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  • Users: sha3rawy
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  1. sha3rawy

    PC control or microprocessors and pic are better

    Thanks for help. I am sorry I didnot write the problem in detail I have an electric power plant, diesel engines as aprime movers with 1MW for each the plant is controlled with acombined digital analog control system, but alot of faults generates with no indication for the cause the monitoring...
  2. sha3rawy

    PC control or microprocessors and pic are better

    Hi I would like to use the pc to control aworking machine or any equipment in another way I would like to use the pc to monitor the equipment working parameters so the men in duty can control the equipment in service remotely from acontrol station without any need for localy control. a...
  3. sha3rawy

    AC compressor oil consumption

    Hi, I have AC unit of 80 tons capacity with aworking compressor w-type (carrier) it has been retrofited to R-134a,using synthetic poloyol ester oil as a lubricant,I know that the oil may be transfered through the system as amist with the refrigerant. may concern is to know the actual oil level...
  4. sha3rawy

    How worse is the R 134-A ?

    Thanks imok2 For step (2) I know that for the R-12 refrigerant it has aspecial oil ( mineral oil )to have the designed solubility value and on the other hand the R-134-a has another type of oil not matching with the R-12.also the oil that I am using it now for the 134-a is synthetic polyol...
  5. sha3rawy

    How worse is the R 134-A ?

    Yes the type of the oil has been changed, and also the system has been flushed with the recoverd R-12 ( old charge ),but I wonder its the manufacture modification not me or any body else so why the manufacture didnot inform us with that ? and Is there any action I can do to adequate my...
  6. sha3rawy

    How worse is the R 134-A ?

    is the R 134-a has any cleaning or corrosive effect on the metal of the piping , here is my problem i have an air conditioning unit with carrier compressor it has been modified from R-12 to R-134-A after 100 hrs of operation a sample of oil shows some dirts (oil is black ) no metal content or...

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