model sto/r (single thermostat operator release) - NCA Manufacturing

MODEL STO/R
(SINGLE THERMOSTAT OPERATOR RELEASE)
FOR COMBINATION FIRE / SMOKE DAMPERS AND
MOTORIZED MULTI-BLADE FIRE DAMPERS
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 12 months to 4 years 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 indentical link. Locating and acquiring the indentical
fusible link can be troublesome and time consuming. NCA Manufacturing’s STO/R option provides
the ease of operating and resetting the damper in a matter of seconds without replacing the link. The
EFL 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 heat response device 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 and inspector can verify if the damper is fully
operational. The ELF is a multi-use heat responsive device. It is wired in series with the GND actuator therefore it is user friendly in most
applications. When the smoke detector interrupts the current to the damper, the ELF will not hinder the closing of the damper. The STO/R
package includes blade indicator switches which allow for remote notification of damper blade position, as a standard feature.
The STO/R option is available on all NCA Manufacturing FSD Model Combination Fire/Smoke Dampers and Motorized Multi-Blade Fire Dampers,
refer to pages 3 and 4 for the Siemens GND Series actuator. The below details do not apply to the GND Series.
Devices to Left of dashed line are located
Devices to right of dashed line are factory
remotely from damper - furnished by others.
mounted on damper.
Field wiring terminates at splice points
indicated by " "
120 or 24 volt ac damper actuator power
L1
L2
LISTING
STATE OF CALIFORNIA
STATE
FIRE
S E R V
M A R S H A L L
IC E
LISTED AND LABELLED BY:
DESIGNED AND TESTED IN ACCORDANCE WITH
UL-555 AND ULC-S112. MEETS ALL NFPA-90A
REQUIREMENTS FOR FIRE DAMPERS.
Electric damper actuator (power on opens
damper, power off closes damper).
X
Blue
STO/R - 05-08 (STOR)
L1
CLOSED
Normal (DAMPER OPEN)
Open/closed auto switching
Any supply voltage
compatible with
lights & switches
L2
Damper open
indicator light
Damper closed
indicator light
Orange
Smoke Detector
(If Used)
ELF Temperature sensing device
(Opens when temperature exceeds
closure rating)
Smoke Detector may be field or factory supplied.
Yellow
Yellow
Red
Red
Position indicator switch
(closes when damper is open)
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 terminal designation and/or wire color coding
furnished with each shipment.
Position indicator switch
(closes when damper is closed)
Indicator Switch Electrical Limitations
• 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.
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.
Page 1 of 6
© 2006 NCA Manufacturing
NCA MANUFACTURING, INC. 1036 SOUTH JUPITER ROAD GARLAND, TEXAS 75042 TEL. 972-276-5002 FAX 972-276-6747

MODEL STO/R
(SINGLE THERMOSTAT OPERATOR RELEASE)
FOR COMBINATION FIRE / SMOKE DAMPERS AND
MOTORIZED MULTI-BLADE FIRE DAMPERS
Dampers with Siemens GND Actuators, See page 3 and 4 of this document.
STO/R Wiring Details
L1
Blk.
Remote
Command
Station
Switch Package
Wiring
Compartment
L2
Wht.
Blk.
Control
Panel
Org.
Org.
L
Wire Nut
Blue
Blk.
Motor
Actuator
M1
Wht.
L3
Blk.
Closed
Blk.
Smoke Detector
If Used
TS1
Red
S1
Red
L4
Red Light
Open
Blk.
Blk.
Yellow
Yellow
Green Light
S2
L3, L4 is a Supply Voltage Compatible with Lights and Switches. Standard Voltage is
Same as Actuator Ordered.
STO/R - 02-06 (STOR)
Red
Red
FS Primary
Heat Sensor
Manual Reset
S1
TS1
S2
Yellow
Yellow
Orange
Blue
Page 2 of 6
© 2006 NCA Manufacturing
NCA MANUFACTURING, INC. 1036 SOUTH JUPITER ROAD GARLAND, TEXAS 75042 TEL. 972-276-5002 FAX 972-276-6747

