System Sensor b224bi Install and Maint Instructions

INSTALLATION AND MAINTENANCE INSTRUCTIONS and B224BI Plug-in Isolator Bases use with the following smoke detectors: US: 2551, 2551T, 5551, 5551R 2251, 3251 SENSOR Division of Pittway 3825 Ohio Avenue, St. Charles, Illinois 60174 FAX: 630-377-6495 Diameter: Height B224BI: B524BI: Temperature Range: Humidity Range: Ratings Voltage: Standard: Alarm: to 28 VDC Maximum Maximum inches (157 mm) inches (31 mm) inches (36 mm) square box with or without plaster ring, Min. depth – 1.5 inches (13 mm) octagon box, Min. depth – 1.5 inches (13 mm) octagon box, Min. depth – 1.5 inches (13 mm) C to +60(cid:176) C (14(cid:176) F to 140(cid:176) F) Do not install in locations where normal ambient temperature extends beyond 0(cid:176) to 49(cid:176) C (32(cid:176) to 120(cid:176) F) to 93% Relative Humidity (Non-condensing) Installing thoroughly read the system wiring and installation and manual I56-407, Guide for Proper Use of Sys- Smoke Detectors, which provides detailed information detector spacing, placement, zoning, and special appli- Copies of these manuals are available at no charge System Sensor. This manual should be left with the owner/user this equipment. The detectors used with these bases must be and maintained following NFPA 72 requirements. detectors used with these bases should be cleaned at once a year. Information bases prevent an entire communications loop from disabled when a short circuit occurs. They accom- this by isolating that part of the loop containing the from the remainder of the circuit. These bases also restore the entire loop when the cause of the circuit is corrected. In general, up to 25 addressable may be isolated between isolator bases. For the of determining the number of devices between bases, one 3251 is equivalent to 12 addressable de- For example, (13) 2251 and (1) 3251 may be between two isolator bases. detector base mounts directly to 31/2- and 4-inch octa- and 4-inch square boxes, with or without a plaster To mount, remove the decorative ring by rotating it in direction to unhook the snaps. Then, separate the from the base. Install the base on the box, using the supplied with the junction box and the appropriate in the base. Replace the decorative ring on the base rotate it in either direction until the ring snaps in place Figure 1). Manuals Online! – Guidelines wiring must be installed in compliance with all appli- local codes and any special requirements of the local having jurisdiction, using the proper wire sizes. conductors used to connect smoke detectors to control and accessory devices should be color-coded to re- the likelihood of wiring errors. Improper connections prevent a system from responding properly in the event a fire. signal wiring (the wiring between interconnected de- it is recommended that the wire be no smaller 18 gauge (1.0 square mm). However, wire sizes up to gauge (3.3 square mm) can be used with the base. The of twisted pair wiring or shielded cable for the power and loop is recommended to minimize the effects of interference. Detector head power is supplied by terminals 1(+) 2(-). Therefore, the head will be part of this group. shielded cable is used, the shield connection to and from detector must be continuous by using wire nuts, crimp- or soldering, as appropriate, for a reliable connection. system control panels have specifications for allow- loop resistance. Consult the control panel specifica- for the total loop resistance allowed before wiring the loops. the zone wiring of all bases in the system before in- detectors. This includes checking the wiring for correct polarity, ground fault testing, and per- a dielectric test. 2: PAIR RECOMMENDED 1. Mounting base to electrical box: ON (NOT (NOT INTELLIGENT