Visonic MCT425 Users Manual

MCT

MCT-425

MCTMCT

-425

-425-425

Supervised Wireless PowerCode Smoke Detector

1. DESCRIPTION AND APPLICATIONS

The MCT-425 is photoelectric smoke detector designed to sense
smoke, but not gas, heat or flame and fitted with a Power­Code-type UHF transmitter. It provides early warning of developing
fire by sounding an alarm with its built-in alarm horn, and by
transmitting a coded alarm signal to a PowerCode receiver or to a
compatible wireless alarm control panel.

It must be borne in mind, though, that effective pre-warning of fire
accidents is only possible if the detector is located, installed and
maintained properly as described in this manual.

WARNING: This smoke detector is designed for use in a single
residential unit only, which means that it should be used inside a
single family home or apartment. It is not meant to be used in
lobbies, hallways, basements or another apartment in multi-family
buildings, unless there are already working detectors in each
family unit. Smoke detectors, placed in common areas outside
the individual living unit, such as on porches or in hallways, may
not provide early warning to residents. In multi-family buildings,
each family living unit should obtain its own detector.

2222. INSTALLATION SUMMARY

. INSTALLATION SUMMARY

. INSTALLATION SUMMARY. INSTALLATION SUMMARY

2.1 Disassembly

Separate the unit from its mounting bracket as shown in Figure 2.

BRACKET DETECTOR

❶

Seize Bracket

❷

Rotate Unit

Counter-

Clockwise

WARNING: This detector is not meant
to be used in non-residential buildings.
Warehouses, industrial or commercial
buildings and special purpose non­residential buildings require special fire
detection and alarm systems. This
detector alone is not a suitable
substitute for complete fire detection
systems for places where many
people live or work, such as hotels or
motels. The same is true of
dormitories, hospitals, nursing homes
or group homes of any kind, even if
they were
once single family homes. Please refer to NFPA 101, the Life
Safety Code, NFPA71, 72A, 72B, 72C, 72D and 72E for smoke
detector requirements for fire protection in buildings not defined as
"households".

WARNING: This detector, if used as a stand-alone unit, will not
alert people who are hard of hearing.

Installation Instructions

Test

Button

Figure 1. General View

Battery cover

❸

Pull Away

From

Bracket

Figure 2. Separating the MCT-425 from its Bracket

2.2 Setting the Function Switch

The MCT-425 has a 4-position DIP switch function selector (see
Figure 3). The switch levers are numbered 1 to 4, and each switch
allows you to select one of two options.

Set the function switches as desired. The ON position is indicated
on the switch body.

Table 1. Function selector settings

Sw- Marking Pos. Selected Option Default

SW-1

SW-2

SW-3

SW-4

LED ON

RST ON

TRR ON

BAT ON

LED will light upon transmission

OFF

LED is disabled
“Restore” events reported

OFF

“Restore” events not reported
Do not use!

OFF

Always OFF
Do not use!

OFF

Alkaline or Lithium battery is
being used

ON

ON

OFF

OFF

TAMPER

Figure 3. Function Selector and Battery Cover

2.3 Definitions of LED Light and Buzzer

The red and yellow LED light and buzzer turn on and/or off to
indicate various situations. There are several LED light and
buzzer operations.

A. When the red LED flashes every 30 seconds, this means

power on, i.e., the detector is energized.

B. When the red LED flashes and the buzzer beeps intermittently,

this means alarm for potential smoke hazard.

C. When the red LED flashes together with buzzer beeps for every

30 seconds with temporal tone 0.5 second on and 0.5 second
off intermittently, this means battery power is low.

D. The yellow LED turns on every time an RF signal is transmitted

to the control panel.

2.4 Battery Connection and Initial Test

CAUTION: The MCT-425 is fitted with cover latches that will
prevent the cover from closing if there is no battery inside.

The smoke detector is supplied with a 9V battery seated within its
holder but insulated from the battery terminals.

DE3642 1

A. Connect the snap-on battery clip to the battery terminals. The

clip will not fit if the contacts are reversed, but take care
not to make a prolonged reverse contact - the battery will
discharge rapidly through the built in protection diode!

Note: When the battery first makes contact, the alarm horn may
sound for one second. This indicates that the battery is
connected properly.

