2. Installation
Mounting
CAUTION: This unit is sealed. The cover is not removable!
•  Pull the AC Quick-Connect wire harness through the centre hole 
in the mounting plate and secure the plate, making sure that 
the mounting screws are positioned in the small ends of the 
keyholes before tightening (Image 4A).
•  (For models i12040ACA and P121040CA) Press the battery 
reminder tab down into the battery compartment while 
inserting the battery (Image 4C).
CAUTION: If the battery reminder tab is not held down in the battery 
compartment by the battery, the battery door will not close and the 
unit will not attach to the mounting plate.
•  Plug the AC Quick-Connect wire harness into the back of the 
alarm (Image 5), making sure that the locks on the connector 
snap into place. Push the excess wire back into the electrical box 
through the hole in the center of the mounting plate.
 
•  Alignment marks are provided on the edge of the mounting plate and 
the alarm. After installing the mounting plate, place the alarm onto the 
mounting plate, making sure the alignment marks are lined up. Twist 
the alarm in the direction indicated by the “ON” arrow on the alarm 
cover (Image 4B) until it locks in place.
IMAGE 5
ATTACHING THE AC QUICK-
CONNECT WIRE HARNESS