User Manual

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D450-15-00 1 I56-725-04

B524BI and B224BI Plug-in Isolator

Detector Bases

For use with the following smoke detectors:

In US: B524BI: 1551, 2551, 2551T, 5551, 5551R

B224BI: 1251, 2251, 3251

INSTALLATION AND MAINTENANCE INSTRUCTIONS

A Division of Pittway

3825 Ohio Avenue, St. Charles, Illinois 60174

1-800-SENSOR2, FAX: 630-377-6495

Before Installing

Please thoroughly read the system wiring and installation

manuals, and manual I56-407, Guide for Proper Use of Sys-

tem Smoke Detectors, which provides detailed information

on detector spacing, placement, zoning, and special appli-

cations. Copies of these manuals are available at no charge

from System Sensor.

NOTICE: This manual should be left with the owner/user

of this equipment.

IMPORTANT: The detectors used with these bases must be

tested and maintained following NFPA 72 requirements.

The detectors used with these bases should be cleaned at

least once a year.

General Information

Isolator bases prevent an entire communications loop from

being disabled when a short circuit occurs. They accom-

plish this by isolating that part of the loop containing the

Specifications

Base Diameter: 6.2 inches (157 mm)

Base Height

B224BI: 1.2 inches (31 mm)

B524BI: 1.4 inches (36 mm)

Mounting: 4-inch square box with or without plaster ring, Min. depth - 1.5 inches (13 mm)

4-inch octagon box, Min. depth - 1.5 inches (13 mm)

3-1/2-inch octagon box, Min. depth - 1.5 inches (13 mm)

Operating Temperature Range: –10°C to +60°C (14°F to 140°F)

NOTE: Do not install in locations where normal ambient temperature

extends beyond 0° to 49°C (32° to 120°F)

Operating Humidity Range: 10% to 93% Relative Humidity (Non-condensing)

Electrical Ratings

Operating Voltage: 15 to 28 VDC

Current

Standard: 450µA Maximum

Alarm: 5mA Maximum

short from the remainder of the circuit. These bases also

automatically restore the entire loop when the cause of the

short circuit is corrected. In general, up to 25 addressable

devices may be isolated between isolator bases. For the

purposes of determining the number of devices between

isolator bases, one 3251 is equivalent to 12 addressable de-

vices. For example, (13) 2251’s and (1) 3251 may be

grouped between two isolator bases.

Mounting

The detector base mounts directly to 3

/2- and 4-inch octa-

gon and 4-inch square boxes, with or without a plaster

ring. To mount, remove the decorative ring by rotating it in

either direction to unhook the snaps. Then, separate the

ring from the base. Install the base on the box, using the

screws supplied with the junction box and the appropriate

slots in the base. Replace the decorative ring on the base

and rotate it in either direction until the ring snaps in place

(see Figure 1).

Summary of content (4 pages)

PAGE 1
INSTALLATION AND MAINTENANCE INSTRUCTIONS B524BI and B224BI Plug-in Isolator Detector Bases For use with the following smoke detectors: In US: B524BI: 1551, 2551, 2551T, 5551, 5551R B224BI: 1251, 2251, 3251 Specifications Base Diameter: Base Height B224BI: B524BI: Mounting: Operating Temperature Range: Operating Humidity Range: Electrical Ratings Operating Voltage: Current Standard: Alarm: 6.2 inches (157 mm) 1.2 inches (31 mm) 1.4 inches (36 mm) 4-inch square box with or without plaster ring, Min.
PAGE 2
Installation Guidelines All wiring must be installed in compliance with all applicable local codes and any special requirements of the local authority having jurisdiction, using the proper wire sizes. The conductors used to connect smoke detectors to control panels and accessory devices should be color-coded to reduce the likelihood of wiring errors. Improper connections can prevent a system from responding properly in the event of a fire. Figure 1.
PAGE 3
Figure 3. Wiring diagram: ALL WIRING SHOWN IS SUPERVISED. 2 (–) 3 (+) (– ) 2 1 (+) (+ ) 3 1(+ (– ) 2 2 (–) (S) ) 4 (+ ) 3 (S) ) 4 COMMUNICATION LINE TWISTED PAIR IS RECOMMENDED 1(+ 1 (+) 3 (+) 2 (–) 2 (–) (–) (+) (–) (+) (–) (–) (+) (+) (–) (+) (+) GROUPS OF ADDRESSABLE DEVICES ARE SEPARATED BY FAULT ISOLATOR BASES. ANY COMBINATION OF COMPATIBLE, LISTED DEVICES MAY BE MIXED WITHIN A GROUP.
PAGE 4
Figure 4A. Activating the tamper-resist feature: PLASTIC LEVER Figure 4B. Removing the detector head from the base: BREAK TAB AT DOTTED LINE BY TWISTING TOWARD CENTER OF BASE. USE SMALL-BLADED SCREWDRIVER TO PUSH PLASTIC LEVER IN DIRECTION OF ARROW. A78-1175-08 WARNING The Limitations of Property Protection Smoke Detectors smoldering type. This is to ensure that both can detect a wide range of types of fires.