Simplex Non-Addressable Initiating Peripherals; Canadian Heat Detectors, 4255 Series

Listed CSA Certified Initiating Peripherals Heat Detectors 4255 Series Automatic detection of fires Compact rugged construction Rate of rise and fixed temperature principles of Large area of protection per unit ratings 3 A 6 125 VAC 1 A 6 28 VDC 0.3 A 125 VDC series heat detectors are an ultra sensitive electric designed to automatically detect the excessive created by a fire The compact simple designed units rugged and unaffected by vibration All metal parts brass or aluminum and are mounted on a durable phenolic base No exposed metal parts current Electrical contacts are all silver clad and of size line terminals and wire ways are provided in the for easy and efficient installation in either open or concealed wiring systems Two versions are Rate of Rise and Fixed Temperature and Fixed only and Fixed Temperature rate of rise and fixed temperature detector is a thermostat employing two independent of detection rate of rise and fixed rate of rise method detects fires that grow rapidly in by quickly responding to abnormally fast increases The fixed temperature method smoldering fires which build temperatures to a level at a slow rate by responding to a specific setting Temperature Only fixed temperature only version is of the same size and of construction as the rate of rise and fixed version but without the rate of rise element Additional listings may be applicable contact your local Simplex product supplier for the status detectors having the rate of rise principle of include an air chamber a vent and a flexible When the unit is heated the air in the expands The vent permits the chamber to and slowly release the expanded air If a fire the air in the chamber will expand more rapidly it can be vented This causes the diaphragm to close set of silver contacts normally open to set off a fire The rate of rise heat detector restores itself to a open contact position when the heat is dissipated remains constant heat detectors also have fixed temperature principle operation This consists of a phosphor bronze spring under tension by standard sprinkler fusible solder the heat detector is heated to the melting point of solder the spring releases and closes the silver normally open setting off a fire alarm Heat that operate by a fixed temperature principle can recognized by a small hole in the shell Units operated the fixed temperature principle cannot be reset and be replaced rate of rise and fixed temperature heat are suitable for the majority of locations They not be mounted in line with space heater blowers over stoves and ovens and other heat generating detectors are available in two fixed ratings Those rated at 135 57.2 are for most applications those rated at 200 are suitable whenever the temperature exceeds 37.7 but not 150 65.5 for extended of time Therefore 200 93.3 units are useful in those installations which lack air 9 2013 Product Selection In most fires hazardous levels of smoke and toxic gases can build up before a heat detector would initiate an F 57.2 C Rate of Rise and Fixed Temperature F 93.3 C Rate of Rise and Fixed Temperature F 57.2 C Fixed Temperature F 93.3 C Fixed Temperature Area Protected m2 ft2 m x 15 m ft x 50 ft ft x 30 ft m x 9 m ft2 m2 In cases where life safety is a factor the use of smoke detectors is recommended Normally N O Application Guidelines Temperature Conditions of Heat Detectors of TEMPERATURE CHANGES schoolrooms and industrial locations no equipment is used which could a ceiling temperature rate of rise of 9.44 TEMPERATURE CHANGES directly over stoves furnaces or in with space heater blowers etc where temperature will have a rate of rise near exceeding 15 9.44 per minute 37.8 or less 37.8 65.6 37.8 65.6 Fixed 37.8 or less Installation Reference detectors should be mounted on ceilings of the areas to protected Underwriters Laboratories of Canada allows a ft 15 m centre to centre spacing for units operating on rate of rise and fixed temperature principles one unit gives protection for a maximum of 2500 ft2 m2 of unrestricted floor and ceiling space with smooth up to 75 feet 20 m high For joisted ceilings use ft 7.5 m centres or even closer spacing units should be used where coverage appears due to structural characteristics of the protected area SIMPLEX and the product names listed in this material are marks and or registered marks Unauthorized use is strictly prohibited Fire Protection Products Westminster MA 01441 0001 USA 9 2013 2013 Tyco Fire Protection Products All rights reserved All specifications and other information shown were current as of document revision date and are subject to change without notice Details Series Heat Detectors