I'd ask over on the HVAC forum, but I got my head bit off last time.
We have a 21 cuft commercial chest freezer. Quit working. My neighbor was over last night and put on a pierce style fill fitting and put in a couple oz R134a. Got -27 deg F this morning. So, all unit needs is a bit of refrigerant.
Pressure reading on low side is -15 in HG. Any educated guess on what low side pressure i should fill to?
Second question, my neigbor said R134a is a blended refrigerant so you need to have can upside down to put in liquid. This can be a problem slugging a small system. On all my R12 and R22 systems I've just let the compressor suck in vapor off the top. Is it really necessary to have can upside down?