Johnson Controls METASYS DH500 Series Manual Download

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Fire Initiating Devices and Notification Appliances Technical Manual

408

Intelligent Products Section

Technical Bulletin

Issue Date

1095

1995 Johnson Controls, Inc.

Code No. LIT-408095

Introduction

Page

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General Description

Installation Procedures

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General Information

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Installation

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Mounting

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Wiring Installation Guidelines

Testing and Maintenance Procedures

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Testing

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Testing Alarms

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Maintenance

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Detector Test Log

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Limitations

DH500 Series Intelligent Air Duct Smoke Detector

Summary of Contents for METASYS DH500 Series

Page 1: ...Controls Inc 1 Code No LIT 408095 Introduction Page 3 General Description 4 Installation Procedures 9 General Information 9 Installation 10 Mounting 11 Wiring Installation Guidelines 16 Testing and Maintenance Procedures 21 Testing 21 Testing Alarms 22 Maintenance 26 Detector Test Log 30 Limitations 31 DH500 Series Intelligent Air Duct Smoke Detector ...

Page 2: ...2 Intelligent Products DH500 Series Intelligent Air Duct Smoke Detector ...

Page 3: ...NFPA 72 National Fire Alarm Code and NFPA 90A Installation of Air Conditioning and Ventilation Systems System Sensor Guide for Proper Use of System Smoke Detectors Technical Bulletin in the Fire Initiating Devices and Notification Appliances Technical Manual FAN 408 which provides detailed information on detector spacing placement zoning wiring and special applications or for non United States ins...

Page 4: ...stribution of toxic smoke and fire gases throughout the areas served by the duct system There are two models of the duct smoke detector the DH500J which has auxiliary relays that allow for optional fan control alarms etc and operates on 120 240 VAC or 24 VAC DC and the DH502J which has no auxiliary relays and operates on 24 VDC Both models have two Form C alarm activated relay output contacts that...

Page 5: ...ired for different duct widths see Table 4 Sampling Inlet Tubes in the Mounting Mount Duct Housing section of this technical bulletin Figure 1 Duct Detector Housing Kit Foam Gasket Detector Base Exhaust Filter Adapter Conduit Holes Detector Head Supplied Separately Sam pling Tube Filters Cover Screws Sam pling Tube M ounting Screws Duct Detector Cover Clear Plastic Tube End Plug Duct Detector Hous...

Page 6: ...77 VAC 0 75 power factor 240 VA 240 VAC 0 4 power factor 1 8 hp 120 VAC 1 4 hp 240 VAC Accessories Part Number Remote LED RA400Z Piezo Alert Sounder PA400 Replacement Filters F36 05 00 Magnet M02 04 00 End Plug For Sampling Tube P48 21 00 Installation Kit Parts bag A2650 01 DH500J A2650 00 DH502J Photoelectronic Replacement Screen RS24 Ionization Replacement Screen RS14 Sensitivity Test Kit MOD400...

Page 7: ...4 52 25 30 65 182 26 87 PA400 3 1 5 29 15 RA400Z 1 5 1 17 3 7 RTS451 1 5 1 17 3 7 RTS451 11 5 13 5 5 6 5 140 157 71 78 All accessory currents are additional to DH500J There are no additional currents for accessories in standby RTS451 when the magnet is held in place to initiate an alarm Output Maximum Load Rating 24V 80 mA 12V 20 mA DH502J Without Relays Voltage Range 15 28 VDC peak Standby Curren...

Page 8: ...010 systems with any level of software and for the IFC 2020 systems that use Release 2 Firmware Group M35 or higher and have intelligent detectors and modules with the R4 marking on their label The LED restriction does not apply All LEDs may be latched on Consult the IFC product line programming manuals for additional information 3 When FC 2000 control panels are used with AM 200 modules they may ...

