Ozone Depletion & Climate
Not publishedof exam
Montreal ProtocolODP vs GWPStratospheric OzoneUV-B Radiation
Clean Air Act Section 609 Rules
Not publishedof exam
Venting BanRecordkeepingSales RestrictionCivil Penalties
Refrigerant Types & Properties
Not publishedof exam
R-12R-134aR-1234yfLabel Colors
Recovery, Recycling, Reclamation
Not publishedof exam
Recover vs RecycleReclaimCylinder Fill LimitSAE Standards
MVAC Servicing Equipment
Not publishedof exam
Refrigerant IdentifierUnique FittingsLeak DetectionEvacuation
Safety Procedures
Not publishedof exam
PPEA2L FlammabilityFrostbite RiskSDS Review
Quick Facts
- Exam
- EPA 609
- Owner
- U.S. EPA (CAA Section 609)
- Format
- Open-book, multiple-choice
- Questions
- 50 (ESCO) or 25 (MACS)
- Pass score
- 84%
- Time limit
- None
- Validity
- Lifetime, never expires
- Prerequisite
- None (training required first)
GWP Ladder
R-1234yf lowest, R-134a middle, CFC-12 highest impact
R-1234yf: GWP 4R-134a: GWP 1,430CFC-12: ODP 1.0
Ozone & Climate Basics
- ODP
- Ozone depletion potential
- GWP
- Global warming potential
- CFC-12 ODP
- 1.0, the reference value
- HFC-134a ODP
- Zero
- R-1234yf GWP
- 4 (EPA SNAP value)
- R-134a GWP
- 1,430
- Montreal Protocol
- 1987 CFC phaseout treaty
- UV-B radiation
- Blocked by ozone layer
Ozone Science & Policy
- Chlorine atom
- Destroys thousands of ozone
- Stratosphere
- Ozone layer's location
- CAA Title VI
- Implements Montreal Protocol
- AIM Act
- 2020 HFC phasedown law
- MY2025 rule
- Limits new high-GWP HFC-134a
Venting Rule Reminder
Never vent on purpose; accidents only are de minimis
Intentional venting is a violationAccidental hose loss is fineNever vent recovered gas
Section 608 vs 609
Section 608
- Stationary refrigeration systems
- HVAC/R technicians
- Separate certification
Section 609
- Motor vehicle AC only
- MVAC technicians
- This exam's focus
Stationary vs mobile systems
Is a Release a Violation
- Loss connecting or disconnecting hoses→De minimis, allowed(Good-faith attempt only)
- Any intentional refrigerant release→Violation(Any refrigerant class)
- Recovered gas released later→Violation(No exception applies)
- CO2 (R-744) vented→Allowed under Section 608(Still needs 609 cert)
- Paid service, no cert→Violation(Up to $25,000 per day)
Section 609 Core Rules
- Section 609
- CAA MVAC technician rule
- Certification trigger
- Servicing MVAC for payment
- Applies to
- Every refrigerant type used
- Venting ban
- No intentional refrigerant release
- De minimis
- Good-faith hose-loss allowed
- CFC-12 sales
- Certified techs, under 20 lb
- Records retention
- 3 years minimum
De Minimis vs Violation
De minimis
- Accidental hose-connect loss
- Good-faith recovery attempt
- Allowed by EPA
Violation
- Intentional venting
- Recovered gas released later
- Civil fines apply
Accidental vs intentional release
Recordkeeping & Penalties
- Shop records
- Tech certs plus reclaim destination
- New shop step
- Certify equipment to EPA region
- Current max penalty
- Up to $25,000 per day
- 2016 historic max
- $44,539 per day figure
- Violation type
- Civil, per-day, per-violation
- Enforcer
- EPA Regional Office
Label Color Recall
White is old, blue is common, yf has none
R-12: whiteR-134a: sky blueR-1234yf: SAE J639 only
R-134a vs R-1234yf
R-134a
- GWP of 1,430
- A1, nonflammable
- Sky blue label
R-1234yf
- GWP of 4
- A2L, mildly flammable
- No mandated label color
High GWP vs low GWP
Identify Refrigerant By Vehicle
- Vehicle made before 1994→Likely R-12(White label)
- Vehicle made 1994 to 2016→Likely R-134a(Sky blue label)
- Vehicle model year 2025+→R-1234yf required(Low-GWP mandate)
- Label missing or unclear→Run refrigerant identifier(SAE J1771 device)
- Identifier shows a mix→Treat as contaminated(Recover only, don't recycle)
Refrigerant Identity
- R-12
- CFC-12, pre-1994 vehicles
- R-134a
- HFC-134a, most 1994-2020s vehicles
- R-1234yf
- HFO, mandated MY2025+ vehicles
- R-744
- CO2, rare US natural refrigerant
- Blends
- Must be SNAP-approved
- Non-SNAP substitute
- Illegal to use ever
CFC-12 vs HFC-134a
CFC-12
- ODP equals 1.0
- Depletes the ozone
- White label
HFC-134a
- ODP equals zero
- High GWP instead
- Sky blue label
Ozone harm vs climate harm
Label Colors & Fittings
- R-12 label
- White
- R-134a label
- Sky blue
- R-1234yf label
- No color; follows SAE J639
- R-134a fitting
