Hvac line set analyzing and charging system

A system for determining line set volume, comprising:

• an input connector configured to receive a pressurized gas from an external source;
• at least one port configured to connect to a high-pressure side or a low-pressure side of the HVAC line set;
• a reference volume fluidly coupled to the HVAC high port and the HVAC low port;
• and
• a controller configured to:
• operate a measurement mode to pressurize the HVAC line set to a predetermined pressure, isolate the HVAC line set, introduce the reference volume, and calculate a volume of the HVAC line set based on a pressure drop between the HVAC line set and the reference volume.

A method for analyzing and charging an HVAC line set using a unified apparatus having at least one port, a reference volume, and a plurality of electronically controlled valves, the method comprising:

• connecting the at least one port to a high-pressure side or a low-pressure side of the HVAC line set;
• performing a purge operation by operating the plurality of electronically controlled valves to flow an inert gas through the HVAC line set at a first predetermined pressure via the at least one port during brazing operations;
• performing a volume measurement operation by:
• evacuating the reference volume to a vacuum state;
• pressurizing the HVAC line set to a second predetermined pressure through the at least one port;
• isolating the pressurized HVAC line set;
• opening a valve to fluidly connect the pressurized HVAC line set to the evacuated reference volume;
• measuring a pressure drop;
• and
• calculating a volume of the HVAC line set based on the second predetermined pressure, the pressure drop, and a known volume of the reference volume;
• performing a leak test operation by pressurizing the HVAC line set to a third predetermined pressure higher than the second predetermined pressure and monitoring for pressure decay over a specified time period;
• performing a vacuum operation by evacuating the HVAC line set through a vacuum connection and monitoring vacuum levels;
• and
• performing a charge operation by introducing refrigerant into the HVAC line set based on the calculated volume of the HVAC line set.

A method for determining line set volume using a unified apparatus having at least one port, a reference volume, and a plurality of electronically controlled valves, the method comprising:

• connecting the at least one port to a high-pressure side or a low-pressure side of the HVAC line set;
• and
• performing a volume measurement operation by:
• evacuating the reference volume to a vacuum state;
• pressurizing the HVAC line set to a predetermined pressure through the at least one port;
• isolating the pressurized HVAC line set;
• opening a valve to fluidly connect the pressurized HVAC line set to the evacuated reference volume;
• measuring a pressure drop;
• and
• calculating a volume of the HVAC line set based on the predetermined pressure, the pressure drop, and a known volume of the reference volume.