What pressure triggers the low pressure control to turn the compressor off?

The low pressure control is designed to protect the compressor by ensuring it doesn’t operate under conditions that could lead to damage or inefficiency. The specific pressure level that triggers this control is critical for maintaining safe and effective operation.

In this context, a low pressure reading of 30 PSI is the designated threshold that will activate the low pressure control to turn the compressor off. Operating below this pressure can indicate insufficient refrigerant in the system, which can lead to compressor damage if it continues to run in this state. By turning off the compressor at 30 PSI, the system prevents potential issues such as overheating due to lack of lubrication or proper cooling action.

This setting reflects a balance between operational efficiency and equipment safety, ensuring that the compressor only runs when the pressure is sufficient to provide adequate cooling and to maintain the integrity of the refrigeration cycle. It’s essential for those involved in the supervision of fire alarm systems to understand these thresholds, as they relate to the operational parameters of related systems such as HVAC, which are often integrated into fire alarm and safety protocols in buildings.