refrigerent liq. charging ?

[yellowirenut]

i think he is saying only feed it enough to where its able to flash to a gas before reaching the compressor

[crackertech]

I charge everything with liquid so I can keep it simple.

. Listen to the compressor it will tell you if it's getting to much liquid.

[Joe Harper]

If fractionalization were a big issue, then the smallest cylinders wouldnt be 24 or so pounds..

[itsamine]

I have seen freezers be totaly screwed up just with topping off. I had to dump the charge(you know what I mean) and start from scratch. Non-condensibles were not a factor in this. So to say it's ok top top off is wrong. I've seen it not work if you haven't how long have you been in the field and not behind a desk.

Why even screw around if it's an azerotrope just charge it as a liquid like the manufactors recommend.

[jpsmith1cm]

I have seen freezers be totaly screwed up just with topping off. I had to dump the charge(you know what I mean) and start from scratch. Non-condensibles were not a factor in this. So to say it's ok top top off is wrong. I've seen it not work if you haven't how long have you been in the field and not behind a desk.

Why even screw around if it's an azerotrope just charge it as a liquid like the manufactors recommend.

Am assuming this is directed at me.

I have 15 years of experience working on supermarket racks and other associated equipment.

I have not spent a single day behind a desk.

I'd be willing to bet that your problems were due to improper charging more than just topping off.

[crackertech]

Topping off is not a issue see it everyday.

[hvac r us 2]

I have seen freezers be totaly screwed up just with topping off. I had to dump the charge(you know what I mean) and start from scratch. Non-condensibles were not a factor in this. So to say it's ok top top off is wrong. I've seen it not work if you haven't how long have you been in the field and not behind a desk.

Why even screw around if it's an azerotrope just charge it as a liquid like the manufactors recommend.

Your avatar is stupid.

[jpsmith1cm]

Topping off is not a issue see it everyday.

I'd like to see him sell a small owner on a total rack re-charge...

Nothing like taking the Frozen food offline for a day or so, spending several thousand dollars on gas and labor just because you think it will screw things up.

[Airmechanical]

I'd be willing to bet that your problems were due to improper charging more than just topping off.

yes, probably used the wrong refrigerant and created a bad "blend"

the public and "non refrigeration" tech's should understand that;

"knowing which refrigerant" is actually in the system is "more" than half the battle when repairing refrigeration problems



.

[jpsmith1cm]

Jeez.

You keep agreeing with me and people are going to talk...

[itsamine]

Am assuming this is directed at me.

I have 15 years of experience working on supermarket racks and other associated equipment.

I have not spent a single day behind a desk.

I'd be willing to bet that your problems were due to improper charging more than just topping off.

Feeling alittle insecure? If it was aimed at you I would of quoted you. I'm not the type to beat around the bush.

I can't tell you the last time I topped anything off as a vapor.
This walk-in freezer was being topped off every month and it worked fine at the begining.

[itsamine]

yes, probably used the wrong refrigerant and created a bad "blend"

the public and "non refrigeration" tech's should understand that;

"knowing which refrigerant" is actually in the system is "more" than half the battle when repairing refrigeration problems



.

Wrong it was the right refrigerant so don't assume.

If you can read a pt chart you can figure out what refrigerant is in it. Not that hard.

Keeping hvac tech's who "think they know refrigeration" out of the refrigerantion field is more than half the battle.

[crackertech]

I can't tell you the last time I topped anything off as a vapor.
This walk-in freezer was being topped off every month and it worked fine at the begining.

I don't think any of has ever topped anything off as a vapor.

[jpsmith1cm]

I don't think any of has ever topped anything off as a vapor.

I did just last week.

I was using R134a, so it was OK, though.

[jpsmith1cm]

Feeling alittle insecure? If it was aimed at you I would of quoted you. I'm not the type to beat around the bush.

I can't tell you the last time I topped anything off as a vapor.
This walk-in freezer was being topped off every month and it worked fine at the begining.

And the ONLY thing that you did was to replace the refrigerant and that corrected the problem?

Not insecure. I'm quite secure in what I know and what I do. Since I came straight out and said that fractionation and topping up aren't issues, it was a logical assumption.

[VTP99]

What a confusing thread. The original poster simply asked ( what freon's need to be charged as liq.) Than we go off about its refrigerant not freon. Maybe the guy only uses Du Pont. Then its about topping off. The guy said charge not topping off. I know I'm guilty myself on this one.Than vapor comes into play along with (fictionalization) get that. Reminds me back in school when the teacher would whisper into the first students ear a short sentence and by the time it got through the class it was completely different. Oh 30 years in the field this year and behind a desk once a week to do my billing.

[itsamine]

And the ONLY thing that you did was to replace the refrigerant and that corrected the problem?
Not insecure. I'm quite secure in what I know and what I do. Since I came straight out and said that fractionation and topping up aren't issues, it was a logical assumption.

Yep put it in as a liquid and haven't had a problem in over 5yrs. Of course the leak was fixed.

[jpsmith1cm]

For my curiosity and others, I'm sure, what refrigerant was in the system?

[itsamine]

For my curiosity and others, I'm sure, what refrigerant was in the system?

404A

[jpsmith1cm]

http://www.arkema-inc.com/index.cfm?pag=33

Quote from the linked data sheet:

Testing shows that fractionation due to system leaks is typically not a problem for R-404A. Fix the leak and top off the charge.

Not arguing with you, but I have used literally TONS of 404a in topping off systems and have never had a problem like you have described.