Summary
This technical bulletin provides guidelines for the evacuation of systems utilizing A2L refrigerants, specifically focusing on the use of the TEZ8 vacuum pump. It emphasizes the importance of proper technical training before handling A2L refrigerants due to their mildly flammable nature. The bulletin outlines necessary precautions, including verifying the vacuum pump's operation, creating a temporary flammable zone, and displaying appropriate warning signs in the work area. It also specifies the need for a CO2 or dry powder fire extinguisher and a flammable gas detector for monitoring refrigerant concentrations. Adequate ventilation and proper grounding of equipment are highlighted as critical safety measures. Additionally, the document advises against mixing A2L refrigerants with air and recommends the use of a gas ballast during evacuation. The system should be purged with oxygen-free dry nitrogen after refrigerant recovery. Overall, the bulletin serves as a comprehensive guide for safely servicing A2L refrigerant systems.
