System Sensor 2112_24B and 2112_24TB Photoelectronic - Manual (Page 3)

D200-62-00 3 I56-932-01
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 en-
tering the detector. Therefore, System Sensor recommends
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 maintenance
and will be temporarily out of service. Disable the
zone or system undergoing maintenance to prevent
unwanted alarms.
Detectors must be tested after installation and following
periodic maintenance. Test the 2112/24 as follows:
A. Test Switch
1. A recessed test switch is located on the detector hous-
ing (See Figure 4).
2. Press and hold the recessed test switch with a 0.1
inch maximum diameter tool such as an allen wrench
or small screwdriver.
3. The detector’s LED should light within 5 seconds.
Figure 3. Wiring diagram for the 2112/24B and 2112/24TB detector:
D O
N O T
P A IN T
LED
RECESSED TEST
SWITCH
TEST MODULE
SOCKET
PUSH RECESSED
SWITCH WITH A
0.1" MAX. DIAMETER TOOL
P
W
R
OPTIONAL CLASS A WIRING
EOL RESISTOR
SPECIFIED BY
PANEL
MANUFACTURER
EOL POWER
SUPERVISION
RELAY (SHOWN
ENERGIZED)
A77-716 12/24V
POWER
TO
DETECTORS
UL LISTED
CONTROL
PANEL
INITIATING
LOOP
+
+
P
W
R
+
+
N.O.
C
+
+
N.O.
C
Figure 4. Top and side views showing position of test switch:
A78-2336-01
B. Test Module (System Sensor Model No. MOD400R).
The MOD400R test module can be used with a DMM
or analog voltmeter to check the detector sensitivity as
described in the test module’s manual.
C. Smoke Entry Test
Hold a smoldering punk stick or cotton wick at the side
of the detector and gently blow smoke through the de-
tector until the unit alarms.
D. Direct Heat Method (Model 2112/24TB only – Hair dryer
of 1000-1500 watts).
Direct the heat toward either of the side thermistors.
Hold the heat source about 12 inches from the detector
in order to avoid damage to the plastic. The detector will
reset only after it has had sufficient time to cool and the
power source has been momentarily interrupted.
Both smoke and heat detection testing are recommended
for verifying system protection capability.
A detector that fails to activate with any of the above tests
should first be cleaned as outlined in MAINTENANCE. If
the detector still fails to activate, return it for repair.
Notify the proper authorities the system is back in
operation.
A78-2564-00