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Bacharach MGS-150 Installation And Operation Manual

Gas detector
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See also: Installation Manual
Gas Detector
Installation and Operation Manual
Instruction 6309-9000
Revision 4 – October 2016
Product Leadership • Training • Service • Reliability

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Summary of Contents for Bacharach MGS-150

  • Page 1 Gas Detector Installation and Operation Manual Instruction 6309-9000 Revision 4 – October 2016 Product Leadership • Training • Service • Reliability...
  • Page 2 INSTRUMENT REQUIRE NON-WARRANTY REPAIR, YOU MAY CONTACT THE DISTRIBUTOR FROM WHOM IT WAS PURCHASED OR YOU MAY CONTACT BACHARACH DIRECTLY. IF BACHARACH IS TO DO THE REPA IR WORK, SEND THE INSTRUMENT, PREPA ID, TO BACHARACH, INC. AT THE FOLLOWING ADDRESS. Location...
  • Page 3 MGS-150 Manual ALWAYS INCLUDE Y OUR RMA #, ADDRESS, TELEPHONE NUMBER, CONTA CT NA ME, SHIPPING/BILLING INFORMA TION AND A DESCRIPTION OF THE DEFECT AS YOU PERC EIV E IT. YOU WILL BE CONTA CTED WITH A COST ESTIMA TE FOR EXPECTED REPA IRS PRIOR TO THE PERFORMA NCE OF A NY SERV ICE WORK.

  • Page 4: Table Of Contents

    MGS-150 Manual Table of Contents Section 1. Overview ....................5 1.1. General Information ....................5 1.2. Technical Specifications ..................6 Section 2. Installation and Wiring................8 2.1. General Placement Guidelines ................9 2.2. Components and Access Overview ..............9 2.3. Machinery Rooms ....................12 2.4.

  • Page 5: Section 1. Overview

    Section 1. Overview 1.1. General Information The MGS-150 is a state-of-the-art fixed gas detector which can detect a wide range of different gases. The gas sens ors can be used on a stand- alone basis or integrated into Controls or B uilding Management Systems (BMS).

  • Page 6: Technical Specifications

    MGS-150 Manual 1.2. Technical Specifications Specification Description Power Suppl y 12-24 VDC, 12-24 VAC 50/60 Hz, 2 W ma x. Power consumption (12V): 60mA (EC), 153mA (SC), 136mA (IR) Moni toring LEDs Power: Green LED Ala rm: Red LED Audible Ala rm...
  • Page 7 MGS-150 Manual NOTE: The haz ardous area EXd Gas Monitor products are designed wit h individually certified E Xd main housing enclosures and certified E XD remote or attached sensor enclosures. The main housing enclosure and its PCB assembly are als o E Xd certified, but the final EXd Ga s Monitor assemblies (main enclosure and/or sensor assembly) are not currently E XD certified, but are pending additional testing.

  • Page 8: Section 2. Installation And Wiring

    MGS-150 Manual Section 2. Installation and Wiring WARNI NG: Explosion hazard! Do not mount the MGS in an area that may contain flammable liquids, vapors, or aerosols. Operation of any electrical equipment in such an environment constitutes a safety hazard.

  • Page 9: General Placement Guidelines

    MGS-150 Manual 2.1. General Placement Guidelines NOTE: The MGS-150 should be installed plumb and level and securely fastened to a rigid mounting surface. Sensors must be located within the appropriate wire lengt hs from the central control unit (if used).
  • Page 10 MGS-150 Manual Figure 2. EC or IR Sensor Components and Wiring 6309-9000 Rev 4...
  • Page 11 MGS-150 Manual Figure 3. SC Sensor Components and Wiring 6309-9000 Rev 4...

  • Page 12: Machinery Rooms

    MGS-150 Manual Item Description Enclosure To open the standard sensor enclosure, turn the cable Acce ss clamp 1/2 turn counter-clockwise to loosen the int ernal gland nut, depress the clip on top of the enclosure and open. Reverse to close. (Note: For the IP66 enclosure, use the four bolts on the front cover.)
  • Page 13 MGS-150 Manual consider ease of access for maintenance. The size and nature of the site will help to decide which met hod is the most appropriate to use. Locations requiring the most protection in a machinery or plant room would be around compressors, pressurized storage vessels, refrigerant cylinders or storage rooms or pipelines.

  • Page 14: Refrigerated Spaces

    MGS-150 Manual • For racks or chillers pre-fitted with refrigerant sensors, these should be mounted so as to monitor the compressors. If extract ducts are fitted the airflow in the duct may be monitored. 2.4. Refrigerated Spaces In refrigerated spaces, sensors should be located in the return airflow to the evaporators on a sidewall (below head-high is preferred), or on the ceiling, not directly in front of an evaporator.

  • Page 15: Air Conditioning (Direct Systems Vrf/Vrv)

    MGS-150 Manual 2.6. Air Conditioning (Direct Systems VRF/VRV) For compliance with E N378, at least one detector shall be installed in each occupied s pace being considered and t he loc ation of detectors shall be chosen in relation to the refrigerant and they shall be located where the refrigerant from the leak will collect.