B. Push the battery firmly in until it is seated tightly within the

holder, with the snap-on clip pressed against the contact
springs.

C. Close the cover, then press the test button for about 5

seconds until the horn sounds two sequences of a loud
3-beep alarm. This means that the smoke detection

section is working properly.

2.5 Resetting the Transmitter Module
and Enrolling its PowerCode ID

A rear tamper protection switch is
mounted under the PC board.
The tamper switch actuator,
extending through a hole in the
base (see Figure 4), is pressed
against the bracket when the unit
is attached to the bracket.
Removal of the unit from the
bracket will cause the switch
contacts to open, creating a
tamper event, which will be
reported by the transmitter to the
control panel.

Refer to the control panel’s installation instructions and follow the
procedure given there for enrolling transmitter IDs in the control
panel's memory. When required to initiate a transmission for
enrollment, press the smoke detector’s test button until the built-in
horn sounds, or press the tamper switch.

Note: It is much easier to carry out this operation while holding
the MCT-425 in your hand, close to the control panel.

TAMPER SWITCH ACTUATOR

Figure 4. Rear Tamper

Battery cover

A . At the location where you intend to install the detector, draw a

horizontal line six inches long.

B . Remove the mounting bracket from your unit by rotating it

counterclockwise (see Figure 2).

C. Place the bracket so that the two longest hole slots are

aligned on the line. in each of the keyhole slots, draw a mark
to locate a mounting plug and screw as in Figure 5.

D. Remove the bracket.
E. Using the appropriate size drill, drill two holes at the marks

and insert wall plugs.

F. Using the two screws and wall plugs (all supplied), attach the

bracket to the wall (see Figure 6).

2.7 Final Assembly and Test

Note: Unauthorized removal of the unit from the bracket will
initiate a tamper alert!

A. Press the test button until the built-in horn sounds. Verify that

the transmitted signal has been received at the control panel,
and that the control panel responds accordingly by activating
the fire alarm siren or any other warning device.

B. Attach the detector to the bracket as shown in Figure 7. Pull

outward to make sure that the detector is securely attached to
the bracket.

Note: A battery must be inserted into the detector before the
detector can be mounted onto the bracket.

BRACKET DETECTOR

Align Tabs

❶

With Slots

❷

Attach to

Bracket

2.6 Mounting the Bracket in Place

Read Section 4 in this manual first, then decide where to install a
detector. Refer to Figures 5 and 6 and proceed as follows:

Figure 5.

3333. SPECIFICATIONS

SMOKE DETECTOR
Detection Sensitivity: 2.66 ±1.11 %/ft obscuration
Alarm Sound Level: 85 dB at 3 m (10 feet)

TRANSMITTER AND CODING
Operating Frequency (MHz): 315, 433.92, 868.95, 869.2625 or

other frequency according to local requirements.
Transmitter's ID Code: 24-bit digital word, over 16 million

combinations, pulse width modulation.

Overall Message Length: 36 bits
Supervision: Automatic signaling at 60-minute intervals (US

version), 15-minute interval (UK version) or according to the local
standards.

Tamper Alerts: Tamper event (removal of the unit from its bracket)
is reported once, until the tamper switch is restored.

Transmission Indicator: Yellow LED lights upon transmission
(visible only when Switch SW-1 is ON).

Aligning the Bracket

. SPECIFICATIONS

. SPECIFICATIONS. SPECIFICATIONS

Figure 6.

Mounting the Bracket

❸

Rotate

Clockwise

Figure 7. Final Assembly

ELECTRICAL DATA
Power Source: 9 Volt alkaline or lithium.
Operation Voltage: From 7.2 V to 9.5 V.
Current Drain: 28 µA standby, 20 mA in operation

Battery Life Expectancy:
Alkaline: at least 1 year (for typical use)
Lithium: at least 2 years (for typical use)
Battery Supervision: Automatic transmission of battery status

data as part of any transmitted message.
Audible Low Battery Warning: Built-in horn beeps once a

minute for up to 30 days when the battery voltage drops.

PHYSICAL DATA
Operating Temperature: 0°C to 37.8°C (32°F to 100°F).
Relative Humidity: 10% to 85%
Dimensions: 130 mm (5.12") x 75 mm (2.95")
Weight (including battery): 272 g (9.6 oz)

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