d2itsu APD-12CK Manual De Usuario página 30

Installation in a double-hung sash window(Optional)
5. Close the window sash securely against the Window panel.
6. Stuff the sponge B between the glass and the window to prevent air and insects
from getting into the room.
7. Attach the bracket with a screw.(Recommended)
Please lay a tabular material underneath the window panel in case you could
not attach the rain guard or the window adapter properly due to the deep
window sill.
Bracket
27