So today I installed a Comfortaire 1 ton ductless split. Pressure tested 350psig with nitrogen. Held for 1/2hr. Checked all flares soap tested. Vacuumed for 1/2hr. 800microns. Release charge refrigerant starts bubbling out of flare nut. Reclaimed charge. Found a small score on the inside of flare. Cut and reflare. Pressure test and vacuum. Install new charge. No bubbles. So why did the first flare hold the nitrogen but not the charge?
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