From where can oil be drained in an ammonia system?

In an ammonia system, oil can be drained from the high-pressure receiver because this component collects oil that has separated from the refrigerant. The high-pressure receiver is designed to handle both refrigerant and lubricating oil that circulates within the system. When the refrigerant condenses and the pressure increases, the oil can settle in the receiver, and it can be removed from this location when performing maintenance or system checks.

This option reflects the functionality and design of the ammonia refrigeration system, emphasizing the importance of managing oil within the system for efficient operation and to prevent issues related to oil flooding or inadequate lubrication. Understanding the specific locations within the system where oil can be drained helps in proper maintenance and system management.