System Sensor 7251DH - Manual (Page 7)

Recommended Detector Maintenance Procedure
NOTE: Notify the proper authorities that the smoke detector
system is undergoing maintenance, and therefore the system will
temporarily be out of service. Disable the zone or system un-
dergoing maintenance to prevent unwanted alarms and possible
dispatch of the fire department.
1. Turn off power to the system.
2. Remove and inspect sampling tube filters.
3. If filters are heavily coated with dirt, replace them with new
filters. If they are not heavily coated, use a vacuum cleaner or
compressed air nozzle to remove dust, then reinstall the filters.
4. Remove detector from housing (See Figure 8).
TESTING
Before testing, notify the proper authorities that the system is
undergoing maintenance, and will temporarily be out of service.
Disable the system to prevent unwanted alarms.
All sensors must be tested after installation and periodically
thereafter. Testing methods must satisfy the Authority Having
Jurisdiction (AHJ). Sensors offer maximum performance when
tested and maintained in compliance with NFPA 72. The sensor
can be tested in the following ways:
A. Functional: Magnet Test (P/N M02-04-00 or M02-09-00)
This sensor can be functionally tested with a test magnet. The test
magnet electronically simulates smoke in the sensing chamber, test-
ing the sensor electronics and connections to the control panel.
1. Hold the test magnet in the magnet test area as shown in
Figure 7.
2. The sensor should alarm the panel.
Two LEDs on the sensor are controlled by the panel to indicate
sensor status. Coded signals, transmitted from the panel, can
cause the LEDs to blink, latch on, or latch off. Refer to the control
panel technical documentation for sensor LED status operation
and expected delay to alarm.
B. Smoke Entry: Aerosol Generator (Gemini 501)
The Gemini model 501 aerosol generator can be used for smoke
entry testing. Set the generator to represent 4%/ft. to 5%/ft. ob-
scuration as described in the Gemini 501 manual. Using the bowl
shaped applicator, apply aerosol until the panel alarms.
A sensor that fails any of these tests should be cleaned as de-
scribed under CLEANING, and retested. If the sensor fails after
cleaning, it must be replaced and returned for repair.
When testing is complete, restore the system to normal opera-
tion and notify the proper authorities that the system is back
in operation.
SS-400-000 7 I56-3065-000R
CLEANING
It is recommended that the detector be removed from its mount-
ing base to facilitate cleaning. The detector is cleaned as follows:
NOTE: Before removing the detector, notify the proper authorities
that the smoke detector system is undergoing maintenance and
will be temporarily out of service. Disable the zone or system
undergoing maintenance to prevent unwanted alarms.
1. Remove the detector cover by prying away the four side tabs
with a small-bladed screwdriver, and then pulling the cover
from the base.
2. Vacuum the screen carefully without removing it. If further clean-
ing is required continue with Step 3, otherwise skip to Step 7.
3. Remove the screen assembly/chamber cover by pulling it
straight out (see Figure 10).
4. Clean the chamber by vacuuming or blowing out dust and particles.
5. Replace the sensing chamber cover, aligning the arrow on the
top with arrow on the printed circuit board.
6. To replace the screen, place it over the chamber assembly,
turning it until it snaps into place.
7. Replace the cover using the LEDs to align the cover and then
gently pushing it until it locks into place.
8. Reinstall the detector.
9. Test the detector as described in TESTING.
10. Reconnect disabled circuits.
11. Notify the proper authorities that the system is back on line.
LASER SAFETY INFORMATION
This smoke detector does not produce any hazardous laser ra-
diation and is certified as a Class 1 laser product under the U.S.
Department of Health and Human Services (DHHS) Radiation
Performance Standard according to the Radiation Control for
Health and Safety Act of 1968.
Any radiation emitted inside the smoke detector is completely
within the protective housings and external covers. The laser beam
cannot escape from the detector during any phase of operation.
The Center of Devices and Radiological Health (CDRH) of the
U.S. Food and Drug Administration implemented regulations for
laser products on August 2, 1976. These regulations apply to laser
products manufactured after August 1, 1976. Compliance is man-
datory for products marketed in the United States.
Accessories
Part No.
Remote LED RA400ZA
Remote Test Station RTS451/RTS451KEY
Piezo Alert Sounder PA400
Replacement Filters F36-05-00
Magnet M02-04-00
End Plug For Sampling Tube P48-21-00
Installation Kit (Parts bag) A2650-01
Three-Year Limited Warranty
System Sensor warrants its enclosed product 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 the enclosed product. 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 replacement of any part of
the product which is found to be defective in materials or workman-
ship under normal use and service during the three year period com-
mencing 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, Returns
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 replace units which
are found to be defective because of damage, unreasonable use, modi-
fications, 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 limita-
tion 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.
Please refer to insert for the Limitations of Fire Alarm Systems