Gentex 7139CS/CSX & 7139LS Manual De Usuario

THIS EQUIPMENT SHOULD BE INSTALLED IN 

ACCORDANCE WITH THE NATIONAL FIRE PROTECTION

ASSOCIATION'S STANDARD 72 (National Fire Protection
Association, Batterymarch Park, Quincy, MA  02269).

For your information, the National Fire Protection

Association's Standard 72, reads as follows:

Smoke detectors shall be installed outside of each separate

sleeping area in the immediate vicinity of the bedrooms and on

each additional story of the family living unit including 
basements and excluding crawl spaces and unfinished attics.
In new construction, a smoke detector shall be installed in each

sleeping room.

Where to Locate the Required Smoke Detectors in Existing

Construction. The major threat from fire in a family living unit is

at night when everyone is asleep.  The principal threat to 
persons in sleeping areas comes from fires in the remainder of
the unit; therefore, a smoke alarm(s) is best located between

the bedroom areas and the rest of the unit.  In units with only
one bedroom area on one floor, the smoke alarms should be
located as shown in Figure 1.     

Are More Smoke Alarms Desirable? The required 

number of smoke alarms may not provide reliable early 
warning protection for those areas separated by a door from

the areas protected by the required smoke alarms.  For this
reason, it is recommended that the householder consider the
use of additional smoke alarms for those areas for increased 

protection.  The additional areas include: basement, 
bedrooms, dining room, furnace room, utility room and 
hallways not protected by the required smoke alarms.  The

installation of smoke alarms in kitchens, attics (finished or
unfinished), or garages is not normally recommended, as
these locations occasionally experience conditions that can

result in improper operation.

Figure 2:  IN FAMILY LIVING UNITS WITH MORE THAN ONE

SLEEPING AREA, A SMOKE ALARM SHOULD BE 
PROVIDED TO PROTECT EACH SLEEPING AREA IN 
ADDITION TO ALARMS REQUIRED IN BEDROOMS.

We recommend replacing your alarm(s) every ten (10)

years; why:

§ Dust, dirt, and other environmental contaminants can affect 

your alarm over a prolonged period.

§ Fast changing industry consensus standards and codes on 

all alarms make it advisable to periodically upgrade your 

alarm to maximize life safety.

§ Assurance that your smoke alarm needs are kept abreast 

with the constantly improving electronic technology.

§ Smoke alarms are recognized as one of the lowest cost 

ways to protect dwelling inhabitants against the danger of 
fire(s).  It makes good common sense to periodically 
replace and update your smoke alarm that contributes so 

much to life safety.

§ Ceiling location (CS & CSX only) - detector should be 

mounted as close as possible to the center of a hallway or 
room.  If this is not possible, the edge of the detector should 

be at least 4 inches from any wall.

§ Wall location-locate the top of the alarm at least 4 inches 

and not more than 12 inches from the ceiling.  Observe 
alarm for proper top/bottom orientation (test knob is near 

bottom of unit).  

Figure 4:  RECOMMENDED SMOKE ALARM MOUNTING

LOCATIONS.

Figure 5:  RECOMMENDED SMOKE ALARM LOCATION IN

ROOMS WITH SLOPED, GABLED, OR PEAKED CEILINGS.

Pg. 7-3

The placement of the alarm is critical if maximum speed

of fire detection is desired.  Thus, a logical location for an
alarm is the center of the ceiling.  At this location, the alarm
is closest to all areas of the room.

In mobile homes built after about 1978 that were

designed and insulated to be energy-efficient, smoke alarms

should be installed as described in the section above. In
older mobile homes that have little or no insulation 
compared to today's standards, uninsulated metal outside 

In family living units with more than one bedroom area or

with bedrooms on more than one floor, more than one smoke
alarm will be needed, as shown in Figure 2.

In addition to smoke alarms outside of the sleeping areas,

NFPA 72 requires the installation of a smoke alarm on each
additional story of the family living unit, including the 
basement.  These installations are shown in Figure 3.  The

living area smoke alarms should be installed in the living
room or near the stairway to the upper level, or in both 
locations.  The basement smoke alarm should be installed in

close proximity to the stairway leading to the floor above.
When installed on an open joisted ceiling, the alarm should
be placed on the bottom of the joists.  The alarm should be

positioned relative to the stairway so as to intercept smoke
coming from a fire in the basement before the smoke enters
the stairway.

Figure 1:  A SMOKE ALARM SHOULD BE LOCATED

BETWEEN THE SLEEPING AREA AND THE REST OF THE
FAMILY LIVING UNIT.

Figure 3:  A SMOKE ALARM SHOULD BE LOCATED ON

EACH STORY.

Construction. All of the smoke alarms specified for existing
construction are required, and, in addition, a smoke alarm is
required in each bedroom.