Field procedures from HVACR School, AC Service Tech, and A2L practice. Not a substitute for the OEM book or a 608 card.
Charge
18 min
Weigh it. Stabilize it. Do not treat R-32 like a 410A top-off. A2L rules are the job, not a footnote.
6 steps
Recovery
14 min
Identify the gas, stay under 80% of the tank, pull the cores, weigh everything. Mixing refrigerants is how you scrap a bottle.
4 steps
Vacuum
16 min
Cores out. Gauge on the system, not the pump. Decay is the test. Hitting 500 microns with the pump still running proves almost nothing.
4 steps
Brazing
12 min
Purge first, then a whisper of flow. POE oil will strip the oxide you leave inside the pipe and park it in the TXV.
4 steps
Electrical
10 min
Prove 0 VAC, discharge it, match µF, terminals up. A weak cap cooks compressors. A screwdriver spark on A2L is the wrong habit.
4 steps
Safety
10 min
Pressure is the leak test. Vacuum is the moisture test. Do not skip nitrogen and hope the micron gauge will confess.
3 steps
Charge
12 min
Nameplate plus liquid-line feet. The charging chart is a trim, not a substitute for the scale.
3 steps
Safety
12 min
Soap what you can see. Electronic for what you cannot. UV dye is a last, documented choice — not a first spray.
3 steps
Need a 2-minute card instead? Short procedures.