User guide
D400-08-00  4   I56-280-05R
 ©2004 System Sensor
System Sensor warrants  its enclosed smoke detector to  be free  from 
defects in materials and workmanship under normal use and service for a 
period of three years from date of manufacture. System Sensor makes no 
other express warranty for this smoke detector. No agent, representative, 
dealer, or employee of the Company has the authority to increase or alter 
the  obligations  or  limitations  of  this  Warranty.  The  Company’s  obliga-
tion of this Warranty shall be limited to the repair or replacement of any 
part of the smoke detector which is found to be defective in materials or 
workmanship under normal use and service during the three year period 
commencing with the date of manufacture. After phoning System Sensor’s 
toll  free  number  800-SENSOR2 (736-7672)  for  a  Return  Authorization 
number,  send  defective units  postage  prepaid to:  System  Sensor, Repair 
Figure 5. Removal of cover and screen for cleaning:
LOCK PRONG
REMOVABLE SCREEN
(P/N RS14)
REMOVABLE 
COVER
FOR
CLEANING 
SENSING CHAMBER
Maintenance
NOTE: Before  starting,  notify  the  proper  authorities  that 
the  smoke  detector system  is undergoing  main-
tenance,  and  therefore will  temporarily  be  out  of 
service. Disable  the  zone  or system  undergoing 
maintenance to prevent unwanted alarms. 
The 1412 and 1424 are cleaned as follows:
1. Remove  the  detector  screen and  cover  assembly  by 
depressing the three lock prongs on the top of the cover, 
rotate  the  cover  counterclockwise,  and  pull  the  screen 
and cover assembly away from the detector (see Figure 
5). Usage of System Sensor CRT400 cover removal tool 
is recommended.
2. Remove the screen from the cover.
3. Use a vacuum cleaner to remove dust from the screen, 
the cover, and the sensing chamber.
4. After cleaning, snap the screen into the cover, then place 
the cover and screen assembly on the detector, turning 
clockwise until it is locked in place.
5. Test detector as described under TESTING.
6. Notify the proper authorities that the system is back on 
line.
S0138-00
Please refer to insert for the Limitations of Fire Alarm Systems
Three-Year Limited Warranty
Department, RA #__________, 3825 Ohio Avenue,  St.  Charles, IL 60174. 
Please  include  a  note  describing  the  malfunction  and  suspected  cause 
of failure. The Company shall not be obligated to repair or replace units 
which  are  found  to  be  defective  because  of  damage,  unreasonable use, 
modifications, or  alterations occurring  after the  date  of  manufacture.  In 
no case shall the Company be liable for any consequential or incidental 
damages for  breach of this  or  any other  Warranty,  expressed or implied 
whatsoever, even if the loss or damage is caused by the Company’s neg-
ligence or  fault.  Some  states  do  not  allow the exclusion or limitation of 
incidental or consequential damages, so the above limitation or exclusion 
may not apply to you. This Warranty gives you specific legal rights, and 
you may also have other rights which vary from state to state.




