checking oil through freon sample how?

[hvacdoctor]

Need to check percentage of oil in freon liquid sample on mcquay chiller. Do you use a recovery or other type of container to pull the sample? Any insight on the best way would be helpful.

[ga1279]

Since this is considered lab work I don't believe it would constitute venting (IMHO) If this is venting, especially if you are talking about R-123, then you have to pull a refrigerant sample out of the evaporator liquid and send it off to a lab to be analyzed for per centage of oil in the refrigerant. A goetz bottle is a graduated lab beaker that you put your liquid refrigerant in and allow the liquid to boil off leaving the oil after all the refrigerant is gone. From that you can determine the amount oil contaminating the charge. Since the regulations (EPA) I have used the lab method only and I may be showing my age by still remembering the Goetz bottle test we used to do during annuals.-GEO

[tech93]

Need to check percentage of oil in freon liquid sample on mcquay chiller. Do you use a recovery or other type of container to pull the sample? Any insight on the best way would be helpful.

Trane supply houses have free oil sample bottles and then like 35 bucks to send it to lab to get checked.can usually get sample from oil filter most times still has some liquid ref still in it what kind of ref in chiller.

[Chris_Worthington]

Be sure to screw the lid on REALLY tight immediately after taking the sample !!!

Okay, maybe not :angel:

[doubleduece]

You can get a refigerant sample bottle from your local supply house(they dont stock it). I have taken samples in the past to have ananylzed for moisture and oil. The bottle is steel and holds about one pound if liquid.

Good luck!!!!

[york56]

Be sure to screw the lid on REALLY tight immediately after taking the sample !!!

Okay, maybe not :angel:

Ok so you want to see it go pop go the weasel in his pocket now thats funny.

[ga1279]

Chris Worthington; Oil sample bottles have screw on caps and are 3 or 4 ounce plastic bottles, refrigerant sample bottles can be the type that look like hair spray cans with valves that have to be evacuated then filled. Another type is a steel canister with a brass valve and relief valve on one end and again you have to evacuate it and draw in liquid. The third type and the one I am the most familiar with is a spun aluminum vessel about an inch and one half in diameter and about a foot long with a valve and relief on one end (same sample gathering procedure). Please note none of these will fit in your pocket as they are to big. -GEO

[york56]

We use to take samples with short glass bottles for oil they were the best never broke then they decided to replace those with the plastic version and when you took the sample due to the refrigerant in the sample if you didn't vent them they would pop both would fit in a jacket pocket or small box to carry around while you did this the refrigerant sample kits were metal containers which were under a vacumm to recover your sample some guys use to bring them into the office and leave them on the secretarys desk in a box to go out and then they would explode. Then they went to a double containment container.

[hvacdoctor]

Thanks for the advice. I was thinking of using recovery tank, evacuate it, weigh it with hoses on it, fill up 1lb of liquid freon from system, bleed back the freon and re weigh the tank again??? I need to find out the percentage of oil in the freon to determine the amount of oil in system!!!!! IMO
What a messed up design and proceedure!