Original message
| beginner
 |  "high super heat"
, posted Sun 3 Oct 03:06  
I worked on a reach in refrigerator cabinet today. It is air cooled, capillary and using 134A. The unit was not cooling much only at 55 deg. First I checked the air flow on the condensing. It was clogged with little hot air coming out. I cleaned it. Check the low side was reading 30 pisg, and it is blowing out 55 deg. The superheat is 20. What else am I missing? I can't bring the temperature down to around 35. There is water dripping out from the vent. I should had check the evaporator coil. Could it be dirty which causes the high superheat?
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Replies:
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| Xenos
Webmaster 
| "Re(1):high super heat" , posted Sun 3 Oct 09:22
You mention you cleaned the condenser. Did you give it ample time too see if it was cooling? You may need a bit more gas but there is really noting wrong with 20 supper heat. If the indoor coil was plugged and unable to absorb heat then the supper heat would be low. Having high super heat means, the refrigerant is picking up as much heat as it possibly can. So ether it cant get rid of it ( dirty condenser) or there is not enough of it in the evaporator.
Xenos.
The best way to escape a problem is to solve it.
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| | beginner
| "Re(2):high super heat" , posted Sun 3 Oct 21:26
OK! I went back to the client today. The unit is working fine now. You are right about give it a little time for the system to run. I was a little tired and working on 2 units that night until 2 AM. Capillary system requires a longer time to stablized. I will keep that in mind. Thanks again.
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