48K Mitsubishi H2i pressure test results
I’ve done probably a half dozen single zone mini split installs. I always pressurize the (only) low side service port to 200psi and then move to evac after an hour assuming no loss.
This one is for my own home and has been a job. It uses a branch box for 5 zones. Going by the book for a change, and it says pressurize both 1/4” service ports to 600psi overnight. After an hour last night, steady at 600 so went to bed. This AM I show I’ve lost 200 psi on high side, but low side is still perfect.
I don’t understand, shouldn’t they equalize? I’ve never even pressurized the high side in the past. Appreciate any and all input, 12f in Kansas today and we have a new baby who’s reacting poorly to our wood stove. Thank you!
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