800-543-9038 USA866-805-7089 CANADA203-791-8396 LATIN AMERICA36Installation and OperationNon-Spring ReturnGeneral InformationPreliminary Steps1. Belimo actuators with NEMA 1 or NEMA 2 ratings should be mounted indoors ina dry, relatively clean environment free from corrosive fumes. If the actuator ismounted outdoors, a protective enclosure must be used to shield the actuator. 2. For new construction work, order dampers with extended shafts. Instruct theinstalling contractor to allow space for mounting the Belimo actuator on the shaft. For replacement of existing gear train actuators, there are two options: A. From a performance standpoint, it is best to mount the actuator directly onto the damper shaft. B. If the damper shaft is not accessible, mount the non-spring return actuator witha ZG-NMA or ZG-GMA crank arm kit, and a mounting bracket (ZG-100, ZG-101, ZG-103, ZG-104)Determining Torque Loading and Actuator SizingDamper torque loadings, used in selecting the correct size actuator, should be pro-vided by the damper manufacturer. If this information is not available, the followinggeneral selection guidelines can be used.Damper TypeTorque LoadingOpposed blade, without edge seals, fornon-tight close-off applications3 in-lb/sq. ft.Parallel blade, without edge seals, fornon-tight close-off applications4 in-lb/sq. ft.Opposed blade, with edge seals, for tightclose-off applications5 in-lb/sq. ft.Parallel blade, with edge seals, for tightclose-off applications7 in-lb/sq. ft.The above torque loadings will work for most applications under 2 in. w.g. static pressure or 1000 FPM face velocity. For applications between this criteria and 3 in.w.g. or 2500 FPM, the torque loading should be increased by a multiplier of 1.5. If the application calls for higher criteria up to 4 in. w.g. or 3000 FPM, use a multiplier of 2.0.Torque Loading Chart1401201008060402002346810579Damper Area (sq. ft.)Torque Loading (in-lb/ sq. ft.)Multiple Actuator MountingIf more torque is required than one GM can provide, GM24B, GMB24-SR or GMX24-MFT may be installed on the same shaft.Table of ContentsPAGEGeneral Mounting Standard 270 Reversible Clamp ...............................................271 Linear .................................................................272 Rotary .................................................................273 Retrofit Brackets 275OperationElectrical 276 Mechanical .........................................................277Wiring General ...............................................................278 Accessories ........................................................279Startup and Checkout ..............................................282 M40024 - 05/10 - Subject to change. © Belimo Aircontrols (USA), Inc.800-543-9038 USA866-805-7089 CANADA203-791-8396 LATIN AMERICA36SEE NEXT PAGE FOR STANDARD MOUNTING INSTRUCTIONS.C**LM1/4” to 5/8”5/16” to 9/16”1.5”4 to 5 ft-lbLMQB1/2” to 1.05”3/8” to 11/16”1.5”6 to 7 ft-lb1/2” to 1.05”3/8” to 11/16”1.5”6 to 7 ft-lbNMQB1/2” to 1.05”3/8” to 11/16”1.5” 6 to 7 ft-lbAM1/2” to 1.05”3/8” to 11/16”1.5” 6 to 7 ft-lbAMQB1/2” to 1.05”7/16” to 11/16”1.5”6 to 7 ft-lbGMB1/2” to 1.05”7/16” to 11/16”1.5”6 to 7 ft-lb* LMB standard clamp has max 5/8” diameter. Accessory clamp K-LM20 can be mounted for sizes up to 3/4” diameter. NM and AM clamps have an insert that self-centers on the following diameter shafts: 1/2” (default), 3/4” and 1.05”. GMclamps have an insert that self-centers on 3/4” diameter.** Shorter with reversible clamp for NMB, AMB, and GMB.Installation InstructionsQuick-Mount Visual Instructions for Mechanical InstallationCAB12112112365°2155°10D214LM UniversalMounting Bracket M40024 - 05/10 - Subject to change. © Belimo Aircontrols (USA), Inc.800-543-9038 USA866-805-7089 CANADA203-791-8396 LATIN AMERICA36Mounting InstallationReversible Clamp Quick Mount (NM, AM, GM)1 Turn the damper shaft until the blades are fully closed.2 Slip the actuator’s universal clamp over the damper shaft. Make sure thatthe duct and the controls on the cover are accessible. Place the actuator in thedesired mounting position. Hand tighten the two nuts on the actuators universal clamp. 