System Sensor 7351 Installation And Maintenance Instructions

INSTALLATION AND MAINTENANCE INSTRUCTIONS
7351
Intelligent High-sensitivity
Photoelectric Smoke Sensors
SPECIFICATIONS
Operating Voltage Range:
Operating Current @ 24 VDC:
Maximum Alarm Current:
Maximum Current:
Operating Humidity Range:
Operating Temperature Range:
Air Velocity:
Height:
Diameter:
Weight:
Isolator Load Rating:
*Please refer to your isolator base/module manual for isolator calculation instructions.
UL 268 listed for Open Air Protection (0.5%/ft. to 2.0%/ft. obscuration).
UL 268 listed for Special Application (0.02%/ft. to 0.5%/ft. obscuration).
UL 268A listed for Duct Applications (0.5%/ft. to 2.0%/ft. obscuration).
This sensor must be installed in compliance with the control panel system
installation manual. The installation must meet the requirements of the Au-
thority Having Jurisdiction (AHJ). Sensors offer maximum performance
when installed in compliance with the National Fire Protection Associa-
tion (NFPA); see NFPA 72 National Fire Alarm and Signaling Code and/or
NFPA 76 Standard for the Fire Protection of Telecommunications Facilities.
GENERAL DESCRIPTION
Model 7351 is a plug-in type smoke sensor that combines a photoelectronic
sensing chamber with addressable-analog communications providing sensi-
tivities from 0.02% per foot to 2% per foot obscuration for Early Warning Fire
Detection (EWFD) or Very Early Warning Fire Detection (VEWFD).
The sensors transmit an analog representation of smoke density over a com-
munication line to a control panel. Rotary dial switches are provided for set-
ting the sensor's address. (See Figure 1.)
FIGURE 1. ROTARY ADDRESS SWITCHES:
7 8
9
6
5
10
4
3
13
2
14
1 0
15
TENS
Two LEDs on the sensor are controlled by the panel to indicate sensor status.
An output is provided for connection to an optional remote LED annunciator
(P/N RA100Z).
System Sensor panels offer different features sets across different models. As a
result, certain features of the photoelectric sensors may be available on some
control panels, but not on others. 7351 supports CLIP (Classic Loop Interface
Protocol) protocol mode. The possible features available in the photoelectric
sensors, if supported by the control panel are:
1. The sensor's LEDs can operate in three ways—on, off, and blinking–and
they can be set to red, green, or amber. This is controlled by the panel.
2. The remote output may be synchronized to the LED operation or con-
trolled independent of the LEDs.
3. Devices are point addressable up to 159 addresses.
Please refer to the operation manual for the UL listed control panel for specific
operation. The photoelectric sensors require compatible addressable com-
munications to function properly. Connect these sensors to listed-compatible
control panels only.
SPACING
System Sensor recommends spacing sensors in compliance with NFPA 72. In
low air flow applications with smooth ceilings, space sensors 30 feet apart
(9.1 m). For specific information regarding sensor spacing, placement, and
special applications, refer to NFPA 72 or the System Smoke Detector Applica-
tion Guide, available from System Sensor.
15 to 32 VDC
300 uA (one communication every 5 seconds with green LED blink on communication)
2 mA @ 24 VDC (one communication every 5 seconds with red LED solid on)
4.5 mA @ 24 VDC (one communication every 5 seconds with amber LED solid on)
10% to 93% Relative Humidity, Non-condensing
14°F to 140°F (-10°C to 60°C)
0 to 4000 ft./min. (0 to 1219.2 m/min.)
2.0˝ (51 mm) installed in B300-6 Base
6.2˝ (156 mm) installed in B300-6 Base; 4.1˝ (104 mm) installed in B501 Base
3.4 oz. (95 g)
0.0063*
7 8
6 9
5
11
4
12
3
2
1 0
ONES
Duct Applications: 7351 is listed for use in ducts. See Duct Smoke Detectors
Applications Guide HVAG53 for details on pendant mount applications. NOTE:
Intelligent High-sensitivity Photoelectric smoke sensors are also listed for use
inside DNR(W) duct smoke detectors.
WIRING GUIDE
All wiring must be installed in compliance with the National Electrical Code,
applicable local codes, and any special requirements of the Authority Having
Jurisdiction. Proper wire gauges should be used. The installation wires should
be color-coded to limit wiring mistakes and ease system troubleshooting. Im-
proper connections will prevent a system from responding properly in the
event of a fire.
Remove power from the communication line before installing sensors.
1. Wire the sensor base (supplied separately) as shown in the wiring
diagram. (See Figure 2.)
2. Set the desired address on the sensor address switches. (See Figure 1.)
3. Install the sensor into 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 panel and
activate the communication line.
5. Test the sensor(s) as described in the TESTING section of this manual.
C0162-00 Dust covers provide limited protection against airborne dust particles during
shipping. Dust covers must be removed before the sensors can sense smoke.
Remove sensors prior to heavy remodeling or construction.
FIGURE 2. WIRING DIAGRAM:
Remote
Annunciator
+
(+)
+
2
RA
3
(–)
(–)
CLASS A OPTIONAL WIRING
(+)
TAMPER-RESISTANCE
Intelligent High-sensitivity Photoelectric smoke sensors include a tamper-re-
sistant capability that prevents their removal from the base without the use of
a tool. Refer to the base manual for details on making use of this capability.
1
3825 Ohio Avenue, St. Charles, Illinois 60174
800/736-7672, FAX: 630/377-6495
www.systemsensor.com
CAUTION
CAUTION: Do not loop wire under
terminal 1 or 2. Break wire run to
-
supervise connections.
+
+ +
2
– –
RA
1
1
3
+
+
2 –
RA
1
3
C0129-10
I56-4293-001
07/25/2018