Figure 12. RTS451/RTS451KEY test coil installation:
TEST COIL
DETECTOR
HEAD
the RTS451/RTS451KEY manual. The DH400ACDCP duct detector can be reset by the RTS451/RTS451KEY. If a sys- tem control panel is used, the panel itself may also require resetting.
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
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 counter- clockwise.
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.
[7.2] Photo Heads
1.Remove the detector cover by inserting a small bladed screwdriver into the slot located 90 degrees from the field test port. Rotate the cover counterclockwise to re- move (see Figure 13).
2.Lift the screen from the photo chamber. Vacuum the screen and cover before using clean, compressed air to loosen and blow out any remaining debris. Replacement screens (RS24) are available.
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