Autocall Accessories A4098-9845 Weatherproof Enclosure Technical Presentation

A4098 9845 Weatherproof Enclosure Application Addendum A4098 9845 Weatherproof Enclosure graph shown below presents the results of controlled laboratory testing performed on a typical A4098 9845 Weatherproof Enclosure protecting internally mounted duct sensor housing The external ambient air temperature of the A4098 9845 Weatherproof Enclosure was varied throughout UL listed operating temperature range Temperatures were recorded within the protected duct sensor housing with varying duct air velocities of air between 68 and 74 F 20 to 23 C graph illustrates how an increase in the test airflow velocity allows the airflow through the weatherproof enclosure to maintain the duct sensor at its rated range as the ambient temperature of the weatherproof enclosure is varied throughout temperatures anticipated for exterior air locations For typical external air duct applications heating air would be hotter than 74 F and cooling air would be lower than 68 F extending the airflow range accordingly 1 Relationship between Ambient Air Temperature and Air Flow Guidelines addition adhere to the following guidelines when mounting the enclosure and duct sensor Failure to adhere to these guidelines may result in to the internal sensor DO NOT locate the A4098 9845 Weatherproof Duct Housing Enclosure in direct sunlight Do locate the A4098 9845 Weatherproof Duct Housing Enclosure on the shaded sheltered side of an exposed HVAC duct Where this is possible or where minimal protection would be provided use a sheetmetal or equivalent canopy that provides ventilated shelter for the 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 head or electronics Rev A C 20 C 32 C 122 0 C 140 50 C 60 C 158 F 70 Enclosure External Ambient Air Temperature30045060075090010501200Recommended airflow range with duct air temperature between 68 to 74 F 20 to 23 C Recommended Duct Air Velocity linear ft min firealarmresources com 2017 Johnson Controls All rights reserved All specifications and other information shown were current as of document revision and are subject to change without notice Additional listings may be applicable contact your local Autocall supplier for the latest status Listings and approvals under Tyco Fire Security GmbH and the product names listed in this material are marks and or registered marks Unauthorized use is strictly prohibited NFPA 72 and National Alarm Code are registered trademarks of the National Fire Protection Association NFPA Rev A