Datasheet > B404B

B404B

更新时间： 2022-12-20 08:57:30

品牌	Logo	应用领域
SYSTEMSENSOR		/
页数	文件大小	规格书
4页	334K
描述
Duct Smoke Detector for Special Applications

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B404B 数据手册

H V A C

S Y S T E M S

M O N I T O R I N G

Duct Smoke

Detector for Special

Applications

Model

2451 with B404B/B404BT

and RTC Remote Test Kit

UL 268A

(Requires RTC

accessory)

Product Overview

Low standby current

Two LEDs “blink” in standby

Detector head plugs easily into base

Field adjustable sensitivity

Built-in test switch

2451 with B404BT and RTC

(Includes the RTS451)

The System Sensor 2451 photoelectronic smoke detector is UL listed

to UL 268A speciﬁcally for use in no-ﬂow/low-ﬂow air-handling sys-

tems. It’s designed for installations where a standard Venturi principle

duct smoke detector is unsuitable. This is the perfect combination for

installation in ducts where the air velocity is below 500 fpm or for duct

sizes as small as 8 inches in diameter. Pendant mounted in a standard

electrical box within the duct, the twist-in/twist-out head allows easy

removal from the base for quick cleaning and maintenance. The detec-

tor can be combined with the System Sensor B404B 120VAC base or

the B404BT 24VAC/DC base. Remote testing is accomplished using our

Remote Test Coil accessory that includes the RTS451. The APA451,

Remote Annunciator with Piezo Alarm, can also be connected to pro-

vide an audible and visible indication of smoke detector status.

Field sensitivity metering of detector to meet

the requirements of NFPA 72

120VAC and 24VAC/DC bases with built-in

shorting spring

Built-in tamper-resistant feature

Designed for mounting on standard electrical box

SEMS screws for easy wiring and positive wire

retention

Removable cover and insect screen for ﬁeld

cleaning

Speciﬁcations

Operating Voltage/ Alarm current

Construction

Mounting base dependent (see chart)

Flame retardant Noryl plastic

Standby current

Operating Temperature

120 mA maximum

32° to 120°F (0° to 49°C)

Sensitivity

Humidity Range

3% ± .7% / ft.

10 to 93% RH non-condensing

Weight

Air Velocity Rating

0.5 ib. (277 g)

0 to 3000 fpm maximum

Size

3.2˝/8.1 cm height

6.2˝/15.8 cm diameter

12 3 4

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