(+)
(-)
RA400
REMOTE ALARM
LED OPTION
1 PER UNIT
8mA CURRENT DRAW
RA400Z (+)
RA400Z or (-)
RTS451/
RTS451KEY
EXTERNAL
(-) POWER (+)
SUPPLY
*
RTS451/RTS451KEY
REMOTE TEST STATION
LED OPTION
1 PER UNIT
8mA CURRENT DRAW
TEST COIL OPTION
1 PER UNIT
95mA CURRENT DRAW
4
5
3
2
1
Unused
Remote
Test
(+)
(-)
(+)
(+)
(-)
(-)
(+)
RA400Z
RTS451/RTS451KEY
RA400Z or
RTS451/RTS451KEY
Comm.
Line
Comm. Line (+)
Alarm
Initiation
Loop
Comm.
Line (-)
UL Listed
Control Panel
1st
Detector
in Loop
2nd
Detector
in Loop
The RTS451/RTS451KEY test coil circuit requires an external 24VDC
power supply which must be UL listed
*
Figure 5C. System wiring diagram
for duct detectors using a UL listed
control panel.
Figure 5A.
Figure 5B.
Caution:
Filters require periodic cleaning or replacement, depending on the amount of dust and dirt accumulated.
Visually inspect the filters at least quarterly; inspect them more often if the dust accumulation warrants
it. Replacement filters can be ordered from Notifier (exhaust tube/intake tube filter P/N F36-05-00).
The filters do not substantially affect smoke performance under normal conditions. There is very little restriction of
smoke entry even when up to 90% of the filter is clogged. Visual inspection is usually adequate to determine whether
the filters should be replaced because such a high percentage of contamination is required to affect performance.
STEP 7. PERFORM DETECTOR CHECK
7.1 AIR FLOW
1. To verify sufficient sampling of ducted air, use a manometer to measure the differential pressure created from air
flow across the sampling tubes. The pressure should measure no less than 0.01 inches of water and no greater
than 1.20 inches of water.
2. To determine that smoke is capable of entering the sensing chamber, a visual examination should be conducted
to note any obscurations around the sensing chamber. If a smoke test is required, smoke such as cigarette, cotton
wick, or punk smoke may be blown directly at the smoke detector head. It is important to plug the exhaust and
sampling tube hole to prevent ducted air from blowing smoke away from the smoke detector head. Record all test
records in the Detector Test Log (page 12).
CAUTION:
REMEMBER TO REMOVE THE PLUGS AFTER THIS TEST OR THE DETECTOR WILL NOT SENSE
SMOKE IN THE AIR DUCT.
7.2 ALARM TESTS
Before replacing the duct housing cover, the detector interconnections should be checked. The DHX-502A may be
checked as follows:
A. M02-04-00 MAGNET TEST
1. Make sure power is applied to the detector.
2. Place the painted surface of the test magnet against the housing next to the rib molded onto the outside of the
housing (see Figure 7).
3. The LEDs on the detector should latch on as should any accessories (i.e. RA400ZA, RTS451), and the alarm
condition should be verified at the control panel.
MOLDED RIB
TEST
MAGNET
PAINTED SIDE
TOWARD HOUSING
DUCT
DETECTOR
HOUSING
DETECTOR
HEAD
TWIST
COUNTERCLOCKWISE
TO REMOVE
DUCT
HOUSING
TWIST
CLOCKWISE
TO INSTALL
DETECTOR
HEAD
A78-1812-05
A78-1812-02
Figure 7. Testing Detector Alarm
Figure 8. Detector Head Removal
A78-2095-02
N500-04-00
6
I56-507-06
N500-04-00
7
I56-507-06
