800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN
orque min. 270 in-lb, for control of air damper
A
licatio
or on/off, fail-safe control of dampers in HVAC systems. Actuator sizing should be
one in accordance with the damper manufacturer’s specifications. Control is On/Off
rom an auxiliary contact, or a manual switch.
he actuator is mounted directl
to a dam
er shaft u
to 1.05” in diameter b
means
f its universal clamp. A crank arm and several mountin
brackets are available for
lications where the actuator cannot be direct cou
led to the dam
er shaft
Operatio
he EFB and EFX series actuators provide true spring return operation for reliable fail
afe application and positive close off on air ti
ht dampers. The sprin
return system
rovides constant tor
ue to the dam
er with, and without,
ower a
lied to the
t
t
r
he EFB and EFX series provides 95° of rotation and is provided with a
raduated
osition indicator showin
0° to 95°
he actuator may be stalled anywhere in its normal rotation without the need of
m
n
n
w
t
he EFB24-
and EFX24-
versions are provided with two built-in auxiliary switches.
hese SPDT switches are provided for safety interfacing or signaling, for example, for
an start-up. The switching
unction at the
ail-sa
e position is
ixed at +10°, the other
witch function is ad
ustable between +10° to +85°. The EFB24, EFB24-
, EFX24 and
FX24-
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
FB24, EFB24-S, EFX24, EFX24-S
On/Off, Sprin
Return, 24
Technical Data EFB24, EFB24-S, EFX24, EFX24-S
ower supp
y
4 VA
± 20% 50
60 Hz
4 VD
+20%
-10%
Power consumption
unnin
9.5 W
olding
.5 W
Transformer sizin
6 VA
class 2 power source
Electrical connectio
24..
ft, 18 GA appliance cable, 1/2" conduit connector
-S models: two 3 ft, 18 gauge appliance cables
ith 1
2” conduit connectors
EFX24...
ft [1m], 10 ft [3m] or 16 ft [5m] 18 GA appliance
or plenum cables, with or without 1
2” conduit
onnec
or
-S m
dels: two
t
1m
, 10 ft
3m
or
6 ft [5m] appliance cables, with or without 1
2"
on
u
t connectors
verload protectio
ectron
c t
roug
out 0 to 95° rotat
on
ontro
on
off
Torque
70 in-lb [30 Nm] minimum
Direction o
rotatio
pring
eversible with CW/CCW mountin
echanical an
le o
rotatio
ax. 95°
ad
ustable with mechanical end stop, 35°
o 95°
Runnin
time
o
o
n
prin
20 seconds
-4°F to 122°F [-20°
to 50°
]
60 seconds
-22°F [-30°
]
t
n
n
t
sua
n
cator, 0° to 95°
0° is
ull sprin
return position
n
l
v
rri
mm hex crank
₁
" Allen
, supplie
Humidity
ax. 95% RH non-condensin
Ambient tem
eratur
22°F to 122°F
-30°C to 50°C
tora
e temperature
40°F to 176°F
-40°C to 80°C
Housin
Nema 2, IP54, Enclosure Type
Housing materia
aluminum diecast and plastic casing
gency
st
ngs
ULus acc. to UL60730-1A
-2-14,
AN/CSA E60730-1:02, CE acc. t
004
108
E
& 2006
95
E
v
6.5dB(A) motor
75 seconds
≤
1.4dB(A) spring return
ervicin
aintenance
ree
Qualit
standar
I
1
e
g
9.82
s
4.45
g
, 10.14
s
4.6
g
w
t
sw
tc
es
† Rated Impulse Volta
e 800V, Type of action 1.AA
1.AA.B for -
version
,
ontrol Pollution De
ree 3.
FB24-S, EFX24-S
Auxiliary switches
x
PDT 3A (0.5A)
250 VA
, UL approve
one set at +10°, one adjustable 10° to 85
nsta
at
n
te: Use
lexible metal conduit. Push the UL listed conduit
itting
device over the actuator's cable to butt a
ainst the enclosure.
crew in
onduit connector. Jacket the actuators input wirin
with UL listed flexible
onduit. Properl
terminate the conduit in a suitable
unction box
N40103 - 09/11 - Subject to change. © Belimo Aircontrols (USA), Inc
