D100-68-00 1 I56-1147-12R
DH100ACDCP Air Duct Smoke Detector
INSTALLATION AND MAINTENANCE INSTRUCTIONS
A Division of Pittway
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, 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 from System Sensor. 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 DH100ACDCP Air Duct Smoke Detector utilizes
photoelectric technology for the detection of smoke. This
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 at the
fire control panel monitoring the detector, 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 DH100ACDCP detector is designed to operate on
24 VDC/VAC, 120 VAC, or 240 VAC. Alarm and supervi-
sory 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 DH100ACDCP can be reset by a momentary power
interruption, the reset button on the front cover, the control
panel, or remote reset accessory. The DH100ACDCP 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
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 substi-
tute 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 DH100ACDCP Air Duct Smoke Detectors are listed per
UL 268A.
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.
This device will not sense smoke unless the ventilation
system is operating and the cover is installed.
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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