3 Disengage the actuator gear train by pressing the manual override buttonand rotate the clamp until centered. Slide the anti-rotation strap up under the actuator so it engages the actuator at the center cutout. Bend the bracket as needed to support the rearof the actuator. Secure to ductwork with self-tapping screws (No. 8 recom-mended).4 Loosen the nuts on the universal clamp. Press the manual overridebutton and rotate the clamp to about 5° from the closed position (1/16 to 1/8” between stop and clamp). Tighten the two nuts on the universal clamp with a 10 mm wrench (seetable for required torque).5 Snap on the reflective position indicator. Adjust end-stops, if required.6Mount actuators indoors. If mounted outdoors, use approved protective enclo-sure. The damper is now fully closed but the actuator is 5° from fully closed. This is called “pre-loading” the actuator. When the actuator is powered and sent to the closedposition: it will put its full torque on the shaft compressing the edge and blade seals. This ensures that the damper will meet its leakage rating. The actuator is electroni-cally protected from overload and will not be damaged.Testing the Installation Without Power1. Disengage the gear train with the manual override button and move the shaftfrom closed to open to closed. Ensure that there is no binding and that the damper goes fully open and closes with 5° of actuator stroke left.2. Correct any problems and retest.Standard Mounting M40024 - 05/10 - Subject to change. © Belimo Aircontrols (USA), Inc.800-543-9038 USA866-805-7089 CANADA203-791-8396 LATIN AMERICA36Mounting InstallationLinear Quick Mount (LH, AH)1Ø max. 0.3" [8]20.08" [2]0.8" [20]0.8" [20]3M8Z-DS1AZ-DS1B±10°C M40024 - 05/10 - Subject to change. © Belimo Aircontrols (USA), Inc.800-543-9038 USA866-805-7089 CANADA203-791-8396 LATIN AMERICA36Mounting InstallationRotary Quick Mount (LU)K-LUmin. 1/2" [13]5/16"…1/2" [8...12]K-LU Shaft ClampZDB-LU Angle of Rotation Limiter100306090120150180210240270300330+0330300270240210180150120906030+033030027024021018015012090603003060901201501802102402703003300°...120°033030027024021018015012090603003303002702402101801501209060300°...270°03060901201501802102402703003300306090120150180210240270300330ZDB-LU Angle of Rotation Limiter M40024 - 05/10 - Subject to change. © Belimo Aircontrols (USA), Inc.800-543-9038 USA866-805-7089 CANADA203-791-8396 LATIN AMERICA36Mounting InstallationQuick Mount, Direct Coupled CMB24-3(-T) / CMB120-31234A! M40024 - 05/10 - Subject to change. © Belimo Aircontrols (USA), Inc.800-543-9038 USA866-805-7089 CANADA203-791-8396 LATIN AMERICA361Replacing Discontinued Belimo ActuatorsWhen replacing an actuator, whether Belimo or other, be sure to consider the ap-plication parameters before selecting the replacement. The new product may notbe the best fit for the application. Example would be a Belimo AM24 US mounted to a valve linkage. The direct replacement of the actuator is AMB24-3. However, the AM24 US and the AMB24-3 are different lengths, the linkage would need to be replaced as well.Instead of replacing the linkage the retrofit bracket Z-SMA and Z-GMA can be usedto extend the location of the anti-rotation bracket to match the location of the anti-rotation bracket of discontinued Belimo actuators.NOTE: LM and LMB are the same size.Mounting InstructionsRetrofi t Brackets (Z-SMA and Z-GMA)3 Nm2NMGM1x-for replacing NM actuators2 xZ-GMAfor replacing GM actuators2xZ-SMAfor replacing AM and SM actuatorsSMAMAB M40024 - 05/10 - Subject to change. © Belimo Aircontrols (USA), Inc.800-543-9038 USA866-805-7089 CANADA203-791-8396 LATIN AMERICA36OperationElectrical FeaturesElectrical OperationGeneralBelimo non-spring return actuators utilize Halomo sensorless Brushless DC motortechnology developed by Belimo. The non-spring return actuators use this motor in conjunction with an Application Specific Integrated Circuit (ASIC). The Halomo ASICprovides the intelligence to provide a constant rotation rate to prevent damage tothe actuator.InitializationWhen a power source is applied the motor carries out an initialization of theactuator. The purpose of this initialization is to determine the mechanical angle ofrotation and to adapt the running time to the angle of rotation. When power isapplied, the internal microprocessor recognizes that the actuator is at its full-safe position and uses this position as the base for all of its calculations. Brushless DC Motor OperationBelimo’s Halomo