PDF Attachments at Bottom
ESCO Low GWP Refrigerant Safety Training Course
Click HERE
Practice Exams - Click HERE
AHRI Facts Sheet and Best Practices
Click HERE
A2Ls Fact Check - Myth Busting
Click HERE
Burn Comparison
Chemours Overview hosted by JCI - Here
Register for FREE with your email address
Frequently Asked Questions
Click HERE
Chemours (Opteon) Knowledge Hub
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Chemours (Opteon) Understanding A2Ls
Click HERE
More Details from HVAC School
Click HERE
Updated Requirements
|
Action |
A1's | A2L's |
| Safely remove refrigerant following local & national regs | Required | Required |
| Purge circuit with inert gas (e.g. oxygen-free nitrogen) | Best Practice | Required |
| Evacuate circuit | Best Practice | Required |
| Open circuit by cutting or brazing | Required | Required |
| Make repairs, purging with nitrogen while brazing | Required | Required |
| Leak and pressure test | Best Practice | Required |
| Evacuate the system | Required | Required |
| Charge the system | Required | Required |
A2L Tool Updates
|
Service Item (vs R-410A) |
A2L's |
| Refrigerant Recovery Cylinder | Flammable (GHS label, left-handed threads) |
| Vacuum Pump | Check w/ manufacturer (switch located away from work) |
| Recovery Machines | Move 2L compatible |
| Gas Detector | Move 2L compatible |
| Electronic Leak Detector | Move 2L compatible |
| Scales | No changes |
| Ventilation Fan | Similar (may be differences in machine rooms) |
| Electrical Hand Tools | Non-sparking preferred (AHRI - 8017) |
| Dry Chemical/CO₂ Fire Extinguisher | Chemical compatible |
P/T Comparison
| Saturation Temp @ | R-410A | R-32 | R-454B |
| 40ºF Dew Point | 118.4 psi | 121.0 psi (no glide) | 107.0 psi |
| 100ºF Bubble Point | 318.5 psi | 325.7 psi (no glide) | 300.8 psi |
Manufactures that have announced their new refrigerant choice in the USA:
In short: Technicians will need to be equipped for using both
Reverse thread adapters, 2 recovery cylinders, etc...
R-32 Residentially:
Daikin - (Daikin, Goodman, Amana)
Rheem Mini Split - (Ruud, Weatherking)
R-454B Residentially:
JCI - (York, Coleman, Evcon, Luxaire)
Carrier - (Bryant, Payne, ICP, ComfortMaker, Heil, KeepRite, Tempstar, WeatherMaker, Day & Night)
Trane - (American Standard)
Lennox - (Concord, Armstrong Air, Ducane, Aire-flo)
Nortek - (Maytag, Frigidaire)
Rheem Unitary - (Ruud, Weatherking)
Mitsubishi
Get the most up-to-date codes from AHRI
Interactive Building Code Map - HERE
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