Specification Sheet
Table Of Contents
303
LIFTING
LUGS
This damper has a anged frame and is designed to t the inside anges of the optional wall housing or
wall mounting collar. The frame and blades are constructed of galvanized steel and are rated to 3000 FPM
with proper clearance as provided by all factory accessories. The damper body recesses into the opening
for a ush appearance.
This damper can greatly reduce the inltration of outside air and although not completely watertight, will
provide weather protection in an economical fashion. Constructed with a galvanized frame and aluminum
blades this damper is rated to 2000 FPM with the proper clearance as provided by all factory accessories.
The damper body is recessed into the opening for a ush appearance.
The motorized option improves weather protection by providing a tighter closure seal and is recommended
for all supply applications. Standard duty dampers are constructed with galvanized frames and aluminum
blades and are rated to 2000 FPM. The damper body is not recessed providing extra clearance between
the fan and damper blades.
The motorized option improves weather protection by providing a tighter closure seal and is recommended
for all supply applications. Heavy-duty dampers are constructed with galvanized frames and blades and
are rated to 3000 FPM. The damper body is not recessed providing extra clearance between the fan and
damper blades.
The anged frame damper is designed to recess inside the anges of the optional wall housing or wall
mounting collar. The center pivot style damper provides superior weather resistance. Galvanized (optional
aluminum) construction is rated to 3500 FPM with proper clearance as provided by all factory accessories.
ACCESSORIES & OPTIONS
FOR MOUNTING ARRANGEMENTS Cont.
Damper Types (Shutters)
Electric Damper Operators
Electric damper operators provide more positive open and closed damper positions which helps increase weather resistance.
Power open - spring close (POSC) motor and linkage kits are eld installed (except for center pivot style) and are available
in 24, 120/240, or 460 volts (single phase) and require approximately 0.5 amps at 120/1/60 power supply. Transformers are
available for voltage reduction. For fan motors 5HP and larger, we recommend a factory tilt switch or "delay-on" timer in the
control circuit (by others) to allow the damper to open prior to allowing fan operation, which will protect the damper blades
and fan from damage when the fan is rst energized.
Heavy-Duty Galvanized Exhaust Motorized Shutter
Standard Duty Aluminum Exhaust Gravity Shutter
Heavy-Duty Galvanized Supply Motorized Shutter
Standard Duty Aluminum Supply Motorized Shutter
Center Pivot Motorized Damper - Supply or Exhaust
MODELS LCE/LCS, L2E/L2S, L3E/L3S
BELT DRIVE SIDEWALL PROPELLER FANS