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Hi All, The refrigerant of a mini split will be pulled into a recovery bottle in order to do a brazing repair inside the outside unit. Once done, I will have to vacuum the entire unit and put back the refrigerant. So my question is regarding vacuuming the entire unit. Any risk oil will be...

Hello, Looking for advice for checking charge level on a 410a mini-split. The unit is with an orifice metering/throtting device. I am confused on whether or not i can use a superheat measurement (vs. value off table comparing inside and outside temp). I once read that all these fixed metering...

Hi, Most split systems i have installed in my home have been with TXV. Recently I have had the 'pleasure' of installing a cheap unit that uses a capillary as the throttling device for refrigerant expansion. On this specific unit, I noticed that if the refrigerant is low, the output of the...

Hi All. I have a question regarding mini-split installs. It appears that while compressor is running, in cooling mode, if you close off the discharge 3-way valve (stopping the liquid line from feeding the lineset), pressure monitored at that port (suction side) drops to zero or vacuum, then...