wulff
29-09-2010, 05:47 AM
Girina recently asked a question regarding how much oil migrates through a system and returns to the compressor.
I have a similar question, I am using an HC blend to replace 134a in a large ice bank cooler. There are a lot of tubing as the 'evaporator' is a series of tubing in a 100 gallon water tank. It has an accumulator on the high side and the low side. When I tore the system apart (due to failed compressor) I only was able to drain about 5 ounces of POE oil from the compressor.
So I think failure was apparent (oil starvation). When I installed the replacement compressor I added more (about a quart and a a half more ) than the one quart oil I drained (alkybenezene oil) from the compressor I am using.
Why didn't I find ANY old oil in the accumulators? Does POE oil not move through the system?
I am worried the HC blend (Enviro-Safe Industrial 12a) will move the oil to the accumulators and just stay there, starving the compressor.
Would you experts recommend adding even more oil to the system?
The original charge was 13 pounds of 134a, I can't get help from the manufacturer because I think they are idiots, I called 3 times and was told to use 8, 13, 14 pounds (they change the amount every-time I call!! the plate says 13 pounds so I will go with that but use less due to HC).
HELP!! My boss is wanting to get this running but I don't want to give it any reason to fail right away!
I have a similar question, I am using an HC blend to replace 134a in a large ice bank cooler. There are a lot of tubing as the 'evaporator' is a series of tubing in a 100 gallon water tank. It has an accumulator on the high side and the low side. When I tore the system apart (due to failed compressor) I only was able to drain about 5 ounces of POE oil from the compressor.
So I think failure was apparent (oil starvation). When I installed the replacement compressor I added more (about a quart and a a half more ) than the one quart oil I drained (alkybenezene oil) from the compressor I am using.
Why didn't I find ANY old oil in the accumulators? Does POE oil not move through the system?
I am worried the HC blend (Enviro-Safe Industrial 12a) will move the oil to the accumulators and just stay there, starving the compressor.
Would you experts recommend adding even more oil to the system?
The original charge was 13 pounds of 134a, I can't get help from the manufacturer because I think they are idiots, I called 3 times and was told to use 8, 13, 14 pounds (they change the amount every-time I call!! the plate says 13 pounds so I will go with that but use less due to HC).
HELP!! My boss is wanting to get this running but I don't want to give it any reason to fail right away!