System Sensor B524RB, B224RB, B224RBA, B524RBA User Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS

B524RB(A) and B224RB(A) Plug-in
Relay Detector Bases

For use with the following models:
B524RB: For use with any 500 Series detector
B224RB: For use with any 200 Series detector

Specifications

Base Diameter: 6.2 inches (157 mm)
Base Height

B224RB: 1.2 inches (31 mm)
B524RB: 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)
31/2-inch octagon box, Min. depth - 1.5 inches (13 mm)

Operating Temperature Range: 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
Time Averaged Standby Ratings: <500 µA @ 24 VDC
Relay Characteristics

Coil: 2 coil latching
Contact Type: 1 Form C
Contact Relay
Resistive: 2 A @ 30 VDC
Inductive: 0.3 A @ 110 VDC (with .35 PF or greater)

0.3 A @ 120 VAC (with .35 PF or greater)

1.0 A @ 30 VDC (with .6 PF or greater)
Set Time: 4 seconds minimum, 20 seconds maximum
Reset Time: 1 second minimum, 8 seconds maximum

3825 Ohio Avenue, St. Charles, Illinois 60174

1-800-SENSOR2, FAX: [phone]

A Division of Pittway

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 appli­cations. Copies of these manuals are available at no charge
from System Sensor. (For installation in Canada, refer to
CAN/ULC-S524, Standard for the Installation for Fire Alarm
Systems and CEC Part 1, Sec. 32.)

NOTICE: This manual should be left with the owner/user
of this equipment.

IMPORTANT: The detector used with these bases must be
tested and maintained regularly following NFPA 72 require­ments. The detectors should be cleaned at least once a year.

D450-16-01 1 I56-659-06

General Information

Form C latching relay contacts are included for the control
of an auxiliary function. The relay operates 12 seconds
(nominally) after activation of the sensor head remote an­nunciator output.

Mounting

The detector base mounts directly to 31/2- and 4-inch oc­tagon 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).

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.

For signal wiring (the wiring between interconnected de­tectors), 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, crimp­ing, or soldering, as appropriate, for a reliable connection.

Alarm system control panels have specifications for allow­able loop resistance. Consult the control panel specifica­tions for the total loop resistance allowed before wiring the
detector loops.

Figure 1. Mounting the base to an electrical box:

SNAP ON
DECORATIVE
RING

SCREWS (NOT
SUPPLIED)

DETECTOR
BASE

BOX (NOT
SUPPLIED)

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 con­tacts can cause an unexpected, and possibly dangerous, ac­tivation 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.

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 ter­minal 1 and the relay common line to terminal 3. Wire the
communication lines in (+) and out (+)to terminal 4. In­sert 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 screwed­down position.

Check the zone wiring of all bases in the system before in­stalling 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

LISTED COMPATIBLE CONTROL PANEL

CLASS A OPTIONAL WIRING

3 RELAY COMMON
1 NORMALLY CLOSED
2 NORMALLY OPEN

TWISTED PAIR RECOMMENDED

(+)

(–)

(+)

(–)

1

(N.C.)

2

(N.O.)

3

(COMMON)

4

(+)

5

(–)

6

(S)

OTHER INTELLIGENT

DEVICES

Figure 2. Wiring diagram:

A label is affixed to the base for recording the zone, ad­dress, and type of detector being installed at the base loca­tion. This information is useful for setting the detector head
address and for verification of the sensor type required for
that location.

Once all detector bases have been wired and mounted, and
the loop wiring has been checked, the detector heads may
be installed in the bases.

Tamper-resist Feature

NOTE: Do not use the tamper-resist feature if the removal

tool is to be used.

This detector base includes a tamper-resist feature that pre­vents its removal from the base without the use of a tool.

A78-1577-15

To activate this feature, break the tab from the detector
base as shown in Figure 3A (see page 4). Then, install the
detector.

To remove the detector from the base once the tamper-re­sist feature has been activated, insert a small-bladed screw­driver into the slot in the side of the base and push the
plastic lever away from the detector head (see Figure 3B,
page 4). This allows the detector to be rotated counter­clockwise for removal.

NOTE: Head removal after the tamper-resist feature has

been activated first requires removal of the decora­tive ring.

The tamper-resist feature can be defeated by breaking and
removing the plastic lever from the base. However, this pre­vents the feature from being used again.

