D100-68-00
7
I56-1525-000
Figure 11. Testing detector alarm:
A78-2325-00
[6.2.2.2] RTS451A/RTS451KEYA Remote Test Station
The RTS451A/RTS451KEYA Remote Test Station facilitates
test of the alarm capability of the duct smoke detector as in-
dicated in the RTS451A/RTS451KEYA manual. The
DH100ACDCA duct smoke detector can be reset by the
RTS451A/RTS451KEYA. If a system control panel is used,
the panel itself may also require testing.
To install the RTS451A/RTS451KEYA, connect the device as
shown in Figure 9; wire runs must be limited to 25 ohms or
less per interconnecting wire.
[6.2.3] Sensitivity Tests
[6.2.3.1] MOD400 or MOD400R Test
After verification of alarm capability, use the MOD400R test
module with a voltmeter to check detector sensitivity as indi-
cated in the test module’s manual. The housing cover must
be removed to perform this test.
If test module readings indicate that the detector head is out-
side of the acceptable range that is printed on the label of the
detector, the detector chamber requires cleaning per Section
[7] of this manual.
[7] Detector Cleaning Procedures
Notify the proper authorities that the smoke detector system is
undergoing maintenance, and that the system will temporarily
be out of service. Disable the zone or system undergoing
maintenance to prevent unwanted alarms and possible dis-
patch of the fire department.
[7.1] Air Filters
1. Turn off power to the system.
2. Remove and inspect sampling tube filters.
3. If filters are heavily coated with dirt, replace them with new
filters. If they are not heavily coated, use a vacuum cleaner
or compressed air nozzle to remove dust, then reinstall the
filters.
[7.2] Photo Detector Boards
1. Remove the screen by gently grasping on each side and
pulling straight off.
2. Lift the photo chamber in the same fashion. Vacuum the
screen and cover. Use clean, compressed air to loosen
and blow out any remaining debris. Replacement screens
(S08-39-01) are available.
3. Vacuum photo chamber, then use clean compressed air to
blow area clean.
4. Replace the chamber by pressing it onto the base. Press
the screen into place. It should fit tightly on the chamber.
[7.3] Ion Detector Boards
1. Brush or vacuum inside area of cover. Chamber may then
be blown out using clean, compressed air.
2. Vacuum sensing chamber before using clean, com-
pressed air to loosen and blow out any remaining debris.
[8.0] Board Replacement
[8.1] Detector Board Replacement
1.
Remove the two detector board mounting screws.
2.
Pull gently on the board to remove it.
ALARM SIGNAL (+)
AUX POWER (Ð)
15
20
(+)
(Ð)
DUCT DETECTOR
DH100ACDCA
PA400 (OPTIONAL)
AUDIBLE ALERT
ALARM SIGNAL (+)
AUX POWER (Ð)
15
20
(+)
(Ð)
DUCT DETECTOR
DH100ACDCA
RA400ZA (OPTIONAL)
REMOTE (LED)
ANNUNCIATOR
RED
ACCESSORY CURRENT LOADS AT 24 VDC
DEVICE
APA451
PA400
RA400ZA
RTS451/RTS451KEY
STANDBY
12.5mA Max.
0mA
0mA
12mA Max.
ALARM
30mA Max.
15mA Max.
10mA Max.
7.5mA Max.
When a unit is powered at the 120VAC or 220/240VAC input,
any combination of accessories may be used such that the given
accessory loads are:
60mA or less in the standby state,
110mA or less in the alarm state.
Figure 10. Wiring diagrams for optional accessories (see page 6 for APA451 wiring diagram):
A78-2354-05
