charging question

[ruffus]

so can some one tell me why my high side on a A/C that i am building moves up and down buy 15 psi does this mean that i have a contaminant in it or what:shrug:

[wdrzal]

could be a non-condesable,like air........did you vacuum ???

[ruffus]

ya i vaced it down and pressure tested but after this all i found that some one hade put in the wrong screw in the wrong spot and now the condessor has a small hole i now have to fix but know big deal so ya i think it was air as well but thanks for the help

[AliG]

hey one question guys, if ruffus patches the hole up and oxidation forms, what exactly will that do? I kinda want to know this since I never managed to get to assembling my unit and now my brazed evap is covered with oxidation. Would that simply harm my performance? Or does that actually ruin the part?

[Xeon th MG Pony]

that oxidation turns your oil into sand paper and will plug up the cap tube, all ways purg inside the pipe work whilt brazing.

[[XC] gomeler]

And even then, use a proper filter/dryer but even those can get all plugged up.

[_HL4E_HalfLife_]

gomeler;2845752']And even then, use a proper filter/dryer but even those can get all plugged up.

Window AC's don't have filter driers!

[ruffus]

this is not a window a/c it was at one time but this unit that i am putting to geather is a unit for my basement one peice goes out side and one is in side but wanted to put them togeather inside so i could see that everything works i will post a pic later today

[ruffus]

here is the pics the hole i found was in the condessor so i have to take it apart so i can cut away some of the fines so i can braze this hole up from some one being dumb and putting a long screw where there should not been a screw at all

[Xeon th MG Pony]

Window AC's don't have filter driers!

thats becuase they are nitrogen purged and vaced to 200 or lower micron in the factory and then sealed.

if you cut into one you have to add a f/d.