Abstract: A liquid detector comprising a housing having a plurality of side walls and a bottom surface; a sensor mounted within a cavity of the housing and having a sensing surface configured to detect a liquid on an outer surface of a first of the plurality of side walls, and securing means to secure the housing relative to a surface of an external reservoir, wherein the plurality of side walls extends from a top end to a lower end, wherein the bottom surface has a profile comprising a first portion and a second portion, wherein the first portion and second portion are lower than the plurality of side walls, and wherein at least a lower-most point of the second portion is lower than at least one point of the first portion.

Abstract: The present application provides apparatus (15) for connection to an HVAC-R system during maintenance or commissioning. The apparatus includes a plurality of ports (16, 17, 18) for fluid connection to the HVAC-R system and to maintenance apparatus, for example a refrigerant tank, a refrigerant recovery unit and/or a vacuum pump. The apparatus also includes a plurality of fluid connections (20) between the plurality of ports, each of the plurality of fluid connections having an electrically actuatable valve (21) to open and close the fluid connection. The apparatus also includes a control unit configured to control each of the electrically actuatable valves to configure the plurality of fluid connections.

Abstract: The present invention relates to cleaning compositions, in particular to cleaning compositions for use in heating, ventilation and air-conditioning (HVAC) installations. We describe an acidic cleaning composition concentrate comprising: at least one acid having a pKa1 of 4 or less, wherein the at least one acid is at least one organic acid and/or non-oxidising mineral acid; a rheology modifier; and a polar protic solvent.

Abstract: A bracket for securing a device to an elongate structure, the bracket comprising a body configured to hold the device, and a securing element attached to the body. The securing element comprises a pair of bosses, each boss comprising a slot, a core and an end surface. The bosses are arranged on the securing element such that the end surfaces define a gap into which the elongate structure can be received when the securing element is in a first position relative to the elongate structure and the slots are configured to receive the elongate structure upon rotation of the securing element from the first position to a second position relative to the elongate structure. The bracket is secured to the elongate structure by a gripping inter-engagement of the elongate structure and the bosses of the securing element in said second position.

Abstract: The connection box of the present invention provides a simple and safe method to integrate an AC unit and condensate pump into a larger building management system. This is possible because the circuit is configured to require high water level sensors are connected to the connection box in order for power to be provided to operate the AC unit. An installer only has to connect the external wires of the AC unit, condensate pump and building management system to the respective designated connection terminals within the connection box. The designated terminal connections provide a clearly labelled instruction to an installer and aid safe and proper installation of AC units and remove the need to re-wire the internal wiring of the AC unit.

Abstract: The present invention provides a liquid level sensor and an automatic calibration process which removes the need for prior manual calibration of the liquid level sensor, as this happens dynamically during installation and use of the pump. Further, by frequently monitoring the calibration of the sensor and correcting for long term drift or contamination on the sensing surface, the reliability of the liquid level sensor is considerably better than those of the prior art. By operating a solid state sensor, there are no moving parts in the liquid level sensor described above.

Abstract: There is provided a condensate pump assembly (100) for use in an air conditioning system. The condensate pump assembly (100) comprises a pump (102) arranged in a housing (104) to pump liquid from a liquid inlet (116) towards a liquid outlet (106). The condensate pump assembly (100) further comprises a liquid receptacle (108) arranged, in a first position in the housing (104), to receive condensate from a condensate inlet (110) and to be in fluid communication with the liquid inlet (116). The liquid receptacle (108) is movable to a second position removed from the housing (104), whereby to empty the liquid receptacle (108). The condensate pump assembly (100) further comprises selective release (112, 114) means operable by a hand of a user to release the liquid receptacle (108) for movement from the first position towards the second position.

Abstract: A condensate pump assembly comprising: a housing having an inlet port, a reservoir arranged to receive liquid through the inlet port, and an outlet port having an outlet assembly mounted thereto, a pump arranged to pump liquid from reservoir to the liquid outlet assembly, and a pair of clips releasably connectable to the housing at a first pair of mounting portions and a second pair of mounting portions, wherein each of the pair of clips has a first portion for connecting to a first external element and a second portion for connecting to a second external element, wherein the pair of clips are configur the first external element when connected to the first pair of mou the pair of clips are configured to mount the housing to the sec connected to the second pair of mounting portions.

Abstract: A condensate pump assembly for use in an air conditioning system, the condensate pump assembly comprising: a pump arranged in a housing to pump liquid from a liquid inlet to a liquid outlet; a liquid receptacle configured to receive liquid from the liquid inlet; and suspension means configured to suspend the pump from a bottom surface of the housing. The suspension means are configured to substantially eliminate vibrations being transmitted from the pump to the housing.

Abstract: A pulsation damper for a condensate pump comprising a housing defining a fluid chamber having a liquid inlet connectable to an outlet of the condensate pump, an air inlet, and a liquid outlet, wherein the air inlet includes a one-way valve configured to selectively introduce air into the housing to maintain a first air pocket within the fluid chamber as liquid flows through the fluid chamber, wherein the liquid outlet is located outside the first air pocket, and wherein the air pocket is configured to dissipate pulsations within liquid entering the housing at the liquid inlet prior to the liquid discharging via the liquid outlet.

