Oil questions conversion 404a

[airon]

Copeland mn#LACA-0131A-TAC-800 sn#CT98102235

Putting a closed up bakery on line after a 4 year shutdown. System is at least 30 years old no condenser tag.

W/IN freezer system flat leaks found and fixed.

Now converting to 404A... was HP80.... before that was 502.

Dont have a refractometer or whatever. Any other way to determine what oil was/is in there??
Due to the clarity, cleanness of the oil I suspect AB but not sure. Using POE.

Anyone know what that comp was shipped with? will call in am to distributor.

Its been a while since I have done a conversion.
Potentially still a bunch of oil trapped in the recievers below only pulled maybe a couple quarts from comp holds like 80 oz. charge
I know 5% low mix acceptable by copeland any isssues with higher mix concentrations?

Thanks

[powell]

Copeland mn#LACA-0131A-TAC-800 sn#CT98102235

Putting a closed up bakery on line after a 4 year shutdown. System is at least 30 years old no condenser tag.

airon,

Even though the system is 30 yrs old, the compressor is a 98 yr model. The -800 at the end of the model number tells you it is a wholesaler model number replacement, not the original OEM compressor which was probably a LAC1-0300-TAC -2??. The compressor you have came with alky-benzene oil (the A in 031A) tells us that.

Here is the link to the Copeland AE bulletin which will help you with the conversion.

Section: 26
94-15 Refrigerant Changeover Guideline
http://www.hvacrinfo.com/ae_index.htm

Regards.............Powell

[airon]

Thankyou Powell

Yeah I knew it was a 98 model changeout. guess I should have know the A too but didnt register.