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