System Sensor specifications DH400ACDCP Air Duct Smoke Detector, Before Installing, Page

INSTALLATION AND MAINTENANCE INSTRUCTIONS

DH400ACDCP Air Duct Smoke Detector

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 de- tector 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 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		8
[7]	Detector Cleaning Procedures		10
[8]	Specifications		12
Warranty			13
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:	Wiring Diagram	6
Fig. 7:	Wiring Diagram – No Control Panel	7
Fig. 8:	Wiring Diagram – Accessories	8
Fig. 9:	Sampling Tube Filter Installation	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	11

[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 photoelectric technology for the detection of smoke. This smoke detection method, when combined with an efficient housing design, samples air passing through the duct and allows detection of a developing hazardous condition. When sufficient smoke is sensed, an alarm signal is initi- ated at the fire control panel monitoring the detector, and appropriate action can be taken to shut off fans and blow- ers, 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 func- tions. These detectors are not designed for 2-wire appli- cation.

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.

D400-13-00 1 I56-555-09R