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Series Photoelectric Smoke Detectors
Models Available Two-Wire Models 2W-B 2WT-B Four-Wire Models 4W-B 4WT-B Accessories 2W-MOD2 SENS-RDR RT A77-AB2 2-wire standard 2-wire standard with thermal

4-wire standard 4-wire standard with thermal

2-wire loop test/maintenance module Sensitivityreader Removal/replacement tool Retrofit adapter bracket

Product Overview Plug-in detector line – mounting base included Large wire entry port In-line terminals with SEMS screws Mounts to octagonal and single-gang backboxes, 4-square backboxes, or direct to ceiling Stop-Drop ’N Lock™ attachment to base Removable detector cover and chamber for easy cleaning Built-in remote maintenance signalingDrift compensation and smoothing algorithms Simplified sensitivity measurement Wide angle, dual color LED indication Loop testing via EZ Walk feature Built-in test switch System Sensor’s i3™ series smoke detectors represent a significant advancement in conventional detection. The i3 family is founded on three principles: Installation ease, Intelligence, and Instant inspection. Installation ease.The i3 line redefines installation ease with its plug-in design.

This allows an installer to pre-wire the bases included with the heads. The large wire entry port and in-line terminals provide ample room for neatly routing the wiring inside the base. The base accommodates a variety of back box mounting methods as well as direct mounting with drywall anchors. To complete the installation, i3heads plug-in to the base with a simple Stop-Drop ’N Lock action.
Intelligence. i3 detectors offer a number of intelligent features to simplify

testing and maintenance. Drift compensation and smoothing algorithms are standard with the i3 line, to minimize nuisance alarms. When connected to the 2W-MOD2 loop test/maintenance module, or a panel equipped with the i3 protocol, 2-wire i3 detectors arecapable of generating a remote maintenance signal when they are in need of cleaning. This signal is indicated via an LED located at the module and the panel. To read the sensitivity of i3 detectors, the SENS-RDR is a wireless device that displays the sensitivity in terms of percent per foot obscuration.
Instant inspection. The i3 series provides wide angle red and green LED indica-

tors forinstant inspection of the detector condition, indicating: normal standby, out-of-sensitivity, alarm, or freeze trouble conditions. When connected to the 2W-MOD2 loop test/maintenance module or a panel with the i3 protocol, the EZ Walk loop test feature is available on 2-wire i3 detectors. This feature verifies the initiating loop wiring by providing LED status indication at each detector.
2093S911

3011446 7272-1209:210

290-01-E

Architect/Engineer Specifications Smoke detector shall be a System Sensor i3 Series model number_______, listed to Underwriters Laboratories UL 268 for Fire Protection Signaling Systems. The detector shall be a photoelectric type (model 2W-B, 4W-B) or a combination photoelectric/ thermal (model 2WT-B, 4WT-B) with thermal sensor rated at 135°F (57.2°C).The detector shall include a mounting base for mounting to 31⁄2-inch and 4-inch octagonal, single gang, and 4-inch square back boxes Electrical Specifications
Operating Nominal: Min.: Max.: Voltage 12/24V non-polarized 8.5V 35V Standby Current 2-wire: 50 µA maximum average 4-wire: 50 µA maximum average Maximum Alarm Current 2-wire: 130 mA limited by control panel 4-wire: 20 mA @12V, 23mA @ 24VPeak Standby Current 2-wire: 100 µA 4-wire: n/a Alarm Contact Ratings 2-wire: n/a 4-wire: 0.5 A @ 30V AC/DC

with a plaster ring, or direct mount to the ceiling using drywall anchors. Wiring connections shall be made by means of SEMS screws. The detector shall allow pre-wiring of the base and the head shall be a plugin type. The detector shall have a nominal sensitivity of 2.5% per foot nominal...