  • Page 16: Remote Sensor Head Installation

    The MGS and remote sensor must be kept together as they are calibrated together and are a matched pair. To clean, the faceplate should be lightly dusted. IMPORTANT: Do not spray the MGS-150 with cleaning or polishing aerosols. 6309-9000 Rev 4...

  • Page 17: Section 3. Housing Dimensions

    MGS-150 Manual Section 3. Housing Dimensions Figure 4. MGS-150 Standard Housing 6309-9000 Rev 4...
  • Page 18 MGS-150 Manual Figure 5. IP66 Housing with Splashguard 6309-9000 Rev 4...
  • Page 19 MGS-150 Manual Figure 6. IP66Airflow Duct Mount Housing Units = mm Figure 7. Exd Housing 6309-9000 Rev 4...
  • Page 20 MGS-150 Manual 9.8 feet (3 meters) Typical For Dimensions and Mounting Locations , See Figure 5. Figure 8. IP66 Housing with Remote Sensor Head NOTE: For the Exd Remote Sensor Head and 16.4 ft (5 m) cable, the thread varies based on the model.

  • Page 21: Section 4. Operation And Stabilization

    MGS-150 Manual Section 4. Operation and Stabilization On powering up, the MGS-150 will sense for the pres ence of gas after an initial warm-up delay of 5 minutes. The green LED will flash at 1 second intervals during the warm-up.

  • Page 22: Section 5. Configurations

    MGS-150 Manual Section 5. Configurations 5.1. Overview Function Description Time Delay A vailable on the audible alarm and relay to avoid false alarms. This is set with jumpers. The default delay is 0 minutes. You may wish to set to 15 minutes during start up.

  • Page 23: Section 6. Functional Tests And Calibration

    In applications where life safety is critical, calibration should be done quarterly (every 3 months) or on a more frequent basis. Bacharach is not responsible for setting safety practices and policies. Safe work procedures including calibration policies are best det ermined by company policy, industry standards, and local codes.
  • Page 24 MGS-150 Manual IMPORTANT: Failure to t est or calibrate t he unit in accordance with applicable instructions and with industry guidelines may result in serious injury or death. manufacturer is not liable for any loss, injury, or damage arising from improper testing, incorrect calibration, or inappropriate use of the unit.

  • Page 25: Bump Testing

    MGS-150 Manual Exposing the sensor to a gas and observing its response to the gas. The objective is to establish if the sensor is reacting to the gas and all the sensor outputs are working correctly. There are two types of bump test.
  • Page 26 MGS-150 Manual NOTE: Prior to carrying out a bump test, check and adjust the zero setting as described in the Calibration section. NOTE: P rocedures for bump test and calibration vary depending on the sensor technology used and the gas in question.
  • Page 27 MGS-150 Manual Figure 9. Gas Cylinder and Test Hardware Gas ampoules are convenient and inexpensive alternatives to using gas cylinders for bump testing. Step Bump Testing Usi ng Ga s Ampoule s Make sure that both the ampoules and the calibration beaker are clean and dry.

  • Page 28: Calibration Overview

    0V and VS using a 0-5V scale. If the sensor range is 0-1000 ppm, then 5V=1000 ppm. Bacharach offers a calibration kit that consists of a calibration gas cylinder, a flow regulation valve with flexible non-absorbent tubing and vented calibration hood. Tools required: •...

  • Page 29: Calculating Calibration Voltage

    MGS-150 Manual 6.4. Calculating Calibration Voltage Sensor out puts are linear. As long as you have a gas cylinder of known concentration you can calibrate to any desired range. Example: For a sensor range of 0-1000 ppm and a cylinder of t he target ��...

  • Page 30: Calibrating Electrochemical (Ec) Sensors

    MGS-150 Manual 6.6. Calibrating Electrochemical (EC) Sensors There are two adjustments required: zero and s pan. They are monitored at 0V and VS using a 0-5V scale. If the sensor range is 0-1000 ppm, then 5V=1000 ppm. Step Calibrating Electrochemical (EC) Sensors Locate Pot VR201 which is used to adjust the zero point.

  • Page 31: Section 7. Troubleshooting

    Symptom Possible Cause(s) • Check power supply. Check wiring. Green and Red light • MGS-150 was possibly damaged in transit. Check by installing another MGS-150 to confirm the fault. • Sensor may be disconnected from Red light on, green led printed circuit board.

  • Page 32: Eu Declaration Of Conformity

    Bacharach, Inc. NOTE: The Directives or Harmonized Standards to which this product has been evaluated may have changed. Bacharach, Inc. however continues to market this product under a presumption of conformity even though the Standards may no longer be harmonized.
  • Page 33 MGS-150 Manual 6309-9000 Rev 4...
  • Page 34 MGS-150 Manual 6309-9000 Rev 4...
  • Page 35 MGS-150 Manual 6309-9000 Rev 4...
  • Page 36 Bacharach World Headquarters - USA 621 Hunt Valley Circle New Kensington, PA 15068 Phone: 724-334-5000 • Toll Free: 1-800-736-4666 • Fax: 724-334-5001 Murco Ltd – A Bacharach Company Bacharach of Canada 114a George’s Street Lower 20 Amber Street Unit #7...

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