M9208-Bxx-3 Series On/Off Electric Spring Return Actuators Installation Instructions1 Refer to the QuickLIT website for the most up-to-date version of this document.ApplicationsThe M9208-Bxx-3 Series On/Off Electric SpringReturn Actuators are direct-mount actuators that operate on AC24V power at 50/60Hz, DC24V power, AC120V power at 60Hz, or AC230V power at 50/60Hz. These bidirectional actuators do not require a damper linkage, and are easily installed on round shafts from5/16to5/8in.(8to16mm) or square shafts from1/4to1/2in.(6to12mm) using the standard shaft clamp included with the actuator. An optional M9208-600 Large Coupler Kit is available for round shafts from 1/2 to 3/4in.(12to19mm) or square shafts from 3/8to9/16in.(10to14mm).A single M9208-Bxx-3 Series On/Off Electric SpringReturn Actuator provides 70lb·in.(8N·m) running and spring return torque. Integral line voltage auxiliary switches, available only on the M9208-xxC-3 models, indicate end-stop position, or performswitching functions within the selected rotation range.IMPORTANT:Use this M9208-Bxx-3 Series On/Off Electric Spring Return Actuator only to control equipment under normal operating conditions. Where failure or malfunction of the electric actuator could lead to personal injury or property damage to the controlled equipment or other property, additional precautions must be designed into the control system. Incorporate and maintain other devices, such as supervisory or alarm systems or safety or limit controls, intended to warn of or protect against failure or malfunction of the electric actuator.IMPORTANT : Utiliser ce M9208-Bxx-3 Series On/Off Electric Spring Return Actuator uniquement pour commander des équipements dans des conditions normales de fonctionnement. Lorsqu'une défaillance ou un dysfonctionnement du electric actuator risque de provoquer des blessures ou d'endommager l'équipement contrôlé ou un autre équipement, la conception du système de contrôle doit intégrer des dispositifs de protection supplémentaires. Veiller dans ce cas à intégrer de façon permanente d'autres dispositifs, tels que des systèmes de supervision ou d'alarme, ou des dispositifs de sécurité ou de limitation, ayant une fonction d'avertissement ou de protection en cas de défaillance ou de dysfonctionnement du electric actuator.M9208-Bxx-3 Series On/Off Electric Spring Return ActuatorsInstallation InstructionsM9208-BAA-3, M9208-BAC-3, M9208-BDA-3,M9208-BDC-3, M9208-BGA-3, M9208-BGC-3Part No. 34-636-2103, Rev. HRelease June 2018InstallationThe M9208-Bxx-3 Series On/Off Electric Spring Return Actuators mount directly to the surface in any convenient orientation using two No.M3.5 x 9.5 mm self-drilling sheet metal screws and the anti-rotation bracket (parts included with the actuator). No additional linkages or couplers are required. Electrical connections are color-coded and identified with numbers permanently marked on the actuator cable. A tag on the actuator cable identifies the electrical connections and wiring details are included on the actuator housing.IMPORTANT:Do not install or use this M9208-Bxx-3 Series On/Off Electric Spring Return Actuator in or near environments where corrosive substances or vapors could be present. Exposure of the electric actuator to corrosive environments may damage the internal components of the device, and will void the warranty.Parts Included•M9208-Bxx-3 actuator•M9208-603 adjustable stop kit•M9000-604 anti-rotation bracket with twoNo.M3.5 x 9.5 mm, pan-head, cross-recessed (Phillips), self-drilling and self-tapping screws•Manual override crank with 3M® Dual Lock® adhesive-backed strip•Two No.10-32x9/16in. conduit connector screwsSpecial Tools Needed•10 mm wrench/socket•Drill with Phillips bit, driver size 1*346362103F*34-636-2103, Rev. HM9208-Bxx-3 Series On/Off Electric Spring Return Actuators Installation Instructions2DimensionsFigure 1: M9208-Bxx-3 Series On/Off Electric Spring Return Actuator Dimensions, in. (mm)M9208-Bxx-3 Series On/Off Electric Spring Return Actuators Installation Instructions3Accessories Table 1: Accessories and Replacement Parts (Order Separately)Code NumberDescriptionDMPR-KC0037inch- (178mm-) Blade Pin Extension (without bracket) for JohnsonControls® Direct-Mount Damper Applications (quantity 1)Note: Available with damper and may be ordered separately.M9000-322Weathershield Kit for Damper Application of M9203, M9308, and M9310 Series Electric Actuators (quantity 1)M9000-400Jackshaft Linkage Kit. Open-ended design enables clamping onto a jackshaft without requiring access to the ends of the jackshaft. (quantity 1)M9000-560Ball Valve Linkage Kit for applying M9203 and M9208 Series Electric Spring Return Actuators to VG1000 Series Valves (quantity 1)M9000-604Replacement Anti-Rotation Bracket Kit for M9203, M9208, M9220, M9308, M9310, M9320, and M9335 Series Electric Actuators (quantity 1)M9000-606Position Indicator for Damper Applications of M9203 and M9208 Series Actuators (quantity 5)M9200-100Threaded Conduit Adapter, 1/2 NPSM, for M9210(20) and M(VA)9208 Series Actuators (quantity 5)M9208-100Remote Mounting Kit, including MountingBracket, M9208-150 Crankarm, Ball Joint, and mounting fasteners (quantity 1)M9208-150Crankarm Adapter Kit (quantity 1)M9208-600Large Shaft Coupler Kit (with Locking Clip) for Mounting M9208 Series Electric SpringReturn Actuators on dampers with round shafts from 1/2to3/4 in.