User Manual 5.1-1 (2018-09) 34
Subject to change
Series FK92K
FK90K fire dampers
Installation/functional test and servicing/maintenance-free
Functional testing and servicing
•
Fire dampers must be serviced by the owner and test-
ed periodically for correct functioning. The intervals
largely depend on the system operation. The relevant
regulations should be followed.
•
Functional tests are limited to the release and re-open-
ing of the FK90K fire dampers. This can be performed
by remote control with an electrical actuator.
•
Repairs or service work are required in the event of
malfunctions.
Original spare parts must be used for this.
•
Cleaning work required in ventilation systems for
hygiene reasons must be performed in an opera-
tion-dependent manner, and also includes the fire
dampers.
Feature: Maintenance-free
•
FK90K fire dampers of the series FK92K are mainte-
nance-free due to fully enclosed components, corro-
sion-resistant materials and precise manufacturing.
The drive mechanism is made of stainless steels and
housed in enclosed casings, which means it is not
directly in the air stream. The release mechanisms
and actuators are also configured accordingly.
There is no need for regular cleaning and lubrication,
which would otherwise be necessary.
Sealants and all other materials are designed durably
and for a long service life.
•
The reliability of the FK90K fire dampers is due to the
special drive mechanism with dead-centre positions in
the opened and closed positions. This ensures secure
closing and locking, and reliable signalling of the limit
positions.
This is the only way to carry out remote-controlled
functional checks and automation reliably.
•
Manual functional checks are limited to the closing
and opening of the FK90K fire dampers.
•
Two control openings are provided for inspecting the
interior of the fire dampers; one above and one below
the damper blade. The position and size of these
openings are specially adapted to the FK90K fire
dampers and are fully adequate.
FK90K fire dampers are largely insensitive to dust and
dirt.
Installation
•
FK90K fire dampers must be installed based on the
instructions in this user manual.
Structural requirements for walls, ceilings, ventilation
ducts etc. must be met by the customer.
The general technical regulations and national statuto-
ry regulations must be observed during installation.
In Germany, this specifically relates to the "Guideline
on fire protection requirements pertaining to ventila-
tion systems" (
Lüftungsanlagenrichtlinie
- LüAR).
•
FK90K fire dampers may be connected to ventilation
ducts made from non-combustible and combustible
materials, as well as to flexible connectors.
Thermal expansions must not exert significant forces
in the event of fire. If required, compensatory meas-
ures must be taken for this purpose, for example,
suitable line laying or the installation of flexible con-
nectors made from combustible materials.
•
In Germany,
release mechanisms
for a nominal
temperature of 95°C are permitted for hot air heating
and for building areas with sprinkler systems in some
cases.
•
FK90K fire dampers
• Do not need spacing to separate them from com-
bustible materials.
• Are suitable for all installation positions.
• May be installed "flange-to-flange", even in metal
stud walls.
•
Electric wiring
must be performed on site.
•
Potential equalisation conductors
to bridge flexi-
ble connectors on fire dampers can be fastened with
metal screws if they are made of copper and have a
cross section of up to 6 mm², or if they are made of
aluminium.
•
Connection areas of the FK90K fire dampers can be
thermally insulated
, for example, to protect from
condensation
in external air inlets. Flame-retardant,
closed-cell foam can be used, for example Armaflex.
Otherwise laminated mineral wool must be used.
Thermally insulating the
FK90K fire damper
The installation area (wall
thickness W) must remain
non-insulated.
Insulated
connection area
Insulated
connection area
The
operating instructions
for FK90K fire dampers are
available to download online at www.wildeboer.eu.
