A/C Oil Amounts - PeachParts Mercedes-Benz Forum

Adriel · #1 06-25-2016, 12:57 PM

Starting in on setting up the Sanden, had the realization the instructions about oil amounts may not be correct. Even the compressor was filled with more oil than states (exactly 200cc).

Going to use A/C Pro (had very good results with there mid grade product) and is 10 ounces of R134a and 2 ounces of "additive" in each can.

Having a parallel condenser, figure this also reduces the refrigerant and oil levels, so even more paranoid of slugging the compressor.

So, how does one calculate the proper refrigerant and oil levels?

Thank y'all in advance!

Edit: The additive is all liquid, including 1 to 1.5 ounces of oil. Not sure why can't be specific. Does fluid count like oil?

leathermang · #2 06-25-2016, 02:55 PM

''Having a parallel condenser, figure this also reduces the refrigerant and oil levels''

Why have you made that assumption ?

Adriel · #3 06-25-2016, 03:39 PM

Quote:

Originally Posted by leathermang

''Having a parallel condenser, figure this also reduces the refrigerant and oil levels''

Why have you made that assumption ?

Look at the difference in volume.

leathermang · #4 06-25-2016, 03:50 PM

What are those differences in volume ?
What brand Pflow are you quoting ?

Adriel · #5 06-25-2016, 04:08 PM

Quote:

Originally Posted by leathermang

What are those differences in volume ?
What brand Pflow are you quoting ?

Visual. Okay, thank you for resolving.

Okay, so next, how do we set the oil level correctly when there is 1 to 1,5 ounces of oil, seal conditioner, per 10 ounces of R134a?

leathermang · #6 06-25-2016, 04:17 PM

What is this ' seal conditioner ' you speak of ?

Adriel · #7 06-25-2016, 04:37 PM

Quote:

Originally Posted by leathermang

What is this ' seal conditioner ' you speak of ?

I am frustrated: I clearly stated it my post.

I am using 12 ounce cans of A/C Pro. In that can, it contains:
10 ounces of R134a
2 ounces of "additive"

According to the representative I spoke to on the telephone, the 2 ounces of "additive" contain seal conditioner and 1 to 1,5 ounces of PAG oil.

leathermang · #8 06-25-2016, 05:32 PM

I am not qualified to comment on Non Standard AC procedure.. I have no idea what that ' additive ' is...and do not recommend anything like that.
It is your car and you are free to use anything you want to... but putting a mystery component in it and then asking if that affects the oil amount, etc... is not logical because we on the forum do not know what is in it...

vstech · #9 06-25-2016, 06:14 PM

Agreed...

Rolguy wkuld be the guy to ask about oil volume. .. or find the mb specs on a car with that compressor in it.

If your system was flushed, i would add 1.5 oz per coil and dryer, then compressor capacity.

ROLLGUY · #10 06-25-2016, 11:27 PM

My experience with these systems has been that about 8 oz total is what it takes. The compressors usually come with about 6oz, so i usually add another 2oz of oil with dye in it to give the rest of the oil some color (leak check dye). Of course I add the oil during the charge process with the machine. Without the machine you are forced to distribute the oil among the components before closing them up and leak checking. If you are running a compressor that has oil for a different refrigerant than you are charging with, the oil needs to be drained from the compressor, and the proper type and amount added before installing the compressor (much easier to do on the bench than in the car!). Also, it is advisable to flush the remaining components before installing and hooking up the new components......Rich

Adriel · #11 06-26-2016, 12:12 AM

Quote:

Originally Posted by ROLLGUY

My experience with these systems has been that about 8 oz total is what it takes. The compressors usually come with about 6oz, so i usually add another 2oz of oil with dye in it to give the rest of the oil some color (leak check dye). Of course I add the oil during the charge process with the machine. Without the machine you are forced to distribute the oil among the components before closing them up and leak checking. If you are running a compressor that has oil for a different refrigerant than you are charging with, the oil needs to be drained from the compressor, and the proper type and amount added before installing the compressor (much easier to do on the bench than in the car!). Also, it is advisable to flush the remaining components before installing and hooking up the new components......Rich

Rich, you are amazing in how you are helping me despite.

Shows a good person.

Thank you for the help in this conversion.

Eight with a flush, huh? Okay, great having confirmation.

What about the oil in the cans?

Plan is stick with the R134a, so see no need to change the oil. And yes, easier on the dining table.

(There is cardboard on the heat mat, though still not ideal, but too warm to work outside.)