SMD-427 PG2
SMD-426/427 PG2
Supervised Wireless PowerG Smoke Detector /
Heat and Smoke Detector
Installation Instructions
1. INTRODUCTION
SMD-426 PG2 (smoke detector) and SMD-427 PG2 (heat and 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 PowerG type transceiver.
SMD-426 PG2 / SMD-427 PG2 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 PowerG receiver or to a compatible wireless alarm control panel.
SMD-427 PG2 will activate a fire alarm upon either smoke or heat (temperature rate-of-rise) condition. With two fire sensors (heat and smoke), the SMD427 PG2 detector may shorten the time to fire alarm activation.
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 as
described here.
In alarm condition, the buzzer sound can be stopped for 12 minutes 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 12 minutes, the detector restarts the alarm
buzzer sound.
Note: The TEST/MUTE switch functions as TEST switch (in normal operation) or as
MUTE switch (in alarm condition).
The detector can also operate as a siren to indicate a fire alarm in other areas covered by
the alarm system, or to indicate burglar alarm events, as configured through the control panel
(see the PowerMaster Installer Guide).
The tamper switch actuator (Figures 9a and 9b) 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 transceiver to the
alarm system control panel.
Note: When the tamper switch is opened the detector becomes not ready for operation.
A. Buzzer hole B. Test / Mute button & LEDs
Figure 1. General View (SMD-427 PG2)
2. INSTALLATION
2.1 Disassembly
Separate the unit from its mounting bracket as shown in Figure 2.
2.2 Where to Install Smoke Detectors
WARNING! To comply with FCC and IC RF exposure compliance requirements, the smoke detector should be located at a distance of at least 20
cm from all persons during normal operation. The antennas used for this product must not be co-located or operated in conjunction with any other
antenna or transmitter.
Smoke detectors should be installed in accordance with the NFPA Standard 74 (National Fire Protection Association, Batterymarch Park, Quincy, MA
02169). For complete coverage in residential units, smoke detectors should be installed in all rooms, halls, storage areas, basements and attics in each
family living unit. Minimum coverage is one detector on each floor and one in each sleeping area and attics in each family living unit. For maximum
protection, a smoke detector should be located outside primary sleeping areas or on each level of your home. Here are a few useful tips for you:
Install a smoke detector in the hallway outside every separate bedroom area, as in Figure 3. Two detectors are required in homes with two bedroom
areas, as in Figure 4.
Install a smoke detector on every floor of a multi-floor home or apartment, as shown in Figure 5.
Install a minimum of two detectors in any household.
Install a smoke detector inside every bedroom.
Install smoke detectors at both ends of a bedroom hallway if the hallway is more than 12 meters (40 feet) long.
1. Hold the bracket with one hand
2. Rotate the detector anticlockwise and pull it from the bracket
A. BRACKET
B. DETECTOR
Figure 2. Separating the Detector from Its Bracket
A. DINING ROOM
B. KITCHEN
C. BEDROOM
D. LIVING ROOM
E. SMOKE DETECTORS FOR MINIMUM PROTECTION
F. SMOKE DETECTORS FOR MORE PROTECTION
Figure 3. Locations for Placing Smoke Detectors in a Single Residence with only One Sleeping Area
D-302894 SMD-426 PG2, SMD-427 PG2 Installation Instructions 1
Install a smoke detector inside every room where one sleeps with the door partly or completely closed, since smoke could be blocked by the closed
door and a hallway alarm may not wake up the sleeper if the door is closed.
A. FAMILY ROOM
B. KITCHEN
C. DINING ROOM
D. BEDROOM
E. LIVING ROOM
F. SMOKE DETECTORS FOR MINIMUM PROTECTION
G. SMOKE DETECTORS FOR MORE PROTECTION
Figure 4. Locations for Placing Smoke Detectors in Single-Floor Residence with More than One Sleeping Area.
A. BEDROOM
B. LIVING ROOM
C. KITCHEN
D. BASEMENT
E. GARAGE
F. SMOKE DETECTORS FOR MINIMUM PROTECTION
G. SMOKE DETECTORS FOR MORE PROTECTION
Install basement detectors at the bottom of the basement stairwell.
Install second-floor detectors at the top of the first-to-second floor stairwell.
Be sure no door or other obstruction blocks the path of smoke to the detector.
Install additional detectors in your living room, dining room, family room, attic, utility and storage rooms.
Install smoke detectors as close to the center of the ceiling as possible. If this is not practical, put the detector on the ceiling, at least 10 cm (4
inches) away from any wall or corner, as shown in Figure 6.
If ceiling mounting is not possible and wall mounting is permitted by your local and state codes, locate the detectors between 10 - 15 cm (4 - 6
inches) from the ceiling, also see Figure 6.
If some of your rooms have sloped, peaked, or gabled ceilings, try to mount detectors 0.9 meter (3 feet) measured horizontally from the highest
point of the ceiling as shown in Figure 7.
A. CEILING
B. CENTER OF CEILING
C. NEVER HERE
D. BEST LOCATION
E. ACCEPTABLE LOCATION
Figure 6. Recommended Best
and Acceptable Locations to
Mount Smoke Detectors
Figure 5. Placing Smoke Detectors in a Multi-Floor Residence
CAUTION (As required by the California State
Fire Marshall)
A. DETECTOR
B. HORIZONTAL DISTANCE FROM PEAK
Figure 7. Recommended Location to Mount
Smoke Detectors in Rooms with Sloped,
Gabled or Peaked Ceiling
"Early warning fire detection is best achieved
by the installation of fire detection equipment
in all rooms and areas of the household as
follows:
(1) A smoke detector installed in each
separate sleeping area (in the vicinity, but
outside the bedrooms), and (2) Heat or
smoke detectors in the living rooms, dining
rooms, bedrooms, kitchens, hallways, attics,
furnace rooms, closets, utility and storage
rooms, basements and attached garages."
