Pittway System Sensor 1251 User manual

D200-51-00 1 I56-548-06
1251 Plug-in Intelligent Ionization
Sensor with Communications
INSTALLATION AND MAINTENANCE INSTRUCTIONS
A Division of Pittway
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: [phone]
Before Installing
Please read the system wiring and installation manual, I56-
407. This manual includes detailed information on sensor
spacing, placement, zoning, and special applications. Cop-
ies of this manual are available from System Sensor.
General Description
The Model 1251 intelligent ionization sensor uses a state-
of-the-art sensing chamber. This sensor is designed to pro-
vide open area protection and is intended for use with
compatible control panels only.
Two LEDs on each sensor light to provide a local, visible
sensor indication. The LEDs can be latched on by code
command from the control panel for an alarm indication.
The LEDs can also be unlatched to the normal condition by
code command. Remote LED annunciator capability is also
available as an optional accessory (RA400Z).
Specifications
Operating Voltage Range: 15 to 32 VDC
Max. Avg. Standby Current: 300µA@ 24 VDC (one communication every 5 sec. with LED blink enabled)
Max. Alarm Current (LED on): 6.5 mA @ 24 VDC
Operating Humidity Range: 10% to 93% Relative Humidity, noncondensing
Operating Temperature Range: 0° to 49°C (32° to 120°F)
Height: 1.7 inches (43 mm) installed in B210LP Base
Diameter: 6.2 inches (155 mm) installed in B210LP Base
4.1 inches (104 mm) installed in B501 Base
Weight: 3.6 oz. (102 g)
Wiring Guide
Refer to the installation instructions for the plug-in base be-
ing used. As indicated in Figure 1, terminals for power,
ground, and the optional RA400Z Remote Annunciator are
included in the base. Base Models B210LP (shown in Figure
1) and B501 are electrically identical.
NOTE: All wiring must conform to all applicable codes,
ordinances, and regulations.
NOTE: Verify that all sensor bases are installed and that
polarity of the wiring is correct at each base.
Disconnect loop power before installing sensors.
1. Sensor Installation
a. Set the sensor to the desired address and record that
address on the label attached to the base.
b. Insert the sensor into the base and rotate it clockwise
until it drops into place.
c. Continue to rotate the sensor until it locks into the
base.
Dust covers are an effective way to limit the entry of dust
into smoke detector sensing chambers. However, they may
not completely prevent airborne dust particles from enter-
ing the detector. Therefore, System Sensor recommends the
removal of detectors before beginning construction or other
dust producing activity.
Be sure to remove dust covers from any sensors that were
left in place during construction as part of returning the
system to service.
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D200-51-00 2 I56-548-06
Figure 1:
2. Tamper-Resistance
Model 1251 includes a tamper-resistant capability that
prevents its removal from the bracket without the use of
a tool. Refer to the base manual for details on making
use of this capability.
3. After all sensors have been installed, apply power to the
system.
4. See Figure 2. Test the sensor by positioning a test mag-
net (M02-24) against the sensor plastic just to the left of
LED1. The alarm level should be recognized at the panel
and the LED controlled by communication command
from the panel.
5. Reset the sensor by communication command from the
panel.
Testing
Detectors must be tested after installation and following
periodic maintenance. However, before testing, notify the
proper authorities that the smoke detector system is under-
going maintenance and the system will be temporarily out
of service. Disable the zone or system undergoing mainte-
nance to prevent unwanted alarms.
In addition, check to ensure that the LEDs blink. If they do
not, power has been lost to the detector (check the wiring),
or it is defective (return it for repair).
Test the sensors as follows:
A. Test Magnet (Model M02-24 -optional)
1. Test the sensor by positioning the optional test mag-
net against the sensor plastic just to the left of LED1,
as shown in Figure 2.
2. Both LEDs should latch on within 30 seconds, indicat-
ing an alarm and annunciating the panel.
B. Calibrated Sensitivity Test (MOD400R)
Use the MOD400R Test Module with a digital or analog
voltmeter to test calibrated detector sensitivity as de-
scribed in the test module manual.
C. Aerosol Generator in accordance with NFPA 72.
The Gemini Model 501 aerosol generator can be used to
test the sensor. Set the generator to represent 4%/ft to
5%/ft obscuration, following the instructions in the gen-
erator manual. Use a bowl shaped applicator to apply
aerosol to the sensor. It should alarm after 30 seconds.
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D200-51-00 3 I56-548-06
Figure 2. Test Magnet positioning:
Figure 3: Cleaning Before cleaning, notify the proper authorities that the sys-
tem is undergoing maintenance and will be temporarily out
of service. Disable the system to prevent unwanted alarms.
1. Remove the sensor to be cleaned from the system.
2. Remove the sensor cover. Use a small standard screw-
driver to release each of the four cover removal tabs that
hold the cover in place.
