EFL (Electric Fuse Link)

Installation InstructionsDocument No. 129-403January 21, 2005OpenAir Electronic Fusible LinkEA1127R1Product DescriptionThe Electronic Fusible Link (EFL) is a heat responsive deviceused with the Siemens OpenAir UL listed fire and smokecontrol damper actuator.Upon exceeding the temperature limits of the EFL modelordered and installed, the EFL cuts power to the electronicdamper actuator and the actuator’s spring return mechanismcloses the damper.NOTE:The EFL must be factory-installed. The UL ratingcarried by the specific damper and actuator isassigned as an assembly and cannot be added inthe field.Replacement EFLs may be field-installed with local authorityapproval.Contents• Electronic Fusible Link• 2 – 1.25-in (31,75 mm) hex head self-drilling screwsProduct NumbersASK79.165ASK79.212ASK79.250ASK79.350NOTE:165°F (74°C)212°F (100°C)250°F (121°C)350°F (177°C)The EFL is compatible only with OpenAirGNDxxx.xU/F UL listed fire and smoke damperactuators.Expected Installation Time15 minutesPrerequisitesAppropriate OpenAir GND series damper actuator.OperationWhen the EFL detects that its temperature settings isexceeded, the power to the electronic damper actuator isshut off and the spring mechanism closes the damper.The manual override reset button (See Figure 1) on theEFL can be pressed when the temperature has cooledbelow the EFL setpoint. The EFL device will again beoperational.ManualOverride/ResetCAUTION:Before resetting any sensor, a carefulinspection of the damper, damperactuator, and sensor should be made.Damage to the temperature sensor willresult in loss of damper control.3/8-inch (9.5 mm)Flexible ConduitOpeningEFL BaseWarning/Caution NotationsWARNING:CAUTION:Personal injury/loss of life mayoccur if you do not follow theprocedures as specified.Equipment damage, or loss of datamay occur if you do not follow theprocedures as specified.EA1125R1Figure 1. Parts Description.Required Tools• 1.25-inch (32 mm) drill or hole punch• 1/4-inch (6 mm) Hex driveItem number 129-403, Rev. 013 Page 1 of 3

Document No. 129-403Installation InstructionsJanuary 21, 2005InstallationInternal MountingFor internal mounting, the reset button must protrudethrough a ∅ 3/8-inch (9.2 mm) relief hole providingoperator access for resetting the EFL.ÿ 3/8 inch hole(9.2 mm)EA1166R1Figure 2. The EFL and OpenAir GNDxxx.xU/F Actuator.EA1194R1CAUTION:Duct Wall orDamper SleeveFailure to provide a relief hole willkeep the reset button pressedagainst the duct wall or dampersleeve and the system will exhibit afalse failure.ÿ 3/8 inch hole(9.2 mm)EA1130R1EA1129R1NOTE:Notice position of top clip beforeattempting to couple actuator with EFLsensor.EAn1195R1Duct Wall orDamper SleeveFigure 4. EFL Reset Button Relief Hole.Figure 3. Proper Clip PositioningPage 2 of 3Siemens Building Technologies, Inc.

Document No. 129-403Installation InstructionsJanuary 21, 2005External MountFor an external mount make a ∅ 1-1/4-inch (32 mm)hole in the duct wall or damper sleeve. The sensor willprotrude into the duct or damper for proper temperaturesensing.Dimensions3.3(84,8).16(4) 1.7(42,3)ÿ 1.25 inch hole(32 mm)3.4(85,8)2.8(71,1)2.5(62,8)EA1197R1Duct Wall orDamper Sleeve1.25(32)EA1196R1EA1126R1Figure 6. Dimensions in Inches (mm).Figure 5. Providing Proper Sensor TemperatureDetection Access.Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models asdesign improvements are introduced. OpenAir is a tradmark of Siemens Building Technologies, Inc. Other product or company names mentioned hereinmay be the trademarks of their respective owners. © 2005 Siemens Building Technologies, Inc.Siemens Building Technologies, Inc.1000 Deerfield ParkwayBuffalo Grove, IL 60089-4513U.S.A.Your feedback is important to us. If you have commentsabout this document, please send them totechnical.editor@siemens.comDocument No. 129-403Country of Origin: USPage 3 of 3