Siemens Industry, Inc.
Building Technologies Division
P/N 315-034800-3
3
Sensitivity Measurement
The sensitivity of HFPO-11 detectors can be tested individu-
ally using the DPU. Refer to the DPU Manual, P/N 315-033260.
Functional Test
Perform a functional (Go, No-Go) test by activating the detec-
tor using
Test Gas, P/N 315-282747, following the instruction
on the 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 (con-
centration) level.
The HFPO-11 detectors can also be tested individually using
the DPU. Refer to the DPU Manual, P/N 315-033260.
DETECTOR CLEANING AND MAINTENANCE
The control unit automatically indicates the trouble message
"Maint Alert" for the HFPO-11 detector whose smoke cham-
ber changes to the level where the set sensitivity cannot be
maintained. In such circumstances, the detector may require
cleaning as a result of dust or debris accumulation; follow the
CLEANING PROCEDURE
steps.
The recommended requirement for detector maintenance
consists of the annual cleaning of dust and debris from the
detector head. Cleaning program intervals should be geared
to the individual detector environment.
If the fire alarm control panel is connected to a
Fire Department, etc., or activates an external
system (fire extinguishing, etc.), disarm the ap-
propriate outputs before servicing to prevent ac-
tivation. Be sure to reset and rearm the system
at completion of servicing. Notify facility person-
nel that the system is being serviced so that any
alarm soundings can be ignored during the pe-
riod of service.
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
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 DB-HR
*The relay contacts are shown after System reset, which represents the non-alarm condition.
**HFPO-11 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
CLEANING PROCEDURE (See Figure 3)
1. Notify the proper personnel that the fire alarm system
is being serviced.
2. Remove the detector to be cleaned from its base. (See
To Remove Detector Head
on page 2.)
3. Using a small blade screwdriver, remove the cover from
the rest of the detector by releasing the 2 cover tabs
located on the outside of the cover. Separate the foam
screen from the cover.
4. Remove the labyrinth from the sensing chamber by
squeezing the labyrinth sides along the release axis and
pulling out.
5. Clean dust from the detector cover, foam screen, sens-
ing chamber and labyrinth using a brush, or by blowing
with compressed air.
Do not use a compressed air supply that
may contain an oil residue.
Do not remove or loosen the two screws on
the rear of the detector, or calibration data
will be lost.
The insect screen and labyrinth may be re-
placed with new parts, rather than be cleaned.
Contact Siemens Industry, Inc., Product Service
to order Detector Maintenance Kit, Model
DMK-11.
Figure 3
Disassembling of Photochamber
COVER
FOAM SCREEN
LABYRINTH
SENSING
CHAMBER
RELEASE
AXIS
RELEASE
AXIS
(MATCHES AXIS
OF REAR SCREWS)
LOCKING
SCREW
(OPTIONAL)
COVER TAB
