Description
AVAILABLE DAMPER MODELS
- MODEL 5020
FUSIBLE LINK OPERATED AIR/SMOKE/FIRE DAMPER.
This incorporates the standard one time fusible link to respond to a rise in duct temperature. It is re-openable only up to the chosen link disconnect temperature.
- MODEL 5020-1
RE-SETTABLE COMBINATION AIR/SMOKE/FIRE DAMPER WITH McCabe link.
The operation of the actuator open (or closed) resets the temperature link if the duct temperature drops below its set point.
KNEE LOCK ACTION WHEN DAMPER SLAMS SHUT
The knee-Lock Action incorporated in this multiblade damper allows it to perform linear flow control superior to opposed blade dampers.
BRIEF OPERATING DESCRIPTION
- The model 5020-1 combination air/smoke/fire damper incorporates the Re-openable/re-settable bimetallic McCabe link in its operator to sense a rise in duct temperature.
- In an elevated temperature situation the link releases the damper blades & physically disconnects them from the actuator drive shaft, thus disallowing the damper from re-opening in the actual fire zone.
- The damper is fully re-openable and override-able, but only up to the chosen link-disconnect temperature: thus preventing a possible “hung” damper due to actuator failure when temperature exceeds its operational limit.
- The damper mechanically locks in the closed position using a patented knee lock action, then upon return to link reset temperature (controlled fire condition), the “smart link” can be automatically re-engaged for purging by cycling the actuator.
