User manual System Sensor Smoke Alarm Intelligent Air Duct Smoke Detector Housing

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INSTALLATION AND MAINTENANCE INSTRUCTIONS  
DH500 Intelligent Air Duct Smoke  
Detector Housing  
3
825 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:  
Depth:  
Weight:  
5 inches  
3.5 inches  
2.8 lbs.  
(12.7 cm)  
(8.9 cm)  
(1.1 kg)  
Operating Temperature Range:  
Operating Humidity Range:  
Duct Air Velocity:  
Electrical Ratings for DH500  
Voltage Range:  
Standby Current (nominal):  
Power-Up Surge at Max.  
Rated Voltage:  
32° to 120°F (0° to 49°C)  
10% to 93% Relative Humidity  
500 – 4000 ft./min. (91.4 – 1219.2 m/min.)  
14.5 – 32 VDC Peak  
150uA at 24 VDC  
1.5mA-sec.  
LED current (nominal):  
6mA at 24 VDC  
Before Installing  
blowers, change over air handling systems, etc. This can  
Please thoroughly read System Sensor’s Guide for Proper prevent the distribution or isolation of toxic smoke and fire  
Use of Smoke Detectors in Duct Applications (I56-473-XX), gases throughout the areas served by the duct system.  
which provides detailed information on detector spac-  
ing, placement, zoning, wiring, and special applications.  
Two LEDs on each detector latch ON to provide a local  
Copies of this manual are available from System Sensor.  
alarm indication. There is also a remote alarm output  
NFPA Standards 72 and 90A should also be referenced for  
for use with auxiliary devices. The DH500 has remote  
detailed information.  
test capability with the RTS451/RTS451KEY Remote Test  
Station.  
NOTICE: This manual should be left with the owner/user  
of this equipment.  
Contents of the Duct Detector Housing Kit  
IMPORTANT: This detector must be tested and maintained  
regularly following NFPA 72 requirements. The detector The DH500 consists of the following items: (See Figure 1.)  
should be cleaned at least once a year.  
See Note 1 on Page 2 for inlet sampling tube and detector  
General Description  
supply information.  
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.  
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8
. Complete housing base and cover assembly.  
. Two #10 sheet metal mounting screws.  
. Two sampling tube filters.  
. One test magnet.  
. Drilling template.  
. Two 5/16-inch O-rings.  
. Two rubber tube bushings seals.  
. Four #6 self-tapping mounting screws for the sampling  
tube.  
The DH500 Air Duct Detector Housings are used with  
System Sensor’s intelligent model 1551 ionization detector  
head and model 2551 photoelectronic detector head. These  
two principal smoke detection methods are combined with  
an efficient housing design that samples air passing through  
a duct and allows early detection of a developing hazardous  
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  
9
. One filter adapter.  
10. One inlet tube end plug.  
11. Four #6x7/10 cover mounting screws.  
1
1
2. Two #10 speed nuts.  
3. One test coil and parts bag.  
D500-08-00  
1
I56-512-07R  

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