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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 detec-
tor. 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 obligation 
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: Honeywell, 12220 Rojas 

Drive, Suite 700, El Paso TX 79936, USA. Please include a note describing the malfunc-
tion 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 negligence 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.

THREE-YEAR LIMITED WARRANTY

Please refer to insert for the Limitations of Fire Alarm Systems

FCC STATEMENT

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must 
accept any interference received, including interference that may cause undesired operation.
Note: 

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide 

reasonable  protection against harmful interference in a residential installation. This equipment generates,  uses and can radiate radio frequency energy and, if not installed and used 
in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular instal-
lation.  If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to 
try to correct the interference by one or more of the following measures:
 

 

– Reorient or relocate the receiving antenna.

 

 

– Increase the separation between the equipment and receiver.

 

 

– Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

 

 

– Consult the dealer or an experienced radio/TV technician for help.

MAINTENANCE

NOTE: Before performing maintenance on the detector, notify the proper au-
thorities that maintenance is being performed and the system will be tem-
porarily out of service. Disable the zone or system undergoing maintenance 
to prevent any unwanted alarms. Power must be removed from the detector 
before performing maintenance of any kind.
1.  Remove the detector cover by turning counterclockwise. (See Figure 6.)
2.  Vacuum the cover or use canned air to remove any dust or debris.
3.   Remove the top half of the screen/sensing chamber by lifting straight up 

(Figure 5).

4.   Vacuum or use canned air to remove any dust or particles that are pres-

ent on both chamber halves.

5.   Replace the top half of the screen/sensing chamber by aligning the arrow 

on the screen/sensing chamber with the arrow on the housing. Press 
down firmly until the screen/sensing chamber is fully seated. 

6.   Replace the detector cover by placing it over the screen/sensing chamber 

and turning it clockwise until it snaps into place.

7.  Reinstall the detector and test. (See the Testing section.)
8.  Notify the proper authorities when the system is back in service.

FIGURE 5: REMOVING/REPLACING SCREEN/SENSING CHAMBER

REMOVABLE
DETECTOR
COVER

SCREEN/SENSING
CHAMBER
(TOP HALF)

DETECTOR
HOUSING

S0136-00

i

3

 is a trademark of and System Sensor

®

 and Honeywell

®

 are registered trademarks of Honeywell International, Inc.

 

  4 

I56-1800-014 

  

©2017 System Sensor. 02-02

Summary of Contents for 4WT-B

Page 1: ...r to be easily installed or removed The mounting base installation is further simplified by the incorporation of features compatible with drywall fasteners Two LEDs on the detector provide a local visual indication of the detector s status TABLE 1 DETECTOR LED MODES Green LED Red LED Power up Blink 10 sec Blink 10 sec Normal standby Blink 5 sec Out of sensitivity Blink 5 sec Freeze Trouble Blink 1...

Page 2: ...ext to bathrooms with showers In dusty dirty or insect infested areas Near fresh air inlets or returns or excessively drafty areas Air condition ers heaters fans and fresh air intakes and returns can drive smoke away from the detector Consult NFPA 72 the local Authority Having Jurisdiction AHJ and or ap plicable codes for specific information regarding the spacing and placement of smoke detectors ...

Page 3: ... 0 18 max into the test switch opening push and hold 3 If the detector is within the listed sensitivity limits the detector s red LED should light within five seconds FIGURE 4 RECESSED TEST SWITCH OPENING AND SENS RDR POSITION PUSH RECESSED SWITCH WITH A 0 18 MAX DIAMETER TOOL LED RECESSED TEST SWITCH POSITION SENS RDR AT AN ANGLE ON THE OVAL AREA OR AT THE CHAMBER OPENING BY THE WORD PAINT S0135 ...

Page 4: ... Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in ...

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