To Install Combination Unit as a Replacement

Installing AC/DC Combination Alarms as Replacements with Existing Interconnected Firex Alarms

Model FADCQ combination alarms are designed to be used as replacement units for all Firex AC and AC/DC smoke alarms with a low voltage interconnect line. These models include G, GC, H, AD, ADC, and FADC. All models listed use a

3-wire interconnect system. To interconnect with other models, please call our free technical support line at (800) 445-8299.

IMPORTANT! READ BEFORE INSTALLING

THIS SMOKE AND CO ALARM WITH EXISTING

INTERCONNECTED FIREX ALARMS

In residential homes, there are two ways smoke and CO alarms are hardwire installed and inter- connected. One uses 4 wires, the other uses 3 wires.

The Model FADCQ smoke and CO alarm 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 sys- tem to a 3-wire by connecting the independant 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 CO alarms on the new 3-wire system with COQ-8 CO alarms or FADCQ com- bination alarms. These alarms can discriminate between signals coming from a smoke alarm and signals coming from a CO alarm. Older model CO models 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 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 con- nector to household wiring. Be certain not to cross the wiring.

5.Connect wire connector to back of combina- tion alarm.

6.If mounting bracket is the same, reattach combo 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 combination alarm. See “TESTING THE COMBINATION ALARM.”

9.Activate the battery. Remove arrow tab and close battery door. The combination alarm will beep briefly and the RED light will flash as door is closed.