Vasco DX4 Manuel D'installation Et D'utilisation page 101

Step 1:
Break the wall bracket in two and attach it to a wall of sufficient strength
according to the diagram below. Dowels and screws are not included.
Please use suitable fastening materials according to the wall construction.
standard horizontal configuration reverse horizontal configuration
Step 2:
Attach the mounting brackets to the unit. Use the bolts supplied with the
ventilation unit to do this. Then glue the bump caps to the back of the unit.
Always make sure that the condensate water drain connection is always at
the bottom of the unit as shown below.
Step 3:
Place the ventilation unit against the wall by lifting the brackets of the
ventilation unit onto the wall bracket.
HORIZONTALLY WALL MOUNTING 15