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Owner's Manual for CERBERUS PYROTRONICS models including: Thermal Fire Detectors Explosion Proof Models, Thermal Fire, Detectors Explosion Proof Models, Explosion Proof Models
Cerberus Pyrotronics Explosion Proof Thermal Fire Detector (Detect-A- Fire) 6128 - Fire Alarm Resources - Free fire alarm PDF manuals, documents, installation instructions, and technical specifications
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DocumentDocumentThermal Fire Detectors Exp lo sio n Pro o f Mo d els ENG INEER AND ARC HITEC T SPEC IFIC ATIO NS DETECT-A-FIRE MODELS l Explosion Proof l Self-Restoring Detector Element l Models Available in both Normally Open and Normally Closed Contacts in a Wide Range of Temperature Settings l Factory Set and Hermetically Sealed in Stainless Steel Shell l Listed and FM Approved as Fenwal Model Series 27120 and 27121 Manufactured for Cerberus Pyrotronics by Fenwal Introd uc tion Detect-A-Fire explosion proof detectors are of the rate compensated type and are designed for use with either standard Cerberus Pyrotronics systems or other commercially available fire alarm systems. The detector element in all models is self-restoring after operation. The DetectA-Fire explosion proof models can be supplied with normally closed contacts at 140, 160, 190, 210, 225, 275, 325, 360 or 450°F settings or with normally open contacts at 140, 160, 190, 210, 275, 325, 360, 450, 500, 600, or 725°F settings. These detectors are only explosion proof when mounted in an approved explosion proof junction box. Princ ip le of Op era tion Detect-A-Fire units have met with wide acceptance because they are designed with rate compensation. This provides a unique advantage over both standard fixed temperature and rate-of-rise types of detectors because only the Detect-A-Fire unit accurately senses the surrounding air temperature regardless of the fire growth rate. At precisely the predetermined danger point the system is activated. The secret of the unit's sensitivity is in the design. The outer shell is made of a rapidly expanding alloy which closely follows changes in surrounding air temperature. The inner struts are made of a lower expanding alloy. Designed to resist thermal energy absorption and sealed inside the shell, the struts follow temperature changes more slowly. A slow rate fire will heat the shell and struts together. At the "set point" the unit will trigger, actuating the alarm or releasing the extinguishant. A transient rush of warm air up to 40°F/min. may expand the shell, but not enough to trigger the unit. In ignoring transient warm air excursions, the Detect-A-Fire unit virtually eliminates false alarms prevalent with rate-of-rise devices. If a fast rate fire starts, then the shell will expand rapidly. The struts will close, actuating the alarm or releasing the agent. The faster the fire rate of growth, the sooner the alarm. Eng ineer a nd Arc hitec t Sp ec ific a tions The explosion proof thermal fire detector shall be a DetectA-Fire explosion proof model, Fenwal (__M_o_d_e_l _#__), also for purchasing purposes referred to as Cerberus Pyrotronics (___M_o_d_el_#__), and shall be of the rate compensated type. The explosion proof detector shall have a self-restoring element and shall be factory set and hermetically sealed in stainless steel. These detectors shall be mounted in an approved explosion proof junction box. The explosion proof detectors must be UL listed and FM approved. 6128 CATALOG NUMBER firealarmresources.com Model Cross-Reference Chart Normally Open Contact Normally Closed Contact °F °F Color Setting Tolerance Coding 140 (+7,-8) Yellow 160 (+7,-8) Yellow 190 (+7,-8) White 210 (+7,-8) White 225 (+7,-8) White 275 (+/-10) Blue 325 (+/-10) Red 360 (+/-10) Red 450 (+/-15) Green 500 (+/-15) Orange 600 (+/-20) Orange 725 (+/-25) Orange Fenwal Model 27121-140 27121-160 27121-190 27121-210 27121-225 27121-275 27121-325 27121-360 27121-450 27121-500 27121-600 27121-725 Cerberus Pyrotronics Model DT-140EP DT-160EP DT-190EP DT-210EP DT-225EP DT-275EP DT-325EP DT-360EP DT-450EP DT-500EP DT-600EP DT-725EP Fenwal Model 27120-140 27120-160 27120-190 27120-210 27120-225 27120-275 27120-325 27120-360 27120-450 Cerberus Pyrotronics Model * * * * * * * * * * Normally Closed Contact Detectors do not operate with any Cerberus Pyrotronics Control Panels. These Normally Closed Contact Detectors are offered for special applications only. Ord ering Inform a tion Refer to the chart above. When placing a purchase order refer to the Cerberus Pyrotronics model number. The format of the model number is: DT- (the temperature setting desired) EP. For example, if you wish to order a normally open 140°F detector, you would order model numbers DT-140EP. The Cerberus Pyrotronics model numbers DT-140EP and DT-190EP (both normally open) are stocked items. All other models are special orders. Contact Cerberus Pyrotronics Customer Service Department for assistance. Shipping weight for these items is approximately one pound. Dim e nsio ns Mounting a nd Insta lla tion Inform a tion The explosion proof (EP) models attach to the threaded hub cover of listed explosion proof junction boxes such as Killark Series, UL or equal. The EP models should not be installed in outdoor or other wet locations. °F Setting and Tolerance 140+7°/-8° 160+7°/-8° 190+7°/-8° Fenwal 210+7°/-8° 27120 Series 225 7°/-8° 275 10° 325 10° 360 10° 450 15° 500 15° 600 20° 725 25° Color Coding Yellow Yellow White White White Blue Red Red Green Orange Orange Orange Spacings (in Feet) See Note B UL FM ULC 50 25 50 25 25 25 50 25 50 25 25 50 25 25 50 25 25 50 50 25 50 25 25 50 25 25 50 50 25 50 N/A 25 50 N/A 25 50 Fenwal 27121 Series Hazardous Locations Applications Class I, Groups B, C and D; Class II, Groups E, F and G; CONSTRUCTION: Units have a stainless steel sensing shell and a brass mounting head. Detector Model Series 27120 27121 Fitting Required for UL & ULC Listings and FM Approval Mount detector to a suitably listed fitting in accordance withthe National Electric Code and/or local authority having jurisdiction Fenwal Model No. Contacts 27120 Series Normally Closed 27121 Series Normally Open **Electrical Rating (Resistive Only) 5 Amps., 125 VAC 0.5 Amps., 125 VDC 5 Amps., 125 VAC 0.5 Amps., 125 VDC 2.0 Amps., 24 VDC 1.0 Amps., 48 VDC Cerberus Pyrotronics Cerberus Pyrotronics 8 Ridgedale Avenue 50 East Pearce Street Cedar Knolls, NJ 07927 4/97 Richmond Hill, Ontario Tel: (201) 267-1300 5M L4B, 1B7 CN FAX: (201) 397-7008 CPY-IG Tel: (905) 764-8384 Website: www.cerbpyro.com Printed in U.S.A. FAX: (905) 731-9182 firealarmresources.com April 1997 Supersedes sheet dated 1/95