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82]
LF24 US - Damper Actuator
On/Off, Spring Return, 24 VAC/DC
Technical Data
Power Supply 24 VAC ± 20%, 50/60 Hz, 24 VDC ± 10%
Power Consumption Running 5 W
Power Consumption Holding 2.5 W
Transformer Sizing 7 VA (class 2 power source)
Shaft Diameter 3/8” to 1/2” round, centers on 1/2”
Electrical Connection 3ft [1m], 18 GA appliance cable with 1/2”
conduit connector
Overload Protection electronic throughout 0° to 95° rotation
Electrical Protection actuators are double insulated
Angle of Rotation Max. 95°,
Torque 35 in-lbs [4 Nm] minimum
Direction of Rotation (Motor) reversible with CW/CCW mounting
Direction of Rotation (Fail-Safe) reversible with CW/CCW mounting
Position Indication visual indicator, 0° to 95° (0° is full spring
return position)
Running Time (Motor) <40 to 75 sec
Running Time (Fail-Safe) <25 sec @ -4°F to 122°F [-20°C to 50°C], <
60 sec @ -22°F [-30°C]
Humidity max. 95% RH non-condensing
Ambient Temperature Range -22°F to 122°F [-30°C to 50°C]
Storage Temperature Range -40°F to 176°F [-40°C to 80°C]
Housing NEMA 2, IP54
Housing Material zinc coated steel
Agency Listings† cULus acc. To UL 873 and CAN/CSA C22.2
No. 24-93
Noise Level (Motor) <50 dB (A)
Noise Level (Fail-Safe) <62 dB (A)
Servicing maintenance free
Quality Standard ISO 9001
Weight 3.1 lb [1.4 kg]
†Rated Impulse Voltage 800V, Type of action 1.AA, Control Pollution Degree 3
1395
Torque min. 35 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 from 3/8” up to 1/2” in diameter by means
of its universal clamp, 1/2” shaft centered at delivery. For shafts up to 3/4” use
K6-1 accessory. A crank arm and several mounting brackets are available for
applications where the actuator cannot be direct coupled to the damper shaft.
Operation
The LF 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 consistent torque to the damper with, and without, power applied
to the actuator. The LF 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.
Power consumption is reduced in holding mode. The actuator is double
insulated so an electrical ground connection is not necessary.
Dimensions (Inches[mm])
18.54]
0.73"
[
57.1]
69.6]
3.23" [
2.25" [
2.74" [
98]
3.86" [
0.25"
0.98
6.25]
[
80]
3.15" [
1.69
" [
43] 3.66
" [
25] 4.72
6.1
" [
155]
6.1
" [
155]
" [
93]
3.66
" [
93]
0.26
" [
6.5]
" [
120] 0.39
7.66
" [
194.501]
" [
1.15"
10]
29.3]
[
5.08]
0.2" [
58.42]
2.3" [
24.6]
0.97" [
Date created, 02/16/2017 - Subject to change. © Belimo Aircontrols (USA), Inc.
800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN
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Accessories
Line
V
AV6-20 6.7” shaft extension for 1/4” to 3/4” diameter shafts.
IND-LF LF position indicator.
K6 US Standard LF clamp (3/8” to 1/2”).
K6-1 LF clamp (1/2” to 3/4”).
KG10A Ball joint for 3/8” diameter rod, zinc plated.
KG6 Ball joint for 5/16” diameter rod, zinc plated.
KG8 Ball joint for 5/16” diameter rod, 90°, galvanized steel.
KH12 Univ. crankarm, slot 21/64” w, for 3/4” to 1” dia. shafts.
KH6 Univ. crankarm, slot 1/4” w, for 3/8” to 11/16” dia. shafts.
KH8 Univ. crankarm,slot 21/64” w,for 3/8” to 11/16” dia. shafts.
KH-LF LF crankarm (with 1/2” diameter shaft pass through).
