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USA
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LATIN AMERICA / CARIBBEAN
25
EFB120, EFB120-S, EFX120, EFX120-S
On/Off, Spring Return, 100 to 240 VAC
Torque min. 270 in-lb, for control of air dampers
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.
Operation
The EFB and EFX 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 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 b10° 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.
Dimensions
(Inches [mm])
4.74 [120.5]
3.15 [80]
1.06 [27]
0.19 [4.85]
0.53 [13.5]
5.43 [138]
4.41 [112]
0.59 [15]
2.76 [70]
1.38 [35]
0.52 [13.3]
7.40 [188]
1.97 [50]
0.20 [5.2]
5.63 [143]
0.33 [8.3]
2.13 [54]
2.44 [62]
11.32 [287.5]
13.09 [332.5]
1.95 [49.5]
1.77 [45]
K9-2
(supplied)
1/2"
(Field Selectable)
3/4"
Centered
(Default)
1.05" Centered
(Field Selectable)
EF_NEMA2_dims
Technical Data
EFB120, EFB120-S, EFX120, EFX120-S
Power supply
100...240 VAC +10% / -20%, 50/60 Hz
100...125 VDC ±10%
Power consumption
running 9.5 W
holding 4.5 W
VA rating
21 VA @ 100 VAC
29 VA @ 240 VAC
Electrical connection
EFB120...
3 ft, 18 GA appliance cable, 1/2" conduit
connector
-S models:
Two 3 ft, 18 gauge appliance cables
with 1/2” conduit connectors
EFX120...
3 ft [1m], 10 ft [3m] or 16 ft [5m] 18 GA
appliance cable, with or without 1/2” conduit
connector
-S models:
Two 3 ft [1m], 10 ft [3m] or
16 ft [5m] appliance cables with or without 1/2"
conduit connectors
Overload protection
electronic throughout 0 to 95° rotation
Control
on/off
Torque
270 in-lb [30 Nm] minimum
Direction of rotation
spring reversible with CW/CCW mounting
Mechanical angle of rotation
max. 95° (adjustable with mechanical end stop,
35° to 95°)
Running time
motor 75 sec
spring < 20 seconds @ -4°F to 122°F [-20°C to 50°C];
< 60 seconds @ -22°F [-30°C]
Position indication
visual indicator, 0° to 95°
(0° is full spring return position)
Manual override
5 mm hex crank (
³⁄₁₆
" Allen), supplied
Humidity
max. 95% RH non-condensing
Ambient temperature
-22°F to 122°F [-30°C to 50°C]
Storage temperature
-40°F to 176°F [-40°C to 80°C]
Housing
Nema 2, IP54, Enclosure Type2
Housing material
aluminum diecast and plastic casing
Agency listings
†
cULus acc. to UL60730-1A/-2-14,
CAN/CSA E60730-1:02, CE acc. to
2004/108/EC & 2006/95/EC
Noise level
≤
56.5dB(A) motor @ 75 seconds
≤
71.4dB(A) spring return
Servicing
maintenance free
Quality standard
ISO 9001
Weight
9.82 lbs [4.45 kg], 10.14 lbs [4.6 kg] with switches
† Rated Impulse Voltage 2.5kV, Type of action 1.AA (1.AA.B for -S version),
Control Pollution Degree 3.
EFB120-S, EFX120-S
Auxiliary switches
2 x SPDT 3A (0.5A) @ 250 VAC, UL Approved
one set at +10°, one adjustable 10° to 85°
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 actuators input wiring with UL listed flexible
conduit. Properly terminate the conduit in a suitable junction box.
N40103 - 09/11 - Subject to change.
© Belimo
Aircontrols (USA),
Inc
.