D450-16-01 3 I56-659-06

Figure 3A. Activating the tamper-resist feature:

Figure 3B. Removing the detector head from the
base:

BREAK TAB AT

PLASTIC LEVER

DOTTED LINE BY
TWISTING TOWARD
CENTER OF BASE.

The Limitations of Property Protection Smoke Detectors

The smoke detector used with this base is designed to activate and ini­tiate emergency action, but will do so only when it is used in conjunction

with an authorized fire alarm system. This detector must be installed in
accordance with NFPA standard 72.

Smoke detectors will not work without power. AC or DC powered
smoke detectors will not work if the power supply is cut off.

Smoke detectors will not sense fires which start where smoke does not
reach the detectors. Smoldering fires typically do not generate a lot of

heat which is needed to drive the smoke up to the ceiling where the
smoke detector is usually located. For this reason, there may be large de­lays in detecting a smoldering fire with either an ionization type detector
or a photoelectric type detector. Either one of them may alarm only after
flaming has initiated which will generate the heat needed to drive the
smoke to the ceiling.

Smoke from fires in chimneys, in walls, on roofs or on the other side of a
closed door(s) may not reach the smoke detector and alarm it. A detector
cannot detect a fire developing on another level of a building quickly or at
all. For these reasons, detectors shall be located on every level and in

every bedroom within a building.

Smoke detectors have sensing limitations, too. Ionization detectors and

photoelectric detectors are required to pass fire tests of the flaming and

USE SMALL-BLADED
SCREWDRIVER TO
PUSH PLASTIC LEVER
IN DIRECTION OF
ARROW.

WARNING

smoldering type. This is to ensure that both can detect a wide range of
types of fires. Ionization detectors offer a broad range of fire sensing capa­bility but they are somewhat better at detecting fast flaming fires than
slow smoldering fires. Photoelectric detectors sense smoldering fires better
than flaming fires which have little, if any, visible smoke. Because fires de­velop in different ways and are often unpredictable in their growth, nei­ther type of detector is always best, and a given detector may not always
provide early warning of a specific type of fire.

In general, detectors cannot be expected to provide warnings for fires re­sulting from inadequate fire protection practices, violent explosions, es­caping gases which ignite, improper storage of flammable liquids like
cleaning solvents which ignite, other similar safety hazards, arson, smok­ing in bed, children playing with matches or lighters, etc. Smoke detectors
used in high air velocity conditions may have a delay in alarm due to dilu­tion of smoke densities created by frequent and rapid air exchanges. Addi­tionally, high air velocity environments may create increased dust
contamination, demanding more frequent maintenance.

Smoke detectors cannot last forever. Smoke detectors contain electronic
parts. Even though smoke detectors are made to last over 10 years, any
part can fail at any time. Therefore, smoke detectors shall be replaced after
being in service for 10 years. The smoke detector system that this detector
is used in must be tested regularly per NFPA 72. This smoke detector
should be cleaned regularly per NFPA 72 or at least once a year.

A78-1175-08

Three-Year Limited Warranty

System Sensor warrants its enclosed smoke detector base to be free from
defects in materials and workmanship under normal use and service for a
period of three years from date of manufacture. System Sensor makes no
other express warranty for this smoke detector base. No agent, representa­tive, dealer, or employee of the Company has the authority to increase or
alter the obligations or limitations of this Warranty. The Company’s obli­gation of this Warranty shall be limited to the repair or replacement of any
part of the smoke detector base which is found to be defective in materials
or workmanship under normal use and service during the three year pe­riod commencing with the date of manufacture. After phoning System
Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return Authori­zation number, send defective units postage prepaid to: System Sensor,

Repair Department, RA #__________, 3825 Ohio Avenue, St. Charles, IL

60174. Please include a note describing the malfunction and suspected
cause of failure. The Company shall not be obligated to repair or replace
units which are found to be defective because of damage, unreasonable
use, modifications, or alterations occurring after the date of manufacture.
In no case shall the Company be liable for any consequential or incidental
damages for breach of this or any other Warranty, expressed or implied
whatsoever, even if the loss or damage is caused by the Company’s negli­gence or fault. Some states do not allow the exclusion or limitation of inci­dental or consequential damages, so the above limitation or exclusion may
not apply to you. This Warranty gives you specific legal rights, and you
may also have other rights which vary from state to state.

D450-16-01 4 I56-659-06

© System Sensor 1998