Submittal Sheet

800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA
95
LF24
(
-
S)
U
S
On/Off, Sprin
g
Return, 24
V
T
orque min. 35 in-lb, for control of air dampers
A
pp
l
i
cat
i
o
n
F
or On/Off, fail-safe control of dampers in HVAC systems. Actuator sizing should be
d
one in accordance with the damper manufacturer’s specifications. Control is On/Off
f
rom an auxiliary contact, digital output, or a manual switch.
T
he actuator is mounted directl
y
to a dam
p
er shaft from 3/8” u
p
to 1/2” in diameter
b
y means of its universal clamp, 1/2” shaft centered at delivery. For shafts up to 3/4”
u
se K6-1 accessory. A crank arm and several mounting brackets are available for
app
lications where the actuator cannot be direct cou
p
led to the dam
p
er shaft
.
Op
eratio
n
T
he LF series actuators provide true sprin
g
return operation for reliable fail-safe
a
pplication and positive close off on air ti
g
ht dampers. The sprin
g
return system
p
rov
id
es cons
i
stent torque to t
h
e
d
amper w
i
t
h
, an
d
w
i
t
h
out, power app
li
e
d
to t
h
e
a
ctuator
.
T
he LF series provides 95° of rotation and is provided with a
g
raduated position
i
n
di
cator s
h
ow
i
ng 0° to 95°
.
T
he actuator ma
y
be stalled an
y
where in its normal rotation without the need of
mec
h
an
i
ca
l
en
d
sw
i
tc
h
es.
P
ower consumpt
i
on
i
s re
d
uce
d
i
n
h
o
ldi
ng mo
d
e.
T
he LF24-S US version is provided with one built in auxiliary switch. This SPDT switch
i
s provided
f
or sa
f
ety inter
f
acin
g
or si
g
nalin
g
,
f
or example,
f
or
f
an start-up. The
s
witchin
g
f
unction is ad
j
ustable between 0° and 95°. The auxiliary switch in the
L
F24-S is double insulated so an electrical
g
round connection is not necessary.
Dimensions (Inches [mm])
0.39" [10]
7.67" [195]
3.66" [93]
1.93"
[49]
6.10" [155]
3.15" [80]
3.86"
[98]
0.256" [6.5]
0.98"
[25]
4.92" [125]
0.79"
[20]
0.5"
[12.7]
0.71" [18]
0.74" [18.7]
2.24"
[57]
3.23" [82]
0.25" [6.3]
Standard:
3/8" to 1/2"
3/8" to 7/16"
Optional
1/2" to 3/4"
w/K6-1
accessory
D
0
1
0
Technical Data LF24(-S) US
P
ower supp
l
y 24 VA
C
± 20% 50
/
60 H
z
24 VDC ± 10%
P
ower consum
p
tio
n
runnin
g
5
W
holdin
g
2.5
W
Transformer sizin
g
7 VA
(
class 2 power source
)
El
ectr
i
ca
l
connect
i
o
n
(LF24-S US has 2 cables
)
3 ft, 18
G
A appliance cabl
e
1/2” conduit connecto
r
Overload protectio
n
electronic throu
g
hout 0 to 95° rotation
A
n
g
le o
f
rotatio
n
max. 95°, ad
j
ust. with mechanical sto
p
Torqu
e
35 in-lb
[
4 Nm
]
Direction of rotatio
n
reversible with cw/ccw mounting
P
osition indicatio
n
visual indicator, 0° to 95
°
(
0° is sprin
g
return position
)
R
unn
i
ng t
i
m
e
mo
t
o
r
< 40 to 75 se
c
(nominal
)
spr
i
n
g
< 25 sec @-4°F to 122°F [-20°C to 50°C
]
< 60 sec @-22°F
[
-30°C
]
H
umidit
y
5 to 95% RH non-condensin
g
A
m
bi
ent temperatur
e
-22°F to 122°F
[
-30°C to 50°C
]
S
torage temperatur
e
-40°F to 176°F [-40°
C
to 80°
C
]
H
ous
i
n
g
NEMA type 2
/
IP54
H
ousin
g
materia
l
zin
c
coa
t
ed
s
t
eel
Ag
ency listin
gs
cULus acc. to UL 873 an
d
C
AN
/CS
A
C
22.2 No. 24-93
N
oise level
(
max
)
runn
i
n
g
< 50 db
(
A
)
s
prin
g
retur
n
62 dB
(
A
)
Servicin
g
m
a
int
e
n
a
n
ce
f
r
ee
Q
uality standar
d
I
SO
9001
Wei
g
h
t
LF
24
LF24-S
3.1 lbs
(
1.40 k
g)
3.2 lbs (1.45 kg)
LF24-
S
US
A
ux
ili
ary sw
i
tc
h
1 x
S
PDT 3A (0.5A)
@
250 VA
C
, UL Approve
d
adjustable 0° to 95° (double insulated
)
M40024 - 05/10 - Subject to change. © Belimo Aircontrols (USA), Inc.