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• A maximum of 24 Kidde and/or FireX devices may be interconnected in a mul-
tiple station arrangement. The interconnect system should not exceed the
NFPA interconnect limit of 12 smoke alarms and/or 18 alarms total (smoke,
heat, carbon monoxide, etc.). With 18 alarms interconnected, it is still possi-
ble to interconnect up to a total of 6 remote signaling devices and/or relay
modules.
• When mixing models which have battery backup (i12040, i12060, i12080,
i4618, 1275, 1276, 1285, 1296, PE120, PI2000, KN-COSM-IB, RF-SM-ACDC,
HD135F, KN-COB-IC, KN-COP-IC) with models without battery backup, (i1220,
1235, KN-COSM-I, KN-COB-ICB, KN-COP-ICB, 120X, SM120X,CO120X,
SL177i) be advised that the models without battery backup will not respond
during an AC power failure.
• For more information about compatible interconnect units and their function-
ality in an interconnect system, visit our web site at: www.Kidde.com
• The maximum wire run distance between the first and last unit in an intercon-
nected system is 1000 feet.
• Figure 5 illustrates interconnection wiring. Improper connection will result in
damage to the alarm, failure to operate, or a shock hazard.
• Make certain alarms are wired to a continuous (non-switched) power line.
NOTE: Use standard UL listed household wire (as required by local codes) avail-
able at all electrical supply stores and most hardware stores.
FUSE OR CIRCUIT BREAKER
BLACK
RED
WHITE
CONNECTOR
First
Alarm
FIGURE 5 INTERCONNECT WIRING DIAGRAM
WIRES ON ALARM HARNESS
Black
White
Red
Additional
Alarm
CONNECTED TO
Hot Side of A.C. Line
Neutral Side of A.C. Line
Interconnect Lines (Red Wires) of Other
Units in the Multiple Station Set up
Kidde
Relay Module
SM120X
Optional Accessory
BLACK
RED
WHITE
CONNECTOR
Additional
Alarm
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Do you have a question about the i4618 Series and is the answer not in the manual?
Questions and answers
how do i replace the i4618 with a newer version smoke detector
To replace the Firex i4618 Series smoke detector with a newer version, follow these steps:
1. Turn Off Power: Switch off the circuit breaker supplying power to the smoke detector.
2. Remove the Old Detector: Twist the smoke alarm counterclockwise to detach it from the mounting plate.
3. Disconnect Wires: Unplug the wiring harness from the back of the old alarm.
4. Install the New Mounting Plate (if needed): If the new model has a different mounting plate, remove the old one and install the new plate using screws.
5. Connect Wiring Harness: Attach the wiring harness from the new smoke detector to the existing wires in the ceiling.
6. Attach the New Detector: Align the new smoke alarm with the mounting plate and twist it clockwise to secure it.
7. Insert Battery: If the new model has a battery backup, insert a fresh battery.
8. Turn On Power: Restore power at the circuit breaker.
9. Test the Alarm: Press the test button to ensure the new smoke detector is functioning properly.
Always refer to the user manual of the new smoke detector for specific installation instructions.
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