sensorless brushless DC motor spins by reversing the poles ofstationary electromagnets housed inside rotation permanent magnets. The electromagnetic poles are switched by a special ASIC developed by Belimo. Unlike the conventional DC motor, there are no brushes to wear or commutators to foul.Motor Position DetectionBelimo's Halomo motor technology is a sensorless, brushless DC motor. The Halomo technology eliminates the need for potentiometers for positioning. TheHalomo ASIC detects the spinning rotor by monitoring the back EMF of the motorpoles. The ASIC counts these pulses and calculates position within 1/3 of a motorrevolution.Overload ProtectionThe Belimo non-spring return actuators are electronically protected from overload at all angles of rotation by digital technology in the ASIC. The ASIC circuitry constantly monitors the rotation of the brushless DC motor inside the actuator and stops the pulsing to the motor when it senses an overload. The motor remains energized andproduces full rated torque when in overload. The overload filtration helps increase the actuators installed life expectancy by filtering out unnecessary control signal changes or end-stop pulsing while inoverload. This helps ensure that dampers are fully closed and that edge and blade seals are always properly compressed.Control Accuracy and StabilityAll Belimo actuators have built-inbrushless DC motors which provide better accuracy and longer service life. Belimo non-spring return actuators are designed with a unique non-symmetrical deadband. The actuator follows an increasing or decreasingcontrol signal with a 75 mV resolution. If the signal changes in the oppositedirection, the actuator will not respond until the control signal changes by175 mV. This allows these actuators to track even the slightest deviation veryaccurately, yet allowing the actuator to “wait” for a much larger change in control signal due to control signal instability.SatisfiedControl PositionMinimumControl Resolution75 mVActuator responds to a 75 mV signal whennot changing direction from stop position.SatisfiedControl PositionMinimum ReversedControl DeadbandPrior to Normal Control175 mVActuator responds to a 175 mV signal whenreversing direction from stop position.800-543-9038 USA866-805-7089 CANADA203-791-8396 LATIN AMERICA370Manual Override Button10 VDC10 VDC2 VDCDirection of Rotation Switch 65°OperationMechanical FeaturesManual OverrideThe Belimo non-spring return actuators have a black, “manual override button” located on the top of the housing. Press this button and the gear train isdisengaged so the damper shaft can be moved manually. Release the button andthe gear train is re-engaged. Use the manual override to test the installation without power. For tight shut-off the damper should close with 5° of actuator stroke left.Direction of Rotation Switch Non-spring return actuators have a reversing switch on the cover. Switch position indicates start point. For the non-spring return, with the switch in position 1, theactuator rotates clockwise with an decrease in voltage or current. With the switch in position 0, the actuator rotates counterclockwise with an decrease in voltage or current. The non-spring return rotates clockwise when the switch is in the 1 position andpower is applied to wire #2. When power is applied to wire #3 the actuator rotatescounter clockwise. Rotating the switch to 0 reverses the control logic.During checkout, the switch position can be temporarily reversed and the actuatorwill reverse its direction. This allows the technician a fast and easy way to check the actuator operation without having to switch wires or change settings on the thermostat. When the check-out is complete, make sure the switch is placed back to its original position.Mechanical Angle of Rotation Limiting The adjustable stops are needed when there is no damper stop or if you want thedamper to stop rotating before it reaches its stops. The non-spring return actuators can be indefinitely stalled in any position without harm.1. Loosen the two end stops with a No. 2 Phillips head screwdriver being carefulnot to unscrew the captive nut under the slot.2. Move the stops (in 2.5° steps) to the desired position and re-tighten the screws. M40024 - 05/10 - Subject to change. © Belimo Aircontrols (USA), Inc.Next >