Systemsensor B404BT Duct smoke detector for special application Datasheet

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
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
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 systems. 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 detector 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 provide an audible and visible indication of smoke detector status.
Specifications
Operating Voltage/ Alarm current
Mounting base dependent (see char t)
Construction
Flame retardant Nor yl plastic
Standby current
120 mA maximum
Operating Temperature
32° to 120°F (0° to 49°C)
Sensitivity
3% ± .7% / ft.
Humidity Range
10 to 93% RH non-condensing
Weight
0.5 ib. (277 g)
Air Velocity Rating
0 to 3000 fpm maximum
Size
3.2˝/8.1 cm height
6.2˝/15.8 cm diameter
Architectural/Engineering Specifications
The air duct detector shall be a System Sensor model 2451 Series Smoke detector UL listed to UL 268A specifically for use in
air handling systems when used in conjunction with the B404B (120VAC) or the B404BT (24VAC/DC) base. The detector shall
operate at air velocities up to 3000 feet per minute. It shall be capable of local testing via magnetic switch or remote testing
using the UL listed RTC Remote Test Coil accessory with the RTS451 Remote Test Station. It shall be capable of providing
duct smoke detector status via the UL listed model APA451 Piezo Annunciator.
Base Chart
Base
Model
Version
Loop Type
Current Limit
resistor
Alarm Contact Type
Nominal Voltage
Alarm Current
(mA)
B404B
UL/ULC
4-wire
Yes
Form A&C + A supy.
120VAC
20.4
B404BT
UL
4-wire
Yes
Form A&C + A supy.
24VAC/DC rms
94
Junction Box Selection
Base Model
Single Gang
31/2˝ Oct.
4˝ Oct.
4˝ Sq.
B404B
No
No
Yes
Yes
No
No
No
B404BT
No
No
Yes
Yes
No
No
No
50mm 60mm
75mm
Wiring Guide
B404B Typical Wiring Diagrams:
(+)
EOL
2
14
5
1
13
12
120 VAC
FIRE
ALARM
CONTROL
PANEL
RELEASING
DEVICE
4
3
2
6
RA400Z
(Optional)
(–)
4
3
BLACK LEADS
TRANSFORMER
PRIMARY
(+)
RA400Z
(Optional)
(–)
7
8
9
10
14
5
1
13
SPECIFIED
BY PANEL
MANUFACTURER
12
120 VAC
11
6
7
8
9
10
11
ALARM INITIATION LOOP
POWER
RELEASING
DEVICE
RELEASING
DEVICE
POWER
H0270-00
B404B Base Terminals
No.
RA400Z
(Optional)
Function
1
Remote Annunciator (+)
2
Not Used
3
Not Used
4
Remote Annunciator (-)
5
Not Used
6
N.O.
7
N.O.
8
N.O.
9
N.O.
10
C.
11
C.
12
N.O.
13
N.C.
14
C.
4
3
BLACK LEADS
TRANSFORMER
PRIMARY
Supervisory Relay
Form A Contacts
EOL
2
14
5
1
13
SPECIFIED
BY PANEL
MANUFACTURER
12
6
Alarm Relay
Form A
Initiation Contacts
Alarm Relay
Form C
Auxiliary Contacts
120 VAC
FIRE
ALARM
CONTROL
PANEL
7
8
9
10
11
ALARM INITIATION LOOP
POWER
FAN/DAMPER
CONTROL
H0271-00
B404BT Typical Wiring Diagrams:
3 APA451
2
1 (Optional)
RELEASING
DEVICE
4
3
3 APA451
2
1 (Optional)
EOL
2
2
14
5
1
13
12
24 VACrms/DC
6
FIRE
ALARM
CONTROL
PANEL
RELEASING
DEVICE
4
3
7
9
8
10
14
5
1
13
SPECIFIED
BY PANEL
MANUFACTURER
12
24 VACrms/DC
11
6
7
8
9
10
11
ALARM INITIATION LOOP
H0268-00
NOTE: ABOVE DIAGRAM SHOWS NFPA REQUIRED WIRING OF SUPERVISED
SYSTEMS. SCHEMATIC SHOWN BELOW FOR REFERENCE.
3 APA451
2 (Optional)
1
CT POWER SOURCE
ROPRIATE TERMINALS
H DETECTOR. SEE
CATIONS FOR
NAL POWER SUPPLY
ATION.
SUPERVISORY
RELAY
SUPERVISORY
RELAY
ALARM
RELAY
CONTROL
PANEL
ALARM
RELAY
4
3
2
14
5
1
13
12
24 VACrms/DC
6
RING OF AUXILIARY
S, REFER TO
ACTURER'S
ATION INSTRUCTIONS
TACT MANUFACTURER.
HE SUPERVISORY RELAY NOW
ES A "FORM C" CONTACT FOR
MIZED APPLICATIONS.
ANDARD APPLICATIONS, ONLY
" CONTACT IS USED
7
8
9
10
POWER
11
B404BT Base Terminals
No.
Function
1
Remote Annunciator (+)
2
Test Coil (+)
3
Not Used
4
Remote AnnunciatorEOL
(-)
5
RTC (-)
6
N.O.
7
N.O.
8
N.O.
9
N.O.
10
C.
11
C.
12
N.O.
13
N.C.
14
C.
SPECIFIED
BY PANEL
SupervisoryMANUFACTURER
Relay
Form A Contacts
Alarm Relay
Form A
Initiation Contacts
Alarm Relay
Form C
Auxiliary Contacts
FAN / DAMPER
SHUTDOWN
RTC Ring Replacement of B404BT:
H0269-00
RTC Wiring Diagram:
B404B/B404BT
REMOTE
ANNUNCIATOR (+)
TEST COIL (+)
RTS451
1
1
2
2
3
4
EOL RESISTOR
SPECIFIED BY
PANEL MANUFACTURER
RTC (–)
TEST
COIL
3
FIELD
INSTALLED
JUMPER
5
4
5
TEST
COIL
ALARM
4-POSITION
TERMINAL
BLOCK
H0272-00
H0233-00
ALARM
ALARM
POWER
RESET
RTS451KEY
Remote Test Station
(provided with Remote
Test Coil)
APA451
Piezo Annunciator
RA400Z
Remote Annunciator
Top Mount in Ventilation Shaft
Ordering Information
Part No.
Description
Accessories
Description
2451
Photoelectronic plug-in detector (order one of the bases
RTC
Remote test coil kit (Includes RTS451 remote
test station)
listed below and the RTC)
B404B
120VAC detector base
APA451
Remote annunciator with piezo alarm
B404BT
24VAC/DC detector base
RA400Z
Remote annunciator
System Sensor Sales and Service
System Sensor Headquarters
3825 Ohio Avenue
St. Charles, IL 60174
Ph: 800/SENSOR2
Fx: 630/377-6495
Documents-on-Demand
800/736-7672 x3
www.systemsensor.com
System Sensor Canada
Ph: 905.812.0767
Fx: 905.812.0771
System Sensor in China
Ph: 86.29.524.6253
Fx: 86.29.524.6259
System Sensor – Far East
Ph: 85.22.191.9003
Fx: 85.22.736.6580
System Sensor Europe
Ph: 44.1403.891920
Fx: 44.1403.891921
System Sensor in Singapore
Ph: 65.273.2230
Fx: 65.273.2610
System Sensor – Australia
Ph: 613.54.281.142
Fx: 613.54.281.172
© 2004 System Sensor. The company reserves the right to change product specifications without notice.
System Sensor – India
Ph: 91.124.2371770 x.2700
Fx: 91.124.237.3118
A05-0952-001•1/04•#1228
Similar pages