KH-LFV V-bolt Kit for KH-LF.
LF-P Anti-rotation bracket LF.
SH10 Push rod for KG10A ball joint (36” L, 3/8” diameter).
SH8 Push rod for KG6 & KG8 ball joints (36” L, 5/16” diameter).
TOOL-06 8 mm and 10 mm wrench.
ZDB-LF Angle of rotation Limiter for LF.
ZF8-LF 8x8 mm form fit adaptor for LF.
ZG-109 Right angle bracket for ZS-260.
ZG-110 Stand-off bracket for ZS-260.
ZG-112 LF right angle bracket (4-1/2” H x 5-1/2” W x 2-1/2” D).
ZG-DC1 Damper clip for damper blade, 3.5” width.
ZG-DC2 Damper clip for damper blade, 6” width.
ZG-LF112 LF crankarm adaptor kit (includes ZG-112).
ZG-LF2 LF crankarm adaptor kit (T bracket included).
ZG-LMSA-1 Shaft extension for 3/8” diameter shafts (4” L).
ZG-LMSA-1/2-5 Shaft extension for 1/2” diameter shafts (5” L).
ZS-100 Weather shield - galvaneal (13” L x 8” W x 6” D).
ZS-101 Base plate for ZS-100.
ZS-150 Weather shield - PC w/ foam seal (16” L x 8-3/8” W x 4” D).
ZS-260 Explosion proof housing.
ZS-300 NEMA 4X, 304 stainless steel enclosure.
ZS-300-5 NEMA 4X, 316L stainless steel enclosure.
ZS-300-C1 1/2” shaft adaptor, standard wtih ZS-300(-5).
ZS-300-C2 3/4” shaft adaptor for ZS-300(-5).
ZS-300-C3 1” shaft adaptor for ZS-300(-5).
PS-100 Actuator power supply and control simulator.
ZG-X40 120 to 24 VAC, 40 VA transformer.
24 VAC Transformer
olts
On/Off
LF24 US - Damper Actuator
On/Off, Spring Return, 24 VAC/DC
A
1 3
Blk (1) Common
Wht (2) + Hot
11
Typical Specification
On/Off spring return damper actuators shall be direct coupled type which
require no crank arm and linkage and be capable of direct mounting to a
shaft up to a 3/4” diameter and center on a 1/2” shaft (default). Actuator shall
deliver a minimum output torque of 35 in-lbs. The actuator must be designed
so that they may be used for either clockwise or counter clockwise failsafe
operation. Actuators shall be protected from overload at all angles of rotation.
If required, one SPDT auxiliary switch shall be provided with one switch
having the capability of being adjustable. Actuators with auxiliary switch must
be constructed to meet the requirement for Double Insulation so an electrical
ground connection is not required to meet agency listings. Actuators shall be
cULus listed, have a 5 year warranty, and be manufactured under ISO 9001
International Quality Control Standards. Actuators shall be as manufactured
by Belimo.
800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN
Date created, 02/16/2017 - Subject to change. © Belimo Aircontrols (USA), Inc.
Page 3
LF24 US - Damper Actuator
On/Off, Spring Return, 24 VAC/DC
Wiring Diagrams
WARNING! LIVE ELECTRICAL COMPONENTS!
!
During installation, testing, servicing and troubleshooting of this
product, it may be necessary to work with live electrical components.
Have a qualified licensed electrician or other individual who has been
properly trained in handling live electrical components perform these
tasks. Failure to follow all electrical safety precautions when exposed to
live electrical components could result in death or serious injury.
Meets cULus requirements without the need of an electrical ground
connection.
Actuators with appliance cables are numbered.
A
Provide overload protection and disconnect as required.
Actuators may also be powered by 24 VDC.
Actuators may be connected in parallel if not mechanically linked. Power
consumption and input impedance must be observed.
Date created, 02/16/2017 - Subject to change. © Belimo Aircontrols (USA), Inc.
800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN
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