moisture removal

[onetime]

I've been having a discussion in the Technical area about moisture removal from a refrigeration system that has ruptured a water cooled condenser of a freezer. In my experience to get all of the moisture out I have had to make sure all parts of the system are above 60F or the moisture will attach to the walls of the piping and not vaporize even when I get the system down to 200 microns.

Have any of you run into this type of problem?

[frostmonkey]

Your on the correct path.You need to keep the system as warm as possible while evacuating to ensure the mosture is pulled out quicker, keep a close eye on your vacum pump oil, cause you will nedd to change it several times, if the system is severly contaminated I will usually sell them a new condensing unit, instead of just replacing the condenser. Also I pull a real long vacum on the system,breaking it with nitrogen.I also insatll a high capacity liquid line drier, which I change several times,until a acidtest on the oil and refrigerantis satisfactory. Cleaning up a contaminated system takes a lot of time and perservance Good Luck :D

[onetime]

I use a cold trap to minimize the oil contamination problem, the oil last about 10 times longer.

[icehouse]

Wire a pig tail plugged in, between common and run with a 100 watt bulb in socket. This will cause trace voltage in the windings warming them up. Evacuate system to 250 microns using a 4 way manifold like Yellow Jacket Brute or similar. Install both liquid line and suction line drier (the new one for 410A picks up more).:D :D

[atozsvc]

Use The Hair Dryer To Heat Up The Evaporator While Vacuum,purge The Nitrogen,vacuum Again And After That Replace The Txv And The Drier 3 Times In Each Several Days

[icehouse]

you could also remove wire on "X" terminal of defrost clock and manually put into defrost.