Which appliances are classified as high-pressure appliances?

Appliances classified as high-pressure appliances are those using refrigerants with pressures between 170 psia and 355 psia. This classification is crucial because high-pressure appliances operate under specific refrigerant pressure conditions, which can impact the handling and servicing protocols required for safety and compliance with regulations such as those outlined in the EPA 608 standards.

In the context of refrigerant management and technician safety, recognizing the pressure classification is key. High-pressure appliances, because of their operating pressures, require technicians to follow stringent procedures to prevent accidents and ensure effective recovery and recycling of refrigerants. This includes using appropriate recovery equipment and understanding the physical properties of the refrigerants that fall within this pressure range.

Other classifications, such as those using refrigerants with pressures below 170 psia, would fall under low-pressure appliances, thus differing in their handling requirements. Similarly, appliances that do not use refrigerants or all types of refrigerators regardless of pressure do not fit the definition of high-pressure appliances, as they either describe a different operational category or do not involve the relevant operating pressures at all.