Johnson Controls METASYS DH500 Series Manual
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Johnson Controls METASYS DH500 Series Manual

Johnson Controls METASYS DH500 Series Manual

Intelligent air duct smoke detector
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DH500 Series Intelligent Air Duct Smoke Detector
© 1995 Johnson Controls, Inc.
Code No. LIT-408095
Fire Initiating Devices and Notification Appliances Technical Manual 408
Intelligent Products Section
Technical Bulletin
Issue Date 1095
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Summary of Contents for Johnson Controls METASYS DH500 Series

  • Page 1: Table Of Contents

    DH500 Series Intelligent Air Duct Smoke Detector Introduction Page General Description Installation Procedures General Information Installation Mounting Wiring Installation Guidelines Testing and Maintenance Procedures Testing Testing Alarms Maintenance Detector Test Log Limitations © 1995 Johnson Controls, Inc. Code No. LIT-408095...
  • Page 2 2 Intelligent Products—DH500 Series Intelligent Air Duct Smoke Detector...

  • Page 3: Introduction

    Failure to follow these directions may result in failure of this device to report an alarm or trouble condition or respond properly to an alarm condition. Johnson Controls is not responsible for devices that have been improperly installed, tested, or maintained by others.

  • Page 4: General Description

    A Heating, Ventilating, and Air Conditioning (HVAC) system supplies General conditioned air to virtually every area of a building. Smoke introduced Description 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 and initiate action to prevent the spread of smoke.
  • Page 5 Order the inlet sampling tube and a smoke detector head (1551J for ionization or an 2551J for photoelectronic) separately. The sampling tube selected must be the correct length for the width of the duct where it will be installed. To determine the inlet tube required for different duct widths, see Table 4: Sampling Inlet Tubes in the Mounting, Mount Duct Housing section of this technical bulletin.
  • Page 6 Table 2: Specifications Summary Specifications Length 14.5 in. (368.3 mm) Width 5 in. (127 mm) Depth 4 in. (101.6 mm) DH500J 3.5 in. (88.9 mm) DH502J Weight 4 lb (1820 g) DH500J 2 lb, 8 oz (1130 g) DH502J Operating Temperature Range 32 to 120°F (0 to 49°C) Operating Humidity Range 10 to 93% Relative Humidity...
  • Page 7 Table 3: Power Supply Electrical Ratings DH500J (With Relays) Power 120 VAC 240 VAC 24 VAC 24 VDC Requirements 102-132 mA 204-264 mA 20.6-26.4 mA 20-30 mA RMS Maximum RMS Maximum RMS Maximum DC Maximum Device Standby Alarm Standby Alarm Standby Alarm Standby...
  • Page 8 Programming Smoke detector models 1551J and 2551J can be used with the DH500 Requirements for series if the following constraints are observed: Intelligent 1. There may be a limit to the number of devices per Signaling Line System Control Circuit (SLC) that can have their LEDs latched on. Panels The actual number of devices is determined by the control panel and its ability to supply LED current.

  • Page 9: Installation Procedures

    Installation Procedures This section contains installation information for DH500 series intelligent General air duct smoke detectors. Instructions are given for wiring the detector, Information and basic installation information is provided. CAUTION: Equipment damage hazard. This device cannot operate without electrical power. This device will not sense smoke unless the ventilation system is operating.

  • Page 10: Installation

    Installation Installation 1. Verify duct air flow direction and velocity. Sequence 2. Drill the mounting holes. 3. Mount duct housing. 4. Install the inlet tube. 5. Complete the field wiring. 6. Install the filters. 7. Perform the detector check. 8. Install the cover. 9.

  • Page 11: Mounting

    Mounting Drill the Mounting 1. Remove the paper backing from the drilling template. Holes 2. Affix the template to the air duct at the desired mounting location oriented on the duct (Figure 4). 3. Make sure the template lies flat and smooth on the air duct. 4.
  • Page 12 Duct Wall Hole A Hole B Speed Nut ..dhfig2 Figure 2: Speed Nut Mounting Location In let S a m p lin g T u b e B u shin g D u ct D etecto r H ousin g M oun tin g E xha u st T ub e S crew s...
  • Page 13 D o ts Ind ica te P o sition of S am p lin g T u be H oles Air F low Air F low D irection D irection D uct D uct D e te cto r D e te cto r H ou sing H ou sing E xhaust...
  • Page 14 S a m p le In let H o les T ub e E n d P lug ..Air Flow D irectio n Arrows sho u ld fa ce in to a ir flow . d h fig 3 Figure 5: Air Duct Detector Inlet Sampling Tube Installation for Ducts less than Eight Feet Wide 1.
  • Page 15 CAUTION: Equipment damage hazard. In no case should more than two air inlet holes be cut off the tube. There must be a minimum of ten holes in the tube exposed to the air stream. Installation for Ducts more than Eight Feet Wide To install inlet tubes in ducts more than eight feet wide, work must be performed inside the air duct.

