System Sensor DH400ACDCI - Manual (Page 8)

[5.6] Install The Filters
To install the sampling tube filters, simply push the filter
adapter into the exhaust tube, and push the filter onto the
adapter tube on the left, as shown in Figure 9. Install the
other filter over the end of the inlet sampling tube.
Figure 9. Sampling tube filter installation:
SAMPLING TUBE
FILTERS
SAMPLING TUBE
MOUNTING
SCREWS
DETECTOR HEAD
EXHAUST
FILTER ADAPTER
DETECTOR BASE
INLET SAMPLING TUBE
FOAM GASKET
A78-2106-01
CAUTION
Filters require periodic cleaning or replacement, depending
on the amount of dust and dirt accumulated. Visually in-
spect the filters at least quarterly; inspect them more often
if the dust accumulation warrants it. See Section [6] for
more information. Replacement filters can be ordered from
System Sensor, 3825 Ohio Ave., St. Charles, IL 60174. (Ex-
haust tube/intake tube filter P/N F36-05-00).
Figure 8. Wiring diagrams for optional accessories (see Figure 7 for APA451 wiring diagram):
ALARM SIGNAL (+)
AUX POWER (–)
5
6
(+)
(–)
DUCT DETECTOR
DH400ACDC PA400 (OPTIONAL)
AUDIBLE ALERT
ALARM SIGNAL (+)
AUX POWER (–)
5
6
(+)
(–)
DUCT DETECTOR
DH400ACDC RA400Z (OPTIONAL)
REMOTE (LED)
ANNUNCIATOR
RED
ALARM SIGNAL (+)
AUX POWER (–)
5
6
1
2
DUCT DETECTOR
DH400ACDC RTS451/RTS451KEY
(OPTIONAL) REMOTE
TEST STATION
R
E
D
5
3
4
3
RESET
TEST
4
FIELD
INSTALLED
JUMPER
ACCESSORY CURRENT LOADS AT 24 VDC
DEVICE
APA451
PA400
RA400Z
RTS451/RTS451KEY
STANDBY
12mA MAX
0mA
0mA
0mA*
ALARM
30mA MAX
15mA MAX
10mA MAX
10mA MAX*
ANY COMBINATION OF ACCESSORIES MAY BE USED SUCH THAT THE GIVEN
CURRENT LOADS TOTAL:
RESET (–)
TEST (–)
*NOTE: WHEN INITIATING AN ALARM, THE RTS451/RTS451KEY REQUIRES 95mA MAXIMUM
IN PRE-ALARM AND 103mA MAXIMUM IN ALARM. NOMINAL STANDBY
CURRENT IS 0mA. ALARM CURRENT IS 10mA MAXIMUM WHEN TEST
MAGNET IS REMOVED.
100mA OR LESS IN THE STANDBY STATE,
150mA OR LESS IN THE ALARM STATE.
A78-2354-00
[5.7] Perform Detector Check
1. Perform the STANDBY AND TROUBLE TEST per Section
[6.2.1].
2. Perform the MAGNET TEST per Section [6.2.2.1]. The
RTS451 test of Section [6.2.2.2] may substitute for this
requirement.
3. Perform the AIR FLOW TEST per Section [6.1.1].
4. Perform the SMOKE RESPONSE TEST per Section
[6.1.2].
5. Perform the SENSITIVITY TEST per Section [6.2.3].
6. Record all test results in the Detector Test Log at the end
of this manual.
[5.8] Install The Cover
Install the cover using the four screws that are fixed in the
housing cover. Be certain filters are installed as specified in
Section [5.6]. Make sure that the cover fits into the base
groove and that all gaskets are in their proper positions.
Tighten the four screws to 10 in-lbs.
[6] Duct Detector Maintenance And Test Procedures
Test and maintain duct detectors as recommended in NFPA
72. The tests contained in this manual were devised to as-
sist maintenance personnel in verification of proper detec-
tor operation.
Before conducting these tests, notify the proper authorities
that the smoke detection system will be temporarily out of
service. Disable the zone or system under test to prevent
unwanted alarms.
After conducting these tests, record the appropriate infor-
mation in the Detector Test Log at the end of this manual.
D400-13-00 8 I56-555-08