Mandik FDMS, Manual

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Damper bodies are supplied in the design made of galvanized steel plate without any other surface finishing. The round duct joint
is made of galvanized steel and boards from mineral fibers. Damper blades are made of fire resistant asbestos free boards made
of mineral fibers. Damper controls are made of galvanized materials with no other surface finish. Springs are galvanized. Thermal
protective fuses are made of sheet brass, thickness = 0.5 mm. Fasteners are made of galvanized steel.
Specifications for stainless-steel models – classification of stainless steel:
● Class A2 – Food-grade stainless steel (AISI 304 – EN 17240)
●
Class A4 – Chemistry-grade stainless steel (AISI 316, 316L – EN 17346, 17349)
The respective stainless steel is the material for all components present or accessing the damper interior; components outside
the damper body are typically from galvanised sheet metal (fasteners for mounting the servo drive or mechanics, mechanics
components except Item 4), frame components.
The following components, including the fasteners, are made from stainless steel at all times:
1) Damper body and all components permanently attached
2) Leaf holders, including pins, metal parts of leaf
3) Control components inside the damper (leaf angle selector, pin with lever)
4) Mechanical components entering the interior of damper body (lower sheet of mechanics, lock holder “1”, lock lever “2”, lock
spring, 8 dia. stopper pin, mechanics pin)
5) Inspection hole cover including the clip and fasteners (if they are parts of the cover)
6) Bearing for torque transfer from the lever with pin on the angle selector at the leaf (made from AISI 440C)
The leaf of the damper is made from two Promatect-H sheets, thickness 15 mm, connected with stainless-steel fasteners of
corresponding class.
Plastic, rubber and silicon components, sealants, foaming bands, glass-ceramic seals, housings, brass bearings of the leaf, servo
drives, and end switches are identical for all material variants of the dampers.
The thermal link is identical for all material variants of the dampers. Upon specification by customer, the thermal link may be made
from A4 from stainless steel sheet metal.
The temperature-dependent initiator of the servo drive (sensor) is modified for stainless-steel variants of the dampers; the
standard galvanised screws are replaced with stainless-steel M4 screws of corresponding class the counterpart has stainless-
-steel riveting M4 nuts.
Some fasteners and components are available in one class of stainless steel; the type will be used in all stainless-steel variants.
The leaf in the variants for chemical environments (Class A4) is always treated with a coating of chemically resistant Promat SR.
Any other requirements for the design shall be considered atypical and shall be addressed on an individual basis.
The appliance is constructed and preset by the manufacturer, its operation is dependent on proper installation and adjustment.
Dampers are transported on trucks, on transport palettes or boxes, so that the fire dampers are protected from direct water impact.
During transportation, handling and installation processes. The ambient temperature must not 40°C. During transport,
the damper blade must be in CLOSE position. Dampers are stored indoor in environment without any aggressive vapors, gases
or dust. Indoor temperature must be in the range from -30 °C to +40 °C and maximum relative humidity 95 % (avoid condensation
on the damper body). Dampers must be protected against mechanic damages when transported and manipulated.
All effective safety standards and directives must be observed during fire damper assembly. To ensure reliable fire damper
function it is necessary to avoid blocking the closing mechanism and contact surfaces with collected dust, fiber and sticky
materials and solvents. Assembly, maintenance and damper function check can be done only by qualified and trained person, i.e.
“AUTHORIZED PERSON” according to the manufacturer documentation. All works done on the fire dampers must be done
according international and local norms and laws.