Charging as a liquid or a gas

[hammy]

Hey folks is there any documents detailing whether to charge as a gas or a liquid

Can R59 be charged both forms

Thanks in advance

[Tony]

Charge everything as a liquid - then you can't go wrong!

[GXMPLX]

... Can R59 be charged both forms

Never heard of R59. Are you sure this is the correct name?

Tony is right though, you can always charge in liquid phase but be careful to evaporate the liquid if you are charging to the low side, unless you do it in reasonable amounts and have a suction accumulator in between.

[monkey spanners]

Hi Hammy,

R59/R417A needs to be charged as a liquid.

Have a look here

http://refrigerants.dupont.com/Suva/.../isceon59.html

Jon

[GXMPLX]

Thanks! so R59 is indeed a wrong name!

[marc5180]

High glide refrigerant blends such as HFC R407C, HCFC R409A and other zeotropic
refrigerant blends (to a lesser extent HFC R410A and HFC R507) fractionate during
transfers of the blends from one container (e.g., tank or cylinder) to another
causing the composition of the blend to change. This change in composition can
make the product off specification, change it's performance and/or make the material hazardous.

All of the R4 series need to be charged as a liquid to stop this happening.

[GXMPLX]

... or charge full containers!

[Brian_UK]

... or charge full containers!

Will only work if the entire cylinder is being used; otherwise use liquid charging as stated by others.

[Tony]

High glide refrigerant blends such as HFC R407C, HCFC R409A and other zeotropic
refrigerant blends (to a lesser extent HFC R410A and HFC R507) fractionate during
transfers of the blends from one container (e.g., tank or cylinder) to another
causing the composition of the blend to change.

Marc - R507 is an azeotrope not a zeotrope and therefore can be charged as a gas without fractionating (if thats a word)

[GXMPLX]

Marc - R507 is an azeotrope not a zeotrope and therefore can be charged as a gas without fractionating (if thats a word)

Wow it took me long to see this!

R507a is only a NEAR azeotrope like all the 500 family.

Glide is about 0.04C you COULD change composition if charging near 25C.

But I agree you normally get by this, like we always did with R502 ... or was it luck?

[pendlesteve]

The best advice is;-

If the refrigerant begins with a capital R it is ASHRAE approved.
Then if the first number after the R is a 4, 5 or 6 it's a blend and should be liquid charged.