Visonic MCT-427, MCT-426 User Manual

MCT

MCT----426

MCTMCT

426,

426426

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MCT----427

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MCTMCT

427

427427

Supervised Wireless PowerCode Smoke / Heat and
Smoke Detector

1. DESCRIPTION AND APPLICATIONS

MCT-426 (photoelectric smoke detector) and MCT-427 (heat and photoelectric
smoke detector) are automatic fire detectors with integral audible signal for open
area protection, designed to sense heat or smoke (not flame) and fitted with a
PowerCode type UHF transmitter.
MCT-426 / MCT-427 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. For UL and
ULC approved installation use PowerMax+ or PowerMax Pro/Complete/Express
control panels.
MCT-427 will activate a fire alarm upon either smoke or heat condition. With two fire
sensors (heat and smoke), the MCT-427 detector may shorten the time to fire alarm
activation.
It must be borne in mind, though that effective prewarning of fire accidents is only
possible if the detector is located, installed and maintained as described here.
In alarm condition, the buzzer sound can be stopped for 8 minutes (UL) and 10
minutes (EN) by pressing the TEST/MUTE switch. It will not restore the alarm
condition, but will temporarily silence the buzzer while you correct the condition.
After 8 minutes (UL) and 10 minutes (EN), the detector restarts the alarm buzzer
sound.

2. SPECIFICATIONS

2. SPECIFICATIONS

2. SPECIFICATIONS2. SPECIFICATIONS

Alarm Sound Level: 85 dB at 3 m (10 feet)
TRANSMITTER AND CODING
Operating Frequency (MHz): 315, 433.92, 868.95, 869.2125 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 (315 MHz version), 15-

minute interval (433.92, 868.95, 869.2125 MHz versions) or according to the
local standards.
Tamper Alerts: Tamper event (removal of the unit from its bracket) is reported
once. Tamper restore is reported when the tamper switch is restored.
Transmission Indicator: Yellow LED lights upon transmission (visible only
when LED function is pre-defined, see par. 3.7).

ALARM REPORT:

Every 20 seconds for the first 3 minutes. Then, every 3 minutes until 30 minutes
have elapsed.

Alarm stops reporting after 30 min., or if the detector goes into "alarm restore".

After 30 minutes, an alarm bit will be sent as part of the supervision message.

ELECTRICAL DATA
Power Source: 3 Volt CR123A / CR17450 lithium.

Note: The CR17450 battery shall not be used in UL/c-UL applications.

Operation Voltage: From 2.7 V to 3 V.
Current Drain: 18 µA standby, 70 mA max. in operation
Smoke Density:

Europe: 0.09 – 0.14 dB/m
USA: 1.44%/ft to 2.74%/ft
Canada: 1.29%/ft to 2.27%/ft obs

Note: For UL/c-UL installations, Smoke Density is 0.91%/ft to 2.47%/ft for USA
and 0.91%/ft to 2.27%/ft for Canada.

Heat Sensor Alarm Threshold: 60° C (±3°) / 140° F (±5°)

Note: For UL/c-UL installations, Heat Sensor Alarm Threshold is 68°C (154°F).

Cover Range: 50 – 100 cubic meters (1770 – 3530 cubic ft.)
Battery Supervision: Automatic transmission of battery status data as part of any

transmitted message.

3. INSTALLATION

3. INSTALLATION

3. INSTALLATION 3. INSTALLATION

3.1 Disassembly

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

Note: The TEST/MUTE switch functions as TEST switch (in normal operation) or as
MUTE switch (in alarm condition).

The tamper switch actuator (Fig. 3) is pressed against the bracket when the unit is
attached to the bracket. Removal of the unit from the bracket causes the switch
contacts to open, creating a tamper event, which is reported by the transmitter to
the alarm system control panel.

Battery Life Expectancy: Battery life exceeds the minimum life required by UL 268
and CAN/ULC-S531-02. Visonic warrantees the life of the battery for 5 years.
Audible and Visual Low Battery Warning: Built-in horn beeps every 30
seconds simultaneously with red LED flashing (for up to 30 days when the
battery voltage drops).

Caution! Risk of explosion if battery is replaced by an incorrect type. Dispose of
used batteries according to the manufacturer's instructions.

