Installation Guidelines

All wiring must be installed in compliance with all appli- cable 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 re- duce the likelihood of wiring errors. Improper connections can prevent a system from responding properly in the event of a fire.

For signal wiring (the wiring between interconnected de- tectors), it is recommended that the wire be no smaller than 18 gauge (1.0 square mm). However, wire sizes up to 12 gauge (3.3 square mm) can be used with the base. The use of twisted pair wiring or shielded cable for the power (+ and -) loop is recommended to minimize the effects of electrical interference.

If shielded cable is used, the shield connection to and from the detector must be continuous by using wire nuts, crimp- ing, or soldering, as appropriate, for a reliable connection.

Alarm system control panels have specifications for allow- able loop resistance. Consult the control panel specifica- tions for the total loop resistance allowed before wiring the detector loops.

Wiring Instructions

WARNING

The base uses a latching relay that can change states if it is subjected to mechanical shocks or jarring. As a result, even though relay contacts are in the open state when the base is shipped from the factory, the contacts may have closed during shipment.

Connecting an auxiliary control circuit to closed relay con- tacts can cause an unexpected, and possibly dangerous, ac- tivation of that circuit. Therefore, do NOT connect an auxiliary control circuit to the relay contacts (terminals 1, 2, and 3) before ensuring that the relay contacts are in their open state. Ensure that the contacts are open by applying power to the bases WITHOUT the sensor heads installed.

Make wiring connections by stripping about 3/8" (10 mm) of insulation from the end of the wire. Then, slide the wire under the clamping plate and tighten the clamping plate screw.

Figure 1. Mounting the base to an electrical box:

SNAP ON

DECORATIVE

RING

SCREWS (NOT

SUPPLIED)

DETECTOR

BASE

BOX (NOT

SUPPLIED)

A78-1175-21

Wire the normally open (NO) line to terminal 2 (see Figure 2). Insert the normally closed (NC) line of the relay to ter- minal 1 and the relay common line to terminal 3. Wire the communication lines in (+) and out (+)to terminal 4. In- sert the communication line in (–) and out (–) to terminal

5.Terminal 6 is for shielded cable only (see Figure 2). If shielded cable is used, the shield connection to and from the detector must be continuous by using wire nuts, crimping, or soldering to ensure a reliable connection. If shielded cable is not used, leave terminal 6 in the screwed- down position.

Check the zone wiring of all bases in the system before in- stalling detector heads. This includes checking the wiring for continuity, correct polarity, ground fault testing, and performing a dielectric test.

D450-16-01

2

I56-659-06

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System Sensor B224RB(A), B524RB(A) installation manual Installation Guidelines, Wiring Instructions
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B224RB(A), B524RB(A) specifications

System Sensor B224RB(A) and B524RB(A) are advanced, reliable devices designed for comprehensive fire alarm systems. These hard-wired smoke detectors are engineered for both commercial and residential applications, contributing to enhanced safety and protection against fire hazards.

One of the main features of the B224RB(A) and B524RB(A) models is their use of photoelectric sensing technology. This type of sensing is particularly effective in detecting smoldering fires that produce a large amount of smoke but little heat. The photoelectric sensor utilizes a light source that is aimed at a sensor; when smoke enters the chamber, it scatters the light, triggering an alarm. This technology is known for reducing false alarms commonly associated with traditional ionization smoke detectors.

Another significant feature is the built-in sounder that provides local alarm notification. This integrated sounder enhances the device's effectiveness in alerting occupants to potential danger, ensuring prompt action can be taken. The sounder can often be configured to emit different tones, allowing for customizable alerts based on the specific requirements of the environment.

The B224RB(A) and B524RB(A) also incorporate advanced communication capabilities, compatible with various alarm control panels, providing flexibility in integration within different fire alarm systems. They support both conventional and addressable modes, offering ease of installation and maintenance. The devices are equipped with a robust network of features that allow for simultaneous monitoring and reporting, ensuring that incidents are quickly identified and communicated.

In terms of characteristics, these detectors boast a durable design that withstands the rigors of various environments. They are built to operate efficiently in temperature ranges suitable for typical indoor settings, ensuring consistent performance over time. Additionally, they are designed to be user-friendly, with LEDs that provide visual alerts indicating the operational status, allowing users to quickly ascertain if the device is functioning correctly.

Overall, the System Sensor B224RB(A) and B524RB(A) smoke detectors represent a sophisticated solution for fire safety, combining cutting-edge technology with practical features to deliver reliable performance in safeguarding life and property from the dangers of fire.
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