All Metric dimensions ( ) are soft conversion. © Copyright E.H. Price Limited 2006.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
In today’s life safety products markets,
many building codes require fire dampers,
smoke dampers and combination fire and
smoke dampers to be inspected for proper
operation. Many of these codes require
that the damper be inspected and cycled
every 6 months to a year depending on the
local authority and the type of system in
which it is installed. Usually fire dampers
and combination fire and smoke dampers
are supplied with a fusible link.The fusible
link is a one time device and is generally
limited to 165°F or 212°F. Once the link has
experienced these elevated temperatures, it
can no longer be used and must be replaced
with an identical link. Locating and acquiring
FSD DAMPER STO/R OPERATION
Switch is in Normal (Damper Open) Position:
Damper motor is energized until thermostat
senses temperature above initial closure
rating. Above temperature closure rating,
the damper motor is de-energized and
damper closes.
Smoke Detector (if used) wired in series with
temperature sensitive device.
Switch in Closed Position damper motor is
de-energized and damper is closed.
Detailed wiring diagrams including termi-
nal designation and/or wire color coding
furnished with each shipment.
Indicator Switch Electrical
Limitations
Installation:
• 10 Amperes, 1/4 HP, 120 or 240 Volts
A.C.
• .5 Ampere, 125 Volts D.C.
• .25 Ampere, 250 Volts D.C.
• 5 Amperes, 120 Volts (Lamp Load)
• 15 Amperes, 24 Volts D.C.
STO/R Package - Single Thermostat Operator Release
the identical fusible link can be troublesome
and time consuming. PRICE’s STO/R option
provides the ease of operating and resetting
the damper in a matter of seconds without
replacing the link. The is used in lieu of a
conventional fusible link. It is a reusable/
resettable heat responsive device that can
only be reset after a visual inspection of the
damper. Dampers which allow remote
resetting of the damper from a remote
location are dangerous. A remotely reset
damper may not be fully functional and
should be visually inspected. The STO/R is
reset from the outside of the damper sleeve,
therefore requiring a visual inspection of
the damper. By depressing a button on the
outside of the sleeve an inspector can verify if
the damper is fully operational.The STO/R is
a multi-use heat responsive device. It is wired
in series with the smoke detector therefore
it is user friendly in most applications.When
the smoke detector interrupts the current to
the damper, the STO/R will not hinder the
closing of the damper. The STO/R package
includes blade indicator switches which al-
low for remote notification of damper blade
position, as a standard feature.
The STO/R option is available on all PRICE
Model FSD Combination Fire/Smoke Damp-
ers and Motorized Multi-Blade Fire Dampers.
Manufacturer’s Recommendations
All moving parts of the damper must be
inspected and cycled at intervals not greater
than every six months and in accordance
with the latest edition of NFPA 90A, 92A,
local codes and the actuator manufacturer.
In addition, fuse links shall be removed and
inspected for corrosion. Dry lubricants are
recommended.
Single Thermostat Operator Release (STO/R)
for Fire/Smoke Dampers &
Motorized Multiblade Fire Dampers
Jul / 06 245082 SHEET 1 OF 4
