Description
Product image is representative only. Actual product may differ in appearance depending on size, configuration, and options selected at order.
Hoyme inline damper body with Belimo LMB24-SR-T modulating actuator. Proportional blade positioning via 2–10 VDC analog signal — same control input as the HAC-43 (TFB24-SR-T). One difference: the LMB24-SR-T has no spring return. On power loss, the blade holds its last position rather than moving to a defined fail-safe state. Sizes 6"–20" in even-inch increments.
⚠ No Spring Return — Holds Last Position on Power Loss
On power loss, the HAC-60 blade stays at its last position — it does not move to a defined open or closed fail-safe position. If your application requires the damper to move to a defined position on power loss — to close and seal the duct, or to open and ensure ventilation — use the HAC-43 (TFB24-SR-T), which provides the same 2–10 VDC modulating control with spring return fail-safe.
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2–10 VDC proportional blade positioning — same control input as HAC-43; blade tracks the analog signal continuously across the full range of travel
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Holds last position on power loss — preferred behavior on most commercial BAS installations; avoids abