System Sensor B402B Manual de usuario

D450-03-00 1 I56-374-05R

B402B Plug-in Detector Base

For use with the following smoke detectors:

1451, 2451, and 2451TH

INSTALLATION AND MAINTENANCE INSTRUCTIONS

3825 Ohio Avenue, St. Charles, Illinois 60174

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

Before Installing

Please read the System Sensor manual I56-407, Guide for

Proper Use of System Smoke Detectors, which provides

detailed information on detector spacing, placement, zon-

ing, wiring, and special applications. Copies of this manual

are available at no charge from System Sensor. (For instal-

lations in Canada, refer to CAN4-S524, Standard for the

Installation of 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 this base must be

tested and maintained regularly following NFPA 72 require-

ments. The detector used with this base should be cleaned

at least once a year.

Specifications

Base Diameter: 6.2 inches (15.7 cm)

Base Height: 1.1 inches (2.8 cm)

Weight: 0.3 lb. (130 g)

Mounting: 4 inch square box with or without plaster ring. Min. Depth: 1.5 inches

4 inch octagon box. Min. Depth: 1.5 inches

3-1/2 inch octagon box. Min. Depth: 1.5 inches

Operating Temperature Range: 0° to +49°C (32° to 120°F)

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

Electrical Ratings — includes base and detector

System Voltage: 24 VDC

Maximum Ripple Voltage: 4 Volts peak to peak

Start-up Capacitance: 0.02 µF Maximum

Standby Ratings: 20 VDC Minimum

29 VDC Maximum

120 µA Maximum

Alarm Ratings: 17 mA Minimum

36 mA Maximum

Reset Voltage: 1.4 VDC Minimum

Reset Time: 0.3 Seconds Maximum

(If used, the RA400 remote lamp operates within the specified

detector alarm currents.)

Start-up Time: 34.0 Seconds Maximum

Relay Contact Ratings

Resistive or Inductive (60% Power Factor):

Form A: 2.0A @ 30 VAC/DC

Form C: 2.0A @ 30 VAC/DC

0.6A @ 110 VDC

1.0A @ 125 VAC

General Description

The plug-in detector base B402B is used with System

Sensor model 2451 and 2451TH photoelectronic detector

heads, and model 1451 ionization detector head. The capa-

bility of plugging these detectors into a variety of special

bases makes them more versatile than equivalent direct-

wired models. Refer to the System Sensor catalog for other

available plug-in detector bases.

This B402B base is intended for use in 4-wire systems, with

screw terminals provided for power, remote annunciator,

and relay contact connections. These bases also contain a

resistor to provide current limiting in the alarm state.

D450-03-00 2 I56-374-05R

Mounting

This detector base mounts directly to 31⁄2-inch and 4-inch

octagon boxes, and 4-inch square boxes (with or without

plaster). To mount the base, remove the decorative ring by

rotating it in either direction to unhook the snaps before

separating the ring from the base. Use the screws supplied

with the junction box to attach the base to the box through

the appropriate slots in the base (see Figure 1). Position the

decorative ring around the base and rotate it in either direc-

tion until the ring snaps into place.

Installation Guidelines

All wiring must be installed in compliance with the

National Electrical Code, all applicable local codes, and

any special requirements of the authority having jurisdic-

tion, using the proper wire size. 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). The screws and clamping

plate in the base can accommodate wire sizes up to 12

gauge (2.5 square mm). For best system performance, the

power (+ and –) loop wire should be twisted pair and

installed in separate grounded conduit to minimize the

effects of electrical interference.

Smoke detectors and alarm system control panels have

specifications for allowable loop resistance. Read the man-

ual for the control to determine the total loop resistance

allowed before wiring the detector loops.

Locate installations where normal ambient temperature

does not exceed 100°F.

Wiring Instructions

Wire connections are made by stripping approximately

3/8" (1 cm) insulation from the end of each wire, sliding

the bare end of the wire under the clamp plate, and tight-

ening the clamping plate screw. Use the strip gauges mold-

ed into the inside and underside of the base for ease of

wiring to terminals 1 through 5 and to terminals 12 through

14, respectively.

The zone wiring of the detector base should be checked

before installing the smoke detector head. To make this

possible, this base contains a special-type shorting jumper.

After the detector base is wired and attached to the electri-

cal box, make sure that the shorting spring is in contact

with the base of terminal 3. This temporary connection

SNAP ON

DECORATIVE

RING

SCREWS (NOT

SUPPLIED)

DETECTOR

BASE

BOX (NOT

SUPPLIED)

SHORTING

SPRING

Figure 1. Mounting base to box:

shorts the positive-in and positive-out leads and permits

the wiring of the loop to be checked for continuity.

Once all the detector bases have been wired and mounted,

and the loop wiring has been checked, the detector heads

may be installed in the bases. The shorting spring in the

base will disengage automatically when the detector head

is removed from the base. DO NOT remove the shorting

spring since it reengages as the detector head is turned into

the base, completing the circuit.

A78-1175-01

D450-03-00 3 I56-374-05R

For system supervision–DO NOT use looped wire under ter-

minals 2, 3, and 5. Break wire run to provide supervision

of system.

CAUTION

Figure 2. Typical wiring diagram:

NOTE: For wiring or releasing device, refer to manufac-

turer's installation instructions.

D450-03-00 4 I56-374-05R

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, representa-

tive, dealer, or employee of the Company has the authority to increase or

alter the obligations or limitations of this Warranty. The Company’s obli-

gation 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 materi-

als 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, unrea-

sonable use, modifications, or alterations occurring after the date of man-

ufacture. 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.

Tamperproof Feature

Do not use the tamperproof feature if the XR5 removal tool

is to be used.

This detector base can be made tamperproof to prevent the

removal of the detector head without the use of a tool. To

activate this feature, break off the tab on the detector base

as shown in Figure 3A, then install the detector. To remove

the detector from the base once the tamperproof feature

has been activated, place a small-bladed screwdriver into

CAUTION

PLASTIC LEVER

BREAK TAB AT

DOTTED LINE BY

TWISTING TOWARD

CENTER OF BASE.

USE SMALL-BLADED

SCREWDRIVER TO

PUSH PLASTIC LEVER

IN DIRECTION OF

ARROW.

the small hole on the side of the base and push the plastic

lever away from the detector head (see Figure 3B). This

will allow the detector to be rotated counterclockwise for

removal.

NOTE: Head removal after the tamperproof feature has

been activated first requires removal of the decora-

tive ring.

The tamperproof feature may be defeated by breaking and

removing the plastic lever from the base; however, this pre-

vents ever using the feature again.

Figure 3A. Activating tamperproof feature: Figure 3B. Removing detector head from base:

A78-1175-03A A78-1175-03B

Please refer to insert for the Limitations of Fire Alarm Systems

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