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ice cuber
11-20-2005, 11:06 AM
Im new to the profession and ive heard this both ways. I work on alot of self contained cases and ive been told to charge 134a as a liquid, ive read that 134a has a constant pressure and temp so why would you charge 134a as a liquid
icemeister
11-20-2005, 11:17 AM
Being a pure refrigerants, R134a, R12 and R22 can be charged either way. The blends like R401A, R409A, R410A and all in the 400 series of refrigerants must be charges as a liquid.

The Azeotropes in the 500 series like R502 and R507 act nearly like pure refrigerants and can be charged either way as well.
ice cuber
11-20-2005, 12:15 PM
That makes sense. Thanks
rayr
11-20-2005, 03:17 PM
Now that is what I like to see. Some one who is thinking.
Dad
11-20-2005, 03:53 PM
Originally posted by rayr
Now that is what I like to see. Some one who is thinking.


and asking questions!
flangehead
11-22-2005, 04:40 PM
Being a pure refrigerants, R134a, R12 and R22 can be charged either way. The blends like R401A, R409A, R410A and all in the 400 series of refrigerants must be charges as a liquid.

The Azeotropes in the 500 series like R502 and R507 act nearly like pure refrigerants and can be charged either way as well.
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Icemeister, Why is this?
jacob perkins
11-22-2005, 04:54 PM
Originally posted by ice cuber
to charge

vapor costs more
icemeister
11-22-2005, 04:55 PM
Originally posted by flangehead
Icemeister, Why is this?

Just because. ;)

Actually it because the blends' mixture percentages cannot be maintained when dispensing as a vapor. The individual components have differing vapor pressures and as such, don't boil off to vapor at the same rate. Dispensing as a liquid keeps the mixture correct.
flangehead
11-22-2005, 09:23 PM
ok makes sense, is this what tech's mean when talking about glide?
2story
12-02-2005, 02:32 PM
Fractionization -the seperation of parts, occurs when one part of a blend boils off before the other part of a blend does. blends stick together in liquid form, in a gaseous form they fractionate.

todays secret word is fractionization, when you hear someone say it scream real loud!