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Originally Posted by hydra

I've found it necessary to break vacuum w/nitro up to 5 times to get down to 300-500 mics on some small reach in units. Probably due to the restrictive nature of the smaller diameter tubing. Something to keep in mind on the next one. Glad it's working though!

Thanks for the info, if i need to, I will remember this entire discussion, be it technical or personable related...

I've found it necessary to break vacuum w/nitro up to 5 times to get down to 300-500 mics on some small reach in units. Probably due to the restrictive nature of the smaller diameter tubing. Something to keep in mind on the next one. Glad it's working though!

Originally Posted by SBres22

just an update....
No call backs still. I may have been wrong, I may have been right.The guy I was working with has since informed me that he may have had a hair across his a$$ that week and apologized for not explaining himself, he didnt explain himself then either though. lol. but, we hashed out our differences and he understood why I got aggravated and told me he'd start taking a second to explain why and why not he is doing certain things... We are now merrily skipping down the street holding hands!! LOL Thanks all for the input.

Guy you work with may, for any number of reasons, not have the social or communicative skills to explain things well... just life. The unfortunate thing is: Those of us who do more or less have the social/communicative skills... spend a lot of our time cleaning up the messes of others that either do not have the skills or behave like jerks. Again, just life. Glad you are getting along better.

just an update....
No call backs still. I may have been wrong, I may have been right.The guy I was working with has since informed me that he may have had a hair across his a$$ that week and apologized for not explaining himself, he didnt explain himself then either though. lol. but, we hashed out our differences and he understood why I got aggravated and told me he'd start taking a second to explain why and why not he is doing certain things... We are now merrily skipping down the street holding hands!! LOL Thanks all for the input.

Originally Posted by jpsmith1cm

Not only is their refrigerant in the oil, but, even at 0 PSIG, there is still refrigerant in the lineset.

I know. We were talking about heel contents on green jugs a while back remember?

0psig is the same as bag full of refrigerant at same pressure as atmosphere.

Systems are usually brought down to 15" Hg vacuum (about 1/2 atm or 380,000 microns) with a recovery machine, then pulled down by rotary vane vacuum pump but by the time you're down to ~1,000 microns(1mmHg) is there detectable amount of refrigerant in vacuum exhaust from oil off-gas?

Originally Posted by ICanHas

If there's refrigerant in oil, can't you set off the electronic leak detector at vacuum pump exhaust?

Not only is their refrigerant in the oil, but, even at 0 PSIG, there is still refrigerant in the lineset.

I can't count the times that I've set off a building leak detector with a vacuum pump after a repair.

Originally Posted by ICanHas

If there's refrigerant in oil, can't you set off the electronic leak detector at vacuum pump exhaust?

Interesting thought, why didn't I think of that? I'm gonna try that next time I vacuum just for giggles.

If there's refrigerant in oil, can't you set off the electronic leak detector at vacuum pump exhaust?

Now that i've thought about it, i dont believe it was a leak, i believe it was just air in system... the unit wasnt cooling properly, running constantly, then going off on HP. The store owner had another company come in and they diagnosed a leak and repaired it prior to our arrival. i think when they charged it, they forgot to purge their hoses. like i said before, i wasnt positive it was a leak. I just wanted to go through the proper steps. we havent gotten a call back yet, but that doesnt mean anything. the owner is the type that has VERY LITTLE patience with it not working and will call different companies every day! which makes stuff harder.It may be runnning just fine right now. I havent been back. And btw it was a TRUE reach in freezer.(I believe)

Most of time people who is insecure or belittle others is too make themself looks good.
They don't want to look bad cause they don't know what they are doing.

Whats exactly are you working on?
Walk in? Reach in?
Why do you think there's a leak?
What happened to freezer
Why did he feel the reason for this unit to go down was due to moisture ?

We can talk about proper evac all day
But if that's not what cause this unit Togo down then it will be down again.

Alot of times you can hear the reefer boiling out of the compressor oil. A piece of garden hose or even a screwdriver placed on the compressor and then to your ear will allow you to hear it. I warm the compressor and it usually speeds things up considerably.

Hey SBres22, I know that guy your are referring. I worked with him. I quit my job because I didn't want to deal with his non-sense. Have confidence, do what is right. Fix it right using fundamentally correct methods.
In regards to losing some vacuum, for a 300 mi lost, did it continue to rise above 1550? From what I read, it jumped from 1200 to 1500 and hung tight? I;d be concerned the condition of my equipment, manifold, hoses, etc. I quit using my refrigerant manifold for vacuum work, went to a single hose and a vacuum stub style gauge. I also add a very small dab of vacuum grease on all of the schreader valve seals.

Not to over simplify the matter, change your vac oil and check your hoses. Too much moisture in the oil, or a slightly leaky hose could be the problem.

I agree with what the guys said before. In my opinion you always want to bring your system down to 500 microns..blank it off and let it sit. So many guys I know in this trade pull it to 500 and say *its good I got it down there* If you were to try and make It hold that it wont. If your really worried about it do a triple evacuation breaking with nitro then pump. Sounds to me like you have moisture in the system.

Originally Posted by Tommy knocker

I agree with BS call. He is wrong you are rite. That doesn't nessisarily mean there is a leak or the system is contaminated or that it will not work fine. It means his procedures suck and you should not follow his example. Which you did not so good for you.

Thats what I am getting at here! thank you for seeing it that way. I'm NOT saying I know what the problem is, I was saying "LETS FIGURE THIS EFFER OUT" All I was trying to do was BE POSITIVE one way or the other with what was wrong... No callback yet. For anybody keeping track. lol

From the sounds of it, I have my doubts that their first diagnosis was correct to start with. A good "tech" would have been able to prove non-condensibles and not stab at.

The latter points are good points. I'd be a big upset too if the boss sent in the bail out crew when I was having problems with something then they proceeded to argue with me. Time will tell. Poor refrigeration practices will show up in the long run.

Oops, I hit reply by mistake on my phone. How do you delete a post on tapatalk? LoL


Sent from my iPhone using Tapatalk

Originally Posted by ga-hvac-tech

OK, now this is the part you may not like... however it is offered in the same spirit as before:

Now 'get back to work'... LOL

btw, I said I ALWAYS appreciate constructive criticism. ALWAYS. You sir, have tact. other people may be better techs than you, but I'd rather have you on my team than some of them for that reason alone.

I agree with BS call. He is wrong you are rite. That doesn't nessisarily mean there is a leak or the system is contaminated or that it will not work fine. It means his procedures suck and you should not follow his example. Which you did not so good for you.

^no problems with the above post AT ALL. The way I was describing this on here I now look at and see I may not have been as clear, I believe the guy CAN get the job done most of the time. I have gotten into very few arguments with people in my life due to the fact that I listen well and I dont sweat the petty $h!t, I pet the sweaty stuff. lol. I was not speaking to him like I was explaining it on this board, I was asking him if he tried doing certain things and he was belittling me. I understand people have issues at home that may make them grumpy at times, but I always try to leave my issues at home when possible. I listened to my mom when she said "If you have nothing nice to say, then dont say nothing. I just don't wanna be shadowing a guy that doesnt explain why they are skipping the proper steps ESPECIALLY when they encounter problems that they cant figure out. I am COMPLETELY fine with him skipping certain things, but if they have me shadow you, EXPLAIN a little... I may not be coming across the right way via text on here, TRUST ME, I am not a hot headed guy. I wanna LEARN, not just be shown without explanation... If I am coming across wrong at all I completely apologize, I had a bit of a rough day getting yelled at for reasons that were beyond my control. I know people can fix things even though they have no personable skills...

Thank you for your input 100%!!