Liquid vs. vapor filling/charging?

[The Bossman]

I'm confused on why some refrigerants should be filled/charged as a liquid than a vapor. Also, what happens if you vapor fill when you should liquid fill? Is there a chart saying how different refrigerants should be charged into vapo systems?

[Cossey]

the liquid charge ones (r400 series iirc) have to liquid charged as the mixture is not zeotropic (i think its that way round) basically means there are multiple gases mixed together to make it. the make up of the gas is different to when its in liquid form, you want the make up when its in liquid form.

r404 afaik is the only common one that is liquid charged, anyway it should say on the cylinder

[Gray Mole]

Yeah, the gases separate but in liquid form the mix is 'as stated'. I'm using 402a and it's the same deal. Might be all R4xx gasses that are liquid charged, but I'm not 100% on that.

'Glide' is based on that, where you've got 2 or 3 differrent gasses making up a blend, like 402a for instance. When the gasses separate they all boil at different temps, and when you see a glide rating, that's what they're talking about. The difference in boiling temps of the gasses in a mix.

you don't want to vapor charge with a gas that's meant to be liquid charged, cos you could end up with a slighty different mix, and mess with your temps, and also make it hard to measure for superheat and all that cos you won't know the properties.

Cheers

Gray

[_HL4E_HalfLife_]

R402A,RS-24,R404 are the only ones i can think of that need to be charged in liquid form only i know theres others but thats all i really work with at work other than R22 witch don't matter.

[expansionvalve]

It's always best to charge as directed on the cylinder.. if you charge vapor when you should charge liquid you may get a seperation taking place, this changes the structure quiet allot which will alter performance. After a time the refrigerants all blend back together.

[Stewie007]

Not to mention it would mess with your operating pressure. If it were to go up, you'd have a higher condensation temperature, and that would result in hot gas, or gas bubbles in the liquid refrigerant; definately hurting your capacity/performance.