Patent ID: 8616011

Claim:
A refrigerant servicing device comprising: an inlet for receiving refrigerant from a system to be serviced; an oil separator configured to separate oil out of the refrigerant; a holding tank configured to hold the refrigerant; a clean refrigerant tank configured to contain clean refrigerant to add to the refrigerant to be serviced; an outlet configured to provide an outlet for serviced refrigerant to be returned to the system to be serviced; and a controller configured to: control the inlet, and the outlet; move clean refrigerant to remove the refrigerant from the system to be serviced; separate oil from the refrigerant; add clean refrigerant to the refrigerant being serviced to achieve a desired total amount of refrigerant and return the refrigerant to the system being serviced; detect when connecting hoses connecting the refrigerant servicing device to the system to be serviced are connected to the system to be serviced; forwarding an alert to disconnect the pair of hoses from the system being serviced when the hoses are connected to the system being serviced; and flush the refrigerant servicing device with clean refrigerant after the refrigerant service device has serviced refrigerant.