Which statement about suction line accumulators is NOT true?

Suction line accumulators play a key role in refrigeration and air conditioning systems by serving as a reservoir for liquid refrigerant, ensuring that the suction line is properly filled and preventing compressor damage due to liquid slugging. The primary function of these accumulators is to maintain a constant liquid level in the suction line, as they regulate the flow of refrigerant to the compressor.

The statement that they are intended to maintain a constant liquid level and do not need to be emptied is accurate because these accumulators are designed to continuously provide liquid refrigerant to the system rather than requiring routine emptying. Instead of needing to be emptied, they work to balance the system's needs, adjusting the amount of refrigerant in the suction line automatically.

In contrast, the other statements present methods by which accumulators can theoretically be emptied, though in practical operation, they are not typically required to be emptied on a regular basis. This helps clarify why the fourth statement stands out as not true in the context of the intended design and functionality of suction line accumulators.