Gentex 7139CS/CSX & 7139LS Manual De Usuario

walls and roofs can transfer heat and cold from outdoors, 

making the air right next to them hotter or colder than the rest
of the inside air.  These layers of hotter or colder air can pre-
vent smoke from reaching a smoke alarm.  Therefore, put

smoke alarms in such units only on inside walls, between 4 and
12 inches (10 and 30 cm) from the ceiling.  If you are not sure
about the insulation level in your mobile home, or if you notice

that the walls or ceiling are unusually hot or cold, put the alarm
on an inside wall.

Minimum protection requires one alarm as close to the

sleeping area as possible.  For better protection, put one alarm
in each room, but first read the "Locations to Avoid."

Nuisance alarms are caused by placing alarms where they

will not operate properly.  To avoid nuisance alarms, do not
place alarms:
§ In or near areas where combustion particles are normally 

present such as kitchens; in garages where there are 
particles of combustion in vehicle exhausts; near furnaces, 

§ In air streams passing by kitchens.   Figure 6 shows how 

an alarm  can be exposed to combustion particles in normal 
air movement paths, and how to correct this situation.

§ Near fluorescent light fixtures.  Electrical "noise" from 

nearby fluorescent light fixtures may cause a nuisance alarm.  

WARNING:  Never remove power from the alarm to silence a

nuisance alarm.   Open a window or fan the air around the
alarm to remove the smoke.   The alarm will automatically turn
off when the smoke in the air is completely gone.  Do not stand

close to the alarm.  The sound produced by the alarm is loud 
because it is designed to awaken you in an emergency.
Prolonged exposure to the horn at a close distance may be

harmful to your hearing.

1.  Remove alarm from mounting plate by turning 

counter-clockwise. 

2.  Remove AC power connector and unsnap power leads from 

the top of the old battery.  Snap new battery onto snaps and 
reinsert battery through hole in the back of the alarm. 

WARNING: Units with battery back-up will not provide power or   

transmit an alarm to AC only units in the event of 
an AC power failure. 

Figure 6.

All battery back-up units in tandem, with good batteries, 

will operate normally during an AC power failure.*
*Strobe will not operate during AC power failure.

1.  Use U.L. listed cable with Class 1 insulation.
2.  Observe local code requirements.  Use box connector to 

anchor cable to outlet box.

3.  Metal outlet boxes must be grounded to earth ground.
4.  Use only Duracell MN 1604 battery with 

the 7109/7139 Series smoke alarms.

CAUTION: Turn off electricity to prevent SHOCK and damage
to alarm.  Be sure the power line to the alarm is not controlled
by any on/off switch, or other type of switch, other than a fuse

or circuit breaker.
IMPORTANT: Insure that all fluorescent lighting fixtures are
properly grounded.

WARNING: Alarm installation must conform to the electrical
codes in your area and to Article 760 of the U.S. National
Electrical Code.  Wire installation should be performed only by

a licensed electrician.

Use a 2" x 3" switch box or a 4" square or octagon junction

box.  Mount a box for each alarm.  If wall mounting is desired,
be sure the box screws are oriented to upper right and lower
left corners.  Be sure to use supplied Mounting Plate.

NOTE: For trouble areas where there can be a large

volume of air blowing out through the electrical junction box.
You must first attach an adhesive backed foam gasket, which

has been packed with your alarm, to the back side of the
mounting bracket before it's secured to the junction box.

1.  Run a minimum of 16 gauge, 2-conductor cable, plus 

ground (3 wires) to the alarm junction box from a power 
supply.  Smoke alarms should be run on their own 

dedicated circuit.  Use U.L. listed Class 1 wire.

2.  Make wire connections to the supplied plug-in connector as 

follows:  black to black, white to white, and connect the 

ground wire to the metal outlet box.

Figure 7.

NOTE/RED-YELLOW WIRE:  The red-yellow wire from the

alarm is for tandem connection only.  DO NOT USE, AND DO
NOT REMOVE INSULATION CAP UNLESS CONNECTING
ANOTHER ALARM.

Pg. 7-4

Figure 8

§ In damp or very humid areas, or next to bathrooms with 

showers.  The moisture in humid air can enter the sensing 

chamber as water vapor, then cool and condense into 
droplets that cause a nuisance alarm.  Install alarms at 
least 10 feet (3 meters) away from bathrooms.

§ In very cold or very hot environments, or in unheated 

buildings or outdoor rooms, where the temperature can 
go below or above the operating range of the alarm.  

Temperature limits for proper operation are 40° to 100°F 
(4.4° to 37.8°C).

§ In very dusty or dirty areas. Dust and dirt can build up 

on the alarm's sensing chamber and can make it overly 
sensitive, or block openings to the sensing chamber and 
keep the alarm from sensing smoke.

§ Near fresh air inlets or returns or excessively drafty 

areas.  Air conditioners, heaters, fans, and fresh air intakes 
and returns can drive smoke away from smoke alarms, 
making the alarms less effective.

§ In dead air spaces at the top of a peaked roof or in the 

corners between ceilings and walls. Dead air may 
prevent smoke from reaching an alarm.  

§ In insect-infested areas.  If insects enter an alarm's sensing 

chamber, they may cause a nuisance alarm.  Get rid of the 
bugs before installing alarms where bugs are a problem.