Fenwal Controls DETECT-A-FIRE Detection And Release Devices

DETECT-A-FIRE Detection and Release DevicesF-12-0-001June 2020FEATURES Repeatable - self-restoring, nothing to replace, testable Versatile - various temperature settings available Durable - long lasting stainless steel shell Economical - wide spacings reduce installation costs Factory set Internal contact area hermetically sealed in stainless steel shell ROHS CompliantAPPLICATIONS Protection of schools, factories, offices, libraries,or other non-residential buildings Power generation Gas station islands Paint spray booths Range hoods Engine compartmentsDESCRIPTIONDETECT-A-FIRE (D-A-F) detectors are the "heart" of many fire protection systems. The highly reliable D-A-F has been the standard forover 75 years. The D-A-F is used for signaling overheat or fire conditions. In the vast majority of applications, the D-A-F provides the initial heat sensing that is used to activate suppression systems using clean agent, CO2, inert gases, wet or dry chemicals or water.D-A-F detectors are widely accepted, because they are designed with rate compensation. This provides a unique advantage over bothfixed temperature and rate-of-rise types of detectors because the D-A-F detector accurately senses the surrounding air temperatureregardless of the fire growth rate. At the pre-determined set point, the system is activated.Fixed temperature detectors must be completely heated to alarm temperature and therefore a lag in response time may occur with a fastrate fire. Rate-of-rise devices, on the other hand, are triggered by the rate of increase in ambient temperature and are subject to falsealarms caused by harmless, transient thermal gradients such as the rush of warm air from process ovens.The key to the detector's sensitivity is in the design (Figure 1). The outer shell is made of a rapidly expanding alloy which closely followschanges in surrounding air temperature. The inner struts are made of a slower expanding alloy. Designed to resist thermal energyabsorption and sealed inside the shell, the struts follow temperature changes more slowly.A slow rate fire (Figure 2) will heat the shell and struts together. At the "set point", the detector will trigger, actuating the alarm or releasingthe extinguishant.A transient rush of warm air up to 40 F/min. may expand the shell, while not triggering the detector. By ignoring transient warm air excursions, the D-A-F detector virtually eliminates false alarms prevalent with rate-of-rise devices.If a fast rate fire (Figure 3) starts, the shell will expand rapidly. The struts will close, actuating the alarm and/or releasing the agent. Thefaster the fire rate of growth, the sooner the D-A-F detector will react.Figure 1. ReadyFigure 2. Slow Fire1Figure 3. Fast Fire

VERTICAL DETECT-A-FIRE DETECTOR SPECIFICATIONSVertical D-A-F detectors are designed for use in both "ordinary" or "hazardous" locations. For "ordinary" use, they may be mounted toany approved junction box with 7/8" diameter opening by using 1/2-14 NPT mounting nuts. The device may be wired in or out of conduit, depending on local preferences and codes. To facilitate supervision of system wiring, four lead wires are provided on normally openvertical detectors (that close on temperature rise). When mounted in a appropriately classified mounting box (i.e. Figure 7), detectorsare Underwriters Laboratory and Underwriters Laboratory of Canada listed, and FM Approved for hazardous locations.VERTICAL MODELSTable 1: Model Numbers 27121, 28021, 27120*, 28020* FSetting FTolerance CSetting CTolerance140 7/-860160 7/-8190Spacing (in feet)RTIColorCodingULULCFM 4/-5505020V-FastBlack71 4/-5252520V-FastBlack 7/-888 4/-5505025V-FastWhite210 7/-899 4/-5255025V-FastWhite225 7/-8107 4/-5255025V-FastWhite275 10135 6255025V-FastBlue325 10163 6505025V-FastRed360 10182 8255030V-FastRed450 15232 10255030V-FastGreen500** 15260 10505030V-FastOrange600** 20316 12N/A5030V-FastOrange725** 20385 12N/A5030V-FastOrangeNotes: For clean agents or CO2 suppression systems, ceiling spacing is 20ft. apart unless otherwise specified. For NFPA Guidelines on ceiling height compensation, see Table 7. *27120 and 28020 are normally closed devices and do not meet the requirements of NFPA-72 for useas initiating devices (they are 2-wire devices). *27120 and 28020 are not listed by FM with RTI. ** Not available for Normally Closed detectorsFigure 4. Hexagonal HeadTable 2: Vertical D-A-F SpecificationModel NumberHead Material27120-0Brass27120-22Stainless Steel27121-0Brass27121-20Stainless Steel28020-3Stainless SteelContact OperationElectrical Rating(Resistive Only)Normally Closed(Open on Rise)5.0 Amps 125 VAC0.5 Amps 125 VDCNormally Open(Close on Rise)5.0 Amps 125 VAC0.5 Amps 125 VDC2.0 Amps 24 VDC1.0 Amps 48 VDCNormally Closed(Open on Rise)5.0 Amps 125 VAC0.5 Amps 125 VDCNormally Open(Close on Rise)5.0 Amps 125 VAC0.5 Amps 125 VDC2.0 Amps 24 VDC1.0 Amps 48 VDC28021-512-200001-00X*Stainless SteelFigure 5. Coupling HeadApproximate weight: 5 oz. All shell material is Stainless Steel. All Stainless Steel is Type 300.* Specialty product with limited availability.2F-12-0-001Effective: June 2020

