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• 11 N. 1000 W. <br /> THERM • TECH • ; ii i <br /> : 1 <br /> AUTOMATIC 1 DETECTORS : 1 4. <br /> vivvw.thermotechheatdetectors.com <br /> General <br /> Each model is a normally open device designed especially for fire (actual size) <br /> detection and alarm systems.These rate compensation type detectors <br /> are available in either 1350 F.or 1940 F.ratings.All four basic models <br /> are self restoring,hermetically sealed,shock and corrosion resistant, <br /> and are tamper proof.Refer to NFPA STANDARD 72,STANDARD FOR <br /> AUTOMATIC FIRE DETECTORS for application requirements,testing <br /> and maintenance. <br /> Principal of Operation <br /> All models operate on the principles of a rate compensation detec- <br /> tor.The detector consists of a high expansion aluminum tube which <br /> encases two insulation struts with opposing open constant points(see <br /> cut-away view).The high expansion sensing shell and the expan- Fine silver contact points <br /> sion struts have a different coefficient of expansion.A slow rate of <br /> temperature rise allows the heat to penetrate the inner expansion Expansion struts <br /> struts.Therefore,the tubular shell and the struts expand slowly until <br /> the total device has been heated to its rated temperature level of 1350 High expansion sensing <br /> F./1940F.At this point,the silver contact points close which initiates <br /> the alarm.When subjected to a rapid rate temperature rise there shell .040 anodized <br /> is not as much time for heat to penetrate the inner strut.The rapid <br /> lengthening of the shell allows the struts to come together at a lower Heat control sleeve <br /> level which compensates for thermal lag inherent in conventional LULI <br /> fixed temperature detectors.When the surrounding air temperatures Setting screw <br /> goes below the rated temperature level,the shell contracts which <br /> forces contacts to open,thus automatically resetting the detector. Devcon hermetic seal <br /> Dimensions(Model 302):Total overall length 4 t/a <br /> Special Considerations Base Diameter:2". <br /> Temp. Rating OF. Max Ceiling Temp.°F. <br /> 1 115 <br /> 194 155 Approvals/Listings <br /> 94 <br /> Signaling <br /> Detectors are not directionally effected,can be mounted horizontally or vertically. Detectors have a smooth ceiling UL rating of 50'x 50' t Underwriters' Laboratories <br /> Listed <br /> (2500 sq.ft.)on 8 to 10 ft.ceilings. Detectors,hub covers,or outlet <br /> boxes must never be installed in direct sunlight.Refer to NFPA STAN- <br /> DARD 72 for spacing and other considerations.For further information LZ Factory Mutual <br /> refer to www.thermotechheatdetectors.com Approved <br /> IN T <br /> Electrical Rating �� California State Fire Marshall.Listing No.7270-0021:001 <br /> Voltage Current <br /> NEIV TOIiK CITY <br /> MEA Acceptance#193-03-E <br /> 6-125 VAC 5 amps <br /> 6-25 VAC 1 amp W115 1c <br /> 125 VDC 0.5 amp <br />