Abstract: Exemplary embodiments are disclosed that include multi-voltage contactors, controls, and related methods.

Abstract: Exemplary embodiments are disclosed that include multi-voltage contactors, controls, and related methods.

Abstract: Exemplary embodiments are disclosed that include multi-voltage contactors, controls, and related methods.

Abstract: A temperature control system and a method of controlling air conditioning in a multi-zone structure are disclosed. The temperature control system includes a forced-air primary conditioning unit including an air return duct, an air supply duct, and a circulator. The temperature control system also includes a secondary combustion heat source that operates independently of the forced-air primary conditioning unit, a smart circulator thermostat, and a remote temperature sensor. The at least one memory device includes executable instructions that when executed by the at least one processor cause the processor to receive a temperature value representative of a temperature of the structure, receive an indication of an operation of the secondary combustion heat source, generate a circulator operation signal based on a comparison of the received temperature value to a selectable temperature setpoint, and the received indication of an operation of an independent secondary combustion heat source.

Abstract: A system and method of detecting occupancy of a conditioned space are provided. The method includes controlling an environmental parameter of the conditioned space to a first selectable value using a first output signal of a process controller. The process controller configured to receive an indication of the environmental parameter of the conditioned space. The method also includes receiving a first indication of occupancy of the conditioned space using a passive occupancy sensor, receiving a second indication of occupancy of the conditioned space using an active occupancy sensor, and determining an occupancy state of the conditioned space based on a correlation between the first indication of occupancy and the second indication of occupancy. The method further includes controlling the environmental parameter of the conditioned space to a second selectable value based on the determined occupancy state.

Abstract: A method of operating a remote wireless sensor that is part of a control system for an HVAC system serving a space is disclosed. The remote wireless sensor is capable of operating in at least a first higher power mode and a second lower power mode. The method includes wirelessly transmitting a signal to the remote wireless sensor to cause the sensor to operate in the second lower power mode upon detecting the absence of an occupant in the space.

Abstract: Exemplary embodiments are disclosed of a relay switch control configured for connection between a power source and a load. The control includes a processor having a clock upon which an operating frequency of the processor is based, and a sealed relay operable by the processor to electrically connect or disconnect the power source and the load. The relay switch control can start power to the load through the relay after a randomized time delay determined by the processor using a value of a counter of the processor. The counter is updated as a function of cycles of the clock.

Abstract: Exemplary embodiments are disclosed of a relay switch control configured for connection between a power source and a load. The control includes a processor having a clock upon which an operating frequency of the processor is based, and a sealed relay operable by the processor to electrically connect or disconnect the power source and the load. The relay switch control can start power to the load through the relay after a randomized time delay determined by the processor using a value of a counter of the processor. The counter is updated as a function of cycles of the clock.

Abstract: A control is provided that includes a sensor that provides an output indicative of a sensed temperature of a condenser coil of the heat pump, and a controller for controlling activation of at least a compressor of the heat pump. The controller is configured to compare the output of the sensor to a representation of sensed ambient temperature to determine whether the reversing valve is in heat mode where the sensed ambient temperature exceeds the sensed temperature of the condenser coil, or in cool mode where the sensed ambient temperature is less than the sensed temperature of the condenser coil. The controller is further configured to deactivate at least the compressor of the heat pump when the reversing valve is determined to be in a mode that is inconsistent with the heat pump's heating operation or cooling operation.