DO NOT TAMPER WITH WIRES WHEN POWER IS ON!
For alarms that are used as single smoke alarms, do not connect the yellow wire to anything.
Insulate this wire (tape it) in place to make certain the yellow wire cannot contact any metal
parts.
IINTERCONNECTION & COMPATIBILITY: Interconnected alarms can provide earlier
warning of fire than stand-alone alarms, especially if a fire starts in a remote area of the
dwelling. When alarms are interconnected, all alarms will sound when the initiating alarm
sounds, providing more time to escape safely. This alarm may be interconnected with a
total of not more than 24 interconnected devices, i.e., as many as 11 other USI ELECTRIC or
UNIVERSAL brand model smoke alarms or combination smoke and carbon monoxide (CO)
or smoke and carbon monoxide/natural gas alarms; 6 other initiating alarms which may be
a combination of USI ELECTRIC or UNIVERSAL brand CO alarms and heat alarms; and six
other non-initiating devices such as USI ELECTRIC brand relay modules.
This alarm can be interconnected with the following compatible models: MDSCN111,
MICN109, MCN108, USI-1103, USI-1203, USI-1204, USI-1208, USI-1209, USI-1213, USI-5204,
USI-3204, USI-7795, 5304, MI106, MDS107, MP117, USI-2430, USI-960, MI106S, MIC1509S,
MPC122S, MP116S, SLW127, AMIC1510S, AMI1061S.
When any one of these interconnected models alarms it will trigger the corresponding
alarm within the interconnected system with respect to their sensing capabilities. Natural
gas detection is only present in models MDSCN111, MICN109 and MCN108, therefore a
natural gas alarm will NOT trigger the alarm of non-natural gas sensing models within an
interconnected system.
The following alarms cannot reset units on an interconnected system: USI-7795.
The following alarms can trigger Quick Find
®
Alarm Origination, but will not indicate Alarm
Origination on an interconnected system: USI-1103, USI-1203, USI-1204, USI-1208 Part USI-
1209, USI-1213, USI-5204, USI-3204, USI-7795, USI-2430.
The following alarms cannot be reset through an interconnected system: USI-1103, USI-1203,
USI-1204, USI-1208 Part #USI-1209, USI-1213, USI-3204, USI-2430 and USI-7795.
Interconnected CO alarms or CO alarm circuit of combination smoke and CO alarms will only
respond if a CO alarm / event initiates the alarm. All other alarms remain silent.
Interconnected smoke alarms, heat alarms and relay modules will only respond if a smoke
alarm / event or heat alarm / event initiates the alarm. All CO alarms remain silent.
Note that alarms without battery backup will not respond during an AC power failure.
NOTE: Relay Modules USI-960 will not respond if a CO alarm / event initiates the alarm.
TO DEACTIVATE THE LOCKING FEATURE:
To remove the smoke alarm for cleaning or servicing,
you must first remove the locking pin, if it has been installed.
1. Turn off AC power to the circuit.
2. Use long nose pliers to pull the locking pin out of the hole.
3. It is now possible to remove the smoke alarm.
WIRING INSTRUCTIONS:
1. a. The appropriate power supply is 120 Volt single phase power supplied from a non-
switchable circuit NOT protected by a ground fault circuit interrupter.
b. Turn off AC power to the circuit before wiring the smoke alarm.
c. There are three pigtail wires (black, white and yellow) coming from the AC QUICK
CONNECTOR. The proper wire connection is as follows:
WIRES FROM QUICK CONNECTOR
CONNECT TO
BLACK
"HOT" side of AC line
WHITE
"NEUTRAL" side of AC line
YELLOW
Interconnect wires of other smoke alarms
Page 5
2. Insert the alarm locking pin into the hole as shown. Refer to the diagram below for correct
placement.
INSERT ALARM
LOCKING PIN
HERE
