How do I charge systems using Puron or refrigerant 410A?

?? Same as R-22. The equipment should have a charging chart, you will probably be charging using head pressure and sub cooling though, instead of suction pressure and super heat. I'm not sure what you are asking, and it would be important to know what you are doing exactly, new install? Replacement? What's the seer?

First you better take a approved course in the use of that refrigerant.

That is a much higher pressure refrigerant and uses special higher pressure rated gauges and hoses.

410A has a oil in it that just loves moisture and is very hydroscopic.

Units that use this refrigerant especially do not like the moisture and the unit can be damaged.

Most if not all manufactures have a protocol that requires a new liquid line filter and a professional vacuum pulled with purges through a reclaim system for proper charging.

The pressures that R410 run at are totally different than R22 so you better know what you are doing when you set the superheat or subcooling on the unit or damage/low efficiency will be the result

I am just telling you this to save you some possible trouble and money.

If you really have to know how to charge R410 properly do a Google search. I am sure there is much info out there and with charging R410 refrigerant being more difficult that R22 the information will cover more material than I can type here.

Your question leaves out a lot of information... my only comment is you ONLY charge R-410a to systems designed and built by the manufacturer for R-410a. The spec. / ID plate on unit will tell you the refrigerant to use. As hvac1000 stated, you best know what you are doing, and that is way to complex for this web site to properly answer, nor would I want to ( as a R-410 instructor for certification to use this refrigerant) You would want to look to some HVAC wholesale supply houses or HVAC manufacturers to take a R-410a class. If you are NOT a HVAC contractor, you will not be able to attend the class. Safety is the main issue here,. TO YOU! And the equipment damage / operation from miss use of R-410a is the other issue... This is really up to a qualified and R-410a trained HVAC tech to be performing a charge on a system.