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Canned aerosol simulated smoke (canned smoke agent) formulas will vary by
manufacturer. Misuse or overuse to these products may have long term adverse
effects on the smoke detector. Consult the canned smoke agent manufacturer's
published instructions for any further warnings or caution statements.
[12.6] inSTaLL The coVer
Install the covers making sure that the cover fits into the base groove. Tighten
the seven screws that are captured in the covers.
NOTE: Verify sensor cover gasket is properly seated on cover prior to cover
installation.
[13] 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 dispatch of the fire department.
figure 10. deTecTor SenSor exPLoded VieW:
COVER
REMOVAL
TABS
[13.1] deTecTor SenSor
1.
Remove the sensor to be cleaned from the system.
2.
Remove the sensor cover by pulling outward on each of the four removal
tabs that hold the cover in place. See Figure 10.
3.
Vacuum the screen carefully without removing it. If further cleaning is
required continue with Step 4, otherwise skip to Step 7.
4.
Remove the chamber cover/screen assembly by pulling it straight out.
5.
Use a vacuum cleaner or compressed air to remove dust and debris from
the sensing chamber.
6.
Reinstall the chamber cover/screen assembly by sliding the edge over the
sensing chamber. Turn until it is firmly in place.
7.
Replace the cover using the holes for the LEDs for alignment and then
gently pushing it until it locks into place.
8.
Reinstall the detector.
[13.2] reinSTaLLaTion
1.
Reinstall the detector in its housing.
2.
Restore system power.
3.
Perform Detector Check, Section 12.3.
4.
Notify the proper authorities testing has been completed and the smoke
detector system is back in operation.
[14] SenSor rePLacemenT (ParT no. 2d51)
1.
Remove the sensor head by rotating counterclockwise.
2.
Pull gently to remove it.
3.
To replace the sensor head, align the mounting features and rotate clock-
wise into place.
[15] oPTionaL acceSSorieS
[15.1] rTS451/rTS451keY remoTe TeST STaTion
The RTS451/RTS451KEY Remote Test Station facilitates test of the alarm capa-
bility of the duct smoke detector as indicated in the RTS451/RTS451KEY man-
ual. The D4120 duct smoke detector can be reset by the RTS451/RTS451KEY.
To install the RTS451/RTS451KEY, connect the device as shown in Figure 12;
wire runs must be limited to 25 ohms or less per interconnecting wire. If a
system control panel is used, the panel itself may require testing.
[15.2] SSk451 muLTi-SignaLing acceSSorY
The SSK451 Multi-Signaling accessory combines a sounder feature with a key
activated test and reset function. Green, amber and red LEDs provide a vi-
sual indication of power, trouble, and alarm respectively. An optional strobe
(PS24LOW) with a smoke lens can be added to conform to the codes of certain
jurisdictions.
To install the SSK451, connect the device as shown in Figure 14.
SS-300-000
CAUTION
SENSOR
COVER
SENSING
CHAMBER
COVER AND
SCREEN
SENSOR
CHAMBER
figure 11. Wiring diagramS for oPTionaL acceSSorieS:
15
ALARM
AUX OUT –
20
D4120
DUCT DETECTOR
figure 12. Wiring diagram for d4120 To aPa151 or aPa451:
APA151/451
COMMON
(RED LED) ALARM
(GREEN LED) POWER
NOTE: WIRING DIAGRAM SHOWN IS FOR D4120 4-WIRE DUCT SMOKE
H0584-00
DETECTOR SYSTEM EQUIPPED WITHOUT A CONTROL PANEL.
NOTE: A TROUBLE CONDITION IS INDICATED
BY LOSS OF GREEN LED
figure 13. Wiring diagram for d4120 To rTS451/rTS451keY:
RTS451/RTS451KEY
FIELD
INSTALLED
JUMPER
(RED LED)
ALARM
(GREEN LED)
POWER
FOR RTS451KEY ONLY WITHOUT A CONTROL PANEL
figure 14. Wiring diagram for d4120 To SSk451:
SSK451
FIELD
INSTALLED
JUMPER
POWER +
FOR
TEMPORAL
POWER –
PATTERN
COMMON
TEMPORAL SELECT
ALARM SIGNAL
RESET
SUP. SIGNAL
NOTE: WIRING DIAGRAM SHOWN IS FOR D4120 4-WIRE DUCT SMOKE
DETECTOR SYSTEM EQUIPPED WITHOUT A CONTROL PANEL.
7
(+)
ALARM
AUX OUT –
(–)
MHR/MHW
D4120
(OPTIONAL) AUDIO
DUCT DETECTOR
ALERT
10
9
AUX OUT +
19
AUX OUT –
1
20
1
12
2
15
ALARM
11
R TEST
R RESET
2
+
ACC +
–
ACC –
3
D4120
10
9
AUX OUT +
19
2
20
AUX OUT –
1
4
12
1
15
ALARM
5
11
R TEST
3
R RESET
2
+
ACC +
–
ACC –
6
D4120
10
9
5
19
AUX OUT +
6
20
AUX OUT –
1
3
2
12
1
15
ALARM
TEST
8
11
R TEST
R RESET
7
2
+
ACC +
–
ACC –
4
(+)
15
RED
20
(–)
RA400Z(OPTIONAL)
REMOTE (LED)
ANNUNCIATOR
H0554-00
D4120
FIELD
7
INSTALLED
18
JUMPER
8
17
6
16
14
SUP, NO
SUP, C
3
13
5
4
C1009-00
7
18
8
17
6
16
14
SUP, NO
SUP, C
3
13
5
4
H0582-00
7
18
8
17
6
16
14
SUP, NO
SUP, C
3
13
5
4
H0583-00
I56-2967-002R
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