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.
Figure 2
Installation and Wiring Diagram
A6V10323932_a_en_--
Siemens Industry, Inc.
Building Technologies Division
Florham Park, NJ
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.
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.
**HI921 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
FROM ADDRESSABLE
DEVICE CIRCUIT OF A
COMPATIBLE CONTROL
UNIT OR PREVIOUS
ADDRESSABLE DEVICE
Siemens Canada Limited
Building Technologies Division
2 Kenview Boulevard
Brampton, Ontario L6T 5E4 Canada
