a vacum pump should be connected
as far away from the pump as possible
a high capacity vacuum pump and short, large diameter hoses
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dramatically reduce emissions, pressure drop, and evacuation/dehydration time
ozone contains three
oxygen atoms
one chlorine atom can destroy
100,000 ozone molecules
CFC's do not dissolve in water and do not breakdown into other compounds that dissolve in water
CFC's cannot be washed out of the lower atmosphere
ODP
ozone depletion potential
azeotrope
where the mixture behaves like a single chemical (new refrigerant)
HFC's will not damage the ozone in the stratosphere
...
in 1992 the united states ordered the stoppage of all CFC production and importation after
December 31, 1995
according to the clean air act, no person installing, maintaining, repairing, or disposing of any appliance may knowingly vent or otherwise release into the environment and class 1 or class 2 substance after
July 1, 1992
class 1
CFC
class 2
HCFC
it became illegal to vent substitutes for CFC and HCFC refridgerants on
November 15, 1995
any device which contains and uses a class 1 or class 2 substance as a refridgerant and is used for household or commercial purpose.
appliance
self contained recovery equipment type
Active
system dependent recovery equipment type
Passive
only section 609 certified technicians may buy CFC-12 in containers smaller than 20 pounds
...
who must ensure that all refridgerant has been recovered prior to disposal of any appliance
The final person in the disposal chain (scrap metal recycler, landfill owner, ect.)
the removal of refridgerant in any condition
Recovery
to clean refridgerant by oil seperation, non-condensable removal and single or multiple passes through replaceable filter-driers to reduce moisture, acidity and particulate matter
Recycling
a complicated distillation process that returns recovered refridgerant to the purity of factory fresh refridgerant.
Reclaiming (ARI Standard 700)
under no circumstance should different refridgerants be
mixed together
Currently there is NOT a drop-in for CFC-12
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oils that are hygroscopic
Ester based (polyolesters)
the alkylbenzene, use for some ternary blends
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