System Sensor DNRW - Manual

SS-300-018 1 I56-3371-007R
DNRW Duct Smoke Detector
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com
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. NFPA Standards 72 and 90A
should also be referenced for detailed information.
NOTICE: This manual shall be left with the owner/user of this equipment.
IMPORTANT: This detector must be tested and maintained regularly following
NFPA 72 requirements. The detector should be cleaned at least once a year.
[1]LIMITATIONS Of DUCT SMOkE DETECTORS
WARNING
The National Fire Protection Association has established that DUCT DETEC-
TORS 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.
System Sensor supports this position and strongly recommends that the user
read NFPA Standards 90A, 72, and 101. The DNRW Air Duct Smoke Detectors
are listed per UL 268A.
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 DNRW Air Duct Smoke Detector utilizes photoelectric technology
for the detection of smoke. This detection method, when combined with an
efficient housing design, samples air passing through the duct and allows
detection 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 DNRW incorporates a sensor cover tamper feature that provides a trouble
signal at the panel immediately if the cover is removed or improperly installed.
Proper installation of the sensor cover removes the trouble condition.
If programmed with the system control panel, two LEDs on each duct smoke
detector light to provide local visible indication.
The DNRW 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 board assembly and covers (use appropriate sensor per
the system control panel)
2. Three #10 sheet metal screws for mounting
3. Drilling template
4. One sampling tube end cap
5. One plastic exhaust tube
NOTE: A 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 DNRW detectors are designed to be used in air handling systems
having air velocities of 100 to 4000 feet per minute. Duct widths from 6 inches
to 12 feet 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.
I56-337
1-00
7R
SPECIfICATIONS
Operating Temperature:
–4° to 158° F (–20° to 70° C);
32° F to 120° F (0° C to 49° C) with module installed in the DNRW
Storage Temperature: –22° to 158° F (–30° to 70° C)
Environmental Rating: NEMA 4* Type 4 Enclosure — Watertight
Humidity: 0% to 93% Relative Humidity Non-condensing
Air Velocity: 100 to 4000 ft./min. (0.5 to 20.3 m/sec.)
Rectangular Footprint Dimensions: 14.38 in L x 5 in W x 2.5 in D (37 cm L x 12.7 cm W x 6.36 cm D)
Square Footprint Dimensions: 7.75 in L x 9 in W x 2.5 in D (19.7 cm L x 22.9 cm W x 6.35 cm D)
Weight: 1.6 pounds; 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
0mA 12mA Max.