Hi,
Although I have fitted many home split A/C units I have never had to top-up or pre-charge a unit. I now have a new split unit which is not charged with the R407C gas. I have a vacuum pump charging lines with gauges, a set of refrigeration charge scales and a full new 11Kg bottle of gas. I would like the satisfaction of learning how to charge or top up a unit, so thought I would ask someone how.
Q1. Can anyone advise me if I have ALL the necessary equipment to charge the compressor?
Q2. Can I charge the external compressor without connecting the pipe work to the internal cooler (The compressor specifications gives me the pre-charge weight of refrigerant)?
Q3. Can anyone explain from A-Z how I should charge the compressor (I assume using the refrigerant and or evaporator valves?
Any help will be very much appreciated.

Garry