How much r22 gas pressure & quantity in 1,1.5,2 ton split ac?

There should be a label on the indoor or outdoor unit telling you the charge amount. You also have to consider the length of the pipe run which may need extra R22 added per meter after about 7m. But since R22 is being phased out world wide, it is usually extremely expensive and you're probably better off cutting your losses and installing a new one.

Doesn't matter how big the unit is, pressures remain the same. On a satisfied temperature, approximately 75 degrees, r22 should be around 65 psi. The hotter the house, the higher the pressure. Head pressure varies on outdoor temperature. 90 degrees outdoor temp, approximately 200 to 225 psi on high side.

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depends on the gas, R22 60 psi minmum 410 110-130 psi pressure always the same for 2,4,etc tons the amount chenge

68 to 75 depending on the heat load. same for all tonnages.

Your suction pressure will always vary depending on many variables. What type of freon??? If you find your freon type on a PT CHART(PRESSURE/TEMPERATURE), 65-70 psig will have a temp that is 38-41°f. Most evap coils should be a bit warmer but not much. BUT, again variables! Coils are clean, indoor temp, blower speed, return air opening, supply ducts. Also superheat should be a factor. If you have 65-70psig, that freon temp(per pt chart r22) is 38-41°f, then using a temp sensor/meter to measure the actual temp of the suction line. Subtract 38-41 from the actual temp and that give us a superheat reading. This # should be around 8-12°. But again variables! If the unit has an expansion valve? Seems like you are close if its r22.

R22= 70-80psig
R410a=120-130psig
Depending on many variables such as blower speed, coils clean, indoor/outdoor temps.

The system has a lot of air in it. If u haven't had any AC wk done on it that mean there is a leak in the system. System must be evacuated, pressurized & find the leak. Repair the leak, vacuum air from system & charge w proper AC gas. SPECIALIZED EQUIPTMENT & GAUGES NEEDED. good luck

This is a 2.5 ton unit. The 30 in the model # stands for 30K btu's which equals 2.5 tons. How many square feet is your house and is it insulated?

65 psi is the ideal pressure remember its not exceede from this pressure.
and it is valid for all season