Page 9: ...e unless the ventilation system is operating Frequently fire situations may cause an interruption of power to the detector The system safeguards should be discussed with your local fire protection specialist For this detector to function properly it must be installed according to the instructions in this document The detector must be protected from the elements and operate within all electrical an...

Page 10: ...ver 9 Perform the final system check as described in the Testing section of this technical bulletin The DH500 series is designed to be used in air handling systems having air velocities of 300 to 4000 feet per minute 1 Be sure to check engineering specifications to ensure that the air velocity in the duct falls within these parameters 2 If necessary use a velocity meter to check the air velocity i...

Page 11: ...ectors in or on air ducts at least six duct widths downstream from any duct openings deflection plates sharp bends or branch connections Note Where it is physically impossible to locate the detector accordingly the detector can be positioned closer than six duct widths but as far as possible from the opening bend or deflection plates 1 Remove the duct housing cover 2 Slide the foam gaskets over th...

Page 12: ...kets O rings Mounting Screws Screw Holes For Attatching Detector Housing to Duct Inlet Sampling Tube Bushing Figure 3 Installation of Foam Gaskets over Sampling Tube Bushings Table 4 Sampling Inlet Tubes for the DH500J and the DH502J Tube Outside Duct Width ST 1 5 1 to 2 ft 300 to 600 mm ST 3 2 to 4 ft 600 to 1200 mm ST 5 4 to 8 ft 1200 to 2400 mm ST 10 8 to 12 ft 2400 to 3700 mm DH500J 8 to 10 ft...

Page 13: ...tified by a series of air inlet holes on the tube Figure 5 This tube must be purchased separately Order the correct length for the width of the duct where it will be installed as described in Table 4 Sampling Inlet Tubes in this technical bulletin The exhaust tube is molded into the base of the duct housing 1 Install the inlet tube in the inlet sampling tube bushing located in the center of the du...

Page 14: ...be so that the arrows point into the air flow 5 Secure the tube flange to the housing bushing with the two No 6 self tapping screws 6 For tubes longer than the width of the air duct extend the tube out of the opposite side of the duct 7 If there are more than two holes in the section of the tube extending out of the duct select a different tube length as described in Table 4 Sampling Inlet Tubes i...

Page 15: ...nstalled using the 1 2 inch conduit fitting supplied Make sure that the holes on both of the air inlet tubes are lined up facing the direction of air flow 6 Trim the end of the tube protruding through the duct so that one to two inches of the tube extends outside the duct 7 Plug this end with the tube end plug and tape close any holes in the protruding section of the tube 8 Be sure to seal the duc...

Page 16: ...he National Electrical Code and the local codes having jurisdiction using the proper wire gauges The conductors used to connect smoke detectors to control panels and accessory devices should be color coded to reduce the likelihood of wiring errors Improper connections can prevent a system from responding properly in the event of a fire For Signaling Line Circuit SLC wiring the wiring between the c...

Page 17: ...crew The DH500J operates from 120 240 VAC or 24 VAC DC to operate auxiliary functions Figure 6 For the 4 wire operation of the DH500J for alarm controlled relay and auxiliary function activation 1 Cut the jumper wire J5 located between the two terminal strips on the printed circuit board Figure 6 to ensure proper power supply supervision when the detector is used in a 4 wire application relay circ...

Page 18: ...RA400Z 0 mA 7 mA Maximum RTS451 0 mA 7 mA Maximum When initiating an alarm the RTS451 requires 71 mA maximum in pre alarm and 78 mA maximum in alarm Nominal standby current is 0 mA The alarm current is 7 mA maximum when test magnet is removed Table 6 Accessory Total Current Loads Any combination of accessories used to give the total current loads Standby State 30 mA or less Alarm State 80 mA Maxim...

Page 19: ...e filter onto the adapter tube on the left Figure 7 3 Install the other filter over the end of the inlet sampling tube 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Always run auxiliary control wiring in separate conduit Comm unication Line From Panel Communication Line to Reset of System 1 Jumper J5 K2 2 3 Note For power supply wires polarity is not important Jum per wire J5 is required to be intact for 2 ...

