Abstract: A gas sensing system for an air conditioner unit is provided. The air conditioner unit includes a bulkhead that divides a cabinet into an indoor portion and an outdoor portion, and a compressor circulates refrigerant through a sealed system. An electrically protected housing is positioned within the indoor portion and defines a sensor enclosure for receiving a gas sensor for measuring a gas concentration of leaked refrigerant within the sensor enclosure. The housing includes vent apertures to permit leaked refrigerant to enter the sensor enclosure while the vent apertures are covered by filters to prevent contaminants from entering the sensor enclosure.

Abstract: A packaged terminal air conditioner unit includes a bulkhead and a sealed system mounted at least partially within a wall sleeve. The wall sleeve is positioned in an opening on the side of a building and defines an intake aperture and an exhaust aperture that fluidly couple the outdoor portion to the room. An intake fan assembly is mounted to the wall sleeve over the intake aperture for selectively urging a flow of make-up air into the room and an exhaust fan assembly if mounted to the wall sleeve over the exhaust aperture for selectively urging a flow of exhaust air out of the room.

Abstract: A packaged terminal air conditioner unit (PTAC) includes a bulkhead that defines an indoor portion and an outdoor portion. An outdoor fan is positioned within the outdoor portion and a controller is communicatively coupled with the outdoor fan for receiving a command to generate white noise and operating the outdoor fan to create the white noise at a desired decibel level to block out ambient sounds. A user may regulate the outdoor fan speed when the PTAC is not heating or cooling by setting a desired decibel level, e.g., using a control panel of the PTAC.

Abstract: A single-package air conditioning appliance includes a housing defining an outdoor portion and an indoor portion. An outdoor heat exchanger assembly is disposed in the outdoor portion. The outdoor heat exchanger assembly includes an outdoor heat exchanger and an outdoor fan. An indoor heat exchanger assembly is disposed in the indoor portion. The indoor heat exchanger assembly includes an indoor heat exchanger and an indoor fan. A compressor is in fluid communication with the outdoor heat exchanger and the indoor heat exchanger to circulate a refrigerant between the outdoor heat exchanger and the indoor heat exchanger. The single-package air conditioner unit also includes a make-up air module mounted on an external surface of the housing.

Abstract: An air conditioner unit includes a compressor, an exterior coil, a main interior coil, a main expansion device, a reheat interior coil and a reheat expansion device. The reheat interior coil is positioned adjacent the main interior coil. The main expansion device is connected in series between the exterior coil and the main interior coil, and the reheat expansion device is connected in series between the main expansion device and the reheat interior coil. A reheat valve is operable to selectively adjust a flow direction through the reheat interior coil. The reheat valve is a four-way valve, and one port of the four-way valve is blocked.

Abstract: A packaged terminal air conditioner unit (PTAC) includes an auxiliary fan configured for urging a flow of make-up air from the outdoor portion into the indoor portion through a vent aperture defined by a bulkhead. A vent door is pivotally mounted over the vent aperture and a flow restrictor extends into the flow of make-up air, the flow restrictor being movable in correlation to a flow rate of the flow of make-up air to increase the flow restriction at higher flow rates of make-up air.

Abstract: A packaged terminal air conditioner unit includes a bulkhead and a sealed system mounted at least partially within a wall sleeve. The wall sleeve is positioned in an opening on the side of a building and defines an intake aperture and an exhaust aperture that fluidly couple the outdoor portion to the room. An intake fan assembly is mounted to the wall sleeve over the intake aperture for selectively urging a flow of make-up air into the room and an exhaust fan assembly if mounted to the wall sleeve over the exhaust aperture for selectively urging a flow of exhaust air out of the room.

Abstract: An air conditioner unit includes a sealed system having an outdoor heat exchanger, a reheat heat exchanger, and an indoor heat exchanger in serial flow communication with each other. A first expansion device is positioned between the outdoor heat exchanger and the reheat heat exchanger and a second expansion device is positioned between the reheat heat exchanger and the indoor heat exchanger. A bypass loop routes the flow of refrigerant around the second expansion device when the flow of refrigerant is passing from the indoor heat exchanger to the reheat heat exchanger (i.e., in a heat pump mode), but directs that flow of refrigerant through the second expansion device when the flow of refrigerant is passing from the reheat heat exchanger to the indoor heat exchanger (i.e., in an air conditioning mode).

Abstract: Air conditioner units and methods for operating air conditioner units are provided. A method includes determining a steady state speed of a blower fan of the air conditioner unit. The method further includes receiving a call for heating and activating the blower fan in response to the call for heating. The method further includes measuring a speed of the blower fan after activating the blower fan and comparing the measured speed of the blower fan to the steady state speed of the blower fan. When the measured speed of the blower fan is greater than the steady state speed of the blower fan, the method includes disabling one of a plurality of heater banks of a heating unit of the air conditioner unit.