Audible and Visual Degraded Chamber Sensitivity Warning: Built-in horn
beeps every 30 seconds in the middle of red LED flashing intervals – indicates
that the detector must be replaced.
Clean Warning Transmission: When the detector’s chamber becomes dirty, a
Trouble signal that indicates the need to clean the detector is sent to the control
panel. A dirty chamber can cause the detector to operate at high sensitivity. If this
message persists after cleaning, you may need to replace the detector.

Note: This transmission applies to the PowerMax+ (version F and higher) and
PowerMax Pro/Complete/Express control panels only.

PHYSICAL DATA
Operating Temperature: -10°C to 50°C (14°F to 122°F).

Note: For UL/c-UL installations, Operating Temperature is 0°C to 38°C (32°F to
100°F).

Relative Humidity: 10% to 85%
Dimensions: MCT-426 120 mm (4.7") x 58 mm (2.3")

Weight (including battery): 165 g (5.8 oz)
Compliance with Standard:

Designed to comply with:

Installation Instructions

TEST / MUTE

BUTTON

&

LEDS

2

Rotate the

detector

anticlockwise

and pull it from

the bracket

BUZZER

HOLE

Figure 1. General View (MCT-427)

MCT-427 120 mm (4.7") x 63 mm (2.5")

MCT-426/427 Europe: (868.95, 433.92 and 869.2125 MHz):

EN54-7 (except for § 4.2), EN 14604. EN 54-5 Class A2-S (except for § 4.4), EN
60950, EN 300220, EN 301489, EN 50130-4.

USA: 315MHz (FCC) CFR47 Part 15
Canada: (315 MHz): RSS210

MCT-426/427 USA (315MHz): UL 268
MCT-426/427 CANADA (315MHz): CAN/ULC-S531-02

BRACKET DETECTOR

1

Hold the

bracket with

one hand

Figure 2. Separating the Detector from Its Bracket

D-302151 MCT-426, MCT-427 Installation Instructions 1

3.2 Audible and Visual Indications

2 short beeps every

The dual color LED and buzzer are used to signal various alarm and trouble
messages as shown in Table 1 below:

Condition

Smoke alarm Flash every

Heat alarm(***) Flash every

Tamper alarm(*)

Standby

Low battery

Smoke sensor
trouble

Low sensitivity
alarm

Heat sensor
trouble(***)

Need to clean 2 flashes every 30

Test

* The tamper alarm will mute for 3 minutes at first power on, and will revert

to normal mode when the tamper switch condition is changed.
** Delay of 15 sec. between buzzer beep and LED operation
*** MCT-427 only

Table 1. Visual and Audible Indications

Visual Indication (LEDs)

Red

500ms

500ms

-

Flash every 30
sec.

Flash every 30
sec.

Flash every 60
sec.

Flash every 30
sec.(**)

Flash every 60
sec.

sec.

See par. 3.7

3 Flashes every
60 sec.

5 Flashes every
60 sec.

Yellow

-

-

-

-

-

-

-

3 long beeps every
4 sec.

3 long beeps every
4 sec.

Long beep every 2
sec.

Short beep every
30 sec.

Short beep every
60 sec.

Short beep every
30 sec.

Short beep every
60 sec.

30 sec.

Audio

Indication

-

3.3 Battery Connection and Initial Test

Attention: The detector battery cover is fitted with a red button that prevents the
detector from locking onto bracket if there is no battery inside.
The smoke detector is supplied with a 3V CR123A / CR17450 battery. Battery
connection for both types of batteries is illustrated in Figure 3a and 3b below.

3 volts CR123A

Open battery cover and
connect the battery to its
t e rm in al s ( w i th ou t
insulator). Verify proper
polarity.

3 volts CR17450

Transmission
LED ON/OFF

button

Battery cover

Tamper

switch

Open battery cover and connect the battery to its terminals.

Transmission
LED ON/OFF

Battery cover

Figure 3a. Battery Connection for CR123A

button

Tamper

switch

Figure 3b. Battery Connection for CR17450

Note: When the battery first makes contact, the alarm horn may sound for one

second. This indicates that the battery is connected properly.

Close the cover, then press the test button (see fig. 1) for about 5 seconds, (for
further details see par. 3.6).

3.4 Resetting the Transmitter Module and
Enrolling its PowerCode ID

The detector has a wall / rear tamper switch to alert removal of detector. The
tamper switch actuator, extending through a hole in the base (see Figure 3), 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 (see fig. 1) 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-426 /
MCT-427 in your hand, close to the control panel.

2

D-302151 MCT-426, MCT-427 Installation Instructions