View Full Version : line set swap out
07-23-2006, 12:46 AM
hey guys had a question on swaping out a line set..my b-friends father-in-law got a new condenser (duncan 2-2.5 ton) but his cousin didnt do a good job putting in the lineset..its awful kinks,no clamps holding it, dangling in the air, the brazing is awful, no armaflex...i know im not the best but i can do wwwwwwwwwaaaaaaaayyyyyyyyyy better,although i only have couple months experience i had a good teacher....anyways, i know what to do, but its lack of tools, the guy said he will talk to his cousin to see if i can borrow some of his tools(torch,e.tc)and if he can pump down the unit... i can get the supplies because i work 4 a supplier,so no prob there..the only prob is pump down and charging freon... how can i go about doing this? i want to do this job, i know its easy.. oh what is the standard size of lineset for a 2-2.5 ton unit(DUNCAN).. thanks for any advice
07-23-2006, 12:53 AM
07-23-2006, 01:00 AM
First of all....working in a supply house does not make you able to do wwwaaaaaayyy better than ANYONE.
Second....You say you know what to do,so why are you asking?
Thirdly...If you knew your job,you'd already have all the info you need right in front of you.
Can anyone see a TROLL here?
07-23-2006, 01:15 AM
I APOLOGIZE, MY PROBLEM IS PUTTING THE UNIT IN PUMP DOWN, ALTHOUGH I WENT TO SCHOOL FOR HVAC THEY DID NOT TEACH ME JACK...ITS BEEN A LONG TIME SINCE IVE DONE PUMP DOWN...LOL U SHOULD OF SEEN THE HACK JOB THIS GUY DID AND HE STILL IN THE FIELD...ALL I WANTED TO KNOW OFHOW I SHOULD GO ABOUT PUMPING DOWN THE UNIT....ONCE AGAIN I DO GOT SOME FIELD WORK, BUT ITS BEEN HARD TO FIND ANOTHER HELPER POSITION,IN RESULT I WENT TO WORK 4 A SUPPLIER
07-23-2006, 01:29 AM
I understand the position your in, and it's a tough one.
At minimum, once the system is all together you'll need to pressure check it (you are going to purge with N2 while you braze right?). The a pump, micron gauge. Hope you're EPA certified when you touch this stuff too, especially on start up.
My best advice, since you're in a position where you can talk to a lot of techs, find one who wants to do the job. Even if you offer him some cash to do it on the side (I know.. I know... side jobs are bad, but everyone has done one) it's better than trying to do it yourself with out the proper tools and training.
07-23-2006, 01:34 AM
Goes to the PROS forum and we can discuss it in detail.
07-23-2006, 03:15 AM
Pump it down into the unit itself, front seat the service valves all the way, cut lines, re-do the lines. Hook em back up fill with nitrogen to pressure check it 400 psi, vacuum it down and then re open the service valves.
Let her run for a bit then make sure its A-ok.
You should have 3/8 and 5/8 coper lines
08-01-2006, 01:04 AM
when in pump down,it is counter clocke wise right,and u start with the liquid line,right?
08-01-2006, 08:02 AM
Please do not do this. Your questions are so basic that you cannot get it right. We do not know if you are EPA certified, have a vacuum pump, gages etc. Taking a torch to an even partially pressurized line can get very exciting (dangerous) in a hurry.
These questions run the track of DIY.
08-01-2006, 08:24 AM
Awsomeears, are you some kind of jackass that cant read the rules?
08-02-2006, 11:07 PM
hey hey guys chill, im not that stupid to apply flame to a pressurized line . yes i am epa certified, all i ask was for a little help to refesh my memory on some stuff, but i get it now...i understand now i have to frontseat the liq. line first but before u go in a vacume right away front seat the suction line...i know i dont have a problem with brazing in the lines and running the lines...i know i can do the job just my problem is im to cautious
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