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Replacing a water cooled condensor
when working on the trane unit in the computer room, there are three units in this room, I found one completely out of gas checking it out I could not find a leak until I took the union off at the water regulating valve and stuck my leak detector in it. Yep, the leak is in the water side of the condensor.
Now I have to put a bid on this job to repalce it. I would just tell them to replace the unit but there is no way of getting this unit out of the ceiling. The trades put there cable racks under the unit and sprikler lines too. No one care about the service guy.
Anyway, tomarrow I have to go back and take a megaohm reading to see if there is any sign of water in the compressor. I shut the water off to the unit after I drained it and left a vapor charge of nitegen and R-22 in it.
I was thinking if the unit checks out okay and I did the job I would do a Triple evacvuation change the dryer three times put a sight glass and valve before the dryer to pump it down to change the dryers. Put one charge in run it and then take the charge back out after about an hour put a clean charge and dryer ( number two of the three ) and then come back a day later megaohm test it and change the dryer again if needed I have figure 20 hour for the job letting the vaccum run over night. I was wondering if you would do anything else to insure a clean system. By the way I told them I could not warrenty the compressor because of the potential water damage.