  • Page 16: Wiring Installation Guidelines

    To prevent this from occurring, use a three inch floor flange, available at most plumbing supply houses. This flange/connector mounting technique makes the initial installation easier because a 1 inch to 1-1/4 inch hole may be drilled where the flange/connector will be used. It is easier to push the inlet tube through the larger hole.
  • Page 17 In order for the alarm controlled relay to operate, a separate power supply must be connected to the DH500J. The power on the SLC is not adequate to operate the relay without supplying additional power. A separate power supply is not required with the DH502J. Wiring the The DH500J is designed for easy wiring.
  • Page 18 24 VAC/DC To complete the wiring for 24 VAC or DC 4-wire operation: Operation 1. Connect the power supply wires to Terminals 7 and 8. 2. Polarity is not important. Table 5: Accessory Current Loads at 24 VDC Device Standby Alarm PA400 0 mA...
  • Page 19 A lw ays ru n a uxiliary co ntro l w irin g in se pa ra te con du it. N o te : Ju m p e r w ire (J5 ) is re q u ire d to b e 12 0 V A C Jum per in ta ct fo r 2 -w ire...
  • Page 20 Perform Detector Filters require periodic cleaning or replacement, depending on the amount Check of dust and dirt accumulated. Visually inspect the filters at least quarterly; inspect them more often if the dust accumulation warrants it. The filters do not substantially affect smoke behavior even when they are 90% clogged.

  • Page 21: Testing And Maintenance Procedures

    Testing and Maintenance Procedures Before testing or maintenance of detectors, notify the proper authorities that the smoke detector system is undergoing maintenance and will be temporarily out of service. After a detector is set into alarm by one of the following test methods, and the alarm activating device is removed from the detector, the system should be reset at the control panel before testing any additional detectors.

  • Page 22: Testing Alarms

    Before replacing the duct housing cover, check the detector Testing Alarms interconnections. M02-04-00 1. Make sure power is applied to the detector. Magnet Test 2. Position the painted surface of the test magnet against the housing next to the rib molded onto the outside of the housing (Figure 8). Note: The LEDs on the detector should latch on as should any accessories (PA400, RA400Z, and RTS451).
  • Page 23 RTS451 Remote The RTS451 remote test station facilitates testing the alarm capability of Test Station the duct detector as indicated in the RTS451 Remote Test Station Technical Bulletin located in the Intelligent Products section of this manual. The DH500 series duct detector cannot be reset by the RTS451. It must be reset at the system control panel.
  • Page 24 R59-18-00 The R59-18-00 test card may be used to test the detector heads. Calibrated 1. Remove the duct housing cover. Test Card (Photoelectronic 2. Remove the detector head from the duct housing (Figure 10). Units Only) 3. Remove the detector head cover by placing a small-bladed screwdriver in the side slot of the detector cover, twisting it slightly until the cover can be turned counterclockwise (Figure 10).
  • Page 25 S m o ke D e te cto r H e a d T w ist C o u n te rclo ckw ise to R e m o ve D u ct D e te cto r H o u sin g T w ist C lo ckw ise to In sta ll...

  • Page 26: Maintenance

    Perform the Final 1. Place the magnet as described in the M02-04-00 Magnet Test section System Check of this technical bulletin (Figure 8). 2. Check that the LEDs on the detector lights. 3. Check that any accessory LED(s) lights. 4. Check that the system control panel then indicates an alarm. Air duct smoke detectors should be maintained at least once a year, and Maintenance more often if the detector heads become obviously dirty.
  • Page 27 Replace the screen by aligning the arrow on top with the field test slot on the base of the detector. Press the screen into place. It should fit tightly into the chamber. R em ovable H ead C over T est Slot C le anab le S cree n P /N R S 2 4 (w /o Th erm al) R S 2 4T (w /The rm al)
  • Page 28 Brush or vacuum the inside of the cover. Use clean, compressed air to blow it clean. Vacuum the sensing chamber. Use clean, compressed air to loosen and blow out any remaining debris. Press the screen back into the cover. Replace the detector cover on the sensing chamber. Rotate the detector cover clockwise to lock it in place.
  • Page 29 8. Put the detector into alarm using the appropriate method as described in the Testing and Maintenance Procedures section of this technical bulletin. 9. Notify the proper authorities that testing has been completed and the smoke detector system is back in operation. 10.

  • Page 30: Detector Test Log

    Detector Test Table 7: Detector Identification Information Manufacturer and Detector Model Serial Number Date Installed Description of Detector Location Table 8: Test Results and Maintenance Data Date Tested Test Description Test Results Maintenance Comments Performed 30 Intelligent Products—DH500 Series Intelligent Air Duct Smoke Detector...

  • Page 31: Limitations

    Nor are they a substitute for early warning in a building’s regular fire detection system. Johnson Controls supports this position and strongly recommends that the user read NFPA Standards 90A, 72-National Fire Alarm Code, and 101, or equivalent codes and standards specific to country of installation. The DH500 series is listed per UL 268A.
  • Page 32 Notes Controls Group FAN 408 507 E. Michigan Street Fire Initiating Devices and Notification Appliances Manual P.O. Box 423 Printed in U.S.A. Milwaukee, WI 53201 32 Intelligent Products—DH500 Series Intelligent Air Duct Smoke Detector...

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