How do you charge a R410a air conditioner?

hook up your guages, look for the system pressures. the high side should be around 800psi. the low side should be around 400psi. if your pressures are below this charge accordingly. if you have a system leak, pump some bacon grease in the system. it works wonders!! then when you are fininished dump the rest in your pan and cook you a celebration dinner. enjoy your properly charged r410a system!!