Key Takeaways
- Essential Equipment: Refrigerant scales, manifolds, temperature/pressure probes, and recovery machines are fundamental tools for accurate charging across all system types
- Charging Methods: Choose between weight-based charging for new systems, subcooling for TXV systems, or superheat for fixed-orifice systems based on your specific application
- Safety First: When charging systems with water-cooled condensers, start with vapor charging to prevent freezing and always follow A2L refrigerant handling protocols
- Measurement Matters: Modern digital tools and smart probes reduce refrigerant loss while providing more accurate readings than traditional manifold gauges
