The service ports on your compressor/condensor are a three position valve. If I remember right.
- All the way out the compressor is shut off, freon is in the condenser.
- All the way in the connection to the outside is shut off but the condenser is connected to the evaporator/capillary tubes
- midway all three connections are open
(may be vice versa)
You put the compressor/condenser outside, braze all the connections. pull a vacuum on the line set and evaporator and then add freon based on the length of the line set. Then you open the condenser unit, start it up and see if the pressures are OK.
If all OK close the valves to the service ports, pull off the guages and screw on the brass caps over the ports.