SS-300-021
1 I56-3538-003R
DNRE Duct Smoke Detector
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Table of Contents
Page
[1] Limitations of Duct Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . .1
[2] General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
[3] Contents of the Duct Smoke Detector Kit . . . . . . . . . . . . . . . . . . . . . .1
[4] Detector Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
[5] Sampling Tube Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
[6] Measurement Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
[7] Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
[8] Verification of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
[9] Dectector Cleaning Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
[10] Sensor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
[11] Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Warranty
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
BEfORE INSTALLINg
Read the System Sensor Guide for
Proper Use of Smoke Detectors in Duct Appli-
cations
(A05-1004), which provides detailed information on detector spacing,
placement, zoning, wiring, and special applications . Copies of this manual are
available online at www .systemsensor .com . Reference must be made to local
fire regulations .
NOTICE: This manual shall be left with the owner/user of this equipment .
IMPORTANT: This detector must be tested and maintained regularly . The
detector must be tested an maintained regularly following NFPA 72 require-
ments . According to NFPA, the detector should be visually inspected semian-
nually and functionally tested at least once a year . This may need to be more
frequent depending on the air quality of the duct supply air .
[1]LIMITATIONS Of DUCT SMOkE DETECTORS
WARNING
DUCT DETECTORS MUST NOT BE USED AS A SUBSTITUTE FOR OPEN AREA
DETECTOR PROTECTION as a means of providing life safety . Nor are they a
substitute for early warning in a building’s regular fire detection system .
This device will not operate without electrical power . Fire situations may
cause an interruption of power . The system safeguards should be discussed
with your local fire protection specialist .
This device will not sense smoke unless the ventilation system is operating
and the cover is installed .
For this detector to function properly, it MUST be installed according to the
instructions in this manual . Furthermore, the detector MUST be operated within
ALL electrical and environmental specifications listed in this manual and the
sensor head installation manual . Failure to comply with these requirements may
prevent the detector from activating when smoke is present in the air duct .
[2]gENERAL DESCRIPTION
Smoke introduced into this air duct system will be distributed throughout the
entire building . Smoke detectors designed for use in air duct systems are used
to sense the presence of smoke in the duct .
Model DNRE Air Duct Smoke Detector utilizes photoelectric technology for
the detection of smoke . This detection method, when combined with an ef-
ficient housing design, samples air passing through the duct and allows detec-
tion of a developing hazardous condition . When sufficient smoke is sensed,
an alarm signal is initiated at the fire control panel monitoring the detector,
and appropriate action can be taken to shut off fans, blowers, change over air
handling systems, etc . These actions can facilitate the management of toxic
smoke and fire gases throughout the areas served by the duct system .
The DNRE incorporates a sensor cover tamper feature that provides a trou-
ble signal at the panel immediately if the cover is removed or improperly in-
stalled . Proper installation of the sensor cover removes the trouble condition .
When programmed with the system control panel, two LEDs on each duct
smoke detector light to provide local visible indication .
The DNRE provides a remote alarm output for use with auxiliary devices, such
as the RA400Z/RA100Z remote LED annunciator, as well as remote test capabil-
ity with the RTS451/RTS151 or RTS451KEY/RTS151KEY Remote Test Stations .
[2.1] DETECTOR fEATURE SET
– Utilizes plug-in head
– Sampling tubes install from front and rear
– Compatible with existing accessories
– Able to address detector per code switches on sensor head .
[3]CONTENTS Of ThE DUCT SMOkE DETECTOR kIT
1 . Sensor/power side and covers (use appropriate sensor per the system
control panel)
2 . Three #10 sheet metal screws for mounting
3 . One test magnet
4 . Drilling template
5 . One sampling tube end cap
6 . One plastic exhaust tube
NOTE: A DST sampling tube must be ordered to complete the installation . It
must be the correct length for the width of the duct where it will be installed . See
Table 1 on page 3 to determine the inlet tube required for different duct widths .
[4]DETECTOR INSTALLATION
[4.1]VERIfy DUCT AIR fLOw DIRECTION AND VELOCITy
Model DNRE detectors are designed to be used in air handling systems hav-
ing air velocities of 1 .5 to 20 .3 m/sec per minute . Duct widths from 15 .3 to
30 .5 cm can be accommodated . Be sure to check engineering specifications to
ensure that the air velocity in the duct falls within these parameters . If neces-
sary, use a velocity meter (anemometer) to check the air velocity in the duct .
I56-3538-00
3R
SPECIfICATIONS
Operating Temperature:
–20° to 60° C
Storage Temperature:
–30° to 60° C
Humidity:
0% to 93% Relative Humidity Non-condensing
Air Velocity:
1 .5 to 20 .3 m/sec .
Rectangular Footprint Dimensions:
37 cm L × 12 .7 cm W × 6 .36 cm D
Square Footprint Dimensions:
19 .7 cm L × 22 .9 cm W × 6 .35 cm D
Weight:
0 .73 kg
Electrical (See applicable detector head installation manual for electrical specifications . Use the Base/Sensor Cross Reference chart at http:\\www .systemsensor .com
to determine applicable sensor head .)
ACCESSORY CURRENT LOADS AT 24 VDC
DEVICE
STANDBY
ALARM
RA400Z/RA100Z
0mA
12mA Max.
RTS451/RTS151
0mA
12mA Max.
RTS451KEY/RTS151KEY
12mA
12mA Max.
6500RTS-KEY
12mA
12mA Max.
Pittway Tecnologica Srl,
Via Caboto 19/3, 34147 Trieste, Italy
www .systemsensoreurope .com