What is the high pressure cut-out setting for a recovery unit when evacuating refrigerant from a low pressure chiller?

The high pressure cut-out setting for a recovery unit is crucial for safe and efficient refrigerant recovery, especially in low pressure chillers. This setting is designed to prevent the recovery unit from operating at pressures that could lead to safety hazards or equipment damage.

The correct high pressure cut-out setting is typically around 10 psig for low pressure systems. This setting ensures that the recovery unit will stop the recovery process if the pressure exceeds 10 psig, thus protecting the system and the technician from risks associated with high pressure scenarios.

Recovery units use this cut-out setting to maintain a safe operational envelope, ensuring that the pressure does not rise too high during the recovery process. This is particularly important in low pressure chillers where system design and operating pressures can differ significantly from those of high pressure systems.

Higher settings such as 15 psig, 20 psig, or lower settings like 5 psig are not typically used for safety and operational efficiency reasons in these types of systems. They might either allow potentially unsafe operating conditions or cause unnecessary interruptions in the recovery process.