Bacharach MGS-550 User Manual

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Contents

Bacharach MGS-550 User Manual Manual pdf 11 page image

MGS-550 Fixed Gas DetectorP/N: 1100-1000 Version 1 11SECTION 3. INSTALLATION3.1 General Information for InstallationEvery detail of installation site selection is critical to ensure overall system performance andeffectiveness. Strict compliance and considerable thought must be given to every detail of the installationprocess, including, but not limited to the following:• Regulations as well as local, state, and national codes that govern the installation of gas monitoringequipment• Electrical codes that govern the routing and connection of electrical power and signal cables to gasmonitoring equipment• The full range of environmental conditions to which the instruments will be exposed• The physical characteristics of the gas or vapor to be detected• The specifics of the application (e.g., possible leaks, air movement/draft, etc.)• The degree of accessibility required for maintenance purposes• The types of optional equipment and accessories that will be used with the system• Any limiting factors or regulations that would affect system performance or installations• Wiring details, including the following.o The general purpose enclosure provides four M20 x 1.5 mm openings, which can be used forfield wiring, direct attachment of a sensor, or wiring of a remote sensor.o The explosion-proof enclosure provides four M20 x 1.5 mm openings, which can be used for fieldwiring, direct attachment of a sensor, or wiring of a remote sensor.o Unused openings must be closed with a suitable plug and gasket, maintaining the IP or Ex drating.o Secondary circuit must be supplied from an isolating source (not applicable for relay circuits).o The wiring for the relays must be selected and fused according to the rated voltages, currents,and environmental conditions.o If stranded conductors are used, a ferrule should be used.o To improve RFI immunity in extreme environments, it might be necessary to ground the shield ofthe communications cable at the PLC, GDA controller, front-end controller, or BuildingManagement System (e.g., the chassis, the ground bus-bar, etc.).3.2 Installation Restrictions• The installation location must have appropriate supply power available for the instrument (i.e., 19.5 to28.5 VDC or 24 VAC). Refer to section 9: Technical Data on page 62. This ultimately determines thedistance the instrument can be mounted from the controller or power supply.WARNINGThe MGS-550 must be powered by either:• a suitable UL/CSA/IEC 60950 certified power supply that is isolated from linevoltage by double insulation, or• an appropriately rated UL listed/CSA/IEC Class 2 transformer.• The instrument accepts wire sizes of 16 AWG (1.5 mm 2) to 20 AWG (0.5 mm 2).• Depending on the configuration, use at least a shielded, multi-conductor cable.• The instrument must not be exposed to radiant heat that will cause the temperature to rise beyondthe limits stated in section 9: Technical Data on page 62. The use of a reflecting shield isrecommended.• The enclosure is weatherproof within environmental specifications and suitable for outdoorinstallation.• Each instrument must be installed and operated in an environment that conforms to the specificationslisted in section 9: Technical Data on page 62.www. .com information@itm.com1.800.561.8187