First Alert SC9120B user manual Special Requirements for Interconnected Alarms, During an Alarm

INSTALLATION, Continued

SPECIAL REQUIREMENTS FOR INTERCONNECTED ALARMS

•Failure to meet any of the above requirements could damage the units and cause them to malfunction, removing your protection.

•AC and AC/DC Smoke/CO Alarms can be interconnected. Under AC power, all units will alarm when one senses smoke or CO. When power is interrupted, only the AC/DC units in the series will continue to send and receive signals.

AC powered Smoke/CO Alarms will not operate. See “Smart Interconnect” Feature.

Interconnected units can provide earlier warning of a Smoke/CO problem than stand-alone units, especially if the problem starts in a remote area of the dwelling. If any unit in the series senses Smoke/CO, all units will alarm. To determine which Smoke/CO Alarm initiated an alarm, refer to the table.

During an Alarm:

On Initiating Alarm(s) – Red LED(s) flashes (flash) rapidly

On All Other Alarms – Red LED is Off

After an Alarm (Latching):

On Initiating Alarm(s) – Green LED(s) On, Red LED(s) flash once every 5 seconds

On All Other Alarms – Green LED(s) On, Red LED(s) is Off

Compatible Interconnected Units

Interconnect units within a single family residence only. Otherwise all households will experience unwanted alarms when you test any unit in the series. Interconnected units will only work if they are wired to compatible units and all requirements are met. This unit is designed to be compatible with: BRK Electronics® Smoke Alarm Models 9120, 9120B, 7010, 7010B, 7020B, 4120, 4120B, 4120SB, 4919, 2002RAC, 100S, 5919, 5919TH; BRK Electronics® Heat Alarm Models HD6135F, HD6135FB; BRK Electronics® CO Alarm Models CO5120BN, CO5120PDBN; Smoke/CO Alarm Model SC6120B, SC9120B; and First Alert® Smoke Alarm Models SA4120, SA4120B, SA4121B, SA4919B, SA100B, SC7010B, SC7010BV; Accessory devices models RM3, RM4, SL177.

Interconnected units must meet ALL of the following requirements:

•A maximum of 18 compatible BRK Electronics® Smoke, Heat or CO Alarms may be interconnected. No more than 12 of the 18 can be Smoke Alarms per NFPA 72.

•The same fuse or circuit breaker must power all interconnected units.

•The total length of wire interconnecting the units should be less than 1000 feet (300 meters). This type of wire is commonly available at Hardware and Electrical Supply stores.

•All wiring must conform to all local electrical codes and NFPA 70 of the National Electrical Code. Refer to NFPA 72, NFPA 101, and/or your local building code for further connection requirements.

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	A. Unswitched 120VAC		B. To Additional Alarms,
	60 Hz source		Maximum = 18 Alarms
1.	Smoke/CO Alarm	4.	Wire Nut	7. Interconnect Wire
2.	Ceiling or Wall	5.	Junction Box	(Orange)
3.	Power Connector	6. Neutral Wire (White)		8. Hot Wire (Black)

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