System Sensor DH400ACDCP specifications Install The Filters, Sampling tube filter installation

Figure 8. Wiring diagrams for optional accessories (see Figure 7 for APA451 wiring diagram):

5	(+)
ALARM SIGNAL (+)
AUX POWER (–)
6	(–)
DUCT DETECTOR	PA400 (OPTIONAL)
DH400ACDCP	AUDIBLE ALERT

5	(+)
ALARM SIGNAL (+)
AUX POWER (–)	RED
6	(–)
DUCT DETECTOR	RA400Z (OPTIONAL)
DH400ACDCP	REMOTE (LED)
	ANNUNCIATOR

5		1
ALARM SIGNAL (+)
			R
6		2	E
AUX POWER (–)			D
		4
3	FIELD
	INSTALLED
	JUMPER	3
RESET (–)			RESET
4		5
TEST (–)			TEST

ACCESSORY CURRENT LOADS AT 24 VDC

DEVICE	STANDBY	ALARM
APA451	12mA MAX	30mA MAX
PA400	0mA	15mA MAX
RA400Z	0mA	10mA MAX
RTS451/RTS451KEY	0mA*	10mA MAX*

ANY COMBINATION OF ACCESSORIES MAY BE USED SUCH THAT THE GIVEN CURRENT LOADS TOTAL:

100mA OR LESS IN THE STANDBY STATE, 150mA OR LESS IN THE ALARM STATE.

*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.

DUCT DETECTOR	RTS451/RTS451KEY
DH400ACDCP	(OPTIONAL) REMOTE
	TEST STATION

H0254-00

[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:

INLET SAMPLING TUBE

FOAM GASKET

SAMPLING TUBE

MOUNTING

SCREWS

DETECTOR BASE

EXHAUST

FILTER ADAPTER

DETECTOR HEAD

SAMPLING TUBE

FILTERS

H0239-00

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).

[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 assist maintenance personnel in verification of proper de- tector 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 I56-555-09R