Before Installing

INSTALLATION AND MAINTENANCE INSTRUCTIONS

DH500ACDC Intelligent Air Duct Smoke Detector Housing

3825 Ohio Avenue, St. Charles, Illinois 60174 1-800-SENSOR2, FAX: 630-377-6495 www.systemsensor.com

Specifications
Length:			14.5 inches			(36.7 cm.)
Width:			5 inches			(12.7 cm.)
Depth:			4 inches			(10.2 cm.)
Weight:			4 lbs.		(1.8 kg.)
Operating Temperature Range:			32° to 120°F (0° to 49°C)
Operating Humidity Range:			10% to 93% Relative Humidity
Duct Air Velocity:			500 – 4000 ft./min. (91.4 – 1219.2 m/min.
Power Supply Electrical Ratings For DH500ACDC
Power	120 VAC (102 - 132)			240 VAC (204 - 264)			24 VAC (20.6 - 26.4)		24 VDC (20 - 30)
Requirements	mA rms MAX.			mA rms MAX.			mA rms MAX.		mA DC MAX.

Device	Standby	Alarm		Standby		Alarm	Standby	Alarm	Standby	Alarm

DH500ACDC	44	52		25		30	65	182	26	87
PA400*	--	3		--		1.5	--	29	--	15
RA400ZA*	--	1.5		--		1	--	17.3	--	10
RTS451/RTS451KEY*	--	1.5		--		1	--	17.3	--	10
RTS451**/RTS451KEY	11.5	13		5.5		6.5	140	157	95	103

The currents shown for the DH500ACDC are maximum values with no accessories.

*All accessory currents are additional to DH500ACDC. There are no additional currents for accessories in standby.

**RTS451/RTS451KEY when the magnet is held in place to initiate an alarm.

24V output maximum load is 80 mA; auxiliary alarm output maximum load is 20 mA.

Auxiliary Relay Contacts

Minimum contact current must be greater than 500 mA at 24 VDC 10 amps maximum at 30 VDC 10 amps maximum at 250 VAC

Please thoroughly read the System Sensor Manual I56- 473-XX, Guide for Proper Use of Smoke Detectors in Duct Applications, which provides detailed information on detector spacing, placement, zoning, wiring, and special applications. Copies of this manual are available at no charge from System Sensor. 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.

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.

The DH500ACDC Air Duct Detector Housings are used with System Sensor’s Model 1551 ionization detector heads and Model 2551 photoelectronic detector heads (purchased sep- arately). These two smoke detection methods are combined with an efficient housing design that samples air passing through a duct and allows detection of a developing hazard- ous condition. 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 and blowers, change over air handling systems, etc. This can prevent the distribution of toxic smoke and fire gases throughout the areas served by the duct system.

D500-07-00

I56-432-11R

DH500ACDC specifications

The System Sensor DH500ACDC is a versatile and reliable heat detector that has gained a reputation for its advanced technology and robust features, making it an ideal choice for both commercial and residential fire safety applications. This heat detector is designed to enhance fire detection systems by providing accurate temperature monitoring and fast response times, thereby ensuring optimal safety for buildings and their occupants.

One of the standout features of the DH500ACDC is its dual power source capability, allowing it to operate seamlessly on both AC and DC power. This flexibility ensures that the detector continues to function efficiently even during power outages, making it an essential component of any comprehensive fire safety system. The ability to work with varied power sources maximizes its usability across different environments.

Equipped with a sophisticated thermal sensing element, the DH500ACDC is capable of detecting high temperatures or rapid rises in temperature. Its fixed temperature setting, combined with its rate of rise detection feature, enables it to quickly identify potential fire hazards. This dual mechanism significantly reduces the likelihood of false alarms while maintaining sensitivity to genuine threats.

The device is built for durability and reliability. Featuring a rugged construction, it is designed to withstand harsh environmental conditions, making it suitable for industrial settings, warehouses, and other challenging environments. Additionally, the detector's low-profile design allows for easy installation and minimal aesthetic disruption in any setting.

Another noteworthy characteristic of the DH500ACDC is its compatibility with various fire alarm control panels. This interoperability facilitates seamless integration into existing systems, enhancing overall functionality without the need for extensive modifications. This feature is particularly beneficial for organizations looking to upgrade their fire safety infrastructure.

Moreover, the DH500ACDC has undergone rigorous testing and complies with international standards, ensuring quality and performance that fire safety professionals can trust. Its comprehensive range of features, alongside its advanced technologies, make it a top choice for those seeking to enhance their fire detection capabilities.

In conclusion, the System Sensor DH500ACDC represents a significant advancement in heat detection technology. Its dual power source capability, sophisticated sensing mechanisms, rugged construction, and compatibility with fire alarm systems make it an indispensable tool in safeguarding lives and property against the dangers of fire. This detector embodies the commitment to safety that System Sensor is known for, providing peace of mind to users in various applications.

DH500ACDC Intelligent Air Duct Smoke Detector Housing

Power Supply Electrical Ratings For DH500ACDC

Auxiliary Relay Contacts