System Sensor DH100ACDC specifications Electrical Specifications

2.Vacuum sensing chamber before using clean, com- pressed air to loosen and blow out any remaining debris.

[8.0] Board Replacement

[8.1] Detector Board Replacement

1.	Remove the two detector board mounting screws.
2.	Pull gently on the board to remove it.

[8.2] Power Board replacement

1.	Disconnect wiring from the terminal block.
2.	Remove the two power board mounting screws.
3.	Pull gently on the board to remove it.
4.	To replace the board, align the board mounting fea-
	tures, holes, and the interconnect terminals. Push the
	board into place.

INSTALLATION AND MAINTENANCE INSTRUCTIONS

	A Division of Pittway
DH100ACDC Air Duct Smoke Detector	3825 Ohio Avenue, St. Charles, Illinois 60174
	1-800-SENSOR2, FAX: 630-377-6495

3.	To replace the board, align the board mounting fea-
	tures, holes, and the interconnect terminals. Push the
	board into place.
4.	Secure board with the two mounting screws.

5.	Secure board with the two mounting screws.
6.	Re-connect wiring to terminal block.

Before Installing

Please thoroughly read the System Sensor Guide for Proper Use of Smoke Detectors in Duct Applications (I56-473),which provides detailed information on detector spacing, place- ment, zoning, wiring, and special applications. Copies of this manual are available from System Sensor. NFPA Standards 72

tacts are available for control panel interface (alarm initia- tion), HVAC control, and other auxiliary functions. Auxiliary relays are also provided for fan shut down or signaling of up to 9 other detectors in the loop for multiple fan shut down. These detectors are not designed for 2-wire applications.

[9]Model DH100ACDC Air Duct Smoke Detector Specifications

Temperature:

	DH100ACDCP	32° to 131° F		0° to 55° C
	DH100ACDCI	32° to 120° F		0° to 49° C
Humidity:		10% to 93% R.H. noncondensing
Air Velocity:		500 to 4000 ft./min.		2.5 to 20.3 m/sec.
Dimensions:		14.38″ L x 5.5″ W x 2.75″ D		37cm L x 14cm W x 7cm D
Weight:		3.75 pounds		1.7 kg
Electrical Specifications
Power supply voltage:		20-29 VDC	24 VAC 50-60-Hz	120 VAC 50-60 Hz		220/240 VAC 50-60 Hz
Input capacitance:		270 μF max.	270 μF max.	N/A		N/A
Reset voltage:		3.0 VDC min.	2.0 VAC min.	10 VAC min.		20 VAC min.
Reset time (with RTS451):		.03 to 0.3 sec.	.03 to 0.3 sec.	.03 to 0.3 sec.		.03 to 0.3 sec.
Reset time (by power down):		0.6 sec. max.	0.6 sec. max.	0.6 sec. max.		0.6 sec. max.
Power up time:		34 sec. max.	34 sec. max.	34 sec. max.		34 sec. max.
Alarm response time:		2 to 17 sec.	2 to 17 sec.	2 to 17 sec.		2 to 17 sec.
Sensitivity Test:		See detector label	See detector label	See detector label		See detector label
	Power Supply Voltage	20 - 29 VDC	24 VAC 50 - 60 Hz	120 VAC 50 - 60 Hz	220/240 VAC 50 - 60 Hz
	CURRENT REQUIREMENTS (USING NO ACCESSORIES)
	Max. standby current	15 mA	35 mA RMS	25 mA RMS*		15 mA RMS*
	Max. alarm current	70 mA	125 mA RMS	35 mA RMS*		25 mA RMS*

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]	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

For testing, the alarm can be enabled by a magnet acti- vated 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 ac- cessories offer a variety of annunciation capabilities.

The DH100ACDC can be reset by a momentary power in- terruption, the reset button on the front cover, the control panel, or remote reset accessory.

[2]Limitations Of Duct Smoke Detectors

WARNING

The National Fire Protection Association has established that DUCT DETECTORS MUST NOT BE USED AS A SUB- STITUTE 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 recommends that the user read NFPA Standards 90A, 72, and 101. The DH100ACDC Air Duct Smoke Detectors are listed per UL 268A.

WARNING

CONTACT RATINGS

Alarm initiation contacts (SPST)	2.0A @ 30 VDC (resistive)
Alarm auxiliary contacts (DPDT)	10A	@ 30 VDC
	10A	@ 250 VAC

Note: Alarm auxiliary contacts must switch 100 mA minimum at 5VDC. Alarm auxiliary contacts shall not be connected to inititaing circuits of control panels. Use the alarm initiation contact for this purpose.

Trouble contacts (SPDT) 2.0A @ 30 VDC (resistive)

ACCESSORY CURRENT LOADS AT 24 VDC

DEVICE	STANDBY	ALARM
APA451	12.5mA Max. 30mA Max.
PA400	0mA	15mA Max.
RA400Z	0mA	10mA Max.
RTS451/ RTS451KEY	12mA	7.5mA Max.

*NOTE: When a unit is powered at the 120VAC or 220/240VAC input, any combination of accessories may be used such that the given accessory loads are:

60 mA or less in the standby state,

110 mA or less in the alarm state.

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 DH100ACDC Air Duct Smoke Detectors are supplied as an ionization model or photoelectronic model. These two smoke detection methods are combined with an effi-

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 protection specialist.

WARNING

This device will not sense smoke unless the ventilation sys- tem is operating and the cover is installed.

Three-Year Limited Warranty

cient housing design that samples air passing through a

WARNING

System Sensor warrants its enclosed air duct smoke detector to be free from defects in materials and workmanship under normal use and service for a period of three years from date of manufacture. System Sensor makes no other express warranty for this air duct smoke detector. No agent, rep- resentative, dealer, or employee of the Company has the authority to in- crease or alter the obligations or limitations of this Warranty. The Company’s obligation of this Warranty shall be limited to the repair or re- placement of any part of the air duct smoke detector which is found to be defective in materials or workmanship under normal use and service dur- ing the three year period commencing with the date of manufacture. After phoning System Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return Authorization number, send defective units postage prepaid to:

System Sensor, Repair Department, RA #__________, 3825 Ohio Avenue,

St. Charles, IL 60174. Please include a note describing the malfunction and suspected cause of failure. The Company shall not be obligated to repair or replace units which are found to be defective because of damage, un- reasonable use, modifications, or alterations occurring after the date of manufacture. In no case shall the Company be liable for any consequential or incidental damages for breach of this or any other Warranty, expressed or implied whatsoever, even if the loss or damage is caused by the Company’s negligence or fault. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This Warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

duct and allows detection of a developing hazardous condi- tion. When sufficient 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, 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.

DH100ACDC detectors are designed to operate on 24 VDC/ VAC, 120 VAC, or 240 VAC. Alarm and supervisory relay con-

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 op- erated within ALL electrical and environmental specifica- tions listed in this manual. Failure to comply with these requirements may prevent the detector from activating when smoke is present in the air duct.

D100-68-00 8 I56-1147-07

D100-68-00 1 I56-1147-07