2 1/4" (57)
DAMPER
DSD-NF
SLEEVE LENGTH
4" x 4" (102 x 102) JUNCTION BOX ON TOP OF
SLEEVE WHEN ACTUATOR IS EXTERNAL MOUNT
(INTERNAL JUNCTION BOX WHEN ACTUATOR IS
INTERNAL MOUNT)
OPTIONAL
SIDE MOUNTING
SCHEDULE TYPE:
PROJECT:
ENGINEER:
CONTRACTOR:
DATE
B SERIES
SUPERSEDES DRAWING NO.
9 - 4 - 13
1200
1 - 5 - 09
DSD-NF
FACTORY MOUNTED DUCT SMOKE DETECTOR
NO FLOW (0 TO 3000 FPM AIR VELOCITY)
FOR USE WITH 1200 SERIES SMOKE AND COMBINATION
FIRE/SMOKE DAMPERS
MODEL: DSD-NF
Nailor Industries Inc. reserves the right to change any information concerning product or pricing without notice.
Dimensions are in inches (mm).
QUALIFICATIONS:
The following qualifications apply to the smoke detector
only. There is no separate UL product category for factory-
mounted detector/damper combination. Refer to individual
damper specification drawing for damper qualifications.
Consult the local authority having jurisdiction before
installation to ensure local code compliance.
• UL 268A Listed Smoke-automatic Detectors, Category
UROX (File # S911).
• Meets the requirements of NFPA 72, 90A, 92 and 101.
• City of New York. MEA No. 205-94-E.
• California State Fire Marshal Listing No. 7272-1653:0122.
• Factory Mutual Approved.
APPLICATION:
Nailor model DSD-NF duct smoke detector (no-flow) can be utilized
with Nailor UL 555S Classified smoke or combination fire/smoke
dampers to detect the presence of smoke within HVAC ductwork,
whether or not there is airflow and close the damper to prevent the
smoke from spreading. As most fatalities resulting from fires can be
attributed to the effects of toxic smoke, detecting and controlling the
smoke from spreading within the HVAC system is vital to preventing
injury as well as limiting property damage, including damage to the
HVAC system itself. Refer to NFPA Standards 72, 90A and 92 to
determine when and where duct smoke detectors are required.
The DSD-NF detector features a low-profile design for optimum
pressure drop and will operate with airflow in either direction. It can
be factory installed to top of sleeve (side mounting optional) on
Nailor Model Series 1210, 1260, 1280, 1220 and 1270.
OPERATION:
Upon detection of smoke, the smoke detector causes the damper
to close by cutting off power to the actuator. The actuator return
spring forces the damper closed. The detector can be reset only by
a momentary power interuption. The standard model DSD-NF
detector and smoke damper combination is designed simply to
close the damper upon detection of smoke. For applications
requiring the detector to be wired into a firefighters' smoke-control
station (FSCS), contact Nailor.
DSD-NF STANDARD SPECIFICATION:
Model:
System Sensor 2151 Low-Profile.
Sensor Type:
Photoelectric.
Dimensions:
6.1" (155) dia. flanged base.
Weight:
3.6 oz. (104 g.).
Airflow Velocity Range:
0 to 3000 fpm (0 to 15.24 m/s).
Operating Temperature Range:
32°F to 120°F (0°C to 49°C).
Operating Humidity Range:
10% to 93% Relative Humidity
Non-Condensing.
Voltage:
120 VAC or 24 VAC / DC.
Latching Arm:
Reset by momentary power interuption.
Contact Nailor for minimum damper size and sleeve length
for your specific application.
NOTES:
1. Factory mounted smoke detectors will be factory wired to
actuator(s) (or E.P. switch) and heat sensor(s), as applicable,
into a 4" x 4" (102 x 102) common junction box in order to
provide a single point wiring connection in the field.
CCW
TO
OPEN
AIRFLOW
0 to 3000 FPM
DUCT HEIGHT
OPTIONAL SIDE MOUNTING
DUCT W
IDTH
