Mounting on the ceiling

The Vallox 125 MV units (excluding model B) can be equipped with an optional ceiling mounting plate.

Note: The ventilation unit is very heavy. Do not perform this procedure alone. Use appropriate lifting equipment, where necessary.

Installing the ventilation unit to the ceiling mounting plate:

  1. Check that the condensate insulation rings are in place in the outlet collars below the ceiling mounting plate.
  2. Pull the operating levers (A) out and lock them by turning them towards the outer sides of the unit.
  3. Remove the door before installing the ventilation unit to the ceiling mounting plate.
  4. Lift the ventilation unit close to the ceiling mounting plate and feed the cables and the connection box through the hole in the ceiling mounting plate on top of the ceiling.
    Note: Remember to make a service door in the ceiling so that the cables and the connection box can be accessed. The distance between the service door and the ceiling mounting plate must be around 500 mm.
    Alternatively, the cables can be fed to the rear wall between the ceiling mounting plate and the ventilation unit. Lift the ventilation unit up against the ceiling mounting plate by releasing the locking of the levers (A) by turning them towards the center of the unit; the levers will lock the unit to the ceiling mounting plate. Where needed, guide the mounting hooks on the ceiling mounting plate (B) to the grooves on the side panels of the ventilation unit. In the locked position, the levers are at the same level as the front edge of the ceiling mounting plate.
  5. Where required, the unit can be detached from the ceiling mounting plate. Remove the door of the unit, lift the unit slightly upwards, pull out both operating levers (A) and lock them (see section 2).

Attic floor penetration plate

The attic floor penetration plate (D) is optional. When an attic floor penetration plate is used, the tightness of the vapour barrier has to be ensured.

The attic floor penetration plate can be fastened on the finished rear wall. The minimum distance of the attic floor penetration plate from the finished side walls is 15 mm.