(12to19 mm) or square shafts from 3/8to9/16in.(10to14mm) (quantity 1)M9208-601Replacement Standard Coupler Kit (with Locking Clip) for mounting M9208 Series Electric SpringReturn Actuators on dampers with round shafts from 5/16to5/8in.(8to16mm) or square shafts from 1/4to 1/2in.(6to12mm) (quantity 1)M9208-602Replacement Locking Clips for M9208 Series Electric Spring Return Actuators (quantity 5)M9208-603Adjustable Stop Kit for M9208 Series Electric Spring Return Actuators (quantity 1)M9220-604Replacement Manual Override Cranks for M9208 Series Electric Spring Return Actuatorswith long crank radius: 2.83in.(72mm) (quantity 5)M9208-605Replacement Manual Override Cranks for M9208 Series Electric Spring Return Actuatorswith short crank radius: 1.83in.(46.5mm) (quantity 5)M9208-Bxx-3 Series On/Off Electric Spring Return Actuators Installation Instructions4MountingThe M9208-Bxx-3 Series On/Off Electric Spring Return Actuators can be easily installed on dampers with round shafts from 5/16to5/8in.(8to16mm) or square shafts from 1/4to1/2in.(6to12mm) using the standard shaft coupler included with the actuator. An optional M9208-600 Large Shaft Coupler Kit adapts to larger shaft sizes; see Table1 for more details. If the damper shaft extends less than 3.31in.(84mm), see the Removable Coupler section for further instructions. If the damper shaft extends less than 0.79in.(20mm), install a shaft extension recommended by the damper manufacturer.Counterclockwise (CCW) SpringReturn Direction – Clockwise (CW) Powered OperationFor CCW springreturn direction, mount the actuator to the damper shaft so that Side A of the actuator is away from the damper as illustrated in Figure2. With power applied, the actuator drives CW from the 0° position and spring returns CCW. Clockwise (CW) Spring Return Direction – Counterclockwise (CCW) Powered OperationFor CW spring return direction, mount the actuator to the damper shaft so that Side B of the actuator is away from the damper as illustrated in Figure3. With power applied, the actuator drives CCW from the 0° position and spring returns CW.Removable CouplerIf the damper shaft extends less than 3.31in.(84mm), mount the coupler on the face of the actuator closest to the damper.If the damper shaft extends less than 0.79in.(20mm), a shaft extension is required to mount the actuator.To change the coupler’s position, see Figure4 and proceed as follows:1.Mount the coupler on either Side A or Side B of the actuator as determined by the shaft length.2.Snap the locking clip securely into the coupler retention groove to retain the coupler.Figure 2: Actuator Side AFIG:M9208_Bxx_Side_A8.5xFigure 3: Actuator Side BFIG:M0208_Bxx_Side_B908.5xFigure 4: Changing the Coupler PositionFIG:Chng_PosnCplr_M9208-Bxx-3 Series On/Off Electric Spring Return Actuators Installation Instructions5Manual OverrideUse only the supplied manual override crank to reposition the actuator hub when using the manual override feature.To reposition the actuator hub, proceed as follows:1.De-energize the actuator.2.Insert the hex end of the manual override crank into the manual override adjustment point on the face of the actuator.3.Rotate the manual override crank in the direction indicated by the arrow on the label.4.The actuator requires 8-1/2 manual override crank rotations from the full spring return position to fully reposition the actuator hub. At the end of travel, the rotation resistance increases. Do not force the manual crank past this point.5.While holding the manual crank in the wound position, rotate and hold the red lock shaft approximately 10° then release the manual crank to lock the actuator hub in place.Note:Insert and slightly rotate the manual crank in the direction indicated by the arrow on the label to unlock the actuator hub. Alternatively, the actuator hub automatically unlocks when power is applied to the actuator, and returns the actuator to normal drive and spring return operation.Mounting the ActuatorTo mount the actuator, proceed as follows:1.See the dimensions in Figure5 and Table2 to ensure the correct positioning of the anti-rotation bracket.2.Bend or cut the anti-rotation bracket to fit the damper frame or duct as illustrated in Figure6.Note:The anti-rotation bracket can be bent to fit a round damper.3.Mark or drill mounting holes in the