System Sensor SpectrAlert Advance MH Series User manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS
MHRA and MHWA Mini-Horns
MHRZA and MHWZA Silencable Mini-Horns
D690-07-00 1 I56-3027-000
Specications
General Specications
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 Specications
Nominal Voltage: regulated 12dc/fwr or regulated 24dc/fwr
Operating Voltage: 8-33 volts
Operating Voltage with MDLA: 9-33 volts
MHRZA/MHWZA Electrical Specications
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 tempo-
ral or continuous tones. These small footprint horns
can be mounted to single gang back boxes for aes-
thetically 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 silence 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 fea-
ture. 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 re-
quirements 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 ltered voltage or FWR
(full wave rectied) voltage. The system design en-
gineer 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 sub-
sequent charts and must be compatible with the cur-
rent specied for the panel or power supply used.
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 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 voltage drop calculator on the System Sen-
sor website (www.systemsensor.com) or CD-ROM.
When calculating the voltage available to the last de-
vice, 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
6581 Kitimat Rd., Unit #6, Mississauga, Ontario, L5N 3T5
1-800-SENSOR2, FAX: [phone]
www.systemsensor.ca

D690-07-00 2 I56-3027-000
©2006 System Sensor
to twice as long as it would be for circuits that are not
fault tolerant.
Wiring
Figure 1. Non-Synchronized devices; any combi-
nation 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
MDLA
Figure 2. Synchronized devices; any combina-
tion 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
MDLA
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
MHRZA/MHWZA SOUNDER OUTPUT (dBA) IN
ANECHOIC ROOM
Table 1B.
MHRA/MHWA CURRENT DRAW (mA RMS)
MHRZA/MHWZA CURRENT DRAW (mA RMS)
Table 1C.
DIRECTIONAL CHARACTERISTICS (90° REFERENCE)
Switch
Position
Sound Pattern Volume Power
Supply
Voltage
8 12 16 24 33
1 Temporal High DC 87 91 94 95 95
FWR 90 93 94 95 95
2 Temporal Low DC 86 89 91 93 93
FWR 88 92 93 92 90
3 Non-Temporal High DC 86 88 90 92 93
FWR 86 89 90 92 94
4 Non-Temporal Low DC 85 88 89 91 92
FWR 85 88 89 90 91
Switch
Position
Sound Pattern Volume Power
Supply
Voltage
16 24 33
1 Temporal High DC 89 90 91
FWR 92 91 91
2 Temporal Low DC 87 89 89
FWR 90 89 89
3 Non-Temporal High DC 89 90 90
FWR 87 89 90
4 Non-Temporal Low DC 86 87 86
FWR 86 86 89
Switch
Position
Sound Pattern Volume Power
Supply
Voltage
8 12 16 24 33
1 Temporal High DC 6 9 13 16 18
FWR 6 8 10 14 21
2 Temporal Low DC 5 8 11 13 15
FWR 5 6 9 12 14
3 Non-Temporal High DC 7 11 15 19 21
FWR 6 9 12 16 19
4 Non-Temporal Low DC 6 9 12 15 17
FWR 5 8 11 14 16
Switch
Position
Sound Pattern Volume Power
Supply
Voltage
16 24 33
1 Temporal High DC 18 17 13
FWR 18 15 12
2 Temporal Low DC 16 13 11
FWR 16 13 10
3 Non-Temporal High DC 21 19 14
FWR 20 17 14
4 Non-Temporal Low DC 17 15 11
FWR 17 14 11
MHRA/MHWA SOUNDER OUTPUT (dBA) IN ANECHOIC ROOM
Model Axis -3dBA
Angle
-6dBA
Angle
MHRA/
MHWA
Horizontal 40°, 140° 37°, 145°
Vertical 37°, 140° 34°, 142°
MHRZA/
MHWZA
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 single gang mud ring, which allows
sufcient clearance for conduit entrance.
2. The MH Mini-Horn is compatible with DC line su-
pervision. The horn is polarized and has terminals
marked with polarity. Apply 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.
Figure 3.
NOTE: SHOWN WITH CONTROL P A NEL IN ALARM. PANEL POLARITY
REVERSED IN SUPERVISORY CONDITION.
TO EOL
OR
NEXT
DEVICE
FROM
CONTROL
PANEL OR
PREVIOUS
DEVICE
A0358-00
D690-07-00 3 I56-3027-000
©2006 System Sensor

The horn will not work without power. The horn gets its power from
the fire/security 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, Repair Department, RA #__________,
6581 Kitimat Rd., Unit #6, Mississauga, Ontario, L5N 3T5. 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, modications, 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 conse-
quential damages, so the above limitation or exclusion may not apply to you. This
Warranty gives you specic 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 communications.
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.
Please refer to insert for the Limitations of Fire Alarm Systems
D690-07-00 4 I56-3027-000
©2006 System Sensor
– This Class B digital apparatus complies with Canadian ICES-003.