Damper Actuator,90 in-lb,Spring Return,24V,On/Off,NEMA 4| Actuator Type | Spring return |
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| Control Type | Open-close only |
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| Electrical Connection | cable |
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| Direction of Rotation (Fail-Safe) | reversible with CW/CCW mounting |
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| Direction of Rotation (Motor) | reversible with CW/CCW mounting |
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| Power Consumption (Holding) | 2.5�W |
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| Power Consumption (Running) | 6 W |
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| Degree of Protection | NEMA�4, UL�Enclosure�Type�4 |
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| Shaft Diameter | 1/2" to 1.05" round, centers on 3/4" with insert, 1.05" without insert |
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| Manual Override | 5 mm hex crank (3/16" Allen), supplied |
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| Application | For On/Off, fail-safe control of dampers in HVAC systems. Actuator sizing
should be done in accordance with the damper manufacturer?s specifications.
Control is On/Off from an auxiliary contact or a manual switch. The actuator
is mounted directly to a damper shaft up to 1.05? in diameter by means of its
universal clamp. |
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| Servicing | maintenance free |
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| Power Supply | 24 VAC�20%, 50/60Hz, 24 VDC+20%/-10% |
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| Power Consumption Running | 6 W |
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| Power Consumption Holding | 2.5 W |
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| Transformer Sizing | 8.5 VA (class 2 power source) |
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| Electrical Connection | 3 ft [1 m], 10 ft [3 m] or 16 ft [5 m] 18 GA appliance cables, with 1/2? conduit connector |
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| Overload Protection | electronic throughout 0� to 95� rotation |
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| Angle of Rotation | 95� (adjustable with mechanical end stop, 35� to 95�) |
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| Direction of Rotation (Motor) | reversible with CW/CCW mounting |
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| Manual Override | 5 mm hex crank (3/16? Allen), supplied |
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| Running Time (Motor) | <75 sec |
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| Ambient Temperature Range | -22�F to +122�F [-30�C to +50�C] |
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| Storage Temperature Range | -40�F to +176�F [-40�C to +80�C] |
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| Housing | NEMA 4, IP66, UL enclosure type 4 |
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| Agency Listings | cULus acc. to UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. to 2004/108/EC |
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| Noise Level (Motor) | �50 dB (A) |
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| Direction of Rotation (Fail-Safe | reversible with CW/CCW mounting |
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| Running Time (Fail-Safe) | 20 sec @ -4�F to +122�F [-20�C to +50�C], < 60 sec @ -22�F [-30�C] |
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| Noise Level (Fail-Safe) | <62 dB (A) |
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| Housing Material | polycarbonate |
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| Electrical protection | actuators are double insulated |
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| Shaft Diameter | 1/2? to 1.05? round, centers on 3/4? with insert, 1.05? without insert |
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| Torque | 90 in-lbs [10 Nm] minimum |
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| Operation | The NF..24 N4 series actuators provide true spring return operation for reliable
fail-safe application and positive close off on air tight dampers. The spring
return system provides constant torque to the damper with, and without, power
applied to the actuator. The NF..24 N4 series provides 95� of rotation and is
provided with a graduated position indicator showing 0� to 95�. The actuator
may be stalled anywhere in its normal rotation without the need of mechanical
end switches. The NF..24 N4 actuator is shipped at +5� (5� from full fail-safe) to
provide automatic compression against damper gaskets for tight shut-off. |
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| Typical Specification | On/Off spring return damper actuators shall be direct coupled type which
require no crank arm and linkage and be capable of direct mounting to a
jackshaft up to a 1.05? diameter. The actuators must be designed so that they
may be used for either clockwise or counter clockwise fail-safe operation.
Actuators shall be protected from overload at all angles of rotation. If required,
two SPDT auxiliary switch shall be provided having the capability of one being
adjustable. Actuators with auxiliary switches must be constructed to meet
the requirements for Double Insulation so an electrical ground is not required
to meet agency listings. Actuators shall be cULus listed and have a 5 year
warranty, and be manufactured under ISO 9001 International Quality Control
Standards. Actuators shall be as manufactured by Belimo. |
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Product Family
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