When using recovery our recycling equipment manufactured before November 15 1993 technicians must evacuate low-pressure appliances to what level before making a major repair?

Technicians must evacuate low-pressure appliances to a vacuum level of 0 inches of Mercury (inHg) before making a major repair on recovery and recycling equipment manufactured before November 15, 1993. This ensures that any refrigerants are adequately removed from the system, minimizing the risk of release into the atmosphere during repairs. Proper evacuation is essential for compliance with environmental regulations and safe handling of refrigerants.