Page 20: ...ld be replaced because only a high percentage of contamination affects duct detector performance Foam Gasket Detector Base Exhaust Filter Adapter Detector Head Sampling Tube Filters Sampling Tube Mounting Screws dhfig13 Inlet Sampling Tube Figure 7 Sampling Tube Filter Installation 1 Install the cover using the four screws that are fixed in the housing cover 2 Be certain filters are installed as d...

Page 21: ...ling of ducted air 1 Use a manometer to measure the differential pressure created from air flow across the sampling tubes 2 Verify that the pressure measures no less than 0 01 inches of water and no greater than 1 20 inches of water To determine that smoke is capable of entering the sensing chamber 1 Conduct a visual examination 2 Note any obscurations around the sensing chamber 3 Check to see if ...

Page 22: ... 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 3 Verify the alarm condition at the control panel Note The control panel must be active for an alarm to be initiated Duct Detector Housing dhfig7 Test Magnet Painted Side Toward Housing Detector Head Molded Rib Figure 8 Testing...

Page 23: ... be reset at the system control panel To install the RTS451 test coil 1 Connect the device Figure 9 2 Place the coil in the detector housing with the arrow facing up and pointing toward the detector Figure 9 3 Attach the coil leads to the housing terminals as shown Polarity is not important 4 Firmly screw the test coil mounting bracket in place over the test coil 5 Use wire that is less than 25 oh...

Page 24: ... head into the duct housing and wait 50 seconds for power up Do not hold the swirl chamber to twist the detector head 5 Insert the NO ALARM end of the test card into the test slot 6 Slide counterclockwise until it stops The detector should not alarm after 20 seconds 7 Remove the test card 8 Insert the ALARM end into the test slot 9 Slide it counterclockwise until it stops The LEDs should latch on ...

Page 25: ... the MOD400R or MOD400 readings indicate that the detector head is outside of the acceptable range the detector heads require cleaning as described in the Maintenance section of this technical bulletin 1 Look for the presence of the flashing red LEDs through the transparent housing cover 2 Verify that the LEDs flash approximately every ten seconds 1 Remove the detector head from the duct housing b...

Page 26: ...ts maintenance and comments A Detector Test Log is included in this technical bulletin 1 Turn off power to the system 2 Remove and inspect the sampling tube filters 3 If filters are heavily coated with dirt replace them with new filters following the procedure as described in the Install the Filters section of this technical bulletin 4 If they are not heavily coated use a vacuum cleaner or compres...

Page 27: ...w Thermal Test Slot Vaned Chamber Head Cover Removal Slot Figure 11 Exploded View of the Photo Head Ionization Intelligent Detectors a Remove the detector cover by depressing the three lock prongs on the top of the cover Figure 12 b Rotate the cover counterclockwise to remove the cover and screen assembly The CRT400 cover removal tool makes the cover removal easier c Carefully pull the screen out ...

Page 28: ...essed air to loosen and blow out any remaining debris i Press the screen back into the cover j Replace the detector cover on the sensing chamber k Rotate the detector cover clockwise to lock it in place cov scre Removable Cover for Cleaning Removable Screen P N RS14 Housing Prongs Head Cover Lock Prongs Figure 12 Exploded View of the Ion Head 6 Reinstall the detector in its housing 7 Restore syste...

Page 29: ...edures 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 Check these additional items holes or cracks in duct work near the detector air leaks where detector housing or sampling tubes are attached to duct dust accumulations in or on sampling tubes wiring terminal screw tightness ...

Page 30: ...r 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 Performed Comments Detector Test Log ...

Page 31: ... as a means of providing life safety 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 Limitations ...

Page 32: ... Products DH500 Series Intelligent Air Duct Smoke Detector 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 ...

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