System Sensor DH400ACDCP User Manual

Page 8

[6.1] Smoke Entry Tests
[6.1.1] Air Flow
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˝ of water and no greater than 1.20˝ of water.
[6.1.2] Smoke Response
To determine if smoke is capable of entering the sensing
chamber, visually identify any obstructions. Plug the ex-
haust and inlet tube holes to prevent ducted air from car-
rying smoke away from the detector head, then blow smoke
such as cigarette, cotton wick, or punk directly at the head
to cause an alarm. REMOVE THE PLUGS AFTER TESTING
OR THE DETECTOR WILL NOT FUNCTION PROPERLY.
[6.1.3] Filter Replacement
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 con-
tamination affects duct detector performance.
[6.2] Standby, Alarm, And Sensitivity Tests
[6.2.1] Standby And Trouble
Standby- Check for the presence of the blinking red LEDs

(blinks about every 10 seconds) through the trans-
parent housing cover. If the APA451 accessory is
used, its green Power LED should be illuminated
continuously.

Figure 9. Wiring diagrams for optional accessories (see Figure 8 for APA451 wiring diagram):

ALARM SIGNAL (+)

AUX POWER (–)

(+)

(–)

DUCT DETECTOR

DH400ACDCP

PA400 (OPTIONAL)

AUDIBLE ALERT

ALARM SIGNAL (+)

AUX POWER (–)

(+)

(–)

DUCT DETECTOR

DH400ACDCP

RA400Z (OPTIONAL)

REMOTE (LED)

ANNUNCIATOR

RED

ALARM SIGNAL (+)

AUX POWER (–)

DUCT DETECTOR

DH400ACDCP

RTS451/RTS451KEY

(OPTIONAL) REMOTE

TEST STATION

3 RESET

TEST

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.

H0254-00

Trouble- If the detector LEDs do not blink or if the APA451

Power LED is not illuminated, the detector lacks
power (check wiring, panel, or power supply),
the head is missing (install), or the unit is defec-
tive (return for repair).

Test- The trouble condition can be caused intentionally

to verify correct operation of the system. Remove
power to the unit, remove the detector head (see
Figure 11), or place the M02-04-00 magnet into the
Reset locator, as shown in Figure 10. These actions
should cause a trouble condition locally and at the
system control panel.

[6.2.2] Alarm Tests
[6.2.2.1] M02-04-00 Magnet Test
1. Place the painted surface of the magnet into the Test lo-

cator molded into the side of the housing (see Figure 10).

2. The red alarm LEDs on the detector should latch on,

as should any accessories (PA400, RA400Z, RTS451,
APA451). Verify auxiliary functions (such as fan shut-
down) and system control panel alarm status.

3. Place the painted surface of the magnet into the Reset

locator molded into the side of the housing (see Figure
10). This should clear the latched alarm condition at
the detector. If a system control panel is used, the panel
may also require resetting.

[6.2.2.2] RTS451/RTS451KEY Remote Test Station
The RTS451/RTS451KEY Remote Test Station facilitates test
of the alarm capability of the duct detector as indicated
in the RTS451/RTS451KEY manual. The DH400ACDCP
duct detector can be reset by the RTS451/RTS451KEY. If
a system control panel is used, the panel itself may also
require resetting.

D400-13-00

I56-0555-010R