🔥 HVAC VACUUM PROCESS (BEFORE GAS CHARGING) 🔧
✅ Connect Double Manifold Gauge Set
🔵 Low Side → Suction Line
🔴 High Side → Discharge Line
🟡 Center Hose → Vacuum Pump
⚡ Start Vacuum Pump
➡️ Open Both Valves (High + Low)
💨 Evacuate Air & Moisture
✔️ Remove Non-Condensable Gases
✔️ Prevent System Damage
⏱️ Run for 20–30 Minutes
📉 Achieve Deep Vacuum (-29 inHg or 500 Microns)
🛑 Close Valves & Stop Pump
🔍 Hold Vacuum (Leak Test)
❄️ System Ready for Refrigerant Charging!
💡 Pro Tip:
Never skip vacuuming — Moisture = Compressor Failure ⚠️
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Master HVAC formulas in one glance 📊❄️🔥

From heat load to airflow and efficiency — these are the core calculations every HVAC technician and engineer should know. Save this post now and level up your practical knowledge! 💡

✔️ Perfect for students & site engineers
✔️ Quick revision before work
✔️ Essential for interviews

👉 Small formulas, BIG impact in real projects!

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