Vents VN Series User Manual page 15

6.4. Before installing the casing, make sure that the fire retardant spring-loaded non-return valve of the KP 80 casing, which
will be installed in the niche, closes in the absence of air flow under the influence of the spring.
6.5. Install the KP 80 casing into the recess and fix it with mortar.
Attention! It is not allowed to have gaps between the casing and the hole in the wall.
Route the power cable through the gland in the rear side of the casing, the minimum cable length from the housing should
be at least 250 mm. (Fig. 60-61).
The casing can also be mounted on a wall or ceiling using mounting brackets (Fig. 19).
6.6. Once the installation has been completed, cover the casing with the cardboard spacer to prevent damage or
contamination during the fit-out works in the space (Fig. 54).
To perform the final installation of
7.1 On completing the fit-out works in the space remove the cardboard spacer and install the VNV-1 80 fan assembly (Fig.
56-57). The mountings allow fine adjustments of the grille angle relative to the fan casing for a level fit even if the casing is
misaligned (Fig. 58).
*If you purchased the casing separately and the fan assembly separately, you do not need to complete these steps.
Before installing the fan, check the position of the backdraft damper (2), which must close under its own
weight in the absence of air flow. By default the position of the backdraft damper corresponds to the
direction of the outlet connection (1) to the right and upwards (Fig. 59).
To rotate the valve, remove the fan assembly from the casing, remove the backdraft damper, install the
backdraft damper in the correct position (so that the blade closes), and reinstall the fan assembly into
the casing.
KP, KV
fans, it is necessary to do the following:
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