Abstract: A method for operating a packaged terminal air conditioner includes activating a compressor of the packaged terminal air conditioner such that refrigerant flows through an interior coil of the packaged terminal air conditioner, and, while the compressor is active, periodically cycling a fan of the packaged terminal air conditioner between a low speed active operating state and an inactive operating state. The fan runs at a modulated speed limit of the fan in the low speed active operating state, and the fan is unpowered in the inactive operating state.

Abstract: A packaged terminal air conditioner unit (PTAC) and methods for operating the same are provided. A PTAC controller is operably coupled to a proximity indication device for detecting that a proximity trigger condition exists and is configured for adjusting an operating parameter of the PTAC to adjust an outlet temperature of a flow of discharge air in response to determining that the proximity trigger condition exists. The proximity trigger condition may exist when a proximity sensor detects an occupant close to the PTAC, when a user input button is activated, or when a voice command is received.

Abstract: Air conditioner units and methods for operating air conditioner units are provided. A method includes determining a steady state speed of a blower fan of the air conditioner unit. The method further includes receiving a call for heating and activating the blower fan in response to the call for heating. The method further includes measuring a speed of the blower fan after activating the blower fan and comparing the measured speed of the blower fan to the steady state speed of the blower fan. When the measured speed of the blower fan is greater than the steady state speed of the blower fan, the method includes disabling one of a plurality of heater banks of a heating unit of the air conditioner unit.

Abstract: Air conditioner units and methods for operating air conditioner units are provided. A method includes determining a benchmark control signal corresponding to a predetermined speed of a fan of the air conditioner unit. The method further includes activating a heating unit of the air conditioner unit. The heating unit includes a plurality of heater banks. The method also includes activating the fan while the heating unit is active and measuring a control signal to the fan after activating the fan. The method further includes comparing the measured control signal to the benchmark control signal, and disabling one of the plurality of heater banks when the measured control signal is less than the benchmark control signal.

Abstract: A water heater tank has several components formed of a one-piece seamless construction. The water heater tank includes a cylindrical wall with inner and outer surfaces. A helical condenser channel may be formed in the outer surface of the cylindrical wall. The water heater includes a cold water inlet. A cold water channel may be formed in the inner surface of the cylindrical wall in fluid communication with the cold water inlet and the interior volume of the tank.

Abstract: An air conditioner unit includes a compressor, an exterior coil, a main interior coil, a main expansion device, a reheat interior coil and a reheat expansion device. The reheat interior coil is positioned adjacent the main interior coil. The main expansion device is connected in series between the exterior coil and the main interior coil, and the reheat expansion device is connected in series between the main expansion device and the reheat interior coil. A reheat valve is operable to selectively adjust a flow direction through the reheat interior coil. The reheat valve is a four-way valve, and one port of the four-way valve is blocked.

Abstract: A packaged terminal air conditioner unit (PTAC) and methods for operating the same are provided. A PTAC controller is operably coupled to a proximity indication device for detecting that a proximity trigger condition exists and is configured for adjusting an operating parameter of the PTAC to adjust an outlet temperature of a flow of discharge air in response to determining that the proximity trigger condition exists. The proximity trigger condition may exist when a proximity sensor detects an occupant close to the PTAC, when a user input button is activated, or when a voice command is received.

Abstract: A sealed heat exchange system and air conditioner are provided herein. The sealed heat exchange system may include a compressor, a heat exchanger, a line filter, a variable electronic expansion device, a primary fluid path, and an alternate fluid path. The compressor may generally increase a pressure of a flowed refrigerant within the sealed heat exchange system. The heat exchanger may be in fluid communication with the compressor and the line filter may be in fluid communication with the heat exchanger. The primary fluid path may define a fluid inlet to receive the flowed refrigerant downstream of the heat exchanger and upstream of the expansion device. The alternate fluid path may define a fluid inlet to receive the flowed refrigerant downstream of the variable electronic expansion device and upstream of the heat exchanger.

Abstract: A split system water heater includes a storage tank and a separate power module for heating water outside of the tank. A distribution tube provides high volume, low velocity flow of water between the tank and the power module to avoid or limit mixing and maintain thermal stratification within the tank. The distribution tube includes a longitudinal axis and a plurality of openings generally perpendicular to the longitudinal axis.

Abstract: A method for operating a packaged terminal air conditioner includes activating a compressor of the packaged terminal air conditioner such that refrigerant flows through an interior coil of the packaged terminal air conditioner, and, while the compressor is active, periodically cycling a fan of the packaged terminal air conditioner between a low speed active operating state and an inactive operating state. The fan runs at a modulated speed limit of the fan in the low speed active operating state, and the fan is unpowered in the inactive operating state.

Abstract: A heat pump water heater appliance includes an electronic mixing valve. The electronic mixing valve is positioned within a casing of the heat pump water heater appliance. A mixed water conduit and a heated water conduit of the electronic mixing valve may be positioned coaxially with each other, and a cold water conduit of the electronic mixing valve may be oriented such that the cold water conduit extends orthogonal to the heated water conduit and the mixed water conduit. A plunger is positioned within the valve body at the mixing chamber of the valve body. A motor is coupled to the plunger, the motor being operable to adjust a position of a head of the plunger within the valve body.