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CO, Smoke/CO Combination, heat, etc.). This Smoke/CO
combination alarm must be counted as a smoke alarm
when determining the number of units on an intercon-
nect line. With 18 alarms interconnected, it is still possible
to interconnect up to a total of 6 remote signaling
devices and /or relay modules (see page 15 for details on
interconnecting Kidde devices).
• The maximum wire run distance between the first and last
unit in an interconnected system is 1000 feet.
• Figure 3 illustrates interconnection wiring. Improper con-
nection may 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) available at all
electrical supply stores and most hardware stores
12
Operating and Installation Instructions
FUSE OR CIRCUIT BREAKER
RED
BLACK
W
HITE
BLACK
WHITE
RED
CONNECTOR
CONNECTOR
First
Alarm
Additional
Alarm
K
idde
Relay Module
SM120X
A
dditional
Alarm
O
ptional Accessory
WIRES ON ALARM HARNESS CONNECTED TO
Black Hot side of AC line
White Neutral side of AC line
Red Interconnect lines (red wires) of other
units in the multiple station set up
Step 3 Mounting Instructions
CAUTION: YOUR SMOKE/CO ALARM IS SEALED AND
THE COVER IS NOT REMOVABLE!
1. To help identify the date to replace the unit, a label has
been affixed to the side of the alarm. Write the “Replace
by” date (7 years from initial power up) in permanent
marker on the label. See Alarm Replacement section for
additional information.
FIGURE 3 Interconnect Wiring Diagram