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2 totally different refrigerants, 134A is considered a low temp refrigerant used in refrigeration and automotive where R410A is a medium temp refrigerant for residential and commercial air conditioning
R134 a systems will have a larger fitting to prevent you from mistakenly mixing the refrigerants
Suction somewhere between 120 and 150. Head between 360 t0 420
Pressures should equalize within about 15 minutes of running.What is current ambient temp?