After recovering liquid refrigerant from a low-pressure chiller, what must be done next?

After recovering liquid refrigerant from a low-pressure chiller, the next necessary step is to recover the vapor refrigerant. This process is essential because liquid refrigerant may not completely fill the system, and significant amounts of refrigerant can remain in vapor form.

Recovering the vapor ensures that the system is safely emptied of refrigerant, preventing potential environmental contamination and ensuring compliance with regulations pertaining to refrigerant handling. It also minimizes the risk of refrigerant entering the atmosphere during maintenance or after a system failure.

Additionally, this step is critical for the efficiency and functionality of the chiller once repairs or maintenance are performed, as any residual refrigerant can affect the performance of the system when it is recharged with refrigerant. Properly completing the recovery process ensures that technicians can safely and effectively service the unit.