TM 10-6665-297-13&P2-1LOCATIONOFDETECTORS5.Corrosivegases:The destructive effects of corrosive gases may in some cases be minimized bylocating the detector in a protected area and conditioning samples to reduce corrosiveness as theyare drawn by vacuum to the detectors. Where moisture or liquid-type line filters are used, specialcare should be taken during installation to ensure that such devices are accessible for periodicservicing if required.6.Water,moisture,dust,anddirt:Detectors should be mounted where water cannot enter and fillthe housing to prevent exposure of the sensor element to air. Likewise, exposure to moisture, dust,and dirt should be minimized by locating detectors away from points where large amounts of suchcontaminants fill the air. Small overhanging or surrounding covers may be devised to protectdetectors from the intrusions of dust and dirt in severe environments. A special moisture-proofdetector (Model #0023-7317) should be installed where extreme humidity presents a specialproblem.2-2LOCATION OF CONTROL UNITSIf possible, locate control modules or enclosures in dry, clean, nonhazardous areas; ideally, in plantengineer's control room or other place where temperature, moisture, corrosive and explosiveatmospheres, or other conditions will not endanger personnel or hinder the maintenance and operationof the equipment. If a source of compressed air is readily available for cabinet purging, W- series(wall-mount) enclosures may be located in Division 2 hazardous locations. * The CD800X (explosion-proof housing) may be safely located in Division 1, Groups B, C, and D, hazardous environments. Inany case, length of wire should be considered with respect to installation cost. If fans, sprinklers, doorclosers, ovens, or other devices are to be controlled by the control module relays, the length of thecontrol wiring for these purposes should also be considered.2-3LOCATION OF WARNING DEVICESRemote annunciators such as bells, buzzers, lamps, etc., should be located where they may be readilyseen or heard by personnel responsible for remedial actions, and preferably should be near the controlcabinet where the nature of the condition and the appropriate response may be more readily perceived.Alarm devices should also be located in or near detectors to alert all personnel in the vicinity of analarm. Audible alarms should be installed not less than one foot from the ceiling and, whereverpossible, not less than eight feet from the floor.2-4CONTROL MODULE INSTALLATIONControl modules and control module assemblies are installed in accordance withWhere permitted by governing code enforcement authorities.23-96177/1/762-4
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