System Sensor DH500 - Manual (Page 8)

D500-08-00 8 I56-512-07R
7.3 MOD400 Sensitivity Test
After verification of alarm capability, the MOD400 test
module may be used with a voltmeter to check detector
sensitivity as indicated in the MOD400 installation manual.
The housing cover must be removed to perform this test.
If the MOD400 readings indicate that the detector head is
outside of the acceptable range, the detector head requires
cleaning. (See Periodic Maintenance Requirements on page
9.)
7.4 Trouble Test
The capability of “TROUBLE” detection is tested by remov-
ing the detector head from the duct housing. The detector
head is removed by turning it counterclockwise about 10
degrees (Figure 8). The system control panel should indi-
cate a trouble condition. Reinserting the detector head
should clear the trouble condition.
Step 8. Install the Cover
Install the cover using the four screws. Be certain filters are
installed as specified in Step 6. Make sure that the cover fits
into the base groove and that all gaskets are in their prop-
er positions. Tighten the four cover screws to 10 in/lbs.
Step 9. Perform the Final System Check
Place the magnet in position as shown in Figure 7. The
LEDs on the detector should light. Any accessory LED(s)
will also light. The system control panel should indicate an
alarm condition.
Periodic Maintenance Requirements
Air duct smoke detectors should be maintained at least
once a year. They should be maintained more often if the
detector heads become obviously dirty in less than a year.
The detectors must also be cleaned immediately after a fire.
Failure to properly maintain air duct smoke detectors may
cause unnecessary false alarms.
DETECTOR
HEAD
TEST COIL
A78-1994-01
Figure 9. RTS451/RTS451KEY test coil installation:
It is recommended that a permanent Detector Test Log be
set up and maintained, with a record for each individual
smoke detector in each building. Each detector should be
clearly described, with information on the type of detector,
the model number, the serial number (if any), the location,
and the type of environment. Data entries should include
test dates, type of test mode, test results, maintenance, and
comments. A detector test log is included in this manual.