2.3 Where Not to Install Smoke Detectors
False alarms occur when smoke detectors are installed where they will not work properly. To avoid false alarms, do not install smoke detectors in
the following situations:
Combustion particles are by-products of something burning. Do not install smoke detectors in or near areas where combustion particles are
present, such as kitchens with few windows or poor ventilation, garages where there may be vehicle exhaust, near furnaces, hot water heaters
and space heaters.
Do not install smoke detectors less than 6 meters (20 feet) away from places where combustion particles are normally present, like kitchens. If
a 20-foot distance is not possible, try to install the detector as far away from the combustion particles as possible, preferably on the wall. To
prevent false alarms, provide good ventilation in such places.
IMPORTANT: Never try to avoid false alarms by disabling the detector.
Do not mount smoke detectors in the path of fresh air intake. The flow of fresh air in and out can drive smoke away from the smoke detector;
thus reducing its efficiency. Figure 8 indicates the correct and incorrect locations concerning this problem.
Near paint thinner fumes.
In close proximity to an automobile exhaust pipe; this will damage the detector.
In damp or very humid areas or near bathrooms with showers. Moisture in humid air can enter the sensing chamber, then turns into droplets
upon cooling, which can cause false alarms. Install smoke detectors at least 3 meters (10 feet) away from bathrooms.
In very cold or very hot areas, including unheated buildings or outdoor rooms. If the temperature goes above or below the operating range of
smoke detector, it will not work properly. Verify that the temperature range of the detector falls within the Operating Temperature, (see chapter
2. Specifications).
In very dusty or dirty areas, dirt and dust can build up on the detector's sensing chamber, to make it overly sensitive.
Additionally, dust or dirt can block openings to the sensing chamber and keep the detector from sensing smoke.
Near fresh air vents or very drafty areas like air conditioners, heaters or fans. Fresh air vents and drafts can drive smoke away from smoke detectors.
2 D-302894 SMD-426 PG2, SMD-427 PG2 Installation Instructions
Dead air spaces are often at the top of a peaked roof, or in the corners between ceilings and walls. Dead air may prevent smoke from reaching
a detector. See Figures 6 and 7 for recommended mounting locations.
In insect-infested areas. If insects enter a detector's sensing chamber, they may cause a false alarm. Where bugs are a problem, get rid of
them before putting up a detector.
Near fluorescent lights, electrical "noise" from fluorescent lights may cause false alarms. Install smoke detectors at least 1.5 meters (5 feet)
from such lights.
Smoke detection depends on the smoke density present in a room. Smoke density is greater in small rooms, for the same amount of
smoke, than in large rooms.
In small rooms less than 25 cubic meters (883 cubic ft.) in size, a small amount of smoke may activate a smoke alert. For example, smoking
or bathroom steam may activate a smoke alert.
A. BEDROOM
B. AIR RETURN
C. BATH
D. AIR ENTRY
E. STOVE
F. KITCHEN
G. LIVING ROOM
H. CORRECT LOCATION
I. INCORRECT LOCATION
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.
Figure 8. Recommended Smoke Detector Locations to Avoid Air Streams with Combustion Particles
2.4 Audible and Visual Indications
The dual color LED, buzzer and siren are used to signal various alarm and trouble messages as shown in Table 1 below:
Condition
Smoke alarm Flash every 500ms - 3 long beeps every 4 sec.
Heat alarm(***) Flash every 500ms - Long beep every 2 sec.
Tamper alarm(*) - - Long beep every 2 sec.
Standby Flash every 30 sec. - -
Low battery Flash every 30 sec. - Short beep every 30 sec.
Smoke sensor trouble Flash every 60 sec. 3 Flashes every 60 sec. Short beep every 60 sec.
Low sensitivity alarm Flash every 30 sec.(**) - Short beep every 30 sec.
Heat sensor trouble(***) Flash every 60 sec. 5 Flashes every 60 sec. Short beep every 60 sec.
Need to clean 2 flashes every 30 sec. - 2 short beeps every 30 sec.
Burglar (siren) - - Steady tone
Fire (siren) - - 3 short tones every 1.5 sec.
Gas (siren) - - 4 rapid tones every 5 sec.
Flood (siren) - - 1 1-sec. tone every 3 sec.
Test See par. 3 "Smoke Detector 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
*** SMD-427 PG2 only
Table 1. Visual and Audible Indications
Visual Indication (LEDs) Audio
Red Yellow
Indication (buzzer or siren)
2.5 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 Figures 9a
and 9b below.
E
D
B
C
A
A. 3 volts CR123A
B. Open battery cover and connect the battery to its terminals (without
insulator). Verify proper polarity.
C. Battery cover
D. Enroll button
E. Tamper switch
Caution! Risk of explosion if battery is replaced by an incorrect type.
Dispose of used batteries according to the manufacturer's instructions.
Figure 9a. Battery Connection for CR123A
D-302894 SMD-426 PG2, SMD-427 PG2 Installation Instructions 3
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