Visonic MCT423 Users Manual

MCT-423

RESTORE

Supervised Wireless PowerCode Smoke Detector

1. INSTALLATION SUMMARY

1.1 Disassembly

A. Separate the unit from its mounting bracket as shown in

Figure 1.

Figure 1. Separating the MCT-423 from its Bracket

B. Open the MCT-423 by pulling the cover away from the base

at the point indicated by “OPEN HERE” in Figure 2.

Figure 2. MCT-423 with Cover Swung Open

1.2 Setting the Function Switch

The MCT-423 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.

Open the cover and set the function switches as desired. The ON
position is indicated by the arrow near the switch body.

Table 1. Function selector settings

Sw- Marking Pos. Selected Option Defaul

SW-1 LED ON

SW-2

SW-3 TR-REP ON

LED will light upon transmission

OFF

LED is disabled

ON

“Restore” events reported

OFF

“Restore” events not reported
Alarm reported every 3 min.

OFF

Alarm reported only once

t
ON

ON

OFF

SW-4 BAT ON

Note: Transmissions initiated by “tamper” events will be repeated
once every 3 minutes, regardless of SW-3 setting.

1.3 Battery Connection and Initial Test

CAUTION: The MCT-423 comes with cover latches that will
prevent the cover from closing if there is no battery
inside.

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

A. Pull the battery out and peel off the insulating material to

expose the terminals.

B. Match the battery terminals with the flexible contacts on the

detector PCB. Be sure to get the polarity right. If you

reverse the [+] and [–], the battery will discharge
completely within a very short time through the built in
protection diode!

C. When the terminals are properly matched, push the battery

firmly in until it is seated tightly within the holder.

Note: When the battery first makes contact with the detector,

the alarm horn may sound for one second. This indicates that
the battery is positioned properly.

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

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

section is working properly.

1.4 Resetting the Transmitter Module and Enrolling
its PowerCode ID

A tamper protection switch is
mounted on the transmitter
board. The tamper 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.

Installation Instructions

Lithium battery is being used

OFF

Alkaline battery is being used

Figure 3. Transmit Indicator and Function Switch

Figure 4. Tamper Switch

OFF

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Besides its tamper protection role, the tamper switch is
used to reset the transmitter at power up - this is
important for proper function of the unit.

To reset the transmitter and enroll its ID in the control panel’s
memory, proceed as follows:

A. Close the cover and turn the unit over, so that you can see

the back of the base.

B. Press the tamper switch once and release it. This will perform

the reset necessary for smooth transmitter power-up.

C. Refer to the control panel’s installation instructions and follow

the procedure given there for enrolling transmitter IDs. When
required to initiate a transmission for enrollment, press the
smoke detector’s test button until the built-in horn sounds.

Note: It is much easier to carry out this operation while holding
the MCT-423 in your hand, close to the control panel.

1.5 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. Aligning the Bracket

1st.At the chosen location, draw a 15 cm (6”) long horizontal line.
2nd.Press the bracket against the mounting surface, aligning the

two longest keyhole slots with the line drawn in Step A. Mark
the drilling spots through two opposite keyhole slots.

C. Drill two 5 mm (3/16”) holes at the marked spots.
D. Attach the bracket to the wall, using the two screws and

plastic wall anchors (supplied).

Figure 6. Mounting the

Bracket

1.6 Final Assembly and Test

1st. Before attaching the detector unit to the bracket, it is a good

practice to secure the cover to the base with two screws
(supplied with the unit) through the holes shown in Figure 7.
This will prevent unauthorized opening of the cover.

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Note: Unauthorized removal of the unit from the bracket will

initiate a tamper alert!

3rd. Attach the detector to the bracket as shown in Figure 8. Pull

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

Figure 7. Securing the Cover to the Base

B. 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.

2. DESCRIPTION AND APPLICATIONS

The MCT-423 is photoelectric smoke detector designed to sense
smoke, but not gas, heat or flame and fitted with a Power- Code­type 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 set up its own detector.

Figure 8. Final Assembly

WARNING: This detector is not meant

to be used in non-residential
buildings. Warehouses, industrial or
commercial buildings and special
purpose non-residential 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

Figure 9. General View
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.

3. SPECIFICATIONS

SMOKE DETECTOR
Detection Sensitivity: 2.3 ±1.2 %/ft.
Alarm Sound Level: 85 dB at 3 m (10 feet)
Activity Indicator: LED in test button flashes once per 45 sec.
Audible Low Battery Warning: Built in horn beeps once a

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

TRANSMITTER AND CODING
Operating Frequency (MHz): 315, 418, 433.92, 868 or other

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

combinations, pulse width modulation.

Overall Message Length: 36 bits
Message Repetition: Repetitive transmission (once every 3

minutes) or one-shot, as selected with on-board DIP switch.

Supervision: Automatic signaling at 60-minute intervals.
Tamper Alerts: Tamper event (removal of the unit from its

bracket) is reported every 3 minutes, until the tamper switch is
restored.

Transmission Indicator: Red LED lights upon transmission
(visible only when the cover is open and Swith SW-4 set to ON).

ELECTRICAL DATA

Power Source: 9 Volt alkaline or lithium.

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Current Drain: 28 µA standby, 20 mA in operation
Battery Life: At least one year
Battery Supervision: Automatic transmission of battery status

data as part of any transmitted message.
PHYSICAL DATA

Operating Temperature: 4.4°C to 37.8°C (40°F to 100°F).

Relative Humidity: 10% to 85%
Dimensions: 140 mm (5.5") x 45 mm (1.75")
Weight (including battery): 256 g (9 oz)