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DETECTOR PROGRAMMING
Each detector must be programmed to respond to a unique
system address between 001 - 252.
• To program the detector address, use the Model DPU
Device Programming Unit. Refer to the DPU Manual, P/N
315-033260.
• Record the loop and device number (system address) for
the detector on the detector label and on the base to
prevent installing the detector in the wrong base. The
optional DPU label printer can be used for this purpose.
Each detector provides pre-programmed parameter sets which
can be selected by the panel. Please follow the corresponding
descriptions of the panel used.
• Sensitive
• Standard
• Robust
• Air Duct
When using this detector direct in air duct
applications, be sure the detector is set to the
parameter “Air Duct.”
WIRING
Detector bases for Model FDO421 should be connected as
shown in Figure 2.
DETECTOR MOUNTING
To ensure proper installation of the detector head into the base,
be sure the wires are properly dressed at installation:
• Position all wires flat against the base.
• Take up all slack in the outlet box
• Route wires away from connector terminals.
TO INSTALL DETECTOR HEAD:
• Rotate detector counterclockwise while gently pressing on
it until the detector seats fully into base.
• Then rotate the detector clockwise until it stops and locks in
place. Insert optional locking screw (Order Model LK-11).
TO REMOVE DETECTOR HEAD:
• Loosen locking screw, if installed. Then rotate the detector
counterclockwise until stop is reached.
• Pull detector out of base.
DETECTOR TESTING
Only qualified service personnel should test. To assure proper
operation of the detector, both the Sensitivity and Functional
Test should be conducted. The minimum test schedule may be
found in the current edition of NFPA 72.
SENSITIVITY MEASUREMENT
The sensitivity of FDO421 detectors can be tested individually
using the DPU. Refer to the DPU Manual, P/N 315-033260. The
sensitivity can also be measured by the panel. Follow the
instructions of the panel used.
FUNCTIONAL TEST
Perform a functional (Go, No-Go) test by activating the detector
using Test Gas, P/N 500-649750, following the instruction on
the gas canister label. This test is simply used to ensure that
smoke can enter the sensing chamber and alarm the control
panel when the detector reaches the programmed obscuration
(concentration) level.
The FDO421 detectors can also be tested individually using the
DPU. Refer to the DPU Manual, P/N 315-033260.
DETECTOR MAINTENANCE
The control unit automatically indicates the trouble message for
the FDO421 detector whose smoke chamber changes to the
level where the set sensitivity cannot be maintained. In such
circumstances, the detector may require replacement.
CAUTION:
UNDER NO CIRCUMSTANCES IS THE
DETECTOR HEAD TO BE DISASSEMBLED. NO REPAIRS
SHOULD BE ATTEMPTED.
DO NOT PAINT
The detector/base plastic is marked
DO NOT PAINT
. This is
intended to prohibit painting during routine maintenance of the
occupancy which can affect proper operation of the detector.
TO INITIATING
CIRCUIT OF
SIEMENS
INDUSTRY, INC.
COMPATIBLE
CONTROL UNIT
OPTIONAL
REMOTE
ALARM
INDICATOR
MODELS
RL-HW/RL-HC
TO NEXT BASE
TO NEXT BASE
DO NOT
USE AN
END OF
LINE
DEVICE
DETECTOR BASE
MODEL DB-11/DB-11E
LINE 1**
LINE 2**
5
6
1a
TB1
TB3
TB2
1b
5
6
1a
1b
RELAY*
CONTACTS
3A, 120 VAC
3A, 30 VDC
REMOTE RELAY
BASE MODEL DB2-HR
*The relay contacts are shown after System reset, which represents the non-alarm condition.
**FDO421 is a polarity insensitive detector. Line 1 and Line 2 can be either line of the loop.
5+
NO
C
NC
6–
5+
NO
C
NC
6–
DO NOT
USE AN
END OF
LINE
DEVICE
Figure 2
Installation and Wiring Diagram
A6V10323926_a_en_--
Siemens Industry, Inc.
Building Technologies Division
Florham Park, NJ
Siemens Canada Limited
Building Technologies Division
2 Kenview Boulevard
Brampton, Ontario L6T 5E4 Canada
