Refrigerant conversion kit and method for a refrigerant recovery unit

摘要

A method for converting a refrigerant recovery unit from use with a first refrigerant to use with a second refrigerant includes the steps of opening, with a controller, solenoids along a refrigerant path to remove residue of the first refrigerant into a holding vessel, operating a vacuum pump, as indicated by the controller, to further remove the residue of the first refrigerant from the refrigerant path, introducing, via the controller, an amount of the second refrigerant into the refrigerant path, determining, with a refrigerant identifier, a purity of the second refrigerant in the refrigerant path. A kit is also provided to convert the refrigerant recovery unit for use with the first refrigerant to the second refrigerant.

主权项

1. A method of converting a first refrigerant recovery unit using a first refrigerant to using a second refrigerant, the method comprising the steps of:
receiving a software conversion program that provides instructions to a controller to convert the first refrigerant recovery unit from using the first refrigerant to the second refrigerant; opening, with the controller, solenoids along a refrigerant path to remove residue of the first refrigerant into a holding vessel of a connected second refrigerant recovery unit; determining, with a pressure transducer, if a pressure of the remaining first refrigerant is less than 10 p.s.i. in the first refrigerant recovery unit; operating a vacuum pump of the first refrigerant recovery unit, by the controller, to further remove any remaining first refrigerant from the refrigerant path if the determined pressure of the first refrigerant is less than 10 p.s.i.; exchanging a first oil of the vacuum pump with a second oil and replacing a first filter with a second filter; after having changed the first oil and the first filter, receiving, by the controller, an indication that the first oil of the vacuum pump and the first filter have been changed; replacing a first high pressure hose, and a low pressure hose with a second high pressure hose and a second low pressure hose; after having replaced the first high pressure hose and the first low pressure hose, receiving, by the controller, an indication that the first high pressure hose and the first low pressure hose have been changed with the second high pressure hose and the second low pressure hose; introducing, via the controller, a first amount of the second refrigerant into the refrigerant path after receiving the indication that the first oil of the vacuum pump, the first high pressure hose, the low pressure hose and the first filter have been changed; and determining, with a refrigerant identifier, a purity of the second refrigerant in the refrigerant path before adding a second amount of the second refrigerant.