carrier 19xl

[jerseydevil]

Picked up new acct with carrier 19xl high pressure centrifugal.Havent obtained a manual yet.My question is customer says oil can be changed in a day by prior contractor.
Not that familiar with this one but cant see how that is possible?
I mostly serviced low pressure centrifugals or hp screws.
Not sure if u could use an oil recovery tank ? dont think it will work without losing refrig.

Any suggestions from exp and if anyone has link to manual would be appreciated.

[INTECHBILL]

One of the biggest problems with carrier is you as the contractor will always be responsible for the oil ... one time I picked up a 35 hp compressor under warranty and I had to buy 5 gal of refrigerant oil

[dandyme]

you've got mail


hope it works

[txhvac]

If you have isolation valves on the compressor & a pumpout compressor. Yes you can do the job in a day. My question is why change the oil? That is not a normal maintenance routine...problems?

[DITAW]

Oil sample should be sufficient unless there is a problem. but if you do have to change it and there are isolation valves , pump it down but leave some pressure, like 3-5 psi and blow the oil out, then pump the new oil in, with the isolation valves i can be done in one day.

[RayD8630]

Since were on this subject what do you guys test for? Moisture? Acidity? Both?

[chillerguy81]

Acid, moisture, and wear metals.

[M100 Tech]

People ask "why change the oil"? Other than oil analsys, just because the customer wants to! Yes, pump it out with the chillers oil pump then hand pump it back into the chiller! DO NOT FORGET TO TURN OFF THE OIL HEATER!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[jerseydevil]

the initial quote was for pm and oil change on 2 machines.Naturally i asked sales dept how did u quote this with no manual or asking any techs? oh we can beat other quote by bla bla bla!!!
I do have email on profile and appreciate support .Should be heading there next week and if isolation valves like people say no problem.

[Carrene #2]

the initial quote was for pm and oil change on 2 machines.Naturally i asked sales dept how did u quote this with no manual or asking any techs? oh we can beat other quote by bla bla bla!!!
I do have email on profile and appreciate support .Should be heading there next week and if isolation valves like people say no problem.

Isolation valves, good luck on 19XL. Once you're set up with proper oil and empty pails and an electric pump, it takes about an hour (never actually timed it) to change the oil. It might take a day using a hand pump (you'll only ever try that once). It takes a long time to pump 7-8 gal of oil at 2-4 oz a stroke against the 134a pressure.

Talk to someone you know who works on these machines. From the replies, some have no idea.

[M100 Tech]

And most of the 19XL's I have done are R-22. Carrier goes overboard on the oil. Take a sample. Change on what the sample says!

Save the Earth! Save a Tree, we might need the fire wood someday!

[MKnyc]

Isolation valves, good luck on 19XL. Once you're set up with proper oil and empty pails and an electric pump, it takes about an hour (never actually timed it) to change the oil. It might take a day using a hand pump (you'll only ever try that once). It takes a long time to pump 7-8 gal of oil at 2-4 oz a stroke against the 134a pressure.

Talk to someone you know who works on these machines. From the replies, some have no idea.

You can isolate only the oil pump. You can let the oil drain from the sump valve by the two glasses in the transmision section of the compressor. You won't lose that much ref. When it pisses vapor you know you're done. :) Tried using a hand pump only once. LOL. took all day but I was getting paid for it. I agree you don't need to change the oil every year. .... now if only Carrier would figure out something to fix the oil return on those machines. They don't like running anything except 100% with decent tower water temps.

[jerseydevil]

i have electric pump.Dont recall seeing isolation valves on many centifugals.Was just concerned with to much refrig coming out with oil.sounds like ill be ok.like i said customer requested oil change dont have any history on machine, what customer wants to pay for they can have.

[heavymetaldad]

You're going to have to transfer the refrigerant out of the machine as DITAW stated, unless there is a discharge iso. valve. Then you'll just store the charge in another part of the machine. If you don't, you'll have barrels full of refrigerant laden oil foam. (and that ALWAYS gets on the floor)

[jerseydevil]

You're going to have to transfer the refrigerant out of the machine as DITAW stated, unless there is a discharge iso. valve. Then you'll just store the charge in another part of the machine. If you don't, you'll have barrels full of refrigerant laden oil foam. (and that ALWAYS gets on the floor)



Thats what im talkin about.We're on the same page thanks

[referteacher]

Isolation valves, good luck on 19XL. Once you're set up with proper oil and empty pails and an electric pump, it takes about an hour (never actually timed it) to change the oil. It might take a day using a hand pump (you'll only ever try that once). It takes a long time to pump 7-8 gal of oil at 2-4 oz a stroke against the 134a pressure.

Talk to someone you know who works on these machines. From the replies, some have no idea.

It is illegal to drain oil from a refrigeration system at higher than 5 psig.!!!!!!!!

Take a look at this link from E.P.A.

http://www.epa.gov/ozone/title6/608/oil.html

[chillerfreak]

Take a clean recovery tank....I use a clean air compressor tank that has wheels on it fitted with 1/2 inch flare fittings...evacuate the tank.....hook oil drain valve up to bottom of tank....hook small recovery unit up to top of tank and discharge of recovery unit up to chiller.....open drain valve...make sure oil heater is off!....once oil has drained out of sump shut off drain valve.....continue to run recovery unit until refrigerant is out of oil....a strap on heater speeds up this process....Isolate recovery unit and pump new oil into chiller.....once oil buckets are empty pressurize recovery tank and push oil into into empty buckets.....now take coffee break!...ohhh turn sump heater back on!

[jerseydevil]

chillerfreak thanks for detailed instruction ,saw a post on here somewhere that described similar proceedure .didnt remember all details.This is route i will go,thanks all.

[Carrene #2]

Referteacher, thanks.
Interesting read.
I never believe anything I read on the internet hehehe.
Guess, after all the bad practices that are posted on this forum, I should change my oil change routine.
Thanks again.

[milkyway]

Take a clean recovery tank....I use a clean air compressor tank that has wheels on it fitted with 1/2 inch flare fittings...evacuate the tank.....hook oil drain valve up to bottom of tank....hook small recovery unit up to top of tank and discharge of recovery unit up to chiller.....open drain valve...make sure oil heater is off!....once oil has drained out of sump shut off drain valve.....continue to run recovery unit until refrigerant is out of oil....a strap on heater speeds up this process....Isolate recovery unit and pump new oil into chiller.....once oil buckets are empty pressurize recovery tank and push oil into into empty buckets.....now take coffee break!...ohhh turn sump heater back on!

i went to a class and they were talking about the same method when they were going to recover a R123 machine.,, that sounds like the push pull method