Unloaders are primarily used to achieve which of the following?

Unloaders are devices utilized in refrigeration and air conditioning systems to manage the capacity of compressors. Their primary function is to reduce the capacity of the compressor when the cooling demand is low. By unloading or bypassing part of the compressor's capacity, they allow the system to operate more efficiently under varying load conditions. This adjustment not only helps in maintaining the desired temperature but also aids in energy conservation by preventing the compressor from running at full capacity when it is not needed.

Reducing capacity through unloaders ensures that the system does not overcool the space, while still maintaining sufficient pressure and flow of refrigerant. This adaptability is essential in optimizing performance and longevity of the compressor and the overall system.