3. Vacuum the outside of the screen carefully without re-
moving it.
4. Remove the sensor screen. Pull the screen straight away
from the sensing chamber until it snaps out of place. Re-
placement screens are available.
5. Use a vacuum cleaner or clean, compressed air to re-
move dust and debris from the sensing chamber.
6. Reinstall or replace the sensing chamber screen by plac-
ing it over the sensing chamber. Rotate the screen until it
snaps into place.
7. Reinstall the sensor cover. Use the test module socket
and LEDs to align the cover with the sensor. Snap the
cover into place.
8. When all sensors have been cleaned, restore power to
the system and test the sensor(s) as described in the
TESTING section of this manual.
A78-2463-07
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D200-51-00 4 I56-548-06
Three-Year Limited Warranty
System Sensor warrants its enclosed smoke detector to be free from de-
fects in materials and workmanship under normal use and service for a
period of three years from date of manufacture. System Sensor makes no
other express warranty for this smoke detector. No agent, representative,
dealer, or employee of the Company has the authority to increase or alter
the obligations or limitations of this Warranty. The Company’s obligation
of this Warranty shall be limited to the repair or replacement of any part of
the smoke detector which is found to be defective in materials or work-
manship under normal use and service during the three year period com-
mencing with the date of manufacture. After phoning System Sensor’s toll
free number 800-SENSOR2 (736-7672) for a Return Authorization number,
send defective units postage prepaid to: System Sensor, Repair Depart-
ment, RA #__________, 3825 Ohio Avenue, St. Charles, IL 60174. Please
include a note describing the malfunction and suspected cause of failure.
The Company shall not be obligated to repair or replace units which are
found to be defective because of damage, unreasonable use, modifica-
tions, or alterations occurring after the date of manufacture. In no case
shall the Company be liable for any consequential or incidental damages
for breach of this or any other Warranty, expressed or implied whatsoever,
even if the loss or damage is caused by the Company’s negligence or fault.
Some states do not allow the exclusion or limitation of incidental or conse-
quential damages, so the above limitation or exclusion may not apply to
you. This Warranty gives you specific legal rights, and you may also have
other rights which vary from state to state.
This smoke detector is designed to activate and initiate emergency ac-
tion, but will do so only when it is used in conjunction with an authorized
fire alarm system. This detector must be installed in accordance with
NFPA standard 72.
Smoke detectors will not work without power. AC or DC powered
smoke detectors will not work if the power supply is cut off.
Smoke detectors will not sense fires which start where smoke does not
reach the detectors. Smoldering fires typically do not generate a lot of
heat which is needed to drive the smoke up to the ceiling where the
smoke detector is usually located. For this reason, there may be large de-
lays in detecting a smoldering fire with either an ionization type detector
or a photoelectric type detector. Either one of them may alarm only after
flaming has initiated which will generate the heat needed to drive the
smoke to the ceiling.
Smoke from fires in chimneys, in walls, on roofs or on the other side of a
closed door(s) may not reach the smoke detector and alarm it. A detector
cannot detect a fire developing on another level of a building quickly or at
all. For these reasons, detectors shall be located on every level and in
every bedroom within a building.
Smoke detectors have sensing limitations, too. Ionization detectors and
photoelectric detectors are required to pass fire tests of the flaming and
smoldering type. This is to ensure that both can detect a wide range of
types of fires. Ionization detectors offer a broad range of fire sensing capa-
bility but they are somewhat better at detecting fast flaming fires than
slow smoldering fires. Photoelectric detectors sense smoldering fires better
than flaming fires which have little, if any, visible smoke. Because fires de-
velop in different ways and are often unpredictable in their growth, nei-
ther type of detector is always best, and a given detector may not always
provide early warning of a specific type of fire.
In general, detectors cannot be expected to provide warnings for fires re-
sulting from inadequate fire protection practices, violent explosions, es-
caping gases which ignite, improper storage of flammable liquids like
cleaning solvents which ignite, other similar safety hazards, arson, smok-
ing in bed, children playing with matches or lighters, etc. Smoke detectors
used in high air velocity conditions may have a delay in alarm due to dilu-
tion of smoke densities created by frequent and rapid air exchanges. Addi-
tionally, high air velocity environments may create increased dust
contamination, demanding more frequent maintenance.
Smoke detectors cannot last forever. Smoke detectors contain electronic
parts. Even though smoke detectors are made to last over 10 years, any
part can fail at any time. Therefore, smoke detectors shall be replaced after
being in service for 10 years. The smoke detector system that this detector
is used in must be tested regularly per NFPA 72. This smoke detector
should be cleaned regularly per NFPA 72 or at least once a year.
The Limitations of Property Protection Smoke Detectors
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