Mandik FDMB Manual page 106

Flange and screw joints must be conductively connected to protect against dangerous contact. 2
galvanized fan shape pads that are placed under the head of one screw and a fastened nut are
used for conductive connection.
To ensure reliable fire damper function it is necessary to avoid blocking the closing mechanism
and contact surfaces with collected dust, fibre and sticky materials and solvents.
Manual operation
Without power supply, the damper can be operated manually and fixed in any required
position. Release of the locking mechanism can be achieved manually or automatically
by applying the supply voltage.
Before entering the dampers into operation after assembly and after sequential revisions, checks
and functionality tests of all designs including operation of the electrical components must be
done. After entering into operation, these revisions must be done according to requirement set
by national regulations.
In case that dampers are found unable to serve for their function for any cause, it must be clearly
marked. The operator is obliged to ensure so that the damper is put into condition in which it is
able to function and meanwhile he is obliged to provide the fire protection another appropriate
way.
Results of regular checks, imperfections found and all-important facts connected with the damper
function must be recorded in the "FIRE BOOK" and immediately reported to the operator.
Before entering the dampers into operation after their assembly and by sequential checks, the
following checks must be carried out for all designs.
Visual inspection of proper damper integration, inside damper area, damper blade, contact
surfaces and silicon sealing.
Inspection hole disassembly: release the covering lid by turning the wing nut and while turning
the lid right or left release it from the security belt. Then tilt the lid and remove it from its original
position.
Before entering the dampers with manual control into operation after their assembly and by
sequential checks, checks according 16.2. and following checks must be carried out.
Check of thermal protective fuse and closing mechanism.
Exert pressure on double arm initiation lever with a spring to release the control lever and check
its displacement into the "CLOSED" position. Closing must be smart and the control lever must
be firmly locked with a pawl. In case that the closing is not smart enough and the control lever is
not locked with the pawl in the "CLOSED" position, higher pre-stretch of the closing spring must
be set using a ratchet wheel.
Proper function of the thermal fuse can be checked when the fuse is removed from the starting
mechanism pin. The pin must be taken out and the initiation lever must be turned over. If this is
not possible, then the pin and the starting mechanism spring must be checked or the base plate
must be replaced. The base plate is attached to the damper body with three M5 screws and nuts.
Displacing the damper blade into "OPEN" position is done the following way:
Release the pawl exerting pressure and return the control lever into the second outlaying position
where the lever is hold by the initiation lever.
In case of the flap valve with an electromagnet check the control lever displacement into the
"CLOSED" position after connecting to power supply.
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