Cvhve oil log ref??"??

[mr hottstepper]

Opened up system to change oil and clean inside oil drum after oil analysis (found dirt),replaced rear bearings , cuz of hi brg temp, started system purged , added some refrigerant(123) got system down to 50degf but it refuses to go lower .
Customer said they were losing oil before and added abt 27 gallons of oil because the oil level kept droping which was probably due to ejectors, so here r the temps n approaches.lwt51
Retchw-59
Ent con-94degf
Levcon-104
Evap-18hg
Con press-14psi
Condensin temp 116
Condensin temp in 107

[jayguy]

...Customer said they were losing oil before and added abt 27 gallons of oil ...

and the machine runs at all? get a chair, you are going to be there awhile. you will need to remove the refrigerant, distill, repair the oil eductors, evacuate and recharge with distilled refrigerant. good luck.

[mr hottstepper]

and the machine runs at all? get a chair, you are going to be there awhile. you will need to remove the refrigerant, distill, repair the oil eductors, evacuate and recharge with distilled refrigerant. good luck.

Was kinda hoping I didn't hav to bring out the drier cores, taut It could hav been something else

[mr hottstepper]

and the machine runs at all? get a chair, you are going to be there awhile. you will need to remove the refrigerant, distill, repair the oil eductors, evacuate and recharge with distilled refrigerant. good luck.

Machine is running quiet no surging , jus temps are holding @ 50 , 100% loaded

[jayguy]

Machine is running quiet no surging , jus temps are holding @ 50 , 100% loaded

you may also be low on charge...if anyone pulls the charge and weighs it, 27 gallons of oil will weigh about 222# and takes up the same volume as 325# of R123 at 90F or 341# at 40F...so distillation is more critical than most people think.

[mr hottstepper]

you may also be low on charge...if anyone pulls the charge and weighs it, 27 gallons of oil will weigh about 222# and takes up the same volume as 325# of R123 at 90F or 341# at 40F...so distillation is more critical than most people think.

So still either way I'd still hav to pull the charge ,but if it was low on charge and vanes fully open it should have surged ,and condensing press n saturation temp would have been lower? So I think I'm right back to where I feared. To go I can't afford to shut that machine down this building takes abt 5 days to recover

[jayguy]

...but if it was low on charge and vanes fully open it should have surged ,and condensing press n saturation temp would have been lower?...

not necessarily. oil inhibits heat transfer which helps keep your condensing temperature and pressure high. i have yet to see a properly running machine with the vanes at 100% and fully loaded...it is possible i suppose, but i would be very suspect if the vanes needed to be that far open at full load.

[mr hottstepper]

not necessarily. oil inhibits heat transfer which helps keep your condensing temperature and pressure high. i have yet to see a properly running machine with the vanes at 100% and fully loaded...it is possible i suppose, but i would be very suspect if the vanes needed to be that far open at full load.

Oil drum is filled way past sight glass , so I'm thinking if reduce the oil charge to a lower level not to low do you think the ejector/eductor will sip the oil that's in the evap and fill back the drum and give me a little more efficency?I'm at the job site now and this jus dawned on me what do u think?

[deltap10]

If you must keep the machine on line, drain oil to bottom of lower sight glass. Come back once a day and drain more oil until conditions improve and oil level is no longer rising. You need some vapor space in oil tank for system to work right. How did oil leave? Slow or fast. Some things to check: Eductor operation, oil tank vent line solenoid, restricted return line from suction cover,oil tank temp/heater, oil pressure, worn oil seals,refrigerant overcharge w/carryover. Why are cond temps so high? Get temps to about 85/95.

[mr hottstepper]

If you must keep the machine on line, drain oil to bottom of lower sight glass. Come back once a day and drain more oil until conditions improve and oil level is no longer rising. You need some vapor space in oil tank for system to work right. How did oil leave? Slow or fast. Some things to check: Eductor operation, oil tank vent line solenoid, restricted return line from suction cover,oil tank temp/heater, oil pressure, worn oil seals,refrigerant overcharge w/carryover. Why are cond temps so high? Get temps to about 85/95.

