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2424AT Datasheet(PDF) 3 Page - Systemsensor advanced ideas.

Part # 2424AT
Description  Direct Wire Photoelectronic with Fixed Heat Smoke Detectors
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Manufacturer  SYSTEMSENSOR [Systemsensor advanced ideas.]
Direct Link  http://www.systemsensor.com
Logo SYSTEMSENSOR - Systemsensor advanced ideas.

2424AT Datasheet(HTML) 3 Page - Systemsensor advanced ideas.

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D400-04-00
3
I56-288-05
CAUTION
Dust covers are an effective way to limit the entry of dust
into smoke detector sensing chambers. However, they may
not completely prevent airborne dust particles from
entering the detector. Therefore, System Sensor recom-
mends
the
removal
of
detectors
before
beginning
construction or other dust producing activity. Be sure to
remove dust covers from any sensors that were left in place
during construction as part of returning the system to
service.
TESTING
NOTE: Before testing, notify the proper authorities that
the smoke detector system is undergoing mainte-
nance, and therefore will temporarily be out of
service. Disable the zone or system undergoing
maintenance to prevent unwanted alarms.
Detectors must be tested after installation and periodic
maintenance. The 2412AT, 2424AT or 2424AIT may be
tested in the following ways:
NOTE: Before testing the detector check for the presence
of the flashing LED. If it does not flash, power has
been lost to the detector (check the wiring), or it is
defective
(return
for
repair,
see
Warranty
information).
A. Recessed Test Switch
1. Push and hold the recessed test switch with a .1 inch
maximum diameter tool.
2. The LED should latch within 5 seconds indicating
alarm and annunciating the panel. The horn should
also sound.
B. Calibrated Test Card (System Sensor No. R59-18-00)
1. Remove the detector cover by placing a small bladed
screwdriver in the side slot of the detector cover,
twisting it slightly until the cover can be turned
counterclockwise for removal.
2. Insert the NO ALARM end of the test card fully into
the
test
slot
(see
Figure
6)
then
slide
it
counterclockwise until it stops.
4
5
4
5
SUGGESTED
EOL
RESISTOR
UL LISTED
TWO OR FOUR
WIRE PANEL
INITIATING
LOOP
+
Figure 4. Additional wiring needed for the isolated thermal unit of the 2424AIT detector thermal units are
wired to a separate loop:
A78-1392-01
TEST MODULE
SOCKET
LED
RECESSED TEST
SWITCH
PUSH RECESSED SWITCH WITH
A .1" MAX. DIAMETER TOOL
Figure 5. Bottom and side views showing position of
test switch:
1410-00
3. The detector should not alarm (wait at least 20
seconds).
4. Remove the test card by sliding it clockwise before
removing, then repeat with the ALARM end of test
card.
5. The LED should latch on within 20 seconds indicating
alarm and annunciating the panel.
6. Put the cover back by gently rotating it clockwise
until it locks in place.
C. Test Module (System Sensor Model No. MOD400R)
The MOD400R is used with an analog or digital
voltmeter to check the detector sensitivity as described
in the test module’s manual.
D. Aerosol Generator (GEMINI 501)
Set the generator to represent 4%/ft. to 5%/ft.
obscuration as described in the Gemini 501 manual.
Using the bowl shaped applicator, apply aerosol until
unit alarms.
E. Direct Heat Method (Hair dryer of 1000–1500 watts)
Direct the heat toward the bi-metallic collector. Hold the
heat source about 12 inches from the detector in order to
avoid damage to the plastic. When the heat rises to
greater than 135
° F, the detector should latch in alarm.
The detector will reset only after it has had sufficient
time to cool and the power source has been momentarily
interrupted.
Notify the proper authorities tht the system is back on line.


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