Where should pressure limiting devices of refrigeration systems be connected?

In refrigeration systems, pressure limiting devices play a crucial role in ensuring the safe operation of the system by preventing excessive pressure buildup, which could lead to failures or hazards. The correct connection point for these devices is to a blowdown tank.

Connecting pressure limiting devices to a blowdown tank ensures that excess pressure is safely released into a controlled environment, reducing the risk of pressure surges. This connection is vital because it protects the system components, such as compressors and condensers, from overpressure, which can lead to mechanical failure or even catastrophic accidents.

The blowdown tank is specifically designed to handle any refrigerant that might escape due to an overpressure condition, allowing it to be safely vented or handled. This connection effectively enhances the safety and reliability of the refrigeration system.

In contrast, connecting these devices to other points, such as the condenser inlet, compressor discharge side, or receiver outlet, may not provide the necessary safety measures to control and safely vent refrigerant pressure increases. Hence, the blowdown tank serves as the most effective point for pressure limiting devices in refrigeration applications.