mcr FID B
single-plane fire dampers
“MERCOR” SA
– The company reserves the right to modify and change the document. Version FID B 21.07.30.02
19/22
Connection diagram for transformer module type MP230/24
Caution! - The location of the limit switches is shown for the fire damper in the safety position
For proper operation of a device equipped with electrical actuators, it is recommended that the rated
voltage housed tolerance of 24V±2% or 230V±2%. Power supply devices other than listed above may
cause malfunction and will not be covered by the warranty conditions.
RST trigger control gear
In the RST version the limit switches are independent units installed inside the fire damper casing. The
fusible release is located on the damper isolation partition. The driving spring is installed on the damper
isolation partition.
Installation of the RST fusible release:
Move partition to the open position
Install the fusible link on the hooks attached to the fire damper casing and the isolation partition
Tighten the nut to lock the hook on the fire damper casing
Independent limit switches – RST version
WK1 – single switch – indicates that the fire damper is closed.
WK2 – tandem of switches – indicates that the fire damper is closed or open.
Switch technical specifications
WK1 and WK2 limit switch
1xNO/1xNC SPDT (switching contact) 5A, 230V
AC
Limit switch operating temperature
-25 ...+85°C
Body
Plastic
Moving hook with nut
Fusible link
Fixed hook on the
isolation partition
Damper isolation partition
Caution
The drawing is indicative only
and applies both to the
rectangular and circular form
versions.
