System Sensor DH400ACDCP - Manual (Page 9)

To install the RTS451/RTS451KEY, connect the device as
shown in Figure 8; wire runs must be limited to 25 ohms or
less per interconnecting wire. Place the coil in the detector
housing with the arrow facing up and pointing toward the
detector as in Figure 12. Attach the coil leads to the hous-
ing terminals as shown; polarity is not important. Firmly
screw the bracket in place over the test coil.
[6.2.3] Sensitivity Tests
[6.2.3.1] MOD400R Sensitivity Test
After verification of alarm capability, use the MOD400R test
module with a voltmeter to check detector sensitivity as
described in the test module’s manual. The housing cover
must be removed to perform this test.
If test module readings indicate that the detector head is
outside of the acceptable range that is printed on the back
of the detector head, the detector head requires cleaning
per Section [7].
[6.2.3.2] R59-18-00 CALIBRATED TEST CARD (photo-
electronic units only)
After verification of alarm capability, the R59-18-00 test
card may be used to verify correct sensitivity of the de-
tector head.
1. Remove the duct housing cover.
2. Remove the detector head from the housing as shown
in Figure 11.
3. Remove the detector head cover by placing a small
blade screwdriver in the side slot of the detector
cover, twisting it slightly until the cover can be turned
counterclockwise.
Figure 10. Testing detector alarm: Figure 11. Detector head removal:
TEST
LOCATOR
TEST
MAGNET
PAINTED SIDE
TOWARD HOUSING
DUCT
HOUSING
DETECTOR
HEAD
RESET
LOCATOR
TWIST
COUNTERCLOCKWISE
TO REMOVE
DUCT
HOUSING
TWIST
CLOCKWISE
TO INSTALL
DETECTOR
HEAD
H0530-00 H0531-00
4. Carefully reinsert the detector head into the duct hous-
ing and wait 50 seconds for power up. Do not hold the
swirl chamber to twist the detector head.
5. Insert the NO ALARM end of the test card into the test
slot (see Figure 13) and slide it counterclockwise until it
stops. The detector should not alarm after 20 seconds.
6. Remove the card and then insert the ALARM end into
the slot and slide it counterclockwise until it stops. The
LEDs should latch on within 20 seconds. Remove card
and reset detector.
7. Put the cover back by gently rotating it clockwise until
it locks in place. Secure the duct housing cover using
the 4 cover screws.
[7] Detector Cleaning Procedures
Notify the proper authorities that the smoke detector sys-
tem is undergoing maintenance, and that the system will
be temporarily out of service. Disable the zone or system
undergoing maintenance to prevent unwanted alarms and
possible dispatch of the fire department.
[7.1] Air Filters
1. Turn off power to the system.
2. Remove and inspect the sampling tube filters.
3. If the filters are heavily coated with dirt, replace them
with new filters. If they are not heavily coated, use a
vacuum cleaner or compressed air nozzle to remove
dust, then reinstall the filters.
D400-13-00 9 I56-0555-010R