MOUNTING INSTRUCTIONS
CAUTION: THIS UNIT IS SEALED. THE COVER IS NOT REMOVABLE!
1. Remove the trim ring from the back of the alarm by holding the 
trim ring and twisting the alarm in the direction indicated by the 
“OFF” arrow on the alarm cover.
2. After selecting the proper smoke alarm location as described 
in section 1 and wiring the AC QUICK CONNECT harness as 
described in the WIRING INSTRUCTIONS, attach the trim ring to 
the electrical box (see figure 5).
3. Use a screwdriver to punch out only the pair of holes in the trim 
ring that match your type of electrical box or plaster ring. Mount 
the trim ring to the electrical box, using the appropriate holes.  
NOTE: Use the circle, square and octagon markings near each 
mounting hole in the trim ring to help you select the correct 
mounting holes (see figure 5).
4. Pull the AC QUICK CONNECTOR through the center hole in the 
trim ring and mount the ring, making sure that the mounting 
screws are positioned in the small ends of the keyholes before 
tightening the screws (see figure 5).
5. Plug the AC QUICK CONNECTOR into the back of the alarm (see 
figure 6), making sure that the locks on the connector snap into 
place.  Then push the excess wire back into the electrical box 
through the hole in the center of the trim ring.
6. If you have finished all the WIRING, BATTERY INSTALLATION AND 
TRIM RING MOUNTING STEPS, you can install the alarm on the 
trim ring. Alignment marks are provided on the side of the alarm 
and on the trim ring (see figure 7).
7. Install the alarm on the trim ring with the indicating marks 
aligned and rotate the alarm in the direction of the “ON” arrow 
on the cover until the alarm snaps in place (see figure 7).
8. Turn on the AC power. The green AC Power On Indicator should 
be lit when the alarm is operating from AC power.
FIGURE 5 SELECT CORRECT MOUNTING HOLES ON TRIM RING
Rectangular 
Plaster Ring
Circular 
Plaster Ring
Octagonal
Electrical Box
1375-7213-00(21008164-EN A).indd   71375-7213-00(21008164-EN A).indd   7 2010.10.7   2:06:24 PM2010.10.7   2:06:24 PM