Simplex 4098-9845 Weatherproof Enclosure Application Addendum

4098 9845 Weatherproof Enclosure Addendum graph shown below presents the results of controlled laboratory testing performed on a typical 4098 9845 Weatherproof protecting an internally mounted duct sensor housing The external ambient air temperature of the 4098 9845 Enclosure was varied throughout its UL listed operating temperature range Temperatures were recorded the protected duct sensor housing with varying duct air velocities of air maintained between 68 and 74 F 20 to C graph illustrates how an increase in the test airflow velocity allows the airflow through the weatherproof enclosure to the duct sensor housing at its rated range as the ambient temperature of the weatherproof enclosure is varied temperatures anticipated for exterior air duct locations NOTE that for typical external air duct applications heating air would be hotter than 74 F and cooling air would lower than 68 F extending the acceptable airflow range accordingly addition adhere to the following guidelines when mounting the enclosure and duct sensor Failure to adhere to these may result in damage to the internal sensor DO NOT locate the 4098 9845 Weatherproof Duct Housing Enclosure in direct sunlight Do locate the 4098 9845 Weatherproof Duct Housing Enclosure on the shaded sheltered side of an exposed HVAC duct this is not possible or where minimal protection would be provided use a sheetmetal or equivalent canopy that ventilated shelter for the enclosure Ensure that the final mounting location will provide convenient access to the enclosure for maintenance When drilling holes within the enclosure and the duct sensor housing ensure that no particles fall into the duct sensor or electronics F C 50 C 0 C C C C airflow range with duct air between 68 to 74 F 20 to 23 C Duct Air Velocity linear ft min 1 Relationship between Ambient Air Temperature and Air Flow 2000 Simplex Time Recorder Co Westminster MA 01441 0001 USA specifications and other information shown were current as of publication and are subject to change without notice A