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Where does the purge unit take its suction?
condenser
The primary purpose of a purge unit is to remove non- condensables from the system. A centrifugal chiller’s purge condensing unit takes its suction from the top of the condenser, removes air and other non-condensables from the system, and returns refrigerant to the evaporator.
What does the purge unit on a chilled water system do?
The purge unit is a small, independent, adjunct refrigeration system that separates the non-condensables from the refrigerant and recondenses and collects any refrigerant in the exhaust vent stream. The remaining non-condensables (mostly air) are then vented.
Where is the purge unit located in a low-pressure system quizlet?
Where is the purge unit located in a low-pressure system? The top of the condenser. If a strong odor is detected during the recovery process, a compressor burn-out may have occurred.
What is the primary purpose of a purge unit on a low-pressure chiller?
Low-pressure chillers require purge units because they operate below atmospheric pressure. The primary purpose of a purge unit is to remove non-condensables that leak into a low-pressure chiller system.
What is purging in refrigeration?
The process of removing the colorless, odorless air is called purging. Accumulated air not only insulates the transfer surface, it effectively reduces the size of the condenser. To com- pensate for this size reduction, the system must work harder by increasing the pressure and temperature of the refrigerant.
Where is the purge unit located in a low pressure system quizlet?
What is the primary purpose of a purge unit?
The purpose of the purge unit is to maintain a low level of non-condensibles in the chiller condenser. A gas mixture of refrigerant, air and water vapor is drawn off from the chiller condenser and separated.
Where is purge unit in chiller?
Although purge units can be utilized on high and low pressure chiller systems, they mostly are found on R-11, R-123 and R-113 low pressure centrifugal chiller applications. The most important criteria for any high efficiency purge system is its efficiency level.
What is the function of the purge unit quizlet?
What is a high efficiency purge unit? It removes non-condensables that contain a low percentage of refrigerant. This adds to the value of the purge drum in refrigerant containment.