D400-13-00
1
I56-0555-010R
DH400ACDCP Air Duct Smoke Detector
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsenor.com
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, Docu-
ments on Demand at 800/736-7672. NFPA Standards 72 and
90A should also be referenced for detailed information.
NOTICE:
This manual should 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] Exploded View of Duct Detector Components
2
[3] Contents of the Duct Detector Kit
2
[4] Limitations of Duct Detectors
2
[5] Installation Sequence
2
[6] Duct Detector Maintenance and Test Procedures
5
[7] Detector Cleaning Procedures
9
[8] Specifications
11
Warranty
12
Detector Test log
16
List of Tables and Figures
Page
Fig. 1: Duct Detector Exploded View
2
Fig. 2: Installation of Sampling Tube Gaskets
3
Fig. 3: Mounting Location of Speed Nuts
3
Table 1: Inlet Sampling Tube Selection
3
Fig. 4: Inlet Sampling Tube
4
Fig. 5: Sampling Tube Mounting Configurations
4
Fig. 6: Sampling Tube Filter Installation
5
Fig. 7: Wiring Diagram
6
Fig. 8: Wiring Diagram – No Control Panel
7
Fig. 9: Wiring Diagram – Accessories
8
Fig. 10: Testing Detector Alarm
9
Fig. 11: Detector Head Removal
9
Fig. 12: RTS451/RTS451KEY Test Coil Installation
10
Fig. 13: Photo Head Exploded View
10
[1] General Description
An HVAC system supplies conditioned air to virtually ev-
ery area of a building. Smoke introduced into this air duct
system will be distributed to the entire building. Smoke
detectors designed for use in air duct systems are used to
sense the presence of smoke in the duct.
Model DH400ACDCP Air Duct Smoke Detector utilizes pho-
toelectric 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 at the
fire control panel monitoring the detector, and appropriate
action can be taken to shut off fans and 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.
DH400ACDCP detectors are designed to operate from 24
VDC, 24 VAC, 120 VAC, or 240 VAC. Alarm and supervisory
relay contacts are available for control panel interface (alarm
initiation), HVAC control, and other auxiliary functions.
These detectors are not designed for 2-wire application.
For testing, the alarm can be enabled by a magnet activated
test switch, by insertion of a calibrated test card into the
sensing chamber (photoelectronic version only), or by the
optional remote test station. The duct smoke detectors latch
into alarm state when alarm occurs. LEDs on each detector
illuminate to provide local alarm indication, and optional
accessories offer a variety of annunciation capabilities.
The detector can be reset by a momentary power inter-
ruption, by the magnet activated reset switch, or by the
optional remote test station.
I56-0
555-0
10R
