24V S/R 270# 2-10VDC NEMA 4| Application | For fail-safe, modulating control of dampers in HVAC systems. Actuator sizing
should be done in accordance with the damper manufacturer?s specifications.
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. The actuator operates in response to a 2 to 10 VDC or, with
the addition of a 500� resistor, a 4 to 20 mA control input from an electronic
controller or positioner. A 2 to 10 VDC feedback signal is provided for position
indication. Not to be used for a master-slave application. |
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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 | 8 W |
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| Power Consumption Holding | 4.5 W |
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| Transformer Sizing | 14 VA (class 2 power source) |
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| Electrical Connection | terminal block(s) inside junction box with
knockouts |
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| Overload Protection | electronic throughout 0� to 95� rotation |
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| Input Impedance | 100 k ? for 2 to 10 VDC (0.1 mA), 500 ? for
4 to 20 mA |
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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 built-in switch |
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| Manual Override | 5 mm hex crank (3/16? Allen), supplied |
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| Running Time (Motor) | 95 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) | �56.5 dB (A) |
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| Operating Range Y | 2 to 10 VDC, 4 to 20 mA w/ ZG-R01 (500 ?,
1/4 W resistor) |
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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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| Feedback Output U | 2 to 10 VDC, 0.5 mA max |
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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 | 270 in-lbs [30 Nm] minimum |
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| Housing Materia | Aluminum die cast and plastic casing |
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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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| SGA24 | Positioner control for modualting actuators (surface mount). |
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| SGF24 | Positioner control for modulating actuators (flush mount). |
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| ADS-100 | Analog to digital switch for modulating actuators. |
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| ZG-R01 | 4 to 20 mA adaptor, 500�, 1/4 W resistor w 6? pigtail wires. |
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| ZG-X40 | 120 to 24 VAC, 40 VA transformer |
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| PTA-250 | Pulse width modulation interface for modulating actuators |
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| IRM-100 | Input rescaling module for modulating actuators. |
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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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| ZG-R02 | 50% voltage divider kit (resistors with wires). |
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| ZG-SGF | Mounting plate for SGF. |
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| Operation | The EF..24-SR N4 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-SR N4 series provides 95� of rotation
and is provided with a graduated position indicator showing 0� to 95�. The
EF..24-SR N4 uses a brushless DC motor which is controlled by an Application
Specific Integrated Circuit (ASIC) and a microprocessor. The microprocessor
provides the intelligence to the ASIC to provide a constant rotation rate and to
know the actuator?s exact fail-safe position. The ASIC monitors and controls the
brushless DC motor?s rotation and provides a digital rotation sensing function to
prevent damage to the actuator in a stall condition. The actuator may be stalled
anywhere in its normal rotation without the need of mechanical end switches.
The EF..24-SR N4 actuator is shipped at +5� (5� from full fail-safe) to provide
automatic compression against damper gaskets for tight shut-off.
Installation Note: Use 60�C/75�C copper (CU) conductor and wire size range
12-26 AWG, stranded or solid. If conduit is used, use flexible metal conduit;
UL listed and CSA certified strain relief or conduit fitting suitable for outdoor
applications, rated NEMA type 4, 4X, 6 or 6X or watertight. |
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| Typical Specification | Spring return control 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 actuator must provide modulating damper control in response to a 2 to 10 VDC or, with the addition of a 500? resistor, a 4 to 20 mA control input from an electronic controller or positioner. The actuators must be designed so that they may be used for either clockwise or counter clockwise fail-safe operation. Actuators shall use a brushless DC motor controlled by a microprocessor and be protected from overload at all angles of rotation. Run time shall be constant, and independent of torque. A 2 to 10 VDC feedback signal shall be provided for position feedback. 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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