TRANSPORTATION APPLICATIONS Application Note 3000 Series Thermostats in Vehicle Fire Suppression Applications BACKGROUND When the thermostat ambient temperature reaches the rated A fire resulting from a vehicle collision may lead to death temperature, the switch contacts close, completing the because it becomes impossible to escape the burning vehicle. electrical circuit which triggers the system actuator. When the An effective fire suppression system helps to reduce fatalities thermostat cools, the contacts reopen, which resets the in these situations. thermostat to its normal operation condition. SOLUTION At least one thermostat is installed in each protected area of Honeywell manufactures the 3000 Series Thermostats (see the vehicle (see Figure 1). The four-conductor configuration Table 1), a range of rugged, sealed thermostats, that signal allows continuous integrity monitoring of all circuits connecting when a certain temperature has been reached. In an automatic the thermostats. fire suppression system, the thermostat signals the system to discharge in the event of a fire. Table 1. 3000 Series Vehicle Fire Suppression Thermostat 3000 Series Vehicle Fire Suppression Thermostat Features and Benefits Stainless steel housing provides enhanced resistance to corrosion and harsh, under-the-hood chemicals Sealed construction designed to prevent water ingress Configurable operating point may be tailored to application requirements up to 232 C 450 F Enhanced response for reduced deployment time Enhanced reliability for potentially maintenance-free operation Flexible mounting bracket allows multiple installation sites for the same product Figure 1. Fire Suppression System Block Diagram Sensing and Control 3000 Series in Vehicle Fire Suppression Applications WARNING WARNING PERSONAL INJURY MISUSE OF DOCUMENTATION DO NOT USE these products as safety or emergency stop The information presented in this application note is for devices or in any other application where failure of the reference only. Do not use this document as a product product could result in personal injury. installation guide. Failure to comply with these instructions could result in Complete installation, operation, and maintenance death or serious injury. information is provided in the instructions supplied with each product. Failure to comply with these instructions could result in WARRANTY/REMEDY death or serious injury. Honeywell warrants goods of its manufacture as being free of defective materials and faulty workmanship. Honeywells standard product warranty applies unless agreed to otherwise SALES AND SERVICE by Honeywell in writing please refer to your order Honeywell serves its customers through a worldwide network acknowledgement or consult your local sales office for specific of sales offices, representatives and distributors. For warranty details. If warranted goods are returned to Honeywell application assistance, current specifications, pricing or name during the period of coverage, Honeywell will repair or replace, of the nearest Authorized Distributor, contact your local sales at its option, without charge those items it finds defective. The office or: foregoing is buyers sole remedy and is in lieu of all other warranties, expressed or implied, including those of E-mail: info.sc honeywell.com merchantability and fitness for a particular purpose. In no event shall Honeywell be liable for consequential, special, or indirect Internet: www.honeywell.com/sensing damages. Phone and Fax: While we provide application assistance personally, through Asia Pacific +65 6355-2828 our literature and the Honeywell web site, it is up to the +65 6445-3033 Fax customer to determine the suitability of the product in the application. Europe +44 (0) 1698 481481 +44 (0) 1698 481676 Fax Specifications may change without notice. The information we Latin America +1-305-805-8188 supply is believed to be accurate and reliable as of this printing. +1-305-883-8257 Fax However, we assume no responsibility for its use. USA/Canada +1-800-537-6945 +1-815-235-6847 +1-815-235-6545 Fax Sensing and Control Honeywell 1985 Douglas Drive North 008096-1-EN IL50 GLO Printed in USA Golden Valley, MN 55422 March 2009 www.honeywell.com/sensing Copyright 2009 Honeywell International Inc. All rights reserved.