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WIRING
Detector bases for Model HI921 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.
LINE 1**
DETECTOR BASE
MODEL DB-11/DB-11E
FROM ADDRESSABLE
DEVICE CIRCUIT OF A
5
COMPATIBLE CONTROL
UNIT OR PREVIOUS
6
ADDRESSABLE DEVICE
LINE 2**
*The relay contacts are shown after System reset, which represents the non-alarm condition.
**HI921 is a polarity insensitive detector. Line 1 and Line 2 can be either line of the loop.
Figure 2
Installation and Wiring Diagram
Siemens Industry, Inc.
Building Technologies Division
Florham Park, NJ
1a
OPTIONAL
TB1
REMOTE
1b
ALARM
TB2
INDICATOR
MODELS
TB3
RL-HW / RL-HC
Siemens Canada Limited
Building Technologies Division
2 Kenview Boulevard
Brampton, Ontario L6T 5E4 Canada
DETECTOR TESTING
Only qualified service personnel should test. To assure proper
operation of the detector and control panel, the Functional Test
should be conducted. The minimum test schedule may be found
in the current edition of NFPA 72 for installations in the U.S.
The detectors can be tested individually using the DPU (refer to
the DPU manual, P/N 315-033260) or with the Model 8720
Programming Unit (refer to the 8720 Manual, P/N 315-033260FA).
MAINTENANCE
No special maintenance procedures are required for the HI921.
The control unit automatically indicates the trouble message for
any detector. This detector may need 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.
REMOTE RELAY
BASE MODEL DB2-HR
5+
RELAY*
NO
CONTACTS
C
6–
3A, 120 VAC
NC
3A, 30 VDC
TO NEXT BASE
5
1a
5+
NO
6
1b
C
6–
NC
TO NEXT BASE
A6V10323932_a_en_--
DO NOT
USE AN
END OF
LINE
DEVICE
DO NOT
USE AN
END OF
LINE
DEVICE
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