damper frame or duct using the anti-rotation bracket as a guide (based on the measurements obtained in Table2 and Figure5).4.Secure the anti-rotation bracket to the damper frame or duct using the two No.M3.5 x 9.5 mm self-drilling sheet metal screws provided.5.Slide the actuator onto the damper shaft, and position the anti-rotation bracket tab into the slot at the bottom of the actuator as illustrated in Figure6.IMPORTANT:Applying excessive torque to the manual override or operating the manual override with a power tool may damage the internal components of the actuator and cause premature failure.Table 2: Dimensions from Anti-Rotation Bracket to Shaft CenterShaft Diameter,in. (mm)Dimension A,in. (mm)Dimension B,in. (mm)5/16to5/8 (8to16)5-7/16 (138.4)4-5/32 (105.6)1/2 to 3/4 (12 to 19)5-13/32 (137.4)4-1/8 (104.6)IMPORTANT:The tab on the anti-rotation bracket must fit midpoint in the actuator slot. Positioning the tab midpoint in the slot prevents actuator binding and premature wear, and makes actuator removal easier.IMPORTANT:Do not overtighten the mounting screws to avoid stripping the threads. Be certain that the tab on the anti-rotation bracket remains properly positioned in the slot on the actuator, and that the actuator remains parallel to the mounting surface.Figure 5: Positioning the Anti-Rotation BracketFIG:M9208_Bxx_Position_Brkt8.5xDIM. ADIM. B8.5xM9208-Bxx-3 Series On/Off Electric Spring Return Actuators Installation Instructions66.Rotate the damper blade(s) to the desired position if the power is lost. To ensure a tight seal, insert the manual override crank and turn it in the direction indicated by the arrow. The position indicator should be near the 0° position on the scale. While holding the manual crank in the wound position, rotate and hold the red lock shaft approximately 10° then release the manual crank to temporarily lock the actuator hub in place.7.Hold the actuator perpendicular to the damper shaft. Evenly hand-tighten each nut on the coupler U-bolt, then torque the coupler U-bolt nuts to 100to125lb·in.(11 to14 N·m).8.To manually unlock the actuator hub, rotate the manual override crank slightly in the direction indicated by the arrow and remove it. Alternatively, the hub automatically unlocks when power is applied to the actuator.9.Store the manual override crank by applying the 3M DualLock adhesive-backed strip to the manual crank and a convenient surface of the actuator.10.Apply power long enough for the actuator to travel a full stroke. Verify that the actuator rotates freely throughout the range.Note:If electric power is not available, complete this verification by reinserting the manual override crank and turning it in the direction indicated to rotate the hub to the fully open position.Limiting Rotation Range Using M9208-603 Adjustable Stop KitThe actuator is factory set for 95° rotation, and its range is limited in 5° increments to a minimum of 35°. A stroke-limiting stop can be attached in the field to the shaft coupler side of the actuator to reduce the rotation range. Attaching the stroke-limiting stop in the furthest mounting position reduces the rotation range of the actuator by 5°. Each progressive mounting position reduces the rotation range an additional 5°.1.Check that the damper blade is visible or its position is permanently marked on the end of the damper shaft, as illustrated in Figure7.2.Position the stroke-limiting stop in the serrated slot with its leading edge at the scale position matching the desired stroke.3.The product label marks hole positions for the M3-0.5x8mm self-tapping screw provided with the adjustable stop kit. Drive the screw through the slot in the adjustable stop and into the actuator face over a marked hole position. (SeeFigure8.)Note:The minimum rotation range is 35°.Figure 6: Anti-Rotation Mounting Bracket FIG:M9208_ Anti-Rotn_Mntg_Brkt_Posn2-1/4(57.5)3-9/32(83.5)Anti-Rotation BracketDamper FrameSelf-Drilling Sheet Metal Screws (2)Figure 7: Damper Position FIG:dampersFigure 8: Limiting Rotation RangeFIG:M9208-Strk_Lmtg_Stop_Opaq_BrktM9208-Bxx-3 Series On/Off Electric Spring Return Actuators Installation Instructions7WiringSee Figure9 and Figure10 to wire the applicable M9208-Bxx-3Series model. Figure 9: Control Wiring AC 120 V 60 HzL1NWHTBLK21AC 230 V 50/60 HzL1NBLUBRN21REDBLK21+-~DC 24 VFIG:M9204-Bxx-2S_wiringFigure 10: Auxiliary Switch Wiring DiagramCOMNCNO21212322212223BLK/REDBLK/BLUBLK/GRYCOMNCNO242526WHT/REDWHT/BLUWHT/GRY25242426S2S1FIG:xxC_Switch_Wiring!WARNING: Risk of Electric Shock.Disconnect or isolate all power supplies before making electrical connections. More than one disconnect or isolation may be required to completely de-energize equipment. Contact with components carrying hazardous voltage can cause electric shock and may result in severe personal injury or death.AVERTISSEMENT : Risque de