SCHEDULE TYPE:
PROJECT:
ENGINEER:
CONTRACTOR:
DATE
B SERIES
SUPERSEDES DRAWING NO.
9 - 4 - 13
1200
NEW
DSD-LF
FACTORY MOUNTED DUCT SMOKE DETECTOR
LOW FLOW (100 TO 4000 FPM AIR VELOCITY)
FOR USE WITH 1200 SERIES SMOKE AND COMBINATION
FIRE/SMOKE DAMPERS
MODEL: DSD-LF
Nailor Industries Inc. reserves the right to change any information concerning product or pricing without notice.
Dimensions are in inches (mm).
SAMPLING
TUBE
DSD-LF MOUNTED
EXTERNALLY ON LEFT
HAND SIDE OF DAMPER
SLEEVE STANDARD
EXTERNALLY
MOUNTED
ACTUATOR
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. 29-01-E.
• California State Fire Marshal Listing No. 7272-1653:0207.
• Factory Mutual Approved.
APPLICATION:
Nailor model DSD-LF duct smoke detector (low-flow) can be
utilized with Nailor UL 555S Classified smoke or combination
fire/smoke dampers to detect the presence of smoke within HVAC
ductwork 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 can be factory installed to side of sleeve on
Nailor Model Series 1210, 1260, 1280, 1220 and 1270.
A minimum airflow velocity of 100 fpm (0.5 m /s) is required for
Model DSD-LF.
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-LF
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-LF STANDARD SPECIFICATION:
Model:
System Sensor D4120.
Sensor Type:
Photoelectric.
Dimensions:
(Rectangular) 14.38" (365) Length, 5" (127) Width,
2.5" (64) Depth.
Weight:
2.5 lbs. (1.14 kg.).
Airflow Velocity Range:
100 to 4000 fpm (0.5 to 20.3 m/s).
Operating Temperature Range:
– 4°F to 158°F (– 20°C to 70°C).
Operating Humidity Range:
0% to 95% Relative Humidity
Non-Condensing.
Voltage:
24 VAC / DC or 120 VAC.
NOTES:
1. Smoke detector is factory mounted externally on left side of
sleeve (opposite side of sleeve to the actuator) and will be
mounted horizontally on dampers under 20" (508) in height
and mounted vertically on dampers 20" (508) in height and
over. See orientation details below.
2. 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.
H
H
Height < 20" (508)
Height
≥
20" (508)
