I've been working on repairs to my Kitchenaid refrigerator (see http://appliantology...?hl=ksss42qjt00 ) and have become puzzled by the related topic of figuring out how to determine if the amount of refrigerant charge is too low, too high, or just right.
I have the following tools that would seem applicable:
- Manifold gauge
- High and low service ports (high is Schrader valve on the dryer, low is bullet piercing valve on the process port stub)
- IR thermometer
- Recharge adapter with "conceptually" calibrated gauge (i.e. too low, too high, nice, and something else as ranges). This little gizmo screws on top of a small R134a container and also into the low service port.
I also have an evacuator pump, as well as a small digital scale, which I'm hoping NOTto have to use.
What I'm missing is the process for determining the proper amount of refrigerant. In theory I could evac, then recharge using the scale to determine if the 6.7 oz requred had be inserted. But that seems like overkill, and further is not really useful as a way to spot check given the suspect very slow leak in the system.
Are there any quantitative measurements and procedures I could use to figure this out? I assume there must be, I just haven't been able to find them.