Spring Return Fail-Safe, Proportional Damper Control Actuator, Direct Coupled - 24 VAC/DC

Brand:
Belimo
SKU:
LF24-SR-S
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(0)
Q&A:
(0)
Spring Return Fail-Safe, Proportional Damper Control Actuator, Direct Coupled - 24 VAC/DC
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Spring Return Fail-Safe, Proportional Damper Control Actuator, Direct Coupled - 24 VAC/DC

Brand:
Belimo
SKU:
LF24-SR-S
Rating:
(0)
Q&A:
(0)
$319.58 each
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In Stock
Get 11 Tue, Jan 31
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Product Highlights
Torque icon
35 lb-in Torque
Warranty icon
5 Year Warranty
Description
Features:
  • Cut labor costs with (10 min. installation) simple direct coupling. Actuator Centers on 1/2" shaft (K6-1, 3/4" clamp optional).
  • True mechanical spring return - the most reliable failsafe.
  • Mount for clockwise or counterclockwise fail-safe.
  • Easy-to-adjust mechanical stop to limit damper rotation.
  • Check damper position easily with clear position indicator.
  • Don't worry about actuator burn-out. Belimo is overload-proof throughout rotation.
  • Need to change control direction? Do it easily with a simple switch (modulating actuators).
  • Built-in auxiliary switch is easy to use, offers feedback or signal for additional device.
  • Microprocessor-controlled brushless DC motor increases actuator life span and reliability, provides constant running time (modulating actuators). Provided on Basic Models
  • Rugged metal housing withstands rough handling in the mechanical room.
  • 3 ft. cable and conduit connector eases installation.
The LF24-SR-S-20 is used for proportional modulation of dampers and control valves in HVAC systems. The actuator operates in response to a 2 to 10 VDC, or with the addition of a 500W resistor, a 4 to 20 mA control input from an electronic controller or positioner. A 2 to 10 VDC feedback signal is provided for position indication or master-slave applications.

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 LF24-SR-S version is provided with 1 built-in auxiliary switch. This SPDT switch is provided for safety interfacing or signaling, for example, for fan start-up. The switching function is adjustable between 0° and 95°. The auxiliary switch in the LF24-SR-S US is double insulated so an electrical ground in not necessary.
Specs
Fail Safe Mode:

Spring Return

Actuator Type:

Proportional

Power Supply:

24 VAC/DC

Torque:

35 lb-in

Running Time:

150 Seconds (motor)

< 25 Seconds @ 4°F to 122°F (spring)

< 60 Seconds @ -22°F (spring)

Power Consumption:

2.5W (running)

1W (holding)

VA Rating:

5

Ambient Temperature:

-22°F to +122°F

Control Input Values:

2 to 10 VDC, 4 to 20 mA

Auxiliary Switch:

1 SPDT

Manual Override:

None

Direction of Rotation:

Reversible w/ cw/ccw mounting (spring)

Reversible w/ built-in switch (motor)

Warranty:

5 Year

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