System Sensor 2251TM Installation And Maintenance Instructions

INSTALLATION AND MAINTENANCE INSTRUCTIONS
2251TM Intelligent
Photoelectronic Smoke Sensor
Specifications
Operating Voltage Range:
Standby Current:
Max. Alarm Current (LED on:)
Operating Humidity Range:
Operating Temperature Range:
Heat Sensor:
Height:
Diameter:
Weight:
Additional Bases Available:
Before Installing
This sensor must be installed in compliance with the con-
trol 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 Association
(NFPA); see NFPA 72.
General Description
Model 2251TM is a plug-in type smoke sensor that com-
bines a photoelectronic sensing chamber and 135°F
(57.2°C) fixed temperature heat detection. The sensor uses
analog-addressable communications to transmit smoke den-
sity and other information to the control panel. Rotary-
decade switches are provided for setting the sensor's
address. 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
RA400Z).
This detector requires compatible addressable commu-
nications to function properly. Connect this sensor 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. For specific informa-
tion regarding sensor spacing, placement, and special
applications, refer to NFPA 72 or the System Sensor Guide
For Proper Use of System Smoke Detectors, available from
System Sensor (P/N I56-407-XX).
D200-08-00
15 to 32 VDC
300µA @ 24 VDC (one communication every 5 sec. with LED blink enabled)
6.5 mA @ 24 VDC
10% to 93% Relative Humidity, noncondensing
0° to 38°C (32° to 100°F)
135°F Fixed Temperature Electronic Thermistor
1.7 inches (43 mm) installed in B210LP Base
6.1 inches (155 mm) installed in B210LP Base
4.1 inches (104 mm) installed in B501 Base
5.0 oz. (142 g)
All 200/500 Series bases are compatible.
Wiring Instructions
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. Improper connections will prevent
a system from responding properly in the event of a fire.
Remove power from the communication line before
installing sensors.
All wiring must conform to applicable local codes, ordi-
nances, and regulations.
1. Wire the sensor base (supplied separately) per the
2. Set the desired address on the sensor address switches,
3. Install the sensor into the sensor base. Push the sensor
4. After all sensors have been installed, apply power to the
5. Test the sensor(s) as described in the TESTING section
1
firealarmresources.com
3825 Ohio Avenue, St. Charles, Illinois 60174
wiring diagram, see Figure 1.
see Figure 2.
into the base while turning it clockwise to secure it in
place.
control unit and activate the communication line.
of this manual.
A Division of Pittway
1-800-SENSOR2, FAX: 630-377-6495
I56-0001-01R