HVAC - EPA Certification Questions and
Answers|Latest Update
relief valves - downstream line from pressure regulator
- NOT installed in series
Schrader valves check valve cores for leaks, bends, & breakage
SCBA Self-Contained Breathing Apparatus;
used in event of large refrigerant leak
transportation DOT standards:
- upright position
- "2.2 non-flammable gas" tag
BEFORE 1993 equipment requirements - capable of removing 80% of refrigerant
- achieve 4 inch vacuum under ARI 740
- certified
,AFTER 1993 equipment requirements - EPA certified./ listed (UL, E.T.L.)
- capable of recovering 90% WITH compressor
- capable of recovering 80% WITHOUT compressor
or achieve 4 inch vacuum under ARI 740
small appliances leak repair NOT required, but should be done when possible
mixed refrigerant DO NOT mix refrigerant during recovery procedures
non-condensables with self-contained recovery system be sure to have tank inlet valve
open to release non-condensables (air)
self-contained recovery system has its own means of removing refrigerant from
appliances can reach required recovery rates with ot without operable compressor
system-dependent recovery small appliances system that captures refrigerant in non-
pressurized container (bag containers);
, uses appliance compressor, external heat source, or vacuum pump
reclaim to process a refrigerant to a level equal to new product standards as determined by
chemical analysis
non-operating compressor
(System dependent) - low and high side access may be necessary
- you must release trapped refrigerant from compressor oil (heat & tap or vacuum)
- EPA requires at least one self-contained recovery device; except SMALL appliances
- system dependent devices only used on appliances containing 15 lbs of refrigerant or less
piercing type access fitting
(process tube) sealed systems:
- leak tested and solderless on aluminum & copper
- not permanent service fixtures
refrigerators before 1950
Answers|Latest Update
relief valves - downstream line from pressure regulator
- NOT installed in series
Schrader valves check valve cores for leaks, bends, & breakage
SCBA Self-Contained Breathing Apparatus;
used in event of large refrigerant leak
transportation DOT standards:
- upright position
- "2.2 non-flammable gas" tag
BEFORE 1993 equipment requirements - capable of removing 80% of refrigerant
- achieve 4 inch vacuum under ARI 740
- certified
,AFTER 1993 equipment requirements - EPA certified./ listed (UL, E.T.L.)
- capable of recovering 90% WITH compressor
- capable of recovering 80% WITHOUT compressor
or achieve 4 inch vacuum under ARI 740
small appliances leak repair NOT required, but should be done when possible
mixed refrigerant DO NOT mix refrigerant during recovery procedures
non-condensables with self-contained recovery system be sure to have tank inlet valve
open to release non-condensables (air)
self-contained recovery system has its own means of removing refrigerant from
appliances can reach required recovery rates with ot without operable compressor
system-dependent recovery small appliances system that captures refrigerant in non-
pressurized container (bag containers);
, uses appliance compressor, external heat source, or vacuum pump
reclaim to process a refrigerant to a level equal to new product standards as determined by
chemical analysis
non-operating compressor
(System dependent) - low and high side access may be necessary
- you must release trapped refrigerant from compressor oil (heat & tap or vacuum)
- EPA requires at least one self-contained recovery device; except SMALL appliances
- system dependent devices only used on appliances containing 15 lbs of refrigerant or less
piercing type access fitting
(process tube) sealed systems:
- leak tested and solderless on aluminum & copper
- not permanent service fixtures
refrigerators before 1950
