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Application
The RRL/OCI option performs the function of resettable
link and also open or close blade indicator. The RRL option
replaces the fusible link on a combination fire smoke
damper with an electric sensor (thermostat). The sensor
has a fixed temperature setting (165°F, 212°F, 250°F or
350°F [74°C, 100°C, 121°C, 177°C]) and performs the same
function as the fusible link that it replaces. The sensor
interrupts power to the actuator and the actuator’s spring
return mechanism causes the damper to close. The sensor
can be reset after the temperature has cooled down below
the sensor set point.
Before resetting any sensor, a careful inspection of the
damper and sensor should be made as exposure to actual
fire conditions may render these devices unusable.
Second, the OCI assembly contains a single pole, double
throw switch used to indicate damper blade position. The
switch provides a positive open or closed signal when used
in conjunction with remote indicator lights (furnished by
others). OCI assemblies are used in active smoke control
applications to positively indicate the status of all smoke
and combination fire smoke dampers in the building. This
single pole/single throw switch assembly may also be
used to provide a start/stop control circuit for remote fan
installations.
RRL/OCI Option
Resettable Link Option with Blade Indicator for
Combination Fire Smoke Dampers
To meet UL requirements, factory installation of the damper
actuator and factory wiring of the electric sensor is required.
If the damper is equipped with a pneumatic actuator, an EP
switch is required with an appropriate electric power circuit,
to allow the electric thermostat to control the pneumatic
actuator.
Copyright ©2008 Greenheck Fan Corporation
RRL/OCI Option Rev. 3 Dec 2008
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