System Sensor SPECTR Alert Advance Series User manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS
MHRA and MHWA Mini-Horns
MHRZA and MHWZA Silencable Mini-Horns
1 I56-3027-002
5/21/2019
Specications
General Specifications
Standard Operating Temperature: 0°C to 49°C (32°F to 120°F)
Humidity Range: 10 to 93% non-condensing
Sounder Frequency: 3kHz (nominal)
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)
MHRA/MHWA Electrical Specifications
Nominal Voltage: regulated 12vfwr, regulated 24dc/fwr, special application 12vdc
Operating Voltage: 8-33vfwr, 9.5-33vdc
Operating Voltage with MDLA: 9-33 vfwr, 9.5-33vdc
MHRZA/MHWZA Electrical Specifications
Nominal Voltage: regulated 24dc/fwr
Operating Voltage: 16-33 volts
Operating Voltage with MDLA: 16-33 volts
Silence time: 10 minutes max.
Power down time to reset silence: 4 seconds min.
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 temporal or continuous tones. These small
footprint horns can be mounted to single gang back boxes for
aesthetically sensitive applications. If required, the MDLA module
can be used to provide synchronization.
The models MHRZA/MHWZA include an led alarm indicator and
silence switch. During alarm, pressing the silence switch will si-
lence the horn for a maximun of 10 minutes. The silence can be
reset by removing power for a minimun of 4 seconds.
Also included in these models is a silence test feature. During an
alarm, if the silence button is held down for more then 5 seconds
and released, the unit will silence but resound in 10 seconds.
These devices are to be installed according to the requirements of
local codes/authorities and CAN/ULC S524.
NOTICE: This manual shall be left with the owner/user of this
equipment.
Fire Alarm System Considerations
The National Building Code, and CAN/ULC S525, requires that
all horns, used for building evacuation produce temporal coded
signals. 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) voltage. 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 sup-
ply used.
I56-3027-002
3333 Unity Drive, Mississauga, ON L5L 3S6
800/736-7672, FAX: [phone]
www.systemsensor.ca
Loop Design and Wiring
The system designer must make sure that the total current drawn
by the devices on the loop does not exceed the current capability
of the panel supply, and that the last device on the circuit is oper-
ated 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 voltage drop cal-
culator 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 re-
sistance of the wire. The thicker the wire, the smaller the voltage
drop. Wire resistance tables can be obtained from electrical hand-
books. 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.

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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 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
A0111-01
NOTE: For further information on synchronization see MDLA,
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.
Sounder Selection
Sounder setting selection is accomplished by using the rotary
switch on the back. (See Figure 3.) The sound measurements for
the various settings are shown in Table 1A. The current draw for
the various settings are shown in Table 1B. Directional character-
istics are shown in Table 1C.
Table 1A.
MHRA/MHWA SOUNDER OUTPUT (dBA) IN ANECHOIC
ROOM
Switch
Position
Sound
Pattern
Volume Power
Supply
Voltage
12 24
1 Temporal High DC 87.1 91.8
FWR 90.8 91.7
2 Temporal Low DC 86 90
FWR 90 90
3 Non-
Temporal
High DC 87 91
FWR 89 91
4 Non-
Temporal
Low DC 86 90
FWR 88 90
MHRZA/MHWZA SOUNDER OUTPUT (dBA) IN ANECHOIC
ROOM
Switch
Position
Sound
Pattern
Volume Power
Supply
Voltage
24
1 Temporal High DC 91.8
FWR 92
2 Temporal Low DC 89
FWR 89
3 Non-Tem-
poral
High DC 90
FWR 89
4 Non-Tem-
poral
Low DC 87
FWR 86
Table 1B.
MHRA/MHWA CURRENT DRAW (mA RMS)
Switch
Position
Sound
Pattern
Volume Power
Supply
Voltage
12 24
1 Temporal High DC 12.6 22.1
FWR 15.0 23.0
2 Temporal Low DC 10.3 16.6
FWR 12.1 18.8
3 Non-
Temporal
High DC 13.6 23.0
FWR 14.6 21.8
4 Non-
Temporal
Low DC 10.2 16.6
FWR 12.1 18.8
MHRZA/MHWZA CURRENT DRAW (mA RMS)
Switch
Position
Sound
Pattern
Volume Power
Supply
Voltage
24
1 Temporal High DC 24.1
FWR 24.3
2 Temporal Low DC 18.2
FWR 20.8
3 Non-
Temporal
High DC 24.4
FWR 23.8
4 Non-
Temporal
Low DC 18.2
FWR 20.5
Table 1C.
DIRECTIONAL CHARACTERISTICS (90° REFERENCE)
Model Axis -3dBA Angle -6dBA Angle
MHRA/MHWA Horizontal 40°, 140° 37°, 145°
Vertical 37°, 140° 34°, 142°
MHRZA/MH-
WZA
Horizontal 35°, 142° 32°, 145°
Vertical 40°, 140° 37°, 150°

Mounting
1. The MH Mini-Horn is intended for mounting to a standard
21/2˝ deep single gang box or a standard 4 × 4 box, with sin-
gle gang mud ring, which allows sufficient clearance for con-
duit entrance.
2. The MH Mini-Horn is compatible with DC line supervision. The
horn is polarized and has terminals marked with polarity. Ap-
ply positive supply voltage to the (+) terminal and negative to
the (–) terminal. (See Figure 3.)
3. Mount the horn to the electrical outlet box using the two
mounting screws supplied.
4. Do not paint or alter finish of unit.
Figure 3.
NOTE: SHOWN WITH CONTROL PANEL IN ALARM. PANEL POLARITY
REVERSED IN SUPERVISORY CONDITION.
TO EOL
OR
NEXT
DEVICE
FROM
CONTROL
PANEL OR
PREVIOUS
DEVICE
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The horn will not work without power. The horn gets its power from the fire/secu-
rity panel monitoring the alarm system. If power is cut off for any reason, the horn
will not provide the desired audio or visual warning.
The horn may not be heard. The loudness of the horn meets (or exceeds) current
Underwriters Laboratories’ standards. However, the horn may not alert a sound
sleeper or one who has recently used drugs or has been drinking alcoholic bever-
ages. The horn may not be heard if it is placed on a different floor from the person
in hazard or if placed too far away to be heard over the ambient noise such as traffic,
air conditioners, machinery or music appliances that may prevent alert persons from
hearing the alarm. The horn may not be heard by persons who are hearing impaired.
WARNING
The Limitations of Horns
Three-Year Limited Warranty
System Sensor warrants its enclosed smoke detector to be free from defects in ma-
terials 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
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 repair or replacement
of any part of the smoke detector which is found to be defective in materials or
workmanship under normal use and service during the three year period commenc-
ing with the date of manufacture. After phoning System Sensor’s toll free number
1-800-SENSOR2 (736-7672) for a Return Authorization number, send defective units
postage prepaid to: System Sensor Canada (3PL), c/o Kuehne and Nagel, 6335
Edwards Blvd., Mississauga, Ontario L5N 2W7, RA #__________. Please include a
note describing the malfunction and suspected cause of failure. The Company shall
not be obligated to repair or 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 inci-
dental damages for breach of this or any other Warranty, expressed or implied what-
soever, 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 under common law.
FCC Statement
SpectrAlert Strobes and Horn/Strobes have been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed and used in accordance
with the instruction manual, may cause harmful interference to radio communica-
tions. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his
own expense.
This Class B digital apparatus complies with Canadian ICES-003.
Please refer to insert for the Limitations of Fire Alarm Systems
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©2019 System Sensor. 5/21/2019