System Sensor DH500ACDC - Manual (Page 8)

B. RTS451/RTS451KEY Remote Test Station
The RTS451/RTS451KEY Remote Test Station facilitates
testing of the duct detector alarm capability. The
DH500ACDC duct detector cannot be reset by the
RTS451/RTS451KEY. It must be reset at the system con-
trol panel.
To install the RTS451/RTS451KEY test coil, connect the
device as shown in Figure 9. Place the coil in the detector
housing with the arrow facing up and pointing toward the
detector as in Figure 9. Attach the coil leads to the housing
terminals as shown; polarity is not important. Firmly screw
the test coil mounting bracket in place over the test coil.
The resistance of the wire connecting the remote test sta-
tion to the duct detector must be less than 25 ohms.
TEST
LOCATOR
TEST
MAGNET
PAINTED SIDE
TOWARD HOUSING
DUCT
HOUSING
DETECTOR
HEAD
TWIST
COUNTERCLOCKWISE
TO REMOVE
DUCT
HOUSING
TWIST
CLOCKWISE
TO INSTALL
DETECTOR
HEAD
Figure 7. Testing detector alarm: Figure 8. Detector head removal:
A78-2453-00 A78-2452-00
DETECTOR
HEAD
TEST COIL
Figure 9. RTS451/RTS451KEY Test Coil Installation:
A78-1994-02
7.3 MOD400R Sensitivity Test
After verification of alarm capability, use a MOD400R test
module with a voltmeter to check detector sensitivity as
described in the MOD400R installation manual. The hous-
ing cover must be removed to perform this test.
If the MOD400R readings indicate that the sensor head is
outside of the acceptable range, the sensor heads require
cleaning (refer to Periodic Maintenance Requirements).
7.4 Trouble Test
The capability of trouble detection is tested by removing
the detector head from the duct housing. The detector head
is removed by rotating it counterclockwise about 10
degrees (Figure 8). The system control panel should indi-
cate a trouble condition. Reinstalling the detector head
should clear the trouble condition.
D500-07-00 8 I56-432-11R