System Sensor DH100ACDCLP User Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS
WARNING
WARNING
WARNING
WARNING
DH100ACDCLP Air Duct Smoke Detector with Extended Air Speed Range
The Innovair DH100ACDCLP model is a photoelectric detector approved for an extended air speed range of 100 to 4000 feet per minute (0.5 m/s to 20.3 m/s) and an opera­tional temperature range of 32°F to 131°F (0°C to 55°C).
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, Documents on Demand at 800/736-7672. NFPA Standards 72 and 90A should also be referenced for detailed information.
NOTICE: This manual shall 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
(alarm initiation), 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.
For testing, the alarm can be enabled by a magnet activated 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 accessories offer a variety of annunciation capabilities.
The DH100ACDCLP can be reset by a momentary power interruption, the reset button on the front cover, the con­trol panel, or remote reset accessory. The DH100ACDCLP
incorporates a cover tamper feature that provides a trouble signal after 7 minutes if the cover is removed or improperly installed. Proper installation of the cover
removes the trouble condition.
[2] Limitations Of Duct Smoke Detectors
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com
[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
The National Fire Protection Association has established that DUCT DETECTORS MUST NOT BE USED AS A SUBSTITUTE 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 DH100ACDCLP Air Duct Smoke Detectors are listed per UL 268A.
An HVAC system supplies conditioned air to virtually every area of a building. Smoke introduced into this air duct system will be distributed throughout the entire building. Smoke detectors designed for use in air duct systems are used to sense the presence of smoke in the duct.
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.
Model DH100ACDCLP Air Duct Smoke Detector utilizes photoelectric technology for the detection of smoke. This detection method, when combined with an efficient hous­ing design, samples air passing through the duct and allows
This device will not sense smoke unless the ventilation system is operating and the cover is installed.
detection of a developing hazardous condition. When suf­ficient smoke is sensed, an alarm signal is initiated and appropriate action can be taken to shut off fans, 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.
The DH100ACDCLP detector is designed to operate on 24 VDC/VAC, 120 VAC, or 240 VAC. Alarm and supervi-
For this detector to function properly, it MUST be installed according to the instructions in this manual. Furthermore, the detector MUST be operated within ALL electrical and environmental specifications listed in this manual. Failure to comply with these requirements may prevent the detec­tor from activating when smoke is present in the air duct.
sory relay contacts are available for control panel interface
D200-14-00 1 I56-0084-08R
SCREW HOLES FOR ATTA
CHING HOUSING
TO
DUCT WORK.
[3] Figure 1: Exploded View of Duct Smoke Detector Components
FOAM
GASKETS
METAL
SAMPLING TUBE
SAMPLING TUBE
FILTERS
DETECTOR
COVER
DETECTOR BOARD
CONDUIT HOLES
DETECTOR
HOUSING
TERMINAL STRIP
POWER BOARD
COVER MOUNTING
SCREWS
H0165-00
[4] Contents Of The Duct Smoke Detector Kit
1. Complete housing base and cover assembly
2. Two #10 x 11/4 sheet metal screws for mounting
3. Two sampling tube filters
4. One test magnet
5. Drilling template
6. Two foam gaskets
7. Four #6-self tapping mounting screws for the metal sampling tube and optional exhaust tube extension
NOTE: The sampling tube end cap is critical to the proper
operation of the duct smoke detector. The end cap is needed to create the proper air flow to the sensor of the duct smoke detector.
NOTE: For ducts greater than 11⁄2 feet in width, refer to
sections [5.4.1] and [5.4.2].
Figure 2. Plastic sampling tube connected to duct smoke detector:
8. One sampling tube end cap
9. One plastic sampling tube
10. One #8 self-tapping screw for the plastic sampling tube
NOTE: For ducts over 11⁄2 feet, longer sampling tubes must
be ordered to complete the installation. They must be the correct length for the width of the duct where they will be installed. See Table 1 on page 3 to determine the inlet tube required for different duct widths.
[5] Installation Sequence [5.1] Verify Duct Air Flow Direction And Velocity
Model DH100ACDCLP detectors are designed to be used in air handling systems having air velocities of 100 to 4000 feet per minute. Be sure to check engineering specifications to ensure that the air velocity in the duct falls within these parameters. If necessary, use a velocity meter (anemom­eter) to check the air velocity in the duct.
[5.2] Drill The Mounting Holes
Remove the paper backing from the mounting template supplied. Affix the template to the duct at the desired mounting location. Make sure the template lies flat and smooth on the duct. Center punch holes A and B. Drill the holes as indicated on the template.
[5.2.1] Sampling Tube Installation for Ducts Less Than 11⁄2 Feet Wide (see Figure 2)
1. Remove the front cover.
2. Slide the plastic sampling tube into the housing bushing.
3. Align the holes in the bushing with the holes in the
sampling tube. Make sure there are 6 exposed holes on
[5.3] Secure The Detector Housing To The Duct
Slide the foam gaskets over the tube bushings as shown in Figure 3. Use the two 11/4 long sheet metal screws to screw the detector housing to the duct.
