System Sensor B401BH-2 User manual

D450-00-00 4 I56-2816-002R
©2007 System Sensor
System Sensor warrants its enclosed product to be free from defects in materi-
als 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 air duct smoke detector. 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 replacement of any part of the product 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, Returns
D450-00-00 1 I56-2816-002R
B401BH-2
Sounder Bases
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: [phone]
www.systemsensor.com
Before Installing
Please thoroughly read the System Sensor manual I56-407-xxx,
Guide for Proper Use of System Smoke Detectors, which
provides detailed information on detector spacing, place-
ment, zoning, wiring, and special applications. Copies of
this manual are available at no charge from System Sensor.
NFPA 72 and NEMA should be observed.
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 re-
quirements. The detector used with these bases should be
cleaned at least once a year.
Specifications
Base Diameter: 6 inches (152 mm)
Base Height (less base and sensor): 0.75 inches (19mm)
Weight: 0.32 lb. (145 g)
Operating Temperature Range: 14° to 140°F (–10° to +60°C)
Operating Humidity Range: 10% to 95%, non-condensing
Electrical Ratings
Voltage: 17 to 32 VDC
Standby Current: 1.0 mA maximum
Alarm Current: 15 mA maximum
Maximum Ripple Voltage: 10% of supply voltage
Start-up Capacitance: 200 µF
Horn Input Current Requirement: 600 µA maximum
Sound Output: Greater than 90 dBa measured in anechoic room at 10 feet (3 meters), 24 volts.
85 dBa minimum measured in UL reverberant room.
Sounder Delay Time: 0.75 to 5.7 sec
General Description
Model B401BH-2 sounder bases is intended for use with
System Sensor 400 Series plug-in sensor heads in conven-
tional 2-wire plug-in systems. Refer to systems manuals
for the maximum allowable number of units per loop. The
B401BH-2 requires an external 24VDC (nominal) supply
with reverse polarity capability. The connections of the ex-
ternal supply (terminals 1 and 2) and the initiating loop
(terminals 3, 4, and 5) are isolated in the B401BH-2 to pre-
vent electrical interaction between them.
A loop of horns can be made to sound by reversing the po-
larity of the external supply.
NOTE: When the associated system is NOT used as a sup-
plementary evacuation system, the external 24VDC supply
must be treated as a component of the main power supply
system with the result that it falls under the requirements
of NFPA 72.
Please refer to insert for the Limitations of Fire Alarm Systems
Three-Year Limited Warranty
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 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.
I56-2816-002R

D450-00-00 3 I56-2816-002R
CLASS A OPTIONAL WIRING
UL LISTED COMPATIBLE
CONVENTIONAL CONTROL PANEL
EXTERNAL 24V
SUPPLY
CLASS A OPTIONAL WIRING
UL
LISTED
EOL
RESISTOR
UL
LISTED
EOL
RELAY
24V
(+) INIT.
(−) INIT.
(−)POWER
(+)POWER
45
21
3
45
21
3
45
21
3
Figure 3. Typical wiring layout:
SNAP ON
DECORATIVE
RING
SCREWS (NOT
SUPPLIED)
DETECTOR
BASE
BOX (NOT
SUPPLIED)
SHORTING
SPRING
Mounting
NOTE: It is recommended that the base be completely
wired before mounting.
See Figure 4. Attach the base directly to an electrical box us-
ing the screws supplied with the box. Then, use the plastic
screw covers, supplied with the base, to cover the screws.
The sounder base is 1.1 inches (28 mm) deep. Electrical boxes
must be 4 inches (102 mm) square by at least 1-1/2inches
(38 mm) deep; 2-1/8inches (54 mm) is recommended.
Testing
Before testing, notify the proper authorities that the smoke de-
tector system is undergoing maintenance and that the system
will be temporarily out of service. Disable the zone or system
undergoing maintenance to prevent unwanted alarms.
Detectors and bases must be tested after installation and
following periodic maintenance.
Test the B401BH-2 as follows:
1. Test the conventional detector head following the proce-
dure in its manual. The B401BH-2 should sound approx-
imately 0.75 to 5.7 seconds after the detector alarms.
2. Reverse the polarity of the external 24 VDC supply. This
should cause every base in the loop to sound after ap-
proximately 0.75 to 5.7 seconds.
Figure 4. Mounting to an electrical box:
C0503-00
D450-00-00 2 I56-2816-002R
B401BH-2 Terminals
No. Function
1 External Supply Positive (+)
2 External Supply Negative (–)
3 Negative (–) V
4 Positive (+) V In
5 Positive (+) V Out
Terminals 3, 4, and 5 are used for the communication/ini-
tiating circuit.
Installation Wiring Guidelines
All wiring must be installed in compliance with the Na-
tional Electrical Code and 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 de-
tectors), it is recommended that the wire be no smaller
than AWG 18. However, the screws and clamping plate in
the base can accommodate wire sizes up to AWG 12. The
use of twisted pair wiring or shielded cable for the power
(+ and –) loop is recommended to minimize the effects of
electrical interference on the initiating loop.
Begin electrical connections by stripping about 3/8” insula-
tion from the end of the wire. Then, slide the bare end of
the wire under the clamping plate and tighten the clamping
plate screw. Break the wire at each terminal to ensure that
the connections are supervised, as shown in Figure 2.
Figure 2.
DO NOT loop the wire under the clamping plate.
Check the zone wiring of the detector base before the
detector heads are installed. Perform continuity, base polar-
ity, and dielectric tests on the wiring.
Smoke detectors and alarm system control panels have
specifications for allowable supervision current. Consult
the control panel manufacturer’s specifications for the
total loop current supervision allowed for the control panel
being used before wiring the detector loops.
Wiring Instructions
The shorting spring in the base will disengage automati-
cally 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.
A typical wiring for a two-wire conventional system is
shown in Figure 3. Refer to this diagram as needed while
wiring the base into the system.
NOTE: Figure 3 shows external 24V supply polarity when
the loop system is in standby (NOT alarming).
Figure 1. Terminal Layout:
C0471-00
C0473-00
C0956-00