800-543-9038
USA
866-805-7089
CANADA
203-791-8396
LATIN AMERICA / CARIBBEAN
27
EFB120-S N4, EFX120-S N4(H)
NEMA 4, 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 N4 and EFX 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 EFB N4 and EFX 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 EFB120-S N4 and EFX120-S N4(H) 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 fixed at 85°. The EFB120-S N4 and EFX120-S N4(H)
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]
0.20 [5.2]
5.43 [138]
0.52 [13.3]
4.17 [106]
7.40 [188]
1.97 [50]
0.59 [15]
2.76 [70]
1.38 [35]
13.54 [344]
5.63 [143]
0.33 [8.3]
K9-2
(supplied)
1/2"
(Field Selectable)
3/4"
Centered
(Default)
1.05" Centered
(Field Selectable)
EF_NEMA
4
_di
ms
Technical Data
EFB120-S N4, EFX120-S N4(H)
Power supply
100...240 VAC +10% / -20%, 50/60 Hz
100...125 VDC ±10%
Power consumption
running 9.5 W / heater 22 W
holding 4.5 W
VA rating
21 VA @ 120 VAC / heater 22 VA
29 VA @ 240 VAC
Electrical connection
terminal block(s) inside junction box with
knockouts
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 sec @ -4°F to 122°F [-20°C to 50°C];
< 60 sec @ -22°F [-30°C]
spring (w/heater) < 20 sec @ -22°F to 122°F [-30°C to 50°C];
< 60 sec @ -40°F [-40°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]
with heater -40°F to 122°F [-40°C to 50°C]
Storage temperature
-40°F to 176°F [-40°C to 80°C]
Housing
NEMA 4, IP66, Enclosure Type4
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
10 lbs [4.54 kg], 10.1 lbs [4.59 kg] with heater
† Rated Impulse Voltage 2.5kV, Type of action 1.AA (1.AA.B for -S version), Control Pollution Degree 4.
EFX120-S N4H is only UL listed.
EFB120-S N4, EFX120-S N4(H)
Auxiliary switches
2 x SPDT 3A (0.5A) @ 250 VAC, UL Approved
one set at 10° and one set at 85°
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.
N40103 - 09/11 - Subject to change.
© Belimo
Aircontrols (USA),
Inc
.
