Abstract: A working-fluid circuit may include an indoor heat exchanger, a variable-capacity compressor and a control module. The variable-capacity compressor pumps working fluid through the indoor heat exchanger. The control module may control the compressor and operate the compressor in one of a first capacity mode and a second capacity mode based on a demand signal, outdoor-air-temperature data and a compressor runtime.

Abstract: A climate-control system may include a variable-capacity compressor unit and a control module controlling the compressor unit. The compressor unit may be operable in a first capacity mode and in a second capacity mode that is higher than the first capacity mode. The control module may be configured to switch the compressor unit among a shutdown state, the first capacity mode and the second capacity mode based on a demand signal and outdoor-air-temperature data.

Abstract: A working-fluid circuit may include an indoor heat exchanger, a variable-capacity compressor and a control module. The variable-capacity compressor pumps working fluid through the indoor heat exchanger. The control module may control the compressor and operate the compressor in one of a first capacity mode and a second capacity mode based on a demand signal, outdoor-air-temperature data and a compressor runtime.

Abstract: A climate-control system may include a variable-capacity compressor unit and a control module controlling the compressor unit. The compressor unit may be operable in a first capacity mode and in a second capacity mode that is higher than the first capacity mode. The control module may be configured to switch the compressor unit among a shutdown state, the first capacity mode and the second capacity mode based on a demand signal and outdoor-air-temperature data.

Abstract: A fluid heater and a method for evaluating and displaying hot fluid supply time are disclosed. The system includes a fluid container, a controlling unit, a computational element, and a display means. The fluid container includes a cold fluid inlet means, a hot fluid outlet means, a first heating element, a second heating element, a first temperature sensor and a second temperature sensor. The controlling unit is adapted to selectively activate and deactivate one of the first heating element and the second heating element based on the inputs received from the said sensors. The computational element is adapted to compute the hot fluid supply time at a pre-determined set temperature based on at least one input received from said sensors, capacity of said fluid container, and flow rate of fluid to and from said fluid container. The display means is adapted to display the computed supply time.