Belimo LM24A-SR-F non‑fail‑safe rotary damper actuator for HVAC air dampers up to about 1 m². Used unit with mounting bracket and cable, suitable as a replacement actuator or spare for existing installations.
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Brand: Belimo
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Model: LM24A-SR-F (printed on housing)
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Type: Modulating rotary damper actuator for HVAC applicationsbelimo+1
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Torque: 5 Nm nominal torquebelimo+1
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Nominal voltage: AC/DC 24 V, 50/60 Hzcovent+1
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Control signal: Modulating DC 2…10 V input (Y), position feedback DC 2…10 V (U)belimo+1
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Running time: Approx. 150 s for 90–95° rotationi-acs+2
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Mechanical interface: Form‑fit for 8×8 mm damper shaft, with metal mounting bracket and position scalebelimo+1
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Protection rating: NEMA2 / IP54 (printed on label)belimo+1
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Electrical connection: Factory cable with 5‑core wiring and terminal marking (1‑2‑3‑5) as shown on connector diagram.
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Typical use: Control of air dampers in building ventilation, heating, and air‑conditioning systems.
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Full technical data: See Belimo technical datasheet and housing label for complete specifications.covent+1
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Used, removed from a working HVAC installation.
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Visible cosmetic wear on metal mounting bracket (surface rust, marks) and light scratches/marks on orange housing.
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Cable insulation shows normal use; connector block appears intact (see photos).
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No way to test in‑house; actuator is sold untested, as‑is, for spare parts or refurbishment.
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This is a non‑fail‑safe actuator (no spring return); it is intended for systems where controlled modulation is required rather than automatic return on power loss.belimo+1
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Buyer must verify compatibility with damper shaft size (8×8 mm), supply voltage (AC/DC 24 V), and control signal (2–10 V) before installation.
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Professional installation is recommended; ensure correct wiring according to Belimo documentation and local electrical codes.
