System Sensor APA451 - Manual

D440-00-00 1 I56-468-05
APA451 Annunciator with
Piezo Alert
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
NOTICE: These models were only tested at the 16-33 Volt
DC limits. This does not include the 80% low-end or 110%
high-end voltage limits. This manual shall be left with the
owner/user of this equipment.
General Information
The National Fire Protection Association (NFPA) has pub-
lished codes, standards, and recommended practices for the
installation and use of this product. It is recommended that
the installer be familiar with these requirements, with local
codes, and any special requirements of the local authority
having jurisdiction. For further information, consult NFPA
72 and 90A requirements.
The System Sensor APA451 annunciator with piezo alert
is an audible signal appliance for fire alarm service. It is
intended for use in System Sensor 4-wire conventional duct
smoke detector applications without a system control panel
to comply with NFPA 90A.
The APA451 provides a red alarm LED, with an audible
annunciation of an alarm signal, and a green power LED.
Specifications
Dimensions: 4.6″ H × 2.75″ W × 1.5″ D
Weight: .17 lbs.
Electrical Requirements:
Voltage: Regulated 24VDC
Operational Voltage: 16–33VDC
Maximum Operating Current: 30mA
Connections: #6 binding head screws,
14 AWG to 18 AWG wire
UL Reverberant Room: 81 dBA min. @ 10 ft.
Temperature: –10°C to 38°C (14°F to 100°F)
Humidity: 5% to 95% Relative Humidity
Figure 1:
ALARM POWER
H0315-00