Is it possible to tilt the connection line upwards?

Yes, the refrigerant lines can be installed in any direction, and the indoor and outdoor units can be at different heights.

However, it's important to note that the indoor unit must have a condensate drain hose connection with a downward slope.

Exception:

The ceiling-mounted cassette version comes with a condensate pump and a drainage system that can reach up to 32 inches upward.