décharge électrique.Débrancher ou isoler toute alimentation avant de réaliser un branchement électrique. Plusieurs isolations et débranchements sont peut-être nécessaires pour -couper entièrement l'alimentation de l'équipement. Tout contact avec des composants conducteurs de tensions dangereuses risque d'entraîner une décharge électrique et de provoquer des blessures graves, voire mortelles.!CAUTION: Risk of Property Damage. Do not apply power to the system before checking all wiring connections. Short circuited or improperly connected wires may result in permanent damage to the equipment.MISE EN GARDE : Risque de dégâts matériels.Ne pas mettre le système sous tension avant d'avoir vérifié tous les raccords de câblage. Des fils formant un court-circuit ou connectés de façon incorrecte risquent d'endommager irrémédiablement l'équipement.!CAUTION: Risk of Property Damage. Insulate and secure each unused wire lead before applying power to the actuator. Failure to insulate and secure each unused wire lead may result in property damage.MISE EN GARDE : Risque de dégâts matériels.Isoler et protéger chaque fil non utilisé avant de mettre l'actuator sous tension. Le non-respect de cette obligation d'isolation et de protection de chaque fil non utilisé risque d'entraîner des dégâts matériels.M9208-Bxx-3 Series On/Off Electric Spring Return Actuators Installation Instructions8Using ConduitAll M9208 Series Actuators accept 3/8in. trade size flexible metal conduit. 1.Feed the actuator cables through the field supplied conduit.2.Push the conduit into the holes in the actuator and secure it with the supplied 10-32x9/16in. screws, as illustrated in Figure11. The product label marks the position of holes for the screws. Drive the screws through the product label in the marked positions. Drive the screwhead flush with the plate to secure the conduit.Setup and AdjustmentsAuxiliary Switch (M9208-xxC-3 Models)The M9208-xxC-3 models include two integral auxiliary switches with a switch adjuster accessible on either face of the actuator. (See Figure2 and Figure3.) The factory setting for Auxiliary Switch No.1 is 11°closing, and the nominal setting for Auxiliary Switch No.2 is 81° opening (relative to the 0to90° rotation range as printed on the product label). See the Technical Specifications table for the auxiliary switch ratings.IMPORTANT:Make all wiring connections in accordance with the National Electrical Code and local regulations. Use proper Electrostatic Discharge (ESD) precautions during installation and servicing to avoid damaging the actuator’s electronic circuits.IMPORTANT:Careful workmanship is required to secure flexible metal conduit. Cut the conduit end perpendicular to its axis. Insert the cut end into the bottom of the holes in the actuator and hold the conduit in place while securing it with the screws provided. Check a completed installation by pulling on the conduit to ensure its retention.Figure 11: Adding Flexible Metal Conduit!WARNING: Risk of Electric Shock and Property Damage.Insulate and secure each unused wire lead before applying power to the actuator. Failure to insulate and secure each unused wire lead may result in property damage, electric shock, and severe personal injury or death.AVERTISSEMENT : Risque de décharge électrique et dégâts matériels.Isoler et protéger chaque fil non utilisé avant de mettre l'actuator sous tension. Le non-respect de cette obligation d'isolation et de protection de chaque fil non utilisé risque d'entraîner des dégâts matériels, des décharges électriques et des blessures graves, voire mortelles.M9208-Bxx-3 Series On/Off Electric Spring Return Actuators Installation Instructions9The switch point of AuxiliarySwitchNo.1 is fixed. The switch point of AuxiliarySwitchNo.2 is independently and continuously adjustable from 25to90° position. For the most accurate switch positioning, see Figure12 and use the method in the following example.To change the switch point of auxiliarySwitchNo.2, proceed as follows:1.Position the actuator in the full spring return position.Note:The switch is factory set to trip when the actuator reaches the 81° position.2.Rotate the switch adjuster until it points to the desired switch point.3.Connect AuxiliarySwitchNo.2 to a power source or an ohmmeter and apply power to the actuator. The actuator moves to the fully open position and holds while power is applied.4.Observe the switch point. If required, repeat Step1 through Step3.Repair InformationA number of replacement parts are available; see Table1 for more details. If an M9208-Bxx-3 Series On/Off Electric Spring Return Actuator fails to operate within its specifications, replace the unit. For a replacement electric actuator, contact the nearest JohnsonControls® representative.Figure 12: Switch Trip Point SettingsFIG:M9208_Bxx_Adjustments90Switch Adjuster855030406070Next >