excessive oil in refrig system

[jhv1]

i have 3 carrier split systems 5 tons,change discharge
tubes that were manufac incorrectly from factory having
trouble with high head and low back, possible oil restricting refrigerant flow back to condenser.how do i get oil out of evap coil/piping.and back into compressor

[vmc1161]

You have three separate units doing the same thing? All after you made repairs to the discharge lines? I would be very surprised if oil was the problem, look for restrictions at the dryer or service valve or metering device. How did you charge these units. Post more information and someone will respond with what info. you need. Good luck, sounds like you will need it.

[djken]

What is the model and serial number? What metering device?

[fat eddy]

Do any of them have hot gas ?

Carrier has a fitting they call an ACS or ASC, something like that,

that comes with a new orifice for the coils,, you need to check if you have the right ones installed ,, it is a screwy thing and a screwy setup,, but I have seen it cause problems.

[djken]

Originally posted by fat eddy
Do any of them have hot gas ?

Carrier has a fitting they call an ACS or ASC, something like that,

that comes with a new orifice for the coils,, you need to check if you have the right ones installed ,, it is a screwy thing and a screwy setup,, but I have seen it cause problems.

What the #$%@ are you talking about??

[service guy]

Easy djken eddy is right I have had this problem more than once, however the red flag for me is why all 3 splits acting the same way??? Jhv1 we need more info pressure's would be helpful lenghth of line set and type of metering device, Gather all the Info you can and get back to us we'll be glad to help.

[djken]

Just trying to find out what "ACS or ASC that comes with a new orifice for the coils" is?

[fat eddy]

I asked if he had hot gas , he didn't say if these were residential or comercial,, carrier has an unorthodox way of dealing with splits that add hot gas in the field ,,

They recommend you install a fitting at the distibutor that comes with a new orifice and a hot gas connection port,where the port is located helps in reducing flashing into the evaporator, This device is called an ACS or ASC I don't remember exactly, but it is one of those two names.

If the device was not installed properly or installed with the correct orifice it could theoretically cause oil log into the evap.

[fat eddy]

The orifice is not the metering device, it is located after the TXV and before the distributor.You would only see these on commercial units if you added hot gas to them.

I thought he was talkning about commercial equipment since he is posting in the commercial forum

[djken]

oooooooohhhhhhhh .... For some reason I thought you were talking about something at the condenser.
I would guess that he has a residential unit.
I have yet to see a 5 ton unit with HGB, be it either res. or comm..

[fat eddy]

I see hotgas on all sizes,almost all commercial chillers and liebert units use hot gas on all sizes.In general very few units I see are without it

[fat eddy]

Dj,

Went to my dirty truck and looked it up,

It is an A.S.C., made by sporlan for Carier,
Auxilary Side Connection,

It is a pain in the ass , and you can expect it to add four hours to a Hotgas retrofit ,,, or new split system install..........What will they think of next ?

[hvac3901]

did'nt read thread i will admit, but if you are convinced that the repair was made, then the normal operation of the system will return the oil. it is a little risky if the oil is indead in the evap but refrigerant flow should return.

[vmc1161]

Originally posted by fat eddy
Dj,

Went to my dirty truck and looked it up,

It is an A.S.C., made by sporlan for Carier,
Auxilary Side Connection,

It is a pain in the ass , and you can expect it to add four hours to a Hotgas retrofit ,,, or new split system install..........What will they think of next ?

Eddy: The A.S.C. mounts on the distributer and usually in the distributer there is an orifice that has to be removed and replaced with one of the proper tonage. Even if your not installing an A.S.C. you still have to replace it. If you have the A.S.C. it goes in it. Many times that is where the problems start, they don't get replaced. I've gone to many jobs to find the installers didn't do it. I would be a little surprised if it was the problem, but who knows at this point. One of the reasons for the A.S.C. is to regulate liquid flow into the evap and to stop liquid from getting back to the comp.


Note: The extra info was for JHV1, i'm guessing you knew that already.

[Dowadudda]

You guys aren't reading well enough. He aint about the coil loggin now. The facory got that figured out by having him change the tubes so it don't happen again. He just wants to know how to move the oil out of the coil, to get back to the pump, to finalize the repair.

Anyway, dude this is what you do. Run your head higher and warm up the TXV bulb. Watch your superheat so she don't go real low. The oil will be back in no time. If you think you pushed it out, then let er run and do a superheat reading, to verify any more logging. Thats a good damn job to do for a good morning call. Nice and easy and cups of hot coffee do the trick.