2 D-302894 SMD-426 PG2, SMD-427 PG2 Installation Instructions
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
Figure 5. Placing Smoke Detectors in a Multi-Floor Residence
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
A. DETECTOR
B. HORIZONTAL DISTANCE FROM PEAK
Figure 7. Recommended Location to Mount
Smoke Detectors in Rooms with Sloped,
Gabled or Peaked Ceiling
CAUTION (As required by the California State
Fire Marshall)
"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.
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