Spring, 270in-lb, On/Off, 24V| 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. A crank arm and several mounting brackets are available for
applications where the actuator cannot be direct coupled to the damper shaft.
Maximum of two EF?s can be piggybacked for torque loads of up to 540 in-lbs.
Minimum 3/4? diameter shaft and parallel wiring. |
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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 | 9.5 W |
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| Power Consumption Holding | 4.5 W |
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| Transformer Sizing | 16 VA (class 2 power source) |
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| Electrical Connection | 3 ft [1 m], 18 GA appliance cable with 1/2?
conduit connector |
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| Angle of Rotation | max. 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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| 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) | �56.5 dB (A) |
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| Direction of Rotation (Fail-Safe | reversible with CW/CCW mounting |
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| Position Indication | visual indicator, 0� to 95� (0� is full spring
return position) |
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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) | �71 dB (A) |
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| Housing Material | Aluminum die cast and plastic casing |
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| Electrical protection | actuators are double insulated |
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| Humidity | max. 95% RH non-condensing |
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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 | 270 in-lbs [30 Nm] minimum |
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| Housin | NEMA 2, IP54, UL enclosure type 2 |
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| ZG-100 | Univ. right angle bracket (17? H x 11-1/8? W x 6? base). |
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| ZG-DC1 | Damper clip for damper blade, 3.5? width. |
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| ZG-DC2 | Damper clip for damper blade, 6? width. |
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| AV8-25 | 9.8? shaft extension for 5/16? to 1? diameter shafts. |
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| PS-100 | Actuator power supply and control simulator. |
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| ZG-X40 | 120 to 24 VAC, 40 VA transformer |
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| EF-P | Anti-rotation bracket EFB(X)/GKB(X)/GMB(X). |
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| IND-EFB | EFB(X) position indicator. |
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| K9-2 | Standard EFB(X) clamp (1/2? to 1.05?). |
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| KG10A | Ball joint for 3/8? diameter rod, zinc plated. |
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| KH10 | Univ. crankarm, slot 21/64? w, for 9/16? to 1? dia. shafts. |
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| KH-EFB | EFB(X) crankarm (with 1.05? diameter shaft pass through). |
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| SH10 | Push rod for KG10A ball joint (36? L, 3/8? diameter). |
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| ZG-120 | Jackshaft mounting bracket. |
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| ZG-EFB | EFB(X) crankarm adaptor kit. |
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| ZG-JSA-3 | 1.05? diameter jackshaft adaptor (12? L). |
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| TF-CC US | Cable conduit connector, 1/2?. |
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| Operation | The EF..24 series actuators provide true spring return operation for reliable
failsafe 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 EF..24 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 EF..24 actuator is shipped at +5� (5� from full fail-safe) to
provide automatic compression against damper gaskets for tight shut-off.
Installation Note: Use flexible metal conduit. Push the UL listed conduit fitting
device over the actuator?s cable to butt against the enclosure. Screw in conduit
connector. Jacket the actuator?s input wiring with UL listed flexible conduit.
Properly terminate the conduit in a suitable junction box. |
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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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