MODEL STO/R w/Siemens GND Series Actuator
(SINGLE THERMOSTAT OPERATOR RELEASE)
FOR COMBINATION FIRE / SMOKE DAMPERS AND
MOTORIZED MULTI-BLADE FIRE DAMPERS
STO/R - 02-06 (STOR)
The Thermostat is wired to the actuator
via a low voltage (24 vac) connection. In
most cases codes does not require this
wiring to be incased. Check with your
local codes to see if low voltage wires
requires conduit.
Supply (X)
Neutral (Y)
Ground
24 vac/vdc 120 vac 230 vac
Red White Brown
Black Black Blue
Green Green Green
Auxiliary Switches
Switch Wire
Makes Color Note: Both sets of auxiliary switch
contacts are open when actuator
Closed 85° Yellow
Ratings:
250 vac - 10 amps
Motor Load - 3 amps
o o
Max. Temperature - 350 F (177 C)
Page 3 of 6
© 2006 NCA Manufacturing
NCA MANUFACTURING, INC. 1036 SOUTH JUPITER ROAD GARLAND, TEXAS 75042 TEL. 972-276-5002 FAX 972-276-6747

MODEL STO/R w/Siemens GND Series Actuator
(SINGLE THERMOSTAT OPERATOR RELEASE)
FOR COMBINATION FIRE / SMOKE DAMPERS AND
MOTORIZED MULTI-BLADE FIRE DAMPERS
STO/R - 02-06 (STOR)
Page 4 of 6
© 2006 NCA Manufacturing
NCA MANUFACTURING, INC. 1036 SOUTH JUPITER ROAD GARLAND, TEXAS 75042 TEL. 972-276-5002 FAX 972-276-6747

MODEL STO/R
(SINGLE THERMOSTAT OPERATOR RELEASE)
FOR COMBINATION FIRE / SMOKE DAMPERS AND
MOTORIZED MULTI-BLADE FIRE DAMPERS
L1
Remote
Command
Station
Control
Panel
Smoke Detector
If Used
L
Blue
Switch Package
Wiring/Piping
Compartment
E-P Switch
L2
TS1
Pneumatic
Actuator
25 Psi
L3
Blk.
Closed
Blk.
Red
S1
Red
P1
L4
Red Light
Open
Blk. Blk.
Yellow
Yellow
Green Light
S2
STO/R - 02-06 (STOR)
L1, L2 is the E-P Switch Supply Voltage
desired (120vac or 24vac). L3, L4 is a
Supply Voltage Compatible with Lights and
Switches. Standard Voltage is 120vac if
not Specified.
Red
Red
S1
S2
Yellow
Yellow
FS Primary
Heat Sensor
Manual Reset
TS1
Orange
Blue
Page 5 of 6
© 2006 NCA Manufacturing
NCA MANUFACTURING, INC. 1036 SOUTH JUPITER ROAD GARLAND, TEXAS 75042 TEL. 972-276-5002 FAX 972-276-6747

MODEL STO/R
(SINGLE THERMOSTAT OPERATOR RELEASE)
FOR COMBINATION FIRE / SMOKE DAMPERS AND
MOTORIZED MULTI-BLADE FIRE DAMPERS
Pneumatic Actuator with a PFV Option
L1
Remote
Command
Station
E-P Switch
Smoke Detector
If Used
Switch Package
Wiring/Piping
Compartment
L2
Pneumatic
Actuator
25 Psi
L3
Blk.
Closed
Blk.
Flow
Restrictor
PFV
Red
S1
Red
P1
L4
Red Light
Open
Blk.
Blk.
Yellow
Yellow
Fusible
Link
Sleeve
Green Light
Air Supply
to Actuator
S2
L3, L4 is a Supply Voltage Compatible
with Lights and Switches. Standard
Voltage is 120vac if not Specified.
STO/R - 02-06 (STOR)
Inside
Duct
Outside
Duct
Flow Restrictor
Incoming
Air Supply
Red
S1
S2
Yellow
Red
Yellow
Page 6 of 6
© 2006 NCA Manufacturing
NCA MANUFACTURING, INC. 1036 SOUTH JUPITER ROAD GARLAND, TEXAS 75042 TEL. 972-276-5002 FAX 972-276-6747