficiently, resulting in an improved HVAC system installation and operation process.

Abstract: A heating, ventilation, and air conditioning (HVAC) system may include a HVAC unit that may control air flow, a first control system that may directly control operation of equipment in the HVAC unit, and a second control system communicatively coupled to the first control system. The second control system may be located in a different zone of a building as compared to the first control system, such that the second control system may receive a request to adjust the air flow output by the HVAC unit and send a command to the first control system based on the request. The command may cause the first control system to adjust the operation of the equipment in the HVAC unit to cause the air flow output by the HVAC unit to be adjusted according to the request.

Abstract: The present disclosure relates to a passive refrigerant charge management system including a charge vessel configured to fluidly couple to a refrigerant circuit. The charge vessel includes a first portion having a compressible fluid and a second portion configured to contain refrigerant of the refrigerant circuit, wherein an amount of the refrigerant contained in the second portion is based on a first pressure of the refrigerant within the refrigerant circuit and a second pressure of the compressible fluid.

Abstract: A controller for a heating, ventilation, and air conditioning (HVAC) system is configured to receive a first feedback from a first sensor of the HVAC system and receive a second feedback from a second sensor of the HVAC system. The controller is configured to determine a saturated parameter corresponding to a working fluid based on the second feedback. Additionally, the controller is configured to transmit an indication in response to determining that the saturated parameter has a threshold correlation to the first feedback.

Abstract: An integrated heat pump and water heating circuit for space heating and cooling and heating domestic water. The circuit includes a first heat exchanger for the domestic water, a second heat exchanger for the source, a third exchanger for the space, and a variable capacity compressor. The circuit has four modes of operation. In the first mode, the space is cooled. In the second mode, the space is heated. In the third mode, the circuit heats the water supply. In a fourth mode, the water supply is heated and the space is cooled simultaneously. The speed of the compressor is adjusted to maintain a pressure differential at or above a predetermined set point.

Abstract: An HVAC system includes, an electronic expansion valve (EEV), and a controller in communication with the EEV. The controller is configured to determine a minimum EEV setpoint position value based on a comparison of a superheat error value to a setpoint error threshold. The controller is further configured to determine a maximum EEV setpoint position value based on a comparison of a second superheat error value to a second setpoint error threshold. The controller is further configured to calculate an average setpoint value based on the maximum EEV setpoint position value and the minimum EEV setpoint position value. The controller is further configured to configure the EEV to a position corresponding to the average setpoint value and operate the EEV for a predetermined amount of time. The controller is further configured to operate the EEV according to a PID algorithm.

Abstract: A heating, ventilation, and air conditioning (HVAC) system includes an outdoor unit having a heat exchanger. The heat exchanger includes a coil configured to route refrigerant therethrough. The HVAC system also includes a motor configured to drive a fan, a motor controller configured to regulate operation of the motor, and a global controller configured to regulate operation of global aspects of the HVAC system. The HVAC system also includes a power sensor configured to detect a power parameter relating to a power input to the motor controller, a power output from the motor controller, or a power input to the motor, wherein the global controller is configured to receive data indicative of the power parameter from the power sensor, and wherein the global controller is configured to analyze the data indicative of the power parameter to detect a frozen coil condition, a fouled coil condition, or both.

Abstract: Systems and methods to control an electronic expansion valve (EEV) of a vapor compression system are described. A heating ventilation, and air conditioning (HVAC) system includes control circuitry having a sensor. The control circuitry sets a control setpoint of a vapor compression system such that an electronic expansion valve operates across a first operating range. The control circuitry receives a signal from the sensor indicative of an operating condition of the vapor compression system. The control circuitry adjusts the control setpoint based at least in part on the operating condition. The control circuitry controls operation of the electronic expansion valve based at least in part on the adjusted control setpoint, wherein the electronic expansion valve operates across a second operating range, different from the first operating range, at the adjusted control setpoint.

Abstract: A system for heating a building via refrigerant includes a coil temperature sensor, an ambient temperature sensor, and a controller. The controller includes a processing circuit configured to record a system operating parameter and a control step of a control process before performing a sacrificial defrost cycle. The processing circuit is configured to cause the system to perform the sacrificial defrost cycle and operate the system at predefined system operating parameters other than the recorded system operating parameters. The system is configured to cause the system to operate at the recorded system operating parameters and generate calibration data in response to the sacrificial defrost cycle ending. The processing circuit is configured to cause the control process to operate at the recorded control step and cause the system to perform a defrost cycle based on the calibration data, the coil temperature, and the ambient temperature.

Abstract: A heating, ventilation, and air conditioning (HVAC) system includes a controller associated with a residence. The controller is configured to determine an expected value range for an operating parameter of a component of the HVAC system. Additionally, the controller is configured to receive a signal from a sensor indicative of a current value of the operating parameter of the component and determine if the current value of the operating parameter is outside the expected value range. Based on the determination that the current value is outside the expected value range, the controller is additionally configured to initiate a diagnostic mode of the controller. In the diagnostic mode, the controller is configured to collect diagnostic data associated with the HVAC system.

Abstract: An outdoor unit for a building HVAC system includes one or more sensors configured to measure temperature and pressure values. The unit also includes a user interface coupled to the outdoor unit. The user interface is configured to display information to a user. The unit includes a controller including a processing circuit. The processing circuit configured to record the temperature values and the pressure values via the sensors and cause the user interface to display temperature values and pressure values.

Abstract: A residential HVAC system includes, a compressor, and an outdoor unit controller in communication with the compressor. The outdoor unit controller is configured to receive an indoor ambient temperature and a temperature set point. The outdoor unit controller is further configured to determine an outdoor ambient temperature, and to determine an operating value for the compressor based on a percentage of a delta between a minimum operating value of the compressor and a maximum operating value of the compressor, plus the minimum operating value. The minimum operating value and the maximum operating value are based on the determined outdoor ambient temperature. The percentage of the delta is based on a predefined temperature differential multiplier and one or more time dependent multipliers. The outdoor unit controller is further configured to modify the current operating value of the compressor with the determined operating value.