D100-68-00 1 I56-1684-06R
DH100ACDCI Ionization
Air Duct Smoke Detector
INSTALLATION AND MAINTENANCE INSTRUCTIONS
A Division of Pittway
3825 Ohio Avenue, St. Charles, Illinois 60174
800/736-7672, FAX: 630-377-6495
Before Installing
Please thoroughly read the System Sensor
Guide for Proper
Use of Smoke Detectors in Duct Applications
(A05-1004),
which provides detailed information on detector spacing,
placement, zoning, wiring, and special applications. Copies
of this manual are available online at www.systemsensor.com
or via System Sensor’s toll free fax-back service, Documents
on Demand at 800/736-7672. NFPA Standards 72 and 90A
should also be referenced for detailed information.
NOTICE:
This manual shall be left with the owner/user of
this equipment.
IMPORTANT:
This detector must be tested and maintained
regularly following NFPA 72 requirements. The detector
should be cleaned at least once a year.
Table of Contents Page
[1]General Description 1
[2]Limitations of Duct Smoke Detectors 1
[3]Exploded View of Duct Smoke Detector Components 2
[4]Contents of the Duct Smoke Detector Kit 2
[5]Installation Sequence 2
[6]Duct Smoke Detector Maintenance and Test Procedures 5
[7]Detector Cleaning Procedures 7
[8]Board Replacement 8
[9]Specifications 8
Warranty 8
[1] General Description
An HVAC system supplies conditioned air to virtually every
area of a building. Smoke introduced into this air duct sys-
tem will be distributed to the entire building. Smoke detec-
tors designed for use in air duct systems are used to sense
the presence of smoke in the duct.
Model DH100ACDCI Air Duct Smoke Detectors utilizes ion-
ization technology for the detection of smoke. This smoke
detection method, when combined with an efficient hous-
ing design, samples air passing through the duct and allows
detection of a developing hazardous condition. When suf-
ficient smoke is sensed, an alarm signal is initiated and
appropriate action can be taken to shut off fans, blowers,
change over air handling systems, etc. These actions can
facilitate the management of toxic smoke and fire gases
throughout the areas served by the duct system.
The DH100ACDCI detector is designed to operate on 24
VDC/VAC, 120 VAC, or 240 VAC. Alarm and supervisory
relay contacts are available for control panel interface
(alarm initiation), HVAC control, and other auxiliary func-
tions. Auxiliary relays are also provided for fan shut down
or signaling of up to 9 other detectors in the loop for mul-
tiple fan shut down. These detectors are not designed for
2-wire applications.
For testing, the alarm can be enabled by a magnet activated
test switch or by the optional remote test station. The duct
smoke detector latches into alarm state when an alarm
occurs. A green LED flashes to indicate power, a red LED
signals local alarm indication, and optional accessories
offer a variety of annunciation capabilities.
The DH100ACDCI can be reset by a momentary power
interruption, the reset button on the front cover, the control
panel, or remote reset accessory.
The DH100ACDCI incor-
porates a cover tamper feature that provides a trouble
signal after 7 minutes if the cover is removed or improp-
erly installed.
Proper installation of the cover removes the
trouble condition.
[2] Limitations Of Duct Smoke Detectors
WARNING
The National Fire Protection Association has established that
DUCT DETECTORS MUST NOT BE USED AS A SUBSTITUTE
FOR OPEN AREA DETECTOR PROTECTION as a means of
providing life safety. Nor are they a substitute for early
warning in a building’s regular fire detection system.
System Sensor supports this position and strongly recom-
mends that the user read NFPA Standards 90A, 72, and 101.
The DH100ACDCI Air Duct Smoke Detectors are listed per
UL 268A.
WARNING
This device will not operate without electrical power. Fire
situations may cause an interruption of power. The system
safeguards should be discussed with your local fire protec-
tion specialist.
WARNING
This device will not sense smoke unless the ventilation
system is operating and the cover is installed.
WARNING
For this detector to function properly, it MUST be installed
according to the instructions in this manual. Furthermore,
the detector MUST be protected from the elements and
operated within ALL electrical and environmental specifi-
cations listed in this manual. Failure to comply with these
requirements may prevent the detector from activating
when smoke is present in the air duct.
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