Notifier DHX-501 Installation And Maintenance Instructions Manual - page 6
Note:
Auxiliary devices (RA400Z, PA400, RTS451/RTS451KEY) and auxiliary control contacts will
not
function
without auxiliary power. See 5A for voltage/termination.
(A78-2092-04)
FIGURE 5A
FIGURE 5B
FIGURE 5D
FIGURE 5C
SAMPLING TUBE
FILTERS
SAMPLING TUBE
MOUNTING
SCREWS
DETECTOR HEAD
EXHAUST
FILTER ADAPTER
DETECTOR BASE
INLET SAMPLING TUBE
FOAM GASKET
(A78-2106-00)
Figure 6. Sampling Tube Filter Installation
ALARM SIGNAL (+)
AUX POWER (-)
2
6
(+)
(-)
DUCT DETECTOR
DHX-501
PA400 (OPTIONAL)
AUDIBLE ALERT
ALARM SIGNAL (+)
AUX POWER (-)
2
6
(+)
(-)
DUCT DETECTOR
DHX-501
RA400Z (OPTIONAL)
REMOTE (LED)
ANNUNCIATOR
RED
ALARM SIGNAL (+)
AUX POWER (-)
2
6
1
2
DUCT DETECTOR
DHX-501
RTS451/RTS451KEY
(OPTIONAL) REMOTE
TEST STATION
R
E
D
5
3
1
4
TEST (+)
3
AUX POWER (+)
TEST (-)
NOTE: THE RTS451 RESET CANNOT BE USED ON THE DHX-501.
TEST (-)
RESET
(NOT USED)
45
6789
1
0
1
1
1
2
1
3
1
4
1
5
1
6
1
7
+-
COMMUNICATION
LINE
FROM PANEL
(+)
(-)
(+)
(-)
COMMUNICATION
LINE TO REST
OF SYSTEM
NOTE: FOR POWER SUPPLY
WIRES, POLARITY IS NOT
IMPORTANT.
ALWAYS RUN AUXILIARY CONTROL
WIRING IN SEPARATE CONDUIT
J5
K2
123
24 VAC &
24 VDC
240 VAC
120 VAC
NOTE: JUMPER WIRE (J5)
IS REQUIRED TO BE
INTACT FOR 2-WIRE
APPLICATIONS ONLY.
CUT J5 FOR 4-WIRE
POWER SUPERVISION.
AUX POWER
AUX POWER
AUX POWER
Figure 5. Wiring Diagram
STEP 6. INSTALL THE FILTERS
Most duct installations are subject to dust accumulation. System filters remove a large percentage of this contami-
nation, but cannot remove all of it. Dust inside the duct detector causes problems. First, very fine particles of dust can
enter the detector sensing chamber and cause the unit to go into alarm. Second, the accumulation of dust and dirt
necessitates a more frequent periodic cleaning schedule,
which can result in substantial cost and/or down time.
Disposable sampling tube filters can greatly reduce the
nuisance alarms caused by dust, and can also significantly
extend the maintenance interval. To install the sampling
tube filters, press the filter adapter into the exhaust tube,
and then push the filter onto the adapter tube on the left, as
shown in Figure 6. Then install the other filter over the end
of the inlet sampling tube.
Caution:
Filters require periodic cleaning or replace-
ment, 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. Replace-
ment filters can be ordered from Notifier –
exhaust tube/intake tube filter P/N F36-05-
00.
N500-03-00
6
I56-456-07
N500-03-00
7
I56-456-07
The filters do not substantially affect smoke behavior even when they are up to 90% clogged. Quarterly visual
inspection is usually often enough to determine if filters should be replace because only a high percentage of
contamination affects duct detector 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, conduct a visual examination and note any
obscurations around the sensing chamber. If a smoke test is required, smoke a 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 at the end of this manual.
NOTE:
REMOVE THE PLUGS AFTER TESTING OR THE DETECTOR WILL NOT SENSE SMOKE IN THE AIR
DUCT.
7.2 ALARM TESTS
Before replacing the duct housing cover, check the detector interconnections. Check the DHX-501 as follows:
A. M02-04-00 MAGNET TEST
1. Make sure power is applied to the detector.
2. Position the painted surface of the test magnet against the housing next to the rib molded onto the outside of
the housing (see Figure 7).