Specifications

4 D-301296
Figure 10. Recommended Smoke Detector Locations to Avoid Air
Streams with Combustion Particles
WARNING: Never remove batteries to stop a false alarm. Open a
window or fan the air around the detector to get rid of the smoke.
The alarm will turn itself off when the smoke is gone. If false
alarms persist, attempt to clean the detector as described in this
manual.
WARNING: Do not stand close to the detector when the alarm is
sounding. The alarm is loud in order to wake you in an
emergency. Too much exposure to the horn at close range may
be harmful to your hearing.
4.3 Smoke Detector Limitations
A. This smoke detector is designed for use in a single residential
unit or offices, which means that it should be used inside a
single family home or apartment or office.
B. Please refer to NFPA 101, the Life Safety Code, NFPA72 for
smoke detector requirements for fire protection in buildings not
defined as "households".
C. The smoke detector will not sense a fire if the smoke does
not reach the sensor. In order for a smoke detector to sense
smoke, it must be installed in the immediate vicinity of the fire.
In addition, smoke from fires in chimneys, in walls, on roofs, in
remote parts of the building, or on another level from where the
smoke detector is located, may not reach the smoke detector
quickly enough for occupants to escape unharmed. For this
reason, installer shall install smoke detectors on every level, in
every sleeping area and in every bedroom of the household.
D. Smoke detector may not be heard. The alarm horn in this
smoke detector meets or exceeds current Underwriter’s
Laboratories standards. However, if the smoke detector is not
located in the same room as the occupant or if it is blocked by a
closed door or normal noise, the alarm horn may not be heard.
In addition, sound sleepers, or persons who are under the
influence of drugs or alcohol may not hear the alarm or be able
to react to it. Therefore, locate this smoke detector, which
has a sounder rated at 85 dB at 10 feet, on every level, in
every sleeping area and in every bedroom of the
household.
E. This detector, if used as a stand-alone unit, will not alert
people who are hard of hearing.
F. In general, detectors may not always warn you about fires
caused by carelessness and safety hazards like smoking in
bed, violent explosions, escaping gas, improper storage of
flammable materials, overloaded electrical circuits, children
playing with matches or arson.
G Smoke detectors are not fool-proof. Like all electronic
devices, smoke detectors have limitations. No type of
smoke detector can sense every kind of fire every time. In
addition, smoke from slow, smoldering fires rises slowly
and may not reach the smoke detector until actual flame
breaks out. This type of smoke may not reach the smoke
detector in time for occupants to escaped unharmed.
H. Smoke detectors are not a substitute for life or property
insurance. Though smoke detectors have been responsible
for saving many lives, they are not warranted or implied to
protect lives or property in the event of fire.
I. These wireless systems are very reliable and are tested to
high standards. However, due to their low transmitting power
and limited range (required by the regulatory authorities), there
are some limitations to be considered:
i) Receivers may be blocked by radio signals on or near
their operating frequencies, regardless of the code
selected.
ii) A receiver can only respond to one transmitted signal at a
time.
iii) Wireless equipment should be tested regularly to
determine whether there are sources of interference and
to protect against faults.
5. TAKING CARE OF THE MCT-425 or MCT-425C
5.1 Battery Replacement
The MCT-425 and MCT-425C were designed to be as
maintenance-free as possible. To keep the smoke detector in good
working order, you must test it weekly, as instructed in Para. 6.1
below.
Make it a rule to replace the detector’s battery (alkaline) once a
year even if there is no indication that the battery is weak. Also
be sure to replace it immediately upon reception of a low battery
message via your control panel.
If you disregard this message, an audible reminder in the form
of once-per-minute "beep" will sound after a few days. The
low-battery "beep" should last at least 30 days before the
battery dies out completely.
NOTE: For best performance, use only alkaline or lithium
batteries as replacement batteries (see specifications). Carbon
zinc batteries are not acceptable. Alkaline batteries can be
purchased at any retail store that sells batteries.
Replace the battery as follows:
A. Separate the detector from its bracket (see figure 2).
B. Replace battery (see figure 3).
5.2 Maintenance
It is necessary to maintain the detector frequently to ensure it
working properly. Follow these tips for taking care of your detector:
• Use a vacuum cleaner to clean the air vents occasionally to
keep them free of dust. To clean the detector, remove it from
the bracket. Also, perform cleaning when the buzzer sounds
every 30 seconds in the middle of LED flashing interval – this
indicates degraded chamber sensitivity.
• Perform detector functional test (see par. 3.7) weekly.
• A clean (maintenance) signal is transmitted when the
detector's chamber sensitivity becomes degraded.
Note: This transmission applies to the PowerMax+ control
panel only.
Note: If false alarms keep occurring, check whether the
detector's location is adequate (see Para. 4.1 and 4.2).
Relocate the unit if it is not located properly. Clean as
described above.
6. ADDITIONAL ADVICE
6.1 Routine Testing
The detector should be tested weekly and also whenever you
suspect that it does not go into alarm. Push the test button firmly
with your finger until the horn sounds (it may take up to 20
seconds). Also verify that the control panel responds to the
transmitted fire alarm. If the detector fails, have it repaired or
replaced immediately, to ensure that it works properly.
Every 3 months the smoke detector must be checked by using
smoke detectors test sprayer.
WARNING: Never use an open flame of any kind to test your
detector. You may set fire to damage the detector as well as
your home. The built-in test switch accurately tests all