D400-29-00
3
I56-580-04R
B. Test Module (System Sensor Model No. MOD400 or
MOD400R)
The MOD400 or MOD400R is used with a DMM or volt
meter to check the detector sensitivity as described in
the module’s manual.
C. Direct Heat Method (Hair dryer of 1000 - 1500 watts)
From the side of the detector, direct the heat toward the
sensor. Hold the heat source about 15 cm away to pre-
vent damage to the cover during testing.
NOTE:
If a detector goes into alarm, it will reset only if the
detector has cooled and if its power is momentari-
ly interrupted. Check the control panel being used
to determine whether the RESET switch (or some
other auxiliary device or control) momentarily cuts
off power to the detector loop.
Detectors that fail these tests should be cleaned as
described under MAINTENANCE and retested. If the detec-
tors still fail these tests they should be returned for repair.
Maintenance
The 5451 detector has been designed to be as maintenance-
free as possible. Normal air-borne dust, however, can accu-
mulate on the detector’s sensing elements and cause them
to become less sensitive. All detectors should be tested and
cleaned at least once a year, and those in dustier areas
should be tested and cleaned more often. Detectors must
also be cleaned and tested immediately after a fire.
Before cleaning, notify the proper authorities that the sys-
tem is undergoing maintenance and therefore the system
will temporarily be out of service. Disable the loop or sys-
tem undergoing maintenance to prevent unwanted alarms.
1. Remove detector from mounting base.
2. Use a vacuum cleaner to remove dust from the sensing
chamber.
3. Reinstall the detector.
4. Test detector as described under TESTING.
