System Sensor 3251 Intelligent - Manual

D200-57-00 1 I56-749-05
Specifications
Operating Voltage Range:
15 to 28 VDC
Max. Standby Current: 350
µ
A @ 24 VDC (no communication)
Heat Sensor: 135
°
F Fixed Temperature Electronic Thermistor
Operating Humidity Range: 10% to 93% Relative Humidity, noncondensing
Operating Temperature Range: 0
°
to 38
°
C (32
°
to 100
°
F)
Height: 1.7 inches (43mm) installed in B210LP base
Diameter: 6.1 inches (155mm) installed in B210LP base
4.1 inches (104mm) installed in B501 base
Weight: 3.6 oz. (102 g)
3251 Intelligent Ionization, Photoelectronic,
and Fixed Temperature (135
°
F) Thermal
Smoke Sensor
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
Before Installing
This sensor must be installed in compliance with the control panel system
installation manual. The installation must meet the requirements of the
Authority Having Jurisdiction (AHJ). Sensors offer maximum performance
when installed in compliance with the National Fire Protection Associa-
tion (NFPA); see NFPA 72. Please read System Sensor’s Guide for Proper
Use of System Smoke Detectors (I56-407), available at no charge from Sys-
tem Sensor. This manual includes detailed information on sensor spacing,
placement, zoning, and special applications.
NOTICE: This manual should be left with the owner/user of this equip-
ment.
IMPORTANT: This detector must be tested and maintained regularly fol-
lowing NFPA 72 requirements. The detector should be cleaned at least
once a year.
General Description
The Model 3251 intelligent smoke detector is a microprocessor-based sen-
sor, which uses a combination of ionization, photoelectric, and fixed tem-
perature (135
°
F) thermal sensors to detect a wider range of fires than the
standard single sensor smoke detector. Rotary decade switches are pro-
vided for setting the sensor address (see figure 2). This sensor is designed
to provide open area protection and is intended for use with compatible
control panels only.
The sensor is provided with two bicolor LED’s which indicate sensor sta-
tus. Flashing green indicates normal operation and steady red indicates
alarm. Remote LED annunciator capability is also available as an optional
accessory (Model RA400Z).
Spacing
System Sensor recommends spacing sensors in compliance with NFPA 72.
In low air flow applications with smooth ceilings, space sensors 30 feet
apart. For specific information regarding sensor spacing, placement, and
special applications, refer to NFPA 72 or System Sensor’s Guide For Proper
Use of System Smoke Detectors.
Wiring Instructions
All wiring must be installed in compliance with the National Electric Code
(NEC), applicable local codes, and any special requirements of the Au-
thority Having Jurisdiction (AHJ). Proper wire gauges should be used.
The installation wires should be color-coded to limit wiring mistakes and
ease system troubleshooting.
Improper connections will prevent a system from responding properly in
the event of a fire.
Remove power from the communcation line before installing sensors.
1. Wire the sensor base (supplied separately) per the wiring diagram (see
figure 1).
2. Set the desired address on the sensor address switches (see figure 2).
3. Install the sensor in the sensor base. Push the sensor into the base
while turning it clockwise to secure it in place.
4. After all sensors have been installed, apply power to the control unit
and activate the communication line.
5. Test the sensor(s) as described in the TESTING section of this manual.
CAUTION
Dust covers provide limited protection against airborne dust particles dur-
ing shipment. Dust covers must be removed before the sensors can sense
smoke. Remove sensors prior to heavy remodeling or construction.
Testing
Before testing, notify the proper authorities that the system is undergoing
maintenance and will be temporarily out of service. Also, disable the sys-
tem to prevent unwanted alarms. All sensors must be tested after installa-
tion and periodically thereafter. Testing methods must satisfy the
Authority Having Jurisdiction (AHJ). Sensors offer maximum performance
when tested and maintained in compliance with NFPA 72.
The sensor can be tested in the following ways:
A. Functional Magnet Test (Model M02-04-01)
This sensor can be functionally tested using a test magnet. The test
magnet electronically simulates smoke in the sensing chamber, testing
the sensor electronics and connections to the control panel.
1. Hold the test magnet in the magnet test area as shown (see figure 3).
2. The sensor should alarm the panel.
Two LED’s on the sensor are controlled by the panel to indicate
sensor status. Refer to the control panel technical documentation
for sensor LED status operation and expected delay to alarm.
B. Sensitivity Test
The sensor contains an internal test which continually checks the sen-
sitivity of the sensor. If the sensor moves out of its intended sensitivity
range, the sensor will transmit a trouble signal to the control panel.
C. Smoke Entry: Aerosol Generator (Gemini 501)
The GEMINI model 501 aerosol generator can be used for smoke entry
testing. Set the generator to represent 4%/ft. to 5%/ft. obscuration as
described in the GEMINI 501 manual. Using the bowl shaped applica-
tor, apply aerosol until the panel alarms.
3 2
1
3 2
1
+
–
–
+
UL LISTED COMPATIBLE
CONTROL PANEL
OPTIONAL RETURN LOOP
REMOTE ANNUNCIATOR
+ –
4 5
6 3
7
8
2
1
9 0
4 5
6 3
7
8
2
1
9 0
Figure 2. Rotary decade address switch:
A78-2461-00
Figure 1. Wiring diagram:
A78-2460-00