EPA 608 Type I cheat sheet

Clean Air Act Section 608 prohibits knowingly venting ozone-depleting refrigerants (CFCs, HCFCs) and their substitutes to the atmosphere during maintenance, service, repair, or disposal; Section 609 covers motor vehicle air conditioning separately.

Section 608 certification is required for technicians who maintain, service, repair, or dispose of appliances containing regulated refrigerant; certification is appliance-type specific (Type I small appliances, Type II high/very high pressure, Type III low pressure, Universal for all).

Section 608 regulatory thresholds: appliances containing 5 or more pounds of refrigerant are covered by the refrigerant management rules; small appliances are defined as charged with 5 pounds or less and are handled under Type I.

Ozone depletion potential (ODP) ranks CFC-11 and CFC-12 at 1.0; HCFC-22 is about 0.055; HFCs such as R-410A and R-134a have ODP of zero but are still regulated as substitute refrigerants under Section 608.

Global warming potential (GWP) is referenced to CO2 = 1; R-134a is about 1,430, R-410A about 2,088, and R-22 about 1,810, so recovery rather than venting reduces climate impact even for zero-ODP refrigerants.

Recovery cylinders must be DOT-approved, never filled above 80 percent of capacity by liquid volume, and must be evacuated before first use; cylinders must be marked with the refrigerant type and never mixed.

Refrigerant is a liquid at room temperature under pressure; direct contact with liquid causes frostbite, and in confined spaces heavier-than-air refrigerant displaces oxygen, so ventilation and leak detection precede work.

De minimis venting exceptions are narrow: small amounts released during good-faith recovery or while connecting/disconnecting gauges are permitted, but routine purging of hoses or blowing charge to atmosphere is a violation.

Technicians must keep records of refrigerant purchased and recovered; EPA-certified recovery equipment must meet the applicable evacuation level for the appliance type and refrigerant class being serviced.

A small appliance is a factory-sealed unit charged with 5 pounds or less of refrigerant, such as household refrigerators, freezers, window air conditioners, dehumidifiers, and packaged terminal units; motor vehicle air conditioners are excluded and fall under Section 609.

Type I recovery equipment must evacuate the appliance to 80 percent vacuum (about 4 inches Hg vacuum) for recovery of refrigerant from small appliances, or achieve the equipment manufacturer's certified level.

Because small appliances are hermetically sealed and typically lack service ports, recovery uses piercing valves or line-tap devices; the appliance must still be recovered before disposal or before opening the sealed system.

Self-contained recovery equipment certified for Type I must be used; if the appliance compressor is operational it may be used to assist recovery, but the appliance must not be energized if the compressor is inoperative or the refrigerant is contaminated.

Recovered refrigerant from small appliances may be recycled on-site with certified equipment or sent for reclamation; it may not be vented, and mixing of refrigerant types in a recovery cylinder renders the contents non-reclaimable.

Small appliances containing 5 pounds or less are exempt from the Section 608 leak repair and refrigerant management recordkeeping rules, but the venting prohibition and recovery-before-disposal requirement still apply.

Disposal: the final person in the disposal chain (e.g., landfill operator or scrap recycler) must ensure refrigerant is recovered before the appliance is shredded or crushed, and must verify recovery occurred.

Recovery cylinders used for small appliances must be DOT-approved, labeled, and filled to no more than 80 percent of capacity; a scale is used to confirm the fill level.

Recovery equipment must be certified by an EPA-approved testing organization and the technician must verify the unit is rated for the refrigerant type being recovered.

High-pressure appliances include most commercial refrigeration and residential split air conditioning systems using R-22, R-410A, R-134a, and similar refrigerants; very high-pressure appliances include those using R-410A and R-32 with higher operating pressures.

Required evacuation levels under Section 608 for high-pressure appliances: 0 inches Hg vacuum for systems with 5-50 pounds of refrigerant when using recovery equipment manufactured after November 15, 1993; 10 inches Hg for 5-50 pounds using equipment manufactured before that date; 15 inches Hg for appliances with more than 50 pounds.

For very high-pressure appliances using R-410A, recovery equipment must be rated for the higher pressures; standard R-22 gauges and hoses are not rated and can fail, so use dedicated R-410A-rated manifolds and hoses.

Recovery of refrigerant from a high-pressure appliance must not exceed the certified equipment's capability; recovery cylinders must be rated for the refrigerant's pressure and never filled above 80 percent liquid by volume.

Leak repair requirements apply to appliances containing 50 or more pounds of refrigerant: leaks must be repaired within 30 days of discovery, or the owner must develop a retrofit or retirement plan within that period.

Leak rate thresholds for comfort cooling and commercial refrigeration appliances containing 50 or more pounds trigger repair obligations; chronic leakers may be subject to additional reporting and repair requirements.

Before opening a high-pressure system, refrigerant must be recovered to the required vacuum level; nitrogen may be used to pressurize for leak detection, but refrigerant must never be used as a leak-detection pressurizing gas.

System-dependent recovery equipment for high-pressure appliances is limited to appliances with 15 pounds or less of refrigerant and requires the appliance compressor to operate; otherwise self-contained recovery equipment must be used.

Dehydration after repair uses a vacuum pump and micron gauge; a system should be evacuated to 500 microns or lower and hold, confirming no moisture or leaks before recharging.

Low-pressure appliances operate with the low-side pressure below atmospheric, typically using refrigerants such as R-11, R-113, and R-123, common in centrifugal chillers.

Because the system operates below atmospheric pressure, air and moisture can enter through leaks; non-condensables must be purged from the chiller using a purge unit, and the purge exhaust must not be vented to atmosphere without recovery.

Required evacuation levels for low-pressure appliances: 25 inches Hg vacuum for appliances using recovery equipment manufactured after November 15, 1993, and 20 inches Hg for equipment manufactured before that date.

Recovery from low-pressure systems requires a liquid pump or a recovery unit designed for low-pressure refrigerant; the chiller's own compressor may be used to assist recovery only under the equipment manufacturer's procedure.

R-11 and R-123 have high ODP or are HCFCs; R-123 has an ODP of about 0.012 and is regulated, so recovery and leak repair rules apply, and R-11 (ODP about 1.0) is a Class I ozone-depleting substance.

Low-pressure chillers must be leak-tested and repaired when leaks exceed the applicable rate; because the system is under vacuum, a rise in pressure during a standing vacuum test indicates air or moisture ingress.

Water in a low-pressure chiller forms corrosive acids with refrigerant; moisture must be removed with a dehydration filter and the system evacuated to the required micron level before charging.

Rupture discs and relief devices protect low-pressure chillers; a ruptured disc can release refrigerant, and repair requires recovery of the charge before opening the system.

Low-pressure recovery cylinders must be rated for the refrigerant and filled to no more than 80 percent of capacity; because low-pressure refrigerants boil at low temperatures, chilling the recovery cylinder speeds transfer.