Minor repairs may be performed on low pressure refrigerant systems without recovering the refrigerant charge if the pressure in the system is raised to atmospheric. How may this be accomplished?

Correct Answer: Option D — heat the refrigerant

Under EPA and marine refrigeration service practices, minor repairs on low-pressure systems can avoid full refrigerant recovery if internal pressure is raised to atmospheric. Heating the remaining liquid refrigerant using an approved blanket or warm water increases saturation pressure up to 0 psig safely.