Operation Manual; Maintenance And Inspection Manual - aldes CF1 Manual Original De Instalación, Uso Y Mantenimiento

Terminal Fire Damper

2 Operation Manual

The terminal fire damper is ready for use when its blades are open according to chapter 1.3 adjusting the Damper
into Operating Position. The blade position, if using a DV1 version, is indicated by an end switch, which indicates the
damper blades' open and closed position. The microswitch contains three isolated wires (see Fig.5) which need to
be led out of the duct through a hole drilled in the pipe as close to the microswitch as possible and near the wall, the
hole being secured with a rubber grommet.

3 Maintenance and Inspection Manual

The actuating mechanism keeps the dampers on stand-by mode throughout their entire operational life. Without
the producer's permission, there must be no changes or modifications performed on the damper's structure. The
operator executes regular damper checks according to the local laws and regulations. Unless stated otherwise, the
operator checks the damper every 12 months.
CF1 - CF2 is checked visually after having removed the disc valve from the duct end. If the damper is installed in a
duct crossing a fire-proof wall, to access the damper it is needed to disjoin the duct pipe near the wall, on the side
where the damper blades open. For this purpose it is convenient to use a flexible coupling during installation which
facilitates the access inside the damper.
It is needed to check the damper's internal casing, the thermal fuse link, the sealing, the foaming substance, the
damper blade's condition and its closure while it leads to a backstop in a closed position. There must be no other
objects or dirt from the ventilation duct inside the damper. While performing the check we also focus on the thermal
fuse link's integrity and a correct position of the damper blades after their detention in the OPEN position – they
should be roughly parallel to the longitudinal axis of the duct.
We perform the damper activity check by taking off the thermal fuse link and releasing the blades to spontaneously
close themselves – the damper blades are closed by a spring return release. The damper must be completely closed –
the blades must fall behind the detent springs. If using the DV1 version, the blade's position is indicated by a
connection of the respective circuit shown on Fig.3. After having checked that the sealing is intact and abuts against
the whole perimeter of the blade to the damper body, we open the blades again and detent those in the OPEN position
using the thermal fuse link. When opening the blades it is first needed to push the detent spring and use the hook
attached to the opening of the thermal fuse link's holder to open the blade. Before opening the second blade it is
possible to secure the first blade in the OPEN position by inserting an appropriate object between the blade and the
damper body (this object must be removed after the thermal fuse link is put on).
In case of bad access when checking the damper functionality by a complete closure of the blades (the damper is
too small, the duct pipe in the wall is too long...) it is possible to detach the damper from the duct. We can do so by
either pulling it out of the duct while holding it by its open blades or it is needed to disjoin the pipe on the other side
of the wall as well and push the damper out of the duct. If using an end switch signalizing the damper blades' closed
position, it is necessary to disconnect the switch wires from the terminal outside of the duct and pull the wires into
the duct before detaching the damper itself. After doing this, it is possible to take the damper out of the duct. When
remounting the damper into the duct it is also essential to check the flexibility of the draft seal on the perimeter and
in case it shows permanent deformation, it is needed to replace the seal by a new one in order to guarantee a correct
fixation of the damper in the duct.
Recommended Check Steps According to the EN 15 650 Regulation
1. Date of inspection.
2. Check of the end switch's connection for damage if applicable.
3. Check for damper cleanliness and cleaning if needed.
4. Check of the blades and sealing, correction.
5. Check of fire damper's safe closure - for details please see the previous section.
6. Check if the damper moves while being in its open and closed position, correction.
7. Check of the end switch indicating the open and closed position, correction.
8. Check if the damper is moved in its standard position. The CF1 - CF2 damper's position is correct when, after the
closure, the blades are in between the planes forming the outside surface of the wall – the ideal position is when
the blade is in the middle between these planes.
3.2.1 Replacement of the Thermal Fuse Link
When replacing the thermal fuse link it is necessary to follow the instructions from 1.3 adjusting the Damper into
Operating Position manual – we take off the thermal fuse link and put on a new one.
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