The temps you show are in and out refrigerant temps at the condenser not water? Wonder how it would act if you pushed it to 130 F high side. But 20 psi suction seems low = -6 degrees F. Did you just add charge til the amp draw increase leveled off or??
I have a 3/4 ton ebay txv for mine - it was $25 shipped but it is external equalized and I know nothing about txvs!
I wonder why no one seems to use r134 in these - is the oil not compatible - the p/t seems better.
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