Dropped oil level it filld back up twice the second time the vent soloniod opened,left system running wit oil at half of sight glass oil left fast but its stedy now, water temps have dropped to 51/61 quickly and settles at that and machince amperager draw is running between 380and 400 (flucuating fast) evap press is 18hg con is 14.con is 94/101

[mr hottstepper]

If you must keep the machine on line, drain oil to bottom of lower sight glass. Come back once a day and drain more oil until conditions improve and oil level is no longer rising. You need some vapor space in oil tank for system to work right. How did oil leave? Slow or fast. Some things to check: Eductor operation, oil tank vent line solenoid, restricted return line from suction cover,oil tank temp/heater, oil pressure, worn oil seals,refrigerant overcharge w/carryover. Why are cond temps so high? Get temps to about 85/95.

Distilling ref right now is out of the question ,but I need to do somethin to get the wtr temps in d 40's

[Nuclrchiller]

I know you're worried about getting chill water temps into the 40's, but don't let that cause you to ignore everthing else. The 2 most obvious problems you appear to have are oil saturated refrigerant and high entering condenser water temps. If you must keep chiller on line, deltap10's advice is good. However it is slow. But at least you can maintain 51 degrees that way. You should quickly work to resolve the problem with the high entering condenser water temperature. That will give immediate results and improvement. That is, assuming you can quickly lower that temp to 85 F or less. Also, the condenser pressure is high for the saturated condensing temperature. Verify proper purge operation. There may be air in the chiller.

[motoguy128]

Distilling ref right now is out of the question ,but I need to do somethin to get the wtr temps in d 40's

Sounds like you're not into the 40's because your simply short on capacity since your effciency is crap... meaning you've hit RLA, but just are getting proper heat transfer.

What are the approach temps?

[Healey Nut]

Sounds like you're not into the 40's because your simply short on capacity since your effciency is crap... meaning you've hit RLA, but just are getting proper heat transfer.

What are the approach temps?

Hes got 27 gals of waste oil floatin around in there ....... Approach temps dont matter squat right now .

[mr hottstepper]

Hes got 27 gals of waste oil floatin around in there ....... Approach temps dont matter squat right now .

Analysis shows I 91.2% oil, 1.4% coolant and 7.4% solids.so uess I am gettin out mainly oil yay!....but will I get back lost efficency? because I've removed abt 12 gallons and no improvment water temps still hi like

[tcy612]

Actually, I would be interested to see the trend/ relationship between the evap approach and the amount of oil removal...
If the amount of oil suspected to be in the machine is accurate, the evap approach should be out of sight (10+°) & coupled with the current condenser conditions, I'm surprised that machine isn't in or near stall/surge.
I agree with earlier post, at 14# head, either non-condesables exist or the instrumentation is Inaccurate...

[Nuclrchiller]

There is so much oil, it probably has some oil floating on top (as Healy Nut said) of the refrigerant/oil mixture in the evaporator. The refrigerant is saturated to the point that it will not "absorb" any more. Conditions won't improve until the "excess" oil floating on top is removed (actually, absorbed into the refrigerant) and then further oil that is removed will decrease the amount of oil that is dissolved in the refrigerant. That oil floating on top can lower the evaporator pressure further. The layer of oil is a restriction.

[Nuclrchiller]

Analysis shows I 91.2% oil, 1.4% coolant and 7.4% solids.so uess I am gettin out mainly oil yay!....but will I get back lost efficency? because I've removed abt 12 gallons and no improvment water temps still hi like

Has high entering condenser water temp been resolved ?

[mr hottstepper]

Actually, I would be interested to see the trend/ relationship between the evap approach and the amount of oil removal...
If the amount of oil suspected to be in the machine is accurate, the evap approach should be out of sight (10+°) & coupled with the current condenser conditions, I'm surprised that machine isn't in or near stall/surge.
I agree with earlier post, at 14# head, either non-condesables exist or the instrumentation is Inaccurate...

I am on my way to d job site should be ther in abt 2 hs,will check approaches den

[mr hottstepper]

Has high entering condenser water temp been resolved ?

Gonna check on that