Table of Contents
Advertisement
Quick Links
INSTALLATION AND MAINTENANCE INSTRUCTIONS
DH400ACDCP Air Duct Smoke Detector
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
[1] General Description
List of Tables and Figures
Fig. 1: Duct Detector Exploded View
Fig. 2: Installation of Sampling Tube Gaskets
Fig. 3: Mounting Location of Speed Nuts
Table 1: Inlet Sampling Tube Selection
Fig. 4: Inlet Sampling Tube
Fig. 5: Sampling Tube Mounting Configurations
Fig. 6: Wiring Diagram
Fig. 7: Wiring Diagram - No Control Panel
Fig. 8: Wiring Diagram - Accessories
Fig. 9: Sampling Tube Filter Installation
Fig. 10: Testing Detector Alarm
Fig. 11: Detector Head Removal
Fig. 12: RTS451/RTS451KEY Test Coil Installation
Fig. 13: Photo Head Exploded View
D400-13-00
[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.
Page
1
DH400ACDCP detectors are designed to operate from 24
2
VDC, 24 VAC, 120 VAC, or 240 VAC. Alarm and supervisory
2
relay contacts are available for control panel interface
2
(alarm initiation), HVAC control, and other auxiliary func-
2
tions. These detectors are not designed for 2-wire appli-
8
cation.
10
12
For testing, the alarm can be enabled by a magnet activated
13
test switch, by insertion of a calibrated test card into the
16
sensing chamber (photoelectronic version only), or by the
optional remote test station. The duct smoke detectors latch
Page
into alarm state when alarm occurs. LEDs on each detector
2
illuminate to provide local alarm indication, and optional
3
accessories offer a variety of annunciation capabilities.
3
3
The detector can be reset by a momentary power inter-
4
ruption, by the magnet activated reset switch, or by the
4
optional remote test station.
6
7
8
8
9
9
10
11
1
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsenor.com
I56-555-09R
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for System Sensor DH400ACDCP
Summary of Contents for System Sensor DH400ACDCP
-
Page 1: Table Of Contents
These actions should be cleaned at least once a year. can facilitate the management of toxic smoke and fire gases throughout the areas served by the duct system. Table of Contents Page [1] General Description DH400ACDCP detectors are designed to operate from 24 [2] Exploded View of Duct Detector Components VDC, 24 VAC, 120 VAC, or 240 VAC. Alarm and supervisory [3] Contents of the Duct Detector Kit relay contacts are available for control panel interface [4] Limitations of Duct Detectors (alarm initiation), HVAC control, and other auxiliary func- [5] Installation Sequence tions. These detectors are not designed for 2-wire appli-... -
Page 2: Exploded View Of Duct Detector Components
[5.5] Complete the field wiring STITUTE FOR OPEN AREA DETECTOR PROTECTION as a [5.6] Install the filters and check pressure differential means of providing life safety. Nor are they a substitute for [5.7] Perform detector check early warning in a building’s regular fire detection system. [5.8] Install the cover System Sensor supports this position and strongly recom- [5.1] Verify Duct Air Flow Direction And Velocity mends that the user read NFPA Standards 90A, 72, and 101. Model DH400ACDCP detectors are designed to be used in The DH400ACDCP Air Duct Smoke Detectors are listed per air handling systems having air velocities of 500 to 4000 UL 268A. D400-13-00 I56-555-09R... - Page 3 [5.4] Install The Inlet feet per minute. Be sure to check engineering specifications to ensure that the air velocity in the duct falls within these The inlet tube (shown in Figure 4) is identified by a series parameters. If necessary, use a velocity meter to check the of air inlet holes on the tube. This tube must be purchased air velocity in the duct. separately. Order the correct length, as specified in Table 1, for width of the duct where it will be installed. The exhaust [5.2] Drill The Mounting Holes tube is molded into the base of the duct housing, and the Remove the paper backing from the mounting template A2440-00 Exhaust Tube Extension is available as an ac- supplied. Affix the template to the duct at the desired cessory in those cases where the molded exhaust port does mounting location. Make sure the template lies flat and not extend at least 2 inches into the duct.
