Brochure

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In rooftop units, the damper actuator controls the economizer,
or outside air damper. This application would potentially
require a spring return, and the torque value of that actuator
is going to vary based on the features and the size of the
economizer or damper.
Fire and smoke applications require a spring return actuator
but the cycle time is much faster than a typical spring return
actuator. Fire and smoke actuators also need to be life safety
rated. Torque requirements for fire and smoke applications
vary with the size of the fire/smoke damper.
VAV or variable air volume terminal applications typically
require a lower torque non-spring return actuator.
Application and Installation
Best Practices
Rooftop Units (RTU):
A packaged unit installed on
the roof which contains all air
conditioning components.
Fire and Smoke applications:
A device installed within an HVAC
system, that closes automatically
upon the detection of heat in
accordance with UL standard
555 and 555S.
Variable Air Volume (VAV):
Type of heating, ventilating,
and/or air-conditioning system
which supply a variable airflow
at a constant temperature.
This guide covers installation best practices
for Roof Top Units (RTU), Fire and Smoke and
Variable Air Volume (VAV) applications.