CAUTION: Do not overtighten the screws.
Figure 3. Installation of foam gaskets over sampling tube bushings:
H0110-00
the plastic sampling tube. Secure with the #8 self-tapping screw into the bottom of the permanent tube (shown in Fig. 2).
D200-14-00 2 I56-0084-08R
H0107-00
SAMPLING TUBE END CAP
AIR HOLES
ARROW
MUST
FACE
INTO AIR FLOW
AIR FLOW DIRECTION
FLANGE
AIR FLOW
DIRECTION
DETECTOR
HOUSING
DOTS INDICATE POSITION OF
SAMPLING TUBE HOLES
AIR FLOW
DIRECTION
DETECTOR
HOUSING
SAMPLING
TUBE
EXHAUST
TUBE
AIR FLOW
DIRECTION
EXHAUST
TUBE
SAMPLING
TUBE
SAMPLING
TUBE
EXHAUST
TUBE
DETECTOR
HOUSING
AIR FLOW
DIRECTION
DETECTOR
HOUSING
A.
B.
C.
D.
HORIZONTAL MOUNTING OF HOUSING
VERTICAL MOUNTING OF HOUSING
[5.4] Sampling Tube Installation for Ducts Greater Than 11⁄2 Feet Wide
The sampling tube is identified by a series of air inlet holes on the tube. A plastic tube is included for ducts up to 18 in width. All other lengths must be purchased separately. Order the correct length, as specified in Table 1, for width of the duct where it will be installed. It is recommended that the sampling tube length extend at least 2⁄3 across the duct width for optimal performance. The exhaust tube is molded onto the base of the duct housing, and the A2440-00 Exhaust Tube Extension is available as an acces­sory in those cases where the molded exhaust port does not extend at least 2 inches into the duct.
NOTE: The sampling tube end cap is critical to the proper
operation of the duct smoke detector. The end cap is needed to create the proper air flow to the sensor of the duct smoke detector.
Figure 4. Air duct detector sampling tube:
The sampling tube is always installed with the air inlet holes facing into the air flow. To assist proper installation, the tube’s mounting flange is marked with an arrow. Make sure the sampling tube is mounted so that the arrow points
Figure 5. Tube mounting configurations with varying air flow direction:
H0108-02
into the air flow (see Figure 4). Figure 5 shows the various combinations of tube mounting configurations with respect to air flow. Mounting the detector housing in a vertical ori­entation is acceptable, provided that the air flows directly into the sampling tube holes as indicated in Figure 4.
Table 1. Sampling tubes recommended for different duct widths:
Outside Duct Width Sampling Tube Recommended*
1 to 2 ft. ST-1.5 2 to 4 ft. ST-3 4 to 8 ft. ST-5 8 to 12 ft. ST-10
*Must extend a minimum of 2/3 the duct width
[5.4.1] Installation For Ducts Greater Than 11⁄2 Feet But Less Than 8 Feet Wide
1. If the tube is longer than the width of the air duct, drill a 3/4″ hole in the duct opposite the hole already cut for
NOTE: Only metal sampling tubes may be used on orientations C and D.
H0109-01
the sampling tube. Make sure the hole is 1″ to 2″ below the inlet hole on the opposite side of the duct to allow moisture drainage away from the detector. If the tube is shorter than the width of the air duct, install the end cap into the sampling tube as shown in Figure 4. Sampling tubes over 3 ft. long must be supported at the end oppo­site the duct smoke detector.
2. Slide the tube into the housing bushing that meets the air flow first. Position the tube so that the arrow points into the air flow.
3. Secure the tube flange to the housing bushing with two #6 self-tapping screws.
4. For tubes longer than the width of the air duct, the tube should extend out of the opposite side of the duct. If there are more than 2 holes in the section of the tube extending out of the duct, select a different length using Table 1. Otherwise, trim the end of the tube protruding through the duct so that 1 to 2 of the tube extend out­side the duct. Plug this end with the end cap and tape closed any holes in the protruding section of the tube. Be sure to seal the duct where the tube protrudes.
D200-14-00 3 I56-0084-08R
[5.4.2] Installation For Ducts More Than 8 Feet Wide
NOTE: To install sampling tubes in ducts more than 8
feet wide, work must be performed inside the air duct. Sampling of air in ducts wider than 8 feet is accomplished by using the ST-10 sampling tube. If the tube is shorter than the width of the air duct, install the end cap into the sampling tube as shown in Figure 4 and support the end opposite the duct smoke detector.
Install the sampling tube as follows:
1. Drill a 3/4″ hole in the duct directly opposite the hole already drilled for the sampling tube. Make sure the hole is 1 to 2 below the inlet hole on the opposite side of the duct to allow for moisture drainage.
2. Slide the sampling tube with the flange into the housing bushing that meets the air flow first. Position the tube so that the arrow points into the air flow. Secure the tube flange to the housing bushing with two #6 self-tapping screws.
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