mcr WIP type multi-blade fire dampers
“MERCOR” S.A. –
the Company reserves the right to make modifications and changes.
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Operation
The operating principle and behaviour of the mcr WIP type fire dampers depends on the version and application:
mcr WIP/S type fire dampers
These fire dampers remain open during normal operation. They are closed (safety position) in the following ways:
automatically – by actuation of the thermoelectric release
manually – by pressing the control button on the thermoelectric release
remotely – by actuation of the axial electric actuator with a return spring as the supply voltage
disappear
mcr WIP/V type fire dampers for fire ventilation systems
These fire dampers remain closed during normal operation. They are opened (safety position) in the following
ways:
remotely – by actuation of the axial electric actuator without a return spring as the supply voltage is
appropriately applied to the actuator
mcr WIP/M type fire dampers for mixed-mode fire ventilation systems
Depending on the function they serve, these fire dampers remain either closed or open during normal operation.
They are opened/closed (safety position) in the following ways:
remotely – by actuation of the axial electric actuator without a return spring as the supply voltage is
appropriately applied to the actuator
mcr WIP/T type transfer dampers
These dampers remain open or closed during normal operation.
If dampers remain closed during normal operation, opening them (safety position – air transfer) takes places:
remotely – by actuation of the axial electric actuator with a return spring. The dampers automatically
closes after activation of thermoelectric release or after the supply voltage disappears.
remotely – by actuation of the axial electric actuator without a return spring after applying voltage to the
appropriate contact. After widespread of the fire, the damper closes after activation by the building fire
protection system, by applying voltage to the appropriate contact of the damper.
If dampers remain open during normal operation (safety position – air transfer), closing them takes places:
automatically – by actuation of the thermoelectric release
manually – by pressing the control button on the thermoelectric release
remotely – by actuation of the axial electric actuator with a return spring as the supply voltage
disappears
remotely – by actuation of the axial electric actuator without a return spring after applying voltage to the
appropriate contact.
mcr WIP/T-G type pressure relief dampers
These dampers remain open or closed during operation. Depending on the requirements the close or open takes
place by the following ways:
remotely – by actuation of the axial electric actuator with or without a return spring (applying or
withdrawal the voltage). The actuator does not have a thermoelectric release. The work of the actuator
is imitated by the system of building fire protection system.
It is possible to check manually the correct functioning of a fire damper with electric actuator for service purposes.
To do this, use a special hex key which should be placed in the socket marked on the actuator. Then, by rotating the
hex key, the fire damper’s partition may be set in the desired position. Bearing in mind to take enough care, rotate
the hex key uniformly and slowly. Too fast and violent rotation may cause damage to the internal mechanism of the
actuator or the power transmission system.
NOTIC
E
Never try to open or close a fire damper’s partition by pulling it directly. Such attempts may cause
damage to the self-locking powertrain of a fire damper and this is not covered by warranty.
It is recommended that the fire damper were opened and closed when the ventilation system is
turned off.
