Where is refrigerant added back into a Type III chiller after recovery and repair?

• A. Condenser inlet
• B. Evaporator charging valve
• C. Service valve on the compressor
• D. Liquid line of the system

Answer: (B)

In a Type III chiller system, refrigerant is added back into the system through the evaporator charging valve. This is because the charging process typically requires introducing refrigerant into the low-pressure side of the system, where the refrigerant will enter the evaporator as a low-temperature vapor.

When the system is recovered and repaired, it is essential to reintroduce the refrigerant in the correct location to ensure it can properly circulate through the evaporator, absorb heat, and return to the compressor for compression.

Other options focus on locations that are not ideal for charging refrigerant back into the system. For instance, the condenser inlet and liquid line are associated with high-pressure areas, while the service valve on the compressor is typically used for maintenance purposes rather than for recharging.