yes, if you go to a store here, any store, (auto) or even walmart, all there is is the R134a. (with dye, with out, with oil,l with out. etc)
no R12. and for sure no support for it, gauges and what not...
so you can't buy the fill "can" and hose with cheap plastic, low-side meter. not here. for R12.
only used tools, .
below:
this is what fits now. or (imports below) assumes it fits your fill tank, that too many need and adapter.
http://www.ebay.com/sch/i.html?_from=R40...e&_sacat=0
the purpose of Freon, was to have a refrigerant that does not burn (Propane works but is not safe, for sure in a crash)
and not toxic, the best refrigerant at the time is Ammonium gas, pure. and is very toxic to persons, directly. at this pure level.
at 300 parts per million (ppm) is immediately dangerous to life and health. and can explode, with mix of air (think crash)
It is used in commercial class systems with great effort in safety... (complex and expensive) and oddly found in RV refrigerators...
so the invented Freon, to solve all that, until they found out it eats up ozone in the upper stratosphere... so the changed the product to lessen this effect or remove it.
that is the short history of Freon. (big business here in TEXAS) huge.... (Trane and all big makers here)
my next system overhaul (home) will be R-410A (im half there now.... (at the evap core) see>?
the system uses the laws of physics called the Reverse Carnot Cycle. (moves heat in side cab to the outdoors)
https://onedirectionkateupton.wordpress....not-cycle/
or simply, it's just a heat pump. (in this case 1 way)
the system works by condensing the R12 at the condenser core. up front,
the pump compresses the freon and feeds to the condenser, it's now a liquid freon R12.
next is the :
expansion valve hidden in the cab evap core box. (its a nozzle or orifice arrangement inside)
the expansion valves change the liquid to a gas, (regulated in all cases by diffr. means)
the liquid changes from a liquid to a gas and gets real cold just like a, CO2 fire extinguisher does, deployed, same effect and physics. there.
this cools the cab air and the cycle repeats.. (loop fashion)
the key factors are the correct pressure, at the lowside and high side test points (nipples)
the system is tuned to work at its best working pressures.
if not it will be weak or the hi/low will trip off line the whole system.
it is not like simple swap cooler using water that evaporates.
The freon pressures are critical.
no R12. and for sure no support for it, gauges and what not...
so you can't buy the fill "can" and hose with cheap plastic, low-side meter. not here. for R12.
only used tools, .
below:
this is what fits now. or (imports below) assumes it fits your fill tank, that too many need and adapter.
http://www.ebay.com/sch/i.html?_from=R40...e&_sacat=0
the purpose of Freon, was to have a refrigerant that does not burn (Propane works but is not safe, for sure in a crash)
and not toxic, the best refrigerant at the time is Ammonium gas, pure. and is very toxic to persons, directly. at this pure level.
at 300 parts per million (ppm) is immediately dangerous to life and health. and can explode, with mix of air (think crash)
It is used in commercial class systems with great effort in safety... (complex and expensive) and oddly found in RV refrigerators...
so the invented Freon, to solve all that, until they found out it eats up ozone in the upper stratosphere... so the changed the product to lessen this effect or remove it.
that is the short history of Freon. (big business here in TEXAS) huge.... (Trane and all big makers here)
my next system overhaul (home) will be R-410A (im half there now.... (at the evap core) see>?
the system uses the laws of physics called the Reverse Carnot Cycle. (moves heat in side cab to the outdoors)
https://onedirectionkateupton.wordpress....not-cycle/
or simply, it's just a heat pump. (in this case 1 way)
the system works by condensing the R12 at the condenser core. up front,
the pump compresses the freon and feeds to the condenser, it's now a liquid freon R12.
next is the :
expansion valve hidden in the cab evap core box. (its a nozzle or orifice arrangement inside)
the expansion valves change the liquid to a gas, (regulated in all cases by diffr. means)
the liquid changes from a liquid to a gas and gets real cold just like a, CO2 fire extinguisher does, deployed, same effect and physics. there.
this cools the cab air and the cycle repeats.. (loop fashion)
the key factors are the correct pressure, at the lowside and high side test points (nipples)
the system is tuned to work at its best working pressures.
if not it will be weak or the hi/low will trip off line the whole system.
it is not like simple swap cooler using water that evaporates.
The freon pressures are critical.
http://www.fixkick.com