help with use of r507 r404a and r410a

[ruffus]

hey guys got a small question for u guys i would like to use one of the gases in the title in this system i am building but i don't want to change the oil which is AB oil could i just mix in some r22 or r290 to make these gases work with the AB oil. or should i just use r22 or r290 with this system since i don't want to change the oil can i get 300watts at -30c with the r22 or r290 . which i would rather use the r22 if i have to use one of the 2 (r22,r290)

[sdumper]

What is suppose to happen if you dont change out a r22 compressors AB oil with POE and charge it with r507?

I built a small model to try this out using unit a cheap r22 compressor and after letting it run for 48 hours it still was cool to the touch and the evap still maintained a constant temp so what am I missing here?
For all my cascades I use drewmesister technique for my first stage rotaries and drain the oil and replace with POE but its a royal pain to do so.

[ruffus]

ya i knowwhat u mean i have done the same thing always changed the oil. now when u put the hole in the bottom just after the accum on the suction side. did u ever get any oil out of that hole. i never got any oil from that hole just out of the discharge so i don't even do the hole in the bottom i just take it out the dischage

Originally Posted by sdumper

What is suppose to happen if you dont change out a r22 compressors AB oil with POE and charge it with r507?

I built a small model to try this out using unit a cheap r22 compressor and after letting it run for 48 hours it still was cool to the touch and the evap still maintained a constant temp so what am I missing here?
For all my cascades I use drewmesister technique for my first stage rotaries and drain the oil and replace with POE but its a royal pain to do so.

[sdumper]

Originally Posted by ruffus

ya i knowwhat u mean i have done the same thing always changed the oil. now when u put the hole in the bottom just after the accum on the suction side. did u ever get any oil out of that hole. i never got any oil from that hole just out of the discharge so i don't even do the hole in the bottom i just take it out the dischage

Nope no oil ever came out but i did add via that hole and it worked fine...

Back to my original point...I have used r507 with AB oil and havent had any issues in the test system I ran it in. Does anyone know what issues I should have seen mixing AB and r507 because I am starting to think that I have been wasting my time changing out AB for POE.

[n00b 0f l337]

You can also always just "taint" the oil with r290 or r600.

[ruffus]

ya that ia what i was thinking but was not sure if i could do this

[blinker0]

http://www.solvay-fluor.com/docroot/...xperiences.pdf

Check out this For some apples& oranges.
Oil concerns addressed in page 3 paragraph 2

[sdumper]

Originally Posted by blinker0

http://www.solvay-fluor.com/docroot/...xperiences.pdf

Oil concerns addressed in page 3 paragraph 2

All that was mentioned in regards to oil concerns is that POE is usually required and not why. I want to know why its required and what is suppose to happen if AB is used instead on POE.