- Page 4 Figure 4. Air duct detector inlet sampling tube: AIR HOLES INLET FLANGE TUBE PLUG ARROWS AIR FLOW DIRECTION MUST FACE INTO AIR FLOW H0108-00 Figure 5. Tube mounting configurations with varying air flow direction: DOTS INDICATE POSITION OF SAMPLING TUBE HOLES AIR FLOW AIR FLOW DIRECTION DIRECTION DETECTOR DETECTOR...
-
Page 5: Wiring Instructions
The housing provides a terminal strip with clamping plates. these cases a 3 inch floor flange (available at most plumb- Wiring connections are made by stripping about 3/8-inch ing supply stores) may be used to fasten the sampling tube of insulation from the end of the wire, sliding the bare end to the other side of the duct. When using the flange/con- under the plate, and tightening the clamping plate screw. nector mounting technique, drill a 1 inch to 1-1/4-inch hole where the flange will be used. The DH400ACDCP duct detector is designed to operate from 24 VDC, 24 VAC, 120 VAC, or 240 VAC. [5.4.3] Modifications Of Inlet Sampling Tubes There may be applications where duct widths are not what The detector may be wired for interconnection to UL listed is specified for the installation. In such cases, it is permis- control panels, or for stand alone service per NFPA 90A. sible to modify an inlet sampling tube that is longer than Refer to the wiring diagrams of Figures 6, 7, and 8 to select necessary to span the duct width. - Page 6 Figure 6. System wiring diagram for duct detectors using a UL listed control panel (see Figure 8 for wiring of optional accessories): CAUTION Do not loop wire under terminals when wiring detectors. Break wire runs to provide system supervision of connections. H0252-00 D400-13-00 I56-555-09R...
- Page 7 STANDBY. CONTACTS TRANSFER DURING ALARM AS INDICATED BY THE ARROWS. ALARM INITIATION CONTACTS ALARM INITIATION CONTACT RATING 2.0A @ 30 VAC/DC (0.6 POWER FACTOR) N.O. TROUBLE CONTACTS CLOSED IN ALARM AND STANDBY. CONTACTS OPEN WHILE DETECTOR HEAD OR POWER IS REMOVED, AND DURING RESET. OPEN CONTACTS SIGNAL TROUBLE CONDITION TO PANEL. ALARM (+) ALARM SIGNAL COMMON (–) AUX POWER TROUBLE CONTACT RATING (+) AUX POWER FIELD 0.3A @ 32 VAC/DC INSTALLED JUMPER TROUBLE CONTACTS CLOSED IN STANDBY AND ALARM. GRN. CONTACTS OPEN WHILE DETECTOR HEAD OR POWER TROUBLE IS REMOVED, AND DURING RESET. OPEN CONTACTS CONTACTS EXTINGUISH OPTIONAL APA451 GREEN “POWER” LED POWER TO INDICATE TROUBLE CONDITION. DH400ACDCP APA451 DUCT DETECTOR AUDIBLE PIEZO ALERT WITH ALARM AND POWER (TROUBLE) LEDS. FOR STAND ALONE APPLICATIONS ONLY. APA451 RECOMMENDED FOR COMPLIANCE TO NFPA 90A. LOCATE IN NORMALLY OCCUPIED AREA OF PREMISES. H0253-00 D400-13-00 I56-555-09R...
