My First Cascade "Fat Boy"

[ultralo1]

4Qman,
Leave some form of acess to the suction side. Take off the schraders and use "hand valves", not ball valves.

Most anybody with refrigeration experience can get a cascade to work, No disrespect intended to anyone. The trick is to increase the longevity of the system.

the factory cascades that i repair have an average life span of 8 years +. Our rebuilds on the same units have a life expectancy of 5 + years. The temps and the equipment are unforgiving and it all comes down to the details in the process.

Your worst enemy is moisture in the system. Your best freind is vacuum and dry nitrogen. Try to achive a vacuum of less than 100 microns/millitorr. You should be able to blank off and remaine under 400 microns for 30 minutes. Get rid of the charging hoses and and use copper line from the manifold to the unit and to the vacuum pump. Charging hoses wil not let you achieve a deep vacuum because of the material they are made of, they constantly off gas.

Your kung fu looks good, Now lets make it last.

[4Qman]

My cascade running "Download a free user"
http://rapidshare.com/files/29054309...ge_running.AVI

It hasnt any mounts on the bottom of the cascade. It did sound nice when run but now a little nosiey?

I know i did a wrong move with the HX not being capped off. Wont do it again. I vacuumed it for a few ohs and blasted through with nitrogen to be sure.

Does the compressor sound nackard then chilling out?

[chillin out]

Yes, it does.

Think of a motor spinning round inside held in place with 3 springs, now remove a spring and the motor falls to one side and rattles against the casing.
Someone might have a picture for you to see.

Did you drop the comp at any time?

Chillin

[4Qman]

Did you drop the comp at any time?

No mate, was sounding sweet as a nut then i fixed it all together with the build and now it sounds a little doggy to say the least.

Its working correct as in temps and pressures. Whats the downfall regards running it if it is as you mentioned?

[chillin out]

Whats the downfall regards running it if it is as you mentioned?

Well you already know about the noise...lol

Eventually the internal pipes will rupture and render the comp useless.

Any chance of sending it back?

Chillin

[4Qman]

Well you already know about the noise...lol

Eventually the internal pipes will rupture and render the comp useless.

Any chance of sending it back?

Chillin

No mate, i got it from a air con unit that was office clearance. I got it along with the other unit that is fine.

Dam man, gutted to say the least. I don't suppose anyone has a compressor that kind of power floating about.

Just when i was ready to complete the 2nd stage this weekend.

[4Qman]

chillin out
I thought i would mention. When the compressor was fired up without any refrigerant inside it run quite and nice and smooth.

However now its very loud as you know from the video. Could this be due to the pressure in the first stage? 90PSI Static 200PSI Running IDLE?

When i claim some refrigerant back which lowers the pressure it sounds a bit better.

I am just trying to convince myself its not focked