PDA

View Full Version : Leak on the low side :(


JSU
07-30-2004, 12:06 PM
I was wondering how you find a leak on the low side seing as soap and water wouldnt do much.... Thank!

Epsilon
07-30-2004, 02:27 PM
i would say,

pressurise it with some gas (nitrogen, propane if you do not have anything else)

When the system is off, the pressure is enough to blow boubles i recon.

JSU
07-30-2004, 02:56 PM
I tried that :(

HawainPanda
07-30-2004, 07:47 PM
u could put ur entire unit underwater...

Kazoo
07-30-2004, 07:51 PM
Pressurize with Nitrogen to 250psi and make a solution of 10-1 water to dish soap. Use a large swab to coat all the joints. The smaller the leak, the larger the bubbles. A large leak will foam. You may have to sit and watch each joint for 10 minutes or so.

kayl
07-31-2004, 05:55 AM
id say its on your flex hose connections
guessing. tighen them again and see if that helps

Redwolf
07-31-2004, 07:57 AM
Do any one you use any sealant compound on your mechanical fittings? Oil works well... but not at low temperatures.

I've been using "Nylog" for years. Its a liquid nylon mixture. Looks like snot and is gooie but stays gooie. So it won't harden up like some other sealants do. Its also safe to get into the system.
http://www.refrig.com/nylogmanual1.html

(Note) on a flare its the copper and brass seat that make the seal not the threads.

PC Ice.. You should build those braise joints up around multi piping like that. This will solve your micro leak issues. Basically go over them twice. Once to get alloy into the outer pipe.. then again to get alloy around the inner and outer pipes.

Unknown_road
07-31-2004, 09:41 AM
where I work we have cannisters (like those of deodorant or spray paint) that spray sort of smoke/fog. They are used to find gas leaks in hydraulik systems. But the discription states that it can also be used for freon. Maybe you can find something simmilair.

I'm afraid I only know a dutch supplier.

JSU
07-31-2004, 09:12 PM
I guess I have to take off my insualtion on the flex hose :(

JSU
07-31-2004, 10:30 PM
Thanks alot kayle :thumbsup: I found a leak in one of my flare fittings.... I also make a kink in the copper suction line but I made it into a square instead of it being flat. I hope this is the last leak......