Understanding how the AC control lever works

[davepl]

Can anyone confirm at least this one part? I just want to make sure I'm chasing the right rabbit here, to coin a phrase. This is how I'm going to -try- to make it work, but want to ensure that's how it's -supposed- to work.

TWO PORT:

- When set to INSIDE, Vacuum ON Port 2
- Vacuum ON (Port 2) closes outside door
- Vacuum ON (Port 2) opens the inside door
- Vacuum ON (Port 2) closes the hot water valve
- And so, cold air recirculated from inside the cab

- When set to OUTSIDE, Vacuum OFF Port 2
- Vacuum OFF (Port 2) opens the outside door
- Vacuum OFF (Port 2) closes the kick panel door
- Vacuum OFF (Port 2) opens the hot water valve
- And so heater core active again, outside air mixed hot and cold by temp lever