icesav
11-03-2011, 05:49 PM
Hi PPl,
Not posted in a while. Had alot of experiance in the past 18 months - working on a new project at work and this one has got me.
We have some split hermetic coolers to upgrade, we are replaceing the compressor all the 1/4 copper tube a new condensor but reusing the old evap coil. The evap coils are all differant ages but all bent in the same config. They are submerged in a water bath in which an ice bank is formed to a point until is cuts off next to a mechanical ice stat....
The situation at the moment is we have guys not willing to use the old coils that have compressor oil still left in them because they think it is detremental to the system, my argument is that oil is always circulated around a system with the refrigerant for lubrication. Some times the coils have water mixed with the oil because of leaks in the heat exchanger hence why we upgrade them to Air Cooled systems.
All I do is send the could into the steam room have them steamed internally until they are clear of oil and then put the evap coil on its own direct onto a vacuum pump and leave it to go down to 2000 microns or (2 Torr).
Will this remove all the moisture or will the vapour condensate inside the coil again as soon as I remove the vaccum ?
If the case is that it does not remove all the moisture what would be the best way to remove it ?
Your comment and suggestions are very welcome, Thank you
Not posted in a while. Had alot of experiance in the past 18 months - working on a new project at work and this one has got me.
We have some split hermetic coolers to upgrade, we are replaceing the compressor all the 1/4 copper tube a new condensor but reusing the old evap coil. The evap coils are all differant ages but all bent in the same config. They are submerged in a water bath in which an ice bank is formed to a point until is cuts off next to a mechanical ice stat....
The situation at the moment is we have guys not willing to use the old coils that have compressor oil still left in them because they think it is detremental to the system, my argument is that oil is always circulated around a system with the refrigerant for lubrication. Some times the coils have water mixed with the oil because of leaks in the heat exchanger hence why we upgrade them to Air Cooled systems.
All I do is send the could into the steam room have them steamed internally until they are clear of oil and then put the evap coil on its own direct onto a vacuum pump and leave it to go down to 2000 microns or (2 Torr).
Will this remove all the moisture or will the vapour condensate inside the coil again as soon as I remove the vaccum ?
If the case is that it does not remove all the moisture what would be the best way to remove it ?
Your comment and suggestions are very welcome, Thank you