Abstract: The present disclosure comprises a method of controlling a condensate pump assembly which comprises a pump and a controller connected to the pump, the method comprising measuring a current value drawn by the pump, comparing the measured current value to a predetermined threshold current value and controlling operation of the condensate pump assembly based on the current value comparison. Also provided is a condensate pump assembly for use in an air conditioning system, comprising a housing comprising an upper housing portion and a pump arranged to pump liquid from a liquid inlet to a liquid outlet.

Abstract: The present invention provides a liquid level sensor and an automatic calibration process which removes the need for prior manual calibration of the liquid level sensor, as this happens dynamically during installation and use of the pump. Further, by frequently monitoring the calibration of the sensor and correcting for long term drift or contamination on the sensing surface, the reliability of the liquid level sensor is considerably better than those of the prior art. By operating a solid state sensor, there are no moving parts in the liquid level sensor described above.

Abstract: The present invention provides a liquid level sensor and an automatic calibration process which removes the need for prior manual calibration of the liquid level sensor, as this happens dynamically during installation and use of the pump. Further, by frequently monitoring the calibration of the sensor and correcting for long term drift or contamination on the sensing surface, the reliability of the liquid level sensor is considerably better than those of the prior art. By operating a solid state sensor, there are no moving parts in the liquid level sensor described above.

Abstract: A pump comprising a housing; a motor mounted in the housing and configured to drive a rotor mounted on a shaft connected to the motor, and a first connector and a second connector each secured to the housing. The first and second connectors are in fluid communication by a tube arranged in the housing. The first connector is configured to connect to a first fluid line and the second connector is configured to connect to a second fluid line. In use, the rotor is configured to urge fluid within the tube from the first connector to the second connector when driven by the motor. The first and second connectors are releasably secured to the housing.

Abstract: The present application provides a vacuum pump (15) for use during maintenance or commissioning of an HVAC-R system (1). The vacuum pump (15) has a pump (17) having a pump intake (22) for connection to the HVAC-R system (1), in particular one or more of a high pressure service port (14) and a low pressure service port (13) of the HVAC-R system (1). The vacuum pump (15) also includes a communications unit (19) that is configured to connect to a mobile communications network. The vacuum pump (15) also includes a pressure sensor arranged to detect a pressure in the HVAC-R system (1). The vacuum pump (15) also includes a control unit (18) configured to receive pressure data from the pressure sensor (21), control operation of the pump (17), and communicate with a remote device via the communication unit (19) and the mobile communications network. In examples, the remote device (20) may be a mobile phone or a tablet computer, or any device that can connect to a mobile communications network.

Abstract: A liquid detector comprising a housing having a plurality of side walls and a bottom surface; a sensor mounted within a cavity of the housing and having a sensing surface configured to detect a liquid on an outer surface of a first of the plurality of side walls, and securing means to secure the housing relative to a surface of an external reservoir, wherein the plurality of side walls extends from a top end to a lower end, wherein the bottom surface has a profile comprising a first portion and a second portion, wherein the first portion and second portion are lower than the plurality of side walls, and wherein at least a lower-most point of the second portion is lower than at least one point of the first portion.

Abstract: The present application provides an adapter (20) for a manifold gauge assembly (1) for use on a fluid system, for example an HVAC-R system. The manifold gauge assembly (1) comprises a manifold (3) for connection to the fluid system, and a pressure gauge (14) arranged to detect a fluid pressure in the manifold (3). The adapter (20) comprises a tube (23) having connectors (27, 28) for fluidly connecting the adapter (20) to the pressure gauge (14) and to the manifold (3). The adapter also includes an electronic pressure sensor (21) arranged to detect a fluid pressure in the tube (23), and a communications unit (22) configured to receive data from the electronic pressure sensor (21) and to communicate with a remote device (32).

Abstract: The present application provides apparatus (15) for connection to an HVAC-R system during maintenance or commissioning. The apparatus includes a plurality of ports (16, 17, 18) for fluid connection to the HVAC-R system and to maintenance apparatus, for example a refrigerant tank, a refrigerant recovery unit and/or a vacuum pump. The apparatus also includes a plurality of fluid connections (20) between the plurality of ports, each of the plurality of fluid connections having an electrically actuatable valve (21) to open and close the fluid connection. The apparatus also includes a control unit configured to control each of the electrically actuatable valves to configure the plurality of fluid connections.

Abstract: A condensate pump assembly for use in an air conditioning system, the condensate pump assembly comprising: a pump arranged in a housing to pump liquid from a liquid inlet to a liquid outlet; a liquid receptacle configured to receive liquid from the liquid inlet; and suspension means configured to suspend the pump from a bottom surface of the housing. The suspension means are configured to substantially eliminate vibrations being transmitted from the pump to the housing.