5
8.
Model FADCM AC/DC alarm only: Activate the battery.
Remove arrow tab and
close battery door. The yellow light will flash as door
is closed.
DANGER
ELECTRICAL SHOCK HAZARD. Turn off power at the main fuse box or
circuit breaker by removing the fuse or switching the circuit breaker to the OFF
position.
WARNING
This Smoke/CO alarm should be installed only by a qualified electrician. Carbon
Monoxide alarm installation must be in accordance with the requirements of
Article 760 of the National Electrical Code and any local codes that may apply.
• Use #18 AWG minimum solid or stranded wire. When interconnecting, maximum
wire length between any two is 1,500 feet for #18 AWG or 4,000 feet for #14 AWG
(20 OHMS loop resistance).
• This combination alarm may be interconnected with as many as 11 other Firex
model COE, COEA, FADCM, FADCM-B, GCM, FADC, TPCI, AD, ADC, PAD, FPAD,
G, GC, or PG40 smoke alarms, and as many as 6 Firex model ADH heat alarms
and/or CO alarms for a total of not more than 18 interconnected devices.
•
It is important to note that this smoke/CO combination alarm IS NOT com-
patible with models FADCQ and COQ8. If more than one model FADCQ, or
more than one model COQ8, is in your home, all must be replaced in order to
achieve a fully operational interconnected system. If models FADCQ and
COQ8 are interconnected with this combination alarm, they will operate as if
they were single station stand-alone alarms, thus eliminating the benefits and
additional protection of an interconnected system.
Models FADCQ and COQ8 are still compatible with all existing Firex AC and
AC/DC smoke alarms.
• You may use the multiple station interconnected features of your FADCM even if
powered only by a battery. We recommend that you check with your local code
enforcement bureau before mixing interconnected alarm devices that may be
normally operating both with and without AC power.
• This alarm can share the interconnect wire of smoke and heat alarms. The alarm
will automatically sound a smoke alarm signal if smoke is detected by this unit or
any other interconnected smoke alarm, even if the unit is already detecting carbon
monoxide and sounding the carbon monoxide alarm signal..
WARNING
WHILE AC AND AC/DC SMOKE, CO AND HEAT ALARMS CAN BE INTERCON-
NECTED, ONLY WHEN AC POWER IS ACTIVE WILL ALL UNITS ALARM WHEN
ONE UNIT SENSES A HAZARDOUS CONDITION. WHEN AC POWER IS DISCON-
NECTED, INTERRUPTED OR NOT PRESENT FOR ANY REASON, ONLY AC/DC
UNITS WILL CONTINUE TO SEND AND RECEIVE SIGNALS AND SOUND AN
ALARM IN RESPONSE TO THE PRESENCE OF SMOKE, CO, OR HEAT, AS
DETERMINED BY THE MODEL OF ALARM THAT IS PRESENT. WHEN POWER IS
DISCONNECTED, INTERRUPTED OR NOT PRESENT FOR ANY REASON, AC
POWERED SMOKE, CO, OR HEAT ALARMS WILL NOT OPERATE.
THIS ALARM SHOULD BE INSTALLED IN ACCORDANCE WITH THE NATIONAL
FIRE PROTECTION ASSOCIATION’S STANDARD 72 (National Fire Protection
Association, One Batterymarch Park, Quincy, MA 02269).
• Connect CO and smoke alarms to a single dedicated AC branch circuit. If local
codes do not permit such a wiring configuration or connection, be sure the neutral
wire is common to both circuits or phases.
Installing AC/DC Smoke/CO Alarms as Replacements
with Interconnected Legacy Firex Alarms
Model FADCM and GCM combination alarms are designed to be used as replace-
ment units for most Firex AC and AC/DC smoke alarms with a low voltage intercon-
nect line. These models include G, GC, H, AD, ADC, and FADC. All models listed use
a 3-wire interconnect system. To interconnect with other Firex models, please call our
free technical support line at (800) 445-8299.
IMPORTANT! READ BEFORE INSTALLING THIS SMOKE/CO ALARM WITH
EXISTING INTERCONNECTED FIREX ALARMS
In residential homes, there are two ways smoke and Smoke/CO alarms are hardwire
installed and interconnected. One uses 4 wires, the other uses 3 wires. The model
FADCM and GCM alarms can be used with both 4 and 3 wire systems.
1. Identify whether the installed system uses 3 or 4 wires to interconnect.
2. If a 4-wire system is installed, change the system to a 3-wire by connecting the
independent interconnect wires (yellow and blue) at any point in the system.
3. Smoke alarms generally don’t require any changes (other than replacement every
ten years).
4. Replace older Smoke/CO alarms on the new 3-wire system with FADCM and GCM
Smoke/CO alarms. These alarms can discriminate between signals coming from a
smoke alarm and signals coming from a CO alarm. Older model Smoke/CO alarms
converted to 3-wire cannot. So when any alarm is triggered, all the older CO
alarms will sound, creating confusion about which danger is actually present.
To Install a Combination Unit as a Replacement:
1. Turn off AC power at circuit breaker or main fuse box.
2. Remove old alarm from mounting bracket.
3. Disconnect wire connector from back of unit.
4. Remove wire nuts and connect new wire connector to household wiring. Be cer-
tain not to cross the wiring.
5. Connect wire connector to back of alarm.
6. If mounting bracket is the same, reattach alarm to mounting bracket. Feed wiring
back through hole in mounting surface.
7. Turn on power at main fuse box or circuit breaker.
8. Test Smoke/CO alarm. See “TESTING THE SMOKE/CO ALARM.”
9.
Model FADCM AC/DC model only: Activate the battery.
Remove arrow tab and
close battery yellow light will flash as door is closed.
CAUTION
Do not use super glue or silicon caulk on or near the alarm! Fumes from
these products can coat and permanently damage the sensor.
Interconnecting AC Only and AC/DC Alarms
Models FADCM and GCM