-
Page 8: Duct Detector Maintenance And Test Procedures
Figure 8. Wiring diagrams for optional accessories (see Figure 7 for APA451 wiring diagram): ALARM SIGNAL (+) ALARM SIGNAL (+) ALARM SIGNAL (+) AUX POWER (–) AUX POWER (–) AUX POWER (–) (–) (–) FIELD INSTALLED DUCT DETECTOR PA400 (OPTIONAL) DUCT DETECTOR RA400Z (OPTIONAL) JUMPER RESET (–) RESET DH400ACDCP AUDIBLE ALERT DH400ACDCP REMOTE (LED) ANNUNCIATOR TEST (–) TEST ACCESSORY CURRENT LOADS AT 24 VDC DEVICE STANDBY ALARM APA451 12mA MAX 30mA MAX DUCT DETECTOR RTS451/RTS451KEY DH400ACDCP (OPTIONAL) REMOTE... - Page 9 Figure 10. Testing detector alarm: Figure 11. Detector head removal: DETECTOR HEAD DETECTOR HEAD TWIST COUNTERCLOCKWISE TO REMOVE DUCT HOUSING TEST RESET TEST MAGNET LOCATOR LOCATOR PAINTED SIDE TOWARD HOUSING DUCT HOUSING TWIST CLOCKWISE TO INSTALL H0250-00 H0251-00 [6.1] Smoke Entry Tests Trouble- If the detector LEDs do not blink or if the APA451 [6.1.1] Air Flow Power LED is not illuminated, the detector lacks To verify sufficient sampling of ducted air, use a manometer...
-
Page 10: Detector Cleaning Procedures
Figure 12. RTS451/RTS451KEY test coil installation: TEST COIL DETECTOR HEAD H0245-00 the RTS451/RTS451KEY manual. The DH400ACDCP duct ing and wait 50 seconds for power up. Do not hold the detector can be reset by the RTS451/RTS451KEY. If a sys- swirl chamber to twist the detector head. tem control panel is used, the panel itself may also require 5. Insert the NO ALARM end of the test card into the test resetting. slot (see Figure 13) and slide it counterclockwise until it stops. The detector should not alarm after 20 seconds. To install the RTS451/RTS451KEY, connect the device as 6. Remove the card and then insert the ALARM end into... - Page 11 Figure 13. Photo head exploded view: REMOVABLE HEAD COVER TEST SLOT CLEANABLE SCREEN P/N RS24 (W/O THERMAL) HEAD COVER REMOVAL SLOT VANED CHAMBER H0261-00 3. Vacuum the photo chamber. Use clean compressed air to blow it clean. 4. Replace the screen by aligning the arrow on top with the field test port on the detector. Press the screen into place. It should fit tightly on the chamber. 5. Replace the detector cover and rotate it clockwise to lock it in place. [7.4] Reinstallation 1. Reinstall the detector in its housing. 2. Restore system power. 3. Perform Detector Check, Section [5.7]. 4. Notify the proper authorities testing has been completed and the smoke detector system is back in operation. D400-13-00 I56-555-09R...
-
Page 12: Specifications
[8] Model DH400ACDCP Air Duct Smoke Detector Specifications Description HVAC air duct mounted ionization or photoelectronic smoke detector for separately powered systems or stand alone sys- tems. Auxiliary alarm relay contacts provide fan contactor shutdown to prevent HVAC circulation of smoke. Environmental Limits Temperature: 32°F to 120°F 0°C to 49°C Humidity: 10% to 93% R.H. non-condensing Air Velocity: 500 to 4000 Ft/min. 2.54 to 20.3 m/sec. Test Features Magnetic test switch, magnetic reset switch, MOD400R test module (optional), RTS451 Remote Test Station (optional). Mechanical Specifications Length: 14.5 inches 37 cm Width: 5 inches 13 cm Depth (installed): 4 inches 10 cm Weight: 4 pounds 1.8 kg Terminals Captive universal terminal screws with sems plates accept wire sizes of 14 gauge or smaller. The screws can withstand 10 in-lbs of tightening torque without damage. -
Page 13: Warranty
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 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 head label See head label See head label See head label Electrical Ratings Power Supply Voltage... - Page 14 NOTES D400-13-00 I56-555-09R...
- Page 15 NOTES D400-13-00 I56-555-09R...
-
Page 16: Detector Test Log
DETECTOR TEST LOG Detector Identification Information Manufacturer and Serial Date Detector Model: _ _____________________ Number: _ _____________________ Installed: ___________________ Description of Detector Location: ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ Test Results and Maintenance Data Date Test Test Maintenance Tested Description Results Performed Comments ________ _ __________ _______ ______________ ___________________________ ________ ________...
Need help?
Do you have a question about the DH400ACDCP and is the answer not in the manual?
Questions and answers