Lennox Industries Inc.

Rosa Maria Leal

Harold Gene Havard, Jr

Der-Kai Hung

Anuradha Sundararajan

Alan Edens Bennett

Rakesh Goel

Farhad Nick Abrishamkar

Anna Vishinsky

Thomas Edward Pate, Jr

John Manby

Krag Wilson Mercer

Darko Hadzidedic

Stephen A Walter

Jimmie Lee Curry

William Toombs, Jr

Steven C Brown

Thomas Edward Pate

According to one embodiment, a system includes a first and second cooling system, an automation controller, one or more sensors, and a hardware controller separate from the automation controller. The hardware controller processes various temperature set points in conjunction with a timer and configures the activation or deactivation of the first and second cooling systems accordingly.

Automated climate control system with override

Provided are a method and apparatus for verifying or correcting the temperature sensor and compressor pairings within the HVAC system control logic, indicating that a sensor is logically paired with the specific compressor, from amongst a tandem compressor group, to which the sensor is coupled.

Sensor coupling verification in tandem compressor units

According to one embodiment, a system includes at least one of a cooling system and a heating system, an automation controller, a sensor, and a switch. The automation controller provides a first input indicating a first temperature set point. The sensor detects a temperature of a second space proximate the sensor and provides a second input indicating the temperature of the second space and a second temperature set point. The switch activates at least one of the cooling system and the heating system based on the second temperature set point in response to a determination that the second input overrides the first input.

A method of controlling operations of an HVAC system includes measuring temperature within an enclosed space, receiving a setpoint temperature within the enclosed space, calculating a temperature difference between the measured temperature and the received setpoint temperature, and determining whether the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to a first predetermined temperature differential value. If the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to the first predetermined temperature differential value, determining whether the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to a second predetermined temperature differential value. If the temperature difference between the measured temperature and the received setpoint temperature is less than the second predetermined temperature differential value, selecting a first operating mode of a plurality of operating modes of the HVAC system.

Systems and methods for variable control and operation of HVAC components

Provided are a method and apparatus for reducing a refrigerant pressure difference within are HVAC system having a controller, one or more compressors, and at least two paths of refrigerant piping comprising alternative paths for refrigerant flow through the HVAC system. A valve is coupled to each refrigerant piping path for permitting, or preventing, refrigerant flow through each of the alternate paths of refrigerant piping. The controller may open at least one valve for a defined period of time in response to a triggering input to allow a refrigerant pressure difference within the HVAC system to dissipate across the opened valve.

Solenoid control methods for dual flow HVAC systems

An HVAC system, comprising a plurality of sensors, a tandem compressor comprising a first compressor and a second compressor, and a controller communicatively coupled to the plurality of sensors and the tandem compressor. The controller may determine a first interruption of power to the tandem compressor and identify a sensor corresponding to the first interruption of power. The controller is further operable to determine that the first interruption of power was caused at least in part by the refrigerant associated with the first compressor exceeding a tolerance condition. The controller may also reconfigure the tandem compressor, wherein on or off settings of the first compressor and the second compressor are determined based on a required load operation of the tandem compressor and the determination that the first interruption of power was caused at least in part by the refrigerant associated with the first compressor exceeding the tolerance condition.

Tandem compressor discharge pressure and temperature control logic

The present invention provides for a system for operating a heating, ventilation, and air conditioning (HVAC) system. A controller operates compressors in tandem connected to an evaporator. In response to detection of a pre-freezing condition of in the coils of the evaporator, the controller adjusts an operating condition of the HVAC system.

System for operating an HVAC system having tandem compressors

Provided are a method and apparatus for reducing a refrigerant pressure difference within an HVAC system having a controller, one or more compressors, and at least two paths of refrigerant piping comprising alternative paths for refrigerant flow through the HVAC system. A valve is coupled to each refrigerant piping path for permitting, or preventing, refrigerant flow through each of the alternate paths of refrigerant piping. The controller may open at least one valve for a defined period of time in response to a triggering input to allow a refrigerant pressure difference within the HVAC system to dissipate across the opened valve.

The present invention provides for a control system for operating a heating, ventilation, and air conditioning (HVAC) system. A controller operates compressors in tandem. In response to detection of a high pressure condition in refrigerant flowing through a high pressure side of the HVAC system, the controller operates the HVAC system with a first compressor on and a second compressor off.

System for controlling operation of an HVAC system having tandem compressors

Systems and methods involve controlling a variable-speed blower in a heating, ventilating, and air conditioning (HVAC) system to ensure the setting of a blower-proving switch to confirm airflow in a building. In one instance, a method involves ramping up the variable-speed blower so that the associated static pressure reaches a making point pressure of the blower-proving switch and then reducing the power to a desired power level. The method may also include maintaining the power level above a breaking point pressure. Other systems and methods are presented.

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Irving, TX, United States of America

Rosa Maria Leal