LM24-3 (-T) US
On-off/ floating point control, non-spring return, direct coupled, 24 V
Torque min. 35 in-lb, for control of damper surfaces up to 8 sq ft.
LM24-3 US LISTED
LM24-3-T US 94D5
TEMP. IND &
REG. EQUIP.
UL
Application
For on-off and floating point control of dampers in HVAC sys-
tems. Actuator sizing should be done in accordance with the
damper manufacturer’s specifications. The actuator mounts
directly to the damper operating shaft with a universal V-bolt
©
clamp assembly.
LM24-3 US LM24-3-T US Operation
The actuator is not provided with and does not require any limit
switches, but is electronically protected against overload. The
angle of rotation is mechanically limited to 95°. When reaching
the damper or actuator end position, the actuator automatically
stops. The gears can be manually disengaged with a button on
the actuator cover. The position of the actuator is indicated by
a visual pointer. The anti-rotation strap supplied with the actua-
tor will prevent lateral movement.
The LM24-3 US and LM24-3-T US actuators use a Brushless
DC motor, which is controlled by an Application Specific
Integrated Circuit (ASIC). The ASIC monitors and controls the
Technical Data LM24… on-off/floating point
actuator’s rotation and provides a digital rotation sensing (DRS)
Power supply 24 VAC ± 20% 50/60 Hz 24 VDC ± 10% function to prevent damage to the actuator in a stall condition.
Power consumption 2W
Transformer sizing 3 VA (Class 2 power source)
D20230 / 5 4 3 2 1 -05/02-10M-EG-Subject to change. © Belimo Aircontrols (USA), Inc.
Electrical connection 3 ft, 18 GA, UL CL2P plenum cable
Overload protection Electronic throughout 0 to 95° rotation
Input impedance 3900Ω
Angle of rotation max 95°, adjust. with mechanical stops
Torque min 35 in-lb [4 Nm], Independent of load
Direction of rotation reversible w/switch CW/CCW
(not on “-T” models) Accessories
Position indication clip-on indicator (not on “-T” models) 11533 T-type anti-rotation bracket
Running time 95 seconds 22065 L-type anti-rotation bracket (included)
ZG-LMSA Shaft adaptor for short shafts
Manual override external push button
Tool-02 8 mm wrench
Humidity 5 to 95% RH, non-condensing
Ambient temperature -22°F to +122°F [-30°C to +50°C]
Dimensions (All numbers in brackets are metric.)
Storage temperature -40°F to +176°F [-40°C to +80°C]
Housing type NEMA type 2 (-T models NEMA 1) 1/4" to 5/8" [6 to 16]
1/4" to 7/16" [6 to 11]
Housing material rating UL94-5V 2.32"
[58.9]
Noise level less than 35 dB (A)
Servicing maintenance free
3.47" [88]
Agency listings UL873 listed, CSA 22.2 No. 24 certified, CE
Quality standard ISO 9001 4.53" [115]
Weight 1.2 lbs [0.55 kg]
1
0
R
L
2.56"
[65]
LM24-3-T.1 US 1.28"
20% 100%
[32.5]
1
Electrical connection Screw terminal (for 26 to 14 GA wire)
0
Housing NEMA type 1 3.68" [93.5]
0.85"
D014
Direction of rotation Reverse wires terminals 2 and 3 [21.5]
116
LM24-3 (-T) US
®
On-off/ floating point control, non-spring return, direct coupled, 24 V
W080
W082
24 VAC Transformer 2 3 24 VAC Transformer 3
1
1
2
Line Blk (1) Common
Line Blk (1) Common
Volts Red (2) + Volts Red (2) +
a
a open Wht (3) +
6 Wht (3) +
a closed
L R CCW CW
The indication of direction
The indication of direction LM24-3 (-T) US is valid for switch position CW. LM24-3 US
is valid for switch position R.
On-off control Floating point or on-off control
W081
1 24 VAC Transformer 5
2 Notes
Line 1 Common
1 Provide overload protection and disconnect as required.
Volts 2 +
2 Actuators may also be powered by 24 VDC.
3 + Actuators are provided with color coded wires. Wire
6 3
numbers are provided for reference.
5 The LM24-3-T US actuators are provided with a num-
LM24-3-T US bered screw terminal strip instead of cable.
Switch wires 2 and 3 to change rotation direction of
6 LM24-3-T US (does not have CW/CCW external switch).
Floating point or on-off control of LM24-3-T US
D20230/ 5 4 3 2 1 -05/02-10M-EG-Subject to change. © Belimo Aircontrols (USA), Inc.
T-Type bracket
These are included in the single-actuator
packages and are available
at no extra cost in the bulk
packages upon request.
LM
L-Type anti-rotation bracket.
Included with
each bulk packaged
actuator. Part
number: 22065
LM24… on-off/floating - Typical Specification:
Control damper actuators shall be electronic direct coupled
Bulk packaging type which require no crank arm and linkage. Actuators shall
be UL and CSA listed, have a 5 year warranty, and be man-
Bulk Pack No. Actuator Type Quantity/Pack ufactured under ISO 9001 International Quality Control
LM24-3.1 US LM24-3 US 32 Standards. Actuators shall have Brushless DC motor tech-
nology. Actuators shall have reversing switch and manual
LM24-3-T.1 US LM24-3-T US 48
override on the cover, and be protected from overload at all
angles of rotation. If required, actuator will be provided with
To have better control of job site inventory and reduce the screw terminal strip for electrical connections (LM24-3-T US).
environmental impact of unnecessary packing material. Actuators shall be as manufactured by Belimo.
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