Sensitivity Testing
NOTE:
Before testing, notify the proper authorities that
the smoke detector system is undergoing mainte-
nance, and therefore the system will be tempo-
rarily out of service. Disable the zone or system
undergoing maintenance to prevent unwanted
alarms.
Detectors must be tested after installation and following
periodic maintenance. The sensitivity of the 6424 may be
tested as follows:
NOTE:
Before testing the detector, check for the presence
of the flashing green LED at the receiver, making
sure not to disturb or block the beam. If it does not
flash and the detector is not in trouble or alarm,
power has been lost to the detector (check the wir-
ing).
A. Calibrated Test Filter
1. Test the detector at the receiver.
2. Use the proper side of the test card depending on the
sensitivity setting (55 or 30) of the detector.
3. Place the NO ALARM section of the test filter over the
receiver lens. The green LED should continue to pulse
and the detector should not alarm after 15 seconds.
4. Place the ALARM section of the test filter over the
lens. The detector should alarm within 15 seconds.
5. The detector can be reset with the local reset, remote
reset, or by momentarily interrupting the power.
6. Notify the proper authorities that the system is back
on line.
Detectors that fail to alarm should be returned for repair.
Units that alarm during the non-alarm test (step 3) should
be cleaned and tested again before being returned. Follow
the maintenance instructions for cleaning.
B. Remote Test Switch
The remote test station, RTS451, can be used with the
6424 beam smoke detector. Follow instructions included
with the test station for proper use. See Figure 9 (Remote
Test Station) for wiring diagram.
If the detector is not in trouble and the unit fails to
alarm, check all related wiring. Once the proper wiring
is confirmed, perform the above calibrated test filter pro-
cedure. If the unit still fails to alarm it should be re-
turned for repair.
Maintenance
NOTE:
Before cleaning the detector lenses, notify the
proper authorities that the smoke detector system
is undergoing maintenance, and therefore the sys-
tem will be temporarily out of service. Disable the
zone or system undergoing maintenance to prevent
unwanted alarms.
1. Carefully clean the lenses of both the receiver and the
transmitter. A damp soft cloth with a mild soap may be
used. Avoid products with solvents or ammonia.
2. After the lenses are clean, switch the receiver to the
align mode. If three and only three alignment LEDs turn
on, slide the align switch back to normal mode and wait
approximately one minute for self calibration. The green
LED should pulse after the calibration time. If more or
fewer LEDs turn on in align mode, see the Beam Align-
ment Instructions on page 9 for realignment.
3. Notify the proper authorities that the system is back on
line.
D400-18-00
11
I56-494-10R