- Quick-connect, size-coded couplers
- R-1234yf high side
- 17mm OD coupler
- R-1234yf low side
- 14mm OD coupler
- Adapters
- Never allowed between refrigerants
Flammability Classification
- R-12 class
- A1, nonflammable
- R-134a class
- A1, nonflammable
- R-1234yf class
- A2L, mildly flammable
- A2L meaning
- Low toxicity, low flammability
The Three Rs
Recover, then recycle, then reclaim for resale
Recover: remove refrigerantRecycle: on-site cleanupReclaim: certified resale purity
Recovery vs Recycling
Recovery
- Removes refrigerant from system
- No purity requirement
- Always the first step
Recycling
- Cleans refrigerant on-site
- Same-owner reuse only
- Reduces moisture and contaminants
Remove first, then clean
Recover, Recycle, or Reclaim
- Removing refrigerant from system→Recover first(Always the first step)
- Reusing in same vehicle→Recycle on-site(No purity standard needed)
- Selling to another owner→Reclaim required(AHRI 700 purity needed)
- Refrigerant is contaminated→Recover-only unit(Don't recycle it)
- R-1234yf below 98% purity→Send to reclaimer(Cannot recycle on-site)
Recover, Recycle, Reclaim
- Recovery
- Remove refrigerant, no purity spec
- Recycling
- On-site cleanup, same-owner reuse
- Reclamation
- AHRI 700 purity, resale-ready
- Reclaimer
- EPA-certified facility only
- Contaminated refrigerant
- Recover it, don't recycle
- Identifier check
- Run before recovery, always
Recycling vs Reclamation
Recycling
- Stays on-site only
- No purity standard
- Same vehicle or owner
Reclamation
- Meets AHRI 700 purity
- Certified facility required
- Allows resale to others
On-site vs certified resale
Cylinders & Equipment Standards
- Max cylinder fill
- 80% by weight
- Fill guideline
- AHRI Guideline K
- R-134a equipment std
- SAE J2788
- R-1234yf equipment std
- SAE J2843
- Dual-refrigerant machine std
- SAE J3030
- Recovery efficiency target
- 95%, per SAE J2843
- R-1234yf reclaim purity
- 98% minimum required
Servicing Equipment
- Refrigerant identifier
- Confirms type before recovery
- Manifold gauge set
- Refrigerant-specific fittings only
- Vacuum pump
- Removes air and moisture
- Micron gauge
- Measures evacuation depth
- UV dye
- Visible leak trace
- Electronic sniffer
- Detects refrigerant leaks
- Topping off leak
- Repair required first
Service Sequence Steps
- Step 1
- Identify the refrigerant
- Step 2
- Recover the refrigerant
- Step 3
- Repair leak or component
- Step 4
- Evacuate the system
- Step 5
- Charge to specification
- Step 6
- Leak-check after recharge
Safety Response By Hazard
- Liquid refrigerant touches skin→Flush and treat frostbite(Not a burn)
- R-1234yf near open flame→Remove ignition source(A2L flammability risk)
- Working in enclosed space→Ventilate before starting(Asphyxiation risk)
- Unknown chemical exposure occurs→Consult the SDS(Before further handling)
PPE & Hazards
- Eye protection
- Goggles for splash risk
- Gloves
- Prevent refrigerant frostbite burns
- Liquid contact
- Causes frostbite, not heat burn
- Confined space
- Oxygen displacement risk
- R-1234yf hazard
- Mild flammability near heat
- SDS
- Review before handling refrigerant
- Mixing refrigerants
- Never mix; fire or pressure hazard
Common Traps
Recovery ≠ Recycling
Recovery just removes the gas ≠ Recycling cleans it for reuse
Recycling ≠ Reclamation
Recycling stays on-site only ≠ Reclamation meets resale purity standards
Section 608 ≠ Section 609
608 is stationary HVAC/R ≠ 609 is vehicle AC only
GWP ≠ ODP
GWP measures global warming ≠ ODP measures ozone depletion
De minimis ≠ intentional venting
De minimis is accidental loss ≠ Intentional venting is always illegal
Lifetime cert ≠ needs renewal
609 credential never expires ≠ No periodic renewal required
Topping off ≠ compliant repair
Topping off ignores the leak ≠ Leak must be repaired first
Last Minute
- 1.Pass score is 84 percent
- 2.50 questions (ESCO) or 25 (MACS)
- 3.Open-book exam, no time limit
- 4.Certification never expires, ever
- 5.609 covers MVAC, not stationary HVAC
- 6.Always recover before recycling or reclaiming
- 7.Recycling stays on-site only
- 8.Reclamation needs AHRI 700 purity
- 9.R-1234yf is A2L, mildly flammable
- 10.Never vent refrigerant on purpose
- 11.De minimis is accidental only
- 12.Fittings differ by refrigerant type
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