ReplyTry adjusting the pressure regulator. If your oil and filter are as dirty as you say then the regulator might be FUBAR as well.
Why aren't the oil and filter being maintained? Just asking....
Regular Guest
Hey Guys,
I have a question on a York YT Chiller. I getting High Oil Pressure faults. I looked though the information that I found on site and found that it will shut down the chiller at 60psi. I isolated and changed my oil filter it was pretty dirty and the oil was black. I Check both sensors/ Pressure Transducers they both read about the same with the chiller OFF. I put a gauge on the oil pressure filter after refilling with oil and I manually started the pump the pressure shot up to 110psig on my display screen on the chiller it maxes out at 60psi and then goes to XX.X for readings. Both my inlet and outlet valves are open I made sure of that. If you try to start the chiller it will fail in Prelube due to the high pressures. Any help would be Great.
Professional Member
Try adjusting the pressure regulator. If your oil and filter are as dirty as you say then the regulator might be FUBAR as well.
Why aren't the oil and filter being maintained? Just asking....
Regular Guest
Thats a great question that I can only say I have not a clue to as of right now. We took over this account last year some time and I'm not sure why they did not send us out to get oil samples on the chillers and Parts list together for preventive maintenance. I backed of the the regulator and retested it and got the same pressures. I also have the York parts break down and they call it a Relief Valve. What is the Proper operation of this valve? I can only assume that if the pressure is to High it should dump it back into the oil sump? I will w be ordering oil and other odds and ends to do the PM on this machine asap.
Professional Member
Yes, York calls it a relief valve and it does as you say. We may run into a problem here. This conversation could get technical in a hurry and since this is an open forum I don't like to talk too specifically. The conversation should take place in the Pro's Forum. Perhaps you can find a way to get your post count up and apply for Pro status.
Professional Member
i had transducer on start up do the same thing it was bad right on start up fun
Regular Guest
I was hoping it was just a transducer, but not the case. Once I put my gauge on the oil lines and watched climb up to 100psi I knew it was other problems.
Professional Member*
Originally Posted by KnewYork
Just asking, would someone have to pull the gas to replace the regulator ? Or can the oil circuit be isolated to do this ?
Professional Member
If you are really fast ,you can do it! On the other hand that inch and half pipe on the top of the oil tank, (compressor oil drain back to sump with out iso. valve ), looks pretty intimidating.
Professional Member*
Accident
Professional Member
If a person were very careful, knew the proper procedure and had the proper fittings with them, that valve could be changed without removing the charge. It certainly wouldn't be recommended for the inexperienced or the faint of heart.
Regular Guest
My Boss told me to pull the charge at the end of the day I did what i was told to. On another note when I recovered the charge I notice the Gauge on the external rupture disc dropped in pressure. I pulled the relief valve off the top of the disc to find that the disc was broken which explains why I was not able pull out the complete charge of R123. More fun to be had.
Professional Member*
You don't happen to have apic of the broken disc do ya?
no signatureblast'em man blast'em
!!!KILL THE TERRORIST!!!
Regular Guest
Yes I have several pictures. I will try and get them up tonight or tomorrow.
Professional Member*
Schweet
no signature
!!!KILL THE TERRORIST!!!
Regular Guest
Here are some pictures of the blown rupture disc.
Professional Member*
Thanks- do u know what makes this happen- the negative pressure? I would not think so-
Regular Guest
Positive pressure causes this I believe its 15psig when it will blow.
Professional Member
Yes, they rupture at 15 PSIG. My question is what caused the high pressure to occur in the first place and secondly how no one diagnosed the problem before an attempt was made to pull the refrigerant charge?
Regular Guest
I talked to another tech the other day he said he was there in the winter and they where running hot water though the chiller. He said it was from a valve passing. I have yet to have time to look for the valve. How would you diagnose the rupture disc was blown? I never saw the chiller run due to the high oil pressure would lock out the chiller. I also found the control shaft leaking when I leak check the machine. That was really fun to change let me tell you my heart was beating fast when pulling the stud out to install the bolt for final assembly.
Professional Member
I got a little ahead of myself. I was thinking carbon rupture disk which is a little different than what you have. You have the type that will relieve pressure until it drops below a certain level and spring load shut again to help save losing all the charge. When you walk up to a chiller with the relief device you have there there should be a gauge on the downstream side of the disk. If that pressure is the same as the vessels, then something is wrong.
I would question why the tech didn't run a red lag up the pole when he discovered hot water running through the chiller. Definitely a cause for alarm.
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