EFB120-S

 

Torque: 270 in-lb [30 Nm]

 

Signal: On/Off 2 position control

 

Technical Cutsheet	EFB & EFX actuators, Technical Document
Installation Instructions	Product Broshure

Fail-Safe	Spring Return
Torque	270 in-lb [30 Nm]
Control Input	On/Off
Input Impedance	N/A
Position Feedback	--
Running Time (motor)	75 seconds
Running Time (fail-safe)	<20 sec @ -4ÃÃðF to +122ÃÃðF [-20ÃÃðC to +50ÃÃðC], <60 sec @ -22ÃÃðF [-30ÃÃðC]
Auxiliary Switch	2 x SPDT 3A (0.5A) @ 250 VAC, UL approved, one set at +10ÃÃð, one adjustable 10ÃÃð to 85ÃÃð
Power Supply	24 VAC ÃÃñ 20%, 50/60 Hz, 24 VDC +20% / -10%
Power Consumption	Running: 9.5 W; Holding: 4.5 W
Transformer Sizing	16 VA (Class 2 power source)
Electrical Connection	Two 3 ft, 18 GA appliance cables with 1/2" conduit connectors
Overload Protection	Electronic throughout 0ÃÃð to 95ÃÃð rotation
Shaft Diameter	1/2" to 1.05" round, centers on 3/4" with insert, 1.05" without insert
Angle of Rotation	95ÃÃð (adjustable with mechanical end stop, 35 to 95ÃÃð)
Direction of Rotation (motor)	Reversible with CW/CCW mounting
Direction of Rotation (fail-safe)	Reversible with CW/CCW mounting
Position Indication	Visual indicator, 0ÃÃð to 95ÃÃð (0ÃÃð is spring return position)
Manual Override	5 mm hex crank (3/16" Allen), supplied
Humidity	Max. 95% RH non-condensing
Ambient Temperature	-22ÃÃðF to +122ÃÃðF [-30ÃÃðC TO +50ÃÃðC]
Ambient Temperature (safety)	--
Storage Temperature	-40ÃÃðF to +176ÃÃðF [-40ÃÃðC TO +80ÃÃðC]
Noise Level	56.5 dB (A) motor @ 75 seconds, 71.4 dB (A) spring return
Housing Material	Aluminum die cast and plastic casing
Housing	NEMA 2, IP54, Enclosure Type2
Agency Listing	cULus acc. To UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. To 2004/108/EC & 2006/95/EC
Quality Standards	ISO 9001
Weight	10.14 lbs (4.6 kg)

Application

For On/Off, fail-safe control of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturers 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.

 

Operation

The EFB and EFX 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 EFB and EFX 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 EFB120-S and EFX120-S versions are provided with two built-in auxiliary switches. These SPDT switches provide safety interfacing or signaling, for example, for fan start-up. The switching function at the fail-safe position is fixed at +10, the other switch function is adjustable between +10 to +85. The EFB120, EFB120-S, EFX120 and EFX120-S actuator is shipped at +5 (5 from full fail-safe) to provide automatic compression against damper gaskets for tight shut-off.