HORIZONTAL DETECT-A-FIRE DETECTOR SPECIFICATIONSHorizontal D-A-F detectors are designed for locations where appearance is a factor. The low-profile, functional designlends physical protection of the detector while making it suitable for commercial, industrial, mercantile public buildings,institutions, and marine applications in non-hazardous locations (those classified as "ordinary" under the National ElectricCode). Flush mounted detectors are designed to fit standard 4-inch octagonal electric boxes and surface mounting detectors are designed to mount directly on ceilings or on 4-inch electrical junction boxes. Canadian Electrical Codes requiresmounting only to an electrical junction box.Horizontal ModelsTable 3: Model Numbers: 27021-0, 27021-1, 27020-0*, 27020-1* FSetting FTolerance140160Spacing(in feet)RTIColorCodingBlackULULCFM 7/-8505020Quick 7/-8252520QuickBlack190 7/-8505025FastWhite210 7/-8255025FastWhite225 7/-8255025FastWhite275 10255025FastBlue325 10505025FastRed *27020-0 and 27020-1 are normally closed devices and do not meet therequirements of NFPA-72 for use as initiating devices (they are 2-wire devices). *27020-0 and 27020-1 are not listed by FM with RTI.Table 4: Horizontal D-A-F SpecificationsModel NumberMounting StyleContact OperationElectrical Rating(Resistive Only)27020-0Flush Mount27020-1Surface MountNormally Closed(Open on Rise)5.0 Amps 125 VAC0.5 Amps 125 VDC27021-0Flush Mount27021-1Surface MountNormally Open(Close on Rise)5.0 Amps 125 VAC0.5 Amps 125 VDC2.0 Amps 24 VDC1.0 Amps 48 VDCApproximate weight: 10 oz.F-12-0-001Effective: June 20203Figure 6. Horizontal DetectorsNote:Horizontal D-A-F detectors areequipped with connector blocks inplace of leadwires.

HORIZONTAL AND VERTICAL DETECT-A-FIRETable 5: D-A-F Response Time Index (RTI) and SpacingModelNo.Configuration27021-0HorizontalFlush Mount27021-1HorizontalSurface Mount27021-0HorizontalFlush Mount27021-1HorizontalSurface Mount27121-0VerticalBrass Head27121-20VerticalStainless Head28021-5Vertical StainlessCoupling HeadContactOperationTemperature(Set Point)Response TimeIndex (ft-s) 1/2RTIClassificationRTI RatedSpacingOld RatedSpacingNormally Open(Close on Rise)140 F (60 C), 160 F (71 C)110Quick(20 X 20) ft(6 x 6) m(25 x 25) ft(8 x 8) mNormally Open(Close on Rise)190 F (88 C), 210 F (99 C),225 F (107 C), 275 F (135 C),325 F (163 C)140Fast(25 x 25) ft(8 x 8) m(25 x 25) ft(8 x 8) mNormally Open(Close on Rise)140 F190 F225 F325 F450 F600 F99 (140 F, 160 F)148 (190 F, 210 F,225 F, 275 F, 325 F,360 F, 450 F, 500 F,600 F, 725 F)V-Fast(30 X 30) ft(9 x 9) m(25 x 25) ft(8 x 8) m(60 C), 160 F (71 C),(88 C), 210 F (99 C),(107 C), 275 F (135 C),(163 C), 360 F (182 C),(232 C), 500 F (260 C),(316 C), 725 F (385 C)Note: Spaces shown are distances between detectors on smooth ceilings, the distances from partitions or walls would be half that shown.Authority Having Jurisdiction (AHJ) should be consulted before installation.DETECT-A-FIRE MOUNTINGD-A-F detectors are not position sensitive. Horizontal and vertical detectors refer to the most common mounting configuration for thatdetector. However each type can be mounted either horizontally or vertically depending on the application and installation requirements.Table 6: Mounting and Hazardous Location ClassModel Number(Vertical 5Class I, GroupsA, B, C and D;Class II, GroupsE, F and G27120-027121-0Class I, GroupsB, C and D;Class II GroupsE, F and GTable 7: Derating Factor for Ceiling HeightHeat Detector Spacing Reduction Based on Ceiling HeightFitting requiredfor UL & ULCListing and FMApprovalCeiling Height AbovemMount detector to asuitable listed fittingin accordance withNational ElectricCode and/or localauthority havingjurisdiction.Up to and This table outlines the derating factor required depending on ceiling heightbased on NFPA 72 guidelines for D-A-F detector installation.CONSTRUCTION Stainless steel shell sensing element. Cold rolled steel mounting facility. Off-White finish.#18 AWG Teflon insulated wire is used on detectors exposed to temperatures up to 375 F.#16 AWG TGGT insulated wire is used on detectors exposed to temperatures above 375 F.MODIFICATIONS Add ULC Label to any temperature setting.Add fluorocarbon coating for better corrosion resistance on select models and temperatures.(Models 27120-22, 27121-20, 28020- 3, 28021-5. Maximum temperature is 500 F.)Add extended leadwires on select models and temperatures.4F-12-0-001Effective: June 2020

TEMPERATURE SETTING SELECTIONTo avoid nuisance activations, Fenwal Controls strongly suggests selecting a D-A-F detector with a temperature setting a minimum of100 F above the maximum ambient expected temperature.DEVICE SELECTIONThe table below shows three categories of fire detection devices and their relative response levels for reaction to three different rate-ofrise conditions. Consult the AHJ for specific applications.Table 8: Device Selection for Rate-of-Rise ConditionsDevice TypeUnder 10 /MinBetween 10-40 /MinOver 40 /MinD-A-F Rate CompensatedDetectorFirstFirstSecondbut at selected protection levelFixed Temp. DetectorSecondSecondThirdRate-of-Rise DetectorThirdThirdFirstbut may be a false alarmAGENCY LISTINGSD-A-F detectors are UL and ULC listed and FM Approved as fire detection thermostats (close on temperature rise) and as releasing devices(open on temperature rise).Table 9: Agency ApprovalsAgencyFile 341-EOrdinary and HazardousFMJ.I. OV2HO.AEHazardousFM17302OrdinaryULS2410Ordinary (600 & 725 F)ULE89599Hazardous (600 & 725 F)CEIEC 60947-5-1—NOTES: D-A-F detectors are temperature preset at the factory. For corrosive environments, care should be taken to protect the D-A-F detector to obtain optimal performance and maximumlife. Consult factory for fluorocarbon coating option. For field wiring requirements to connect to D-A-F, please refer to the installation instructions. Per UL521 requirements - low temperature exposure test is - 22 F (-30 C) D-A-F detectors are designed for long life expectancy, however due to various field conditions it is required that the detectorsbe tested annually per NFPA guidelines or local fire codes. Replace D-A-F detector after any fire or heat related event, any mechanical damage, or after 10 years of continuous service. D-A-F detectors are CE Listed. The product family has been evaluated in accordance with IEC 60947-1 and IEC 60947-5- 1, andis documented under Intertek Report No. 102294754 BOX-001 as an overheat detector. Detectors have a rated insulation andimpulse voltages of 1500 VAC.F-12-0-001Effective: June 20205