System Sensor MHR and MHW - Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS
MHR and MHW Mini-Horns
3825 Ohio Avenue, St. Charles, Illinois 60174
800/736-7672, FAX: 630/377-6495
www.systemsensor.com
D690-07-00 1 I56-2958-001R
SpECIfICATIONS
General Specifications
Standard Operating Temperature:
32°F to 120°F (0°C to 49°C)
Humidity Range: 10 to 93% non-condensing
Nominal Voltage: Regulated 12DC/FWR or regulated 24DC/FWR
Operating Voltage Range: 8-33
Operating Voltage with MDL3: 8.5-33
Sounder Frequency: 3kHz (nominal)
Mechanical Specifications
Input terminal wire gauge:
12 to 18 AWG
Horn dimensions: 4.6˝L×2.9˝W×.45˝D (117 mm L×74 mm W×11.5 mm D)
GENERAL DESCRIpTION
The SpectrAlert Advance MH Series mini-horns are available in red or white.
They feature 12 or 24 volt operation, high and low volume settings, and tem-
poral or continuous tones. These small footprint horns can be mounted to
single gang back boxes for aesthetically sensitive applications. If required, the
MDL3 module can be used to provide synchronization.
NOTICE: This manual shall be left with the owner/user of this equipment.
fIRE ALARM SySTEM CONSIDERATIONS
The National Fire Alarm Code, NFPA 72, requires that all horns, used for
building evacuation installed after July 1, 1996, produce temporal coded sig-
nals. Signals other than those used for evacuation purposes do not have to
produce the temporal coded signal.
pOWER SUppLy CONSIDERATIONS
Panels typically supply DC filtered voltage or FWR (full wave rectified) volt-
age. The system design engineer must calculate the number of units used on
a loop based on the type of panel supply. Be certain the sum of all the device
currents does not exceed the current capability of the panel. Calculations are
based on using the device current found in the subsequent charts and must
be compatible with the current specified for the panel or power supply used.
Loop Design and Wiring
The system designer must make sure that the total current drawn by the de-
vices on the loop does not exceed the current capability of the panel supply,
and that the last device on the circuit is operated within its rated voltage.
The current draw information for making these calculations can be found in
the tables within this manual. For convenience and accuracy, use the volt-
age drop calculator on the System Sensor website (www.systemsensor.com)
or CD-ROM. When calculating the voltage available to the last device, it is
necessary to consider the voltage drop due to the resistance of the wire. The
thicker the wire, the smaller the voltage drop. Wire resistance tables can be
obtained from electrical handbooks. Note that if Class A wiring is installed,
the wire length may be up to twice as long as it would be for circuits that are
not fault tolerant.
WIRING
fIGURE 1. NON-SyNCHRONIzED DEvICES; ANy COMbINATION Of
MODELS pOWERED by A 2-WIRE CIRCUIT
Horn
(+)
(–)
(+)
(–)
E
O
L
(+)
(–)
(+)
(–)
Horn/strobe Strobe Only
Two Wire System
Any Mix of Models
Wired for Tandem
Operation
Horn
Synchronization Module
(+)
(–)
(+)
(–)
E
O
L
(+)
(–)
(+)
(–)
Horn/strobe Strobe Only
Two Wire System
Any Mix of Models
Wired for Tandem
Operation
MDL3
fIGURE 2. SyNCHRONIzED DEvICES; ANy COMbINATION Of MOD-
ELS pOWERED by A 2-WIRE CIRCUIT
Horn
(+)
(–)
(+)
(–)
E
O
L
(+)
(–)
(+)
(–)
Horn/strobe Strobe Only
Two Wire System
Any Mix of Models
Wired for Tandem
Operation
Horn
Synchronization Module
(+)
(–)
(+)
(–)
E
O
L
(+)
(–)
(+)
(–)
Horn/strobe Strobe Only
Two Wire System
Any Mix of Models
Wired for Tandem
Operation
MDL3
A0111-01
NOTE: For further information on synchronization see MDL3, panel, or power
supply installation manual.
NOTE: For 24 volt applications, the total number of horns on a single NAC
must not exceed 85 with a maximum loop resistance of 120 ohms. For 12 volt
applications, the total number of horns must not exceed 85 with a maximum
loop resistance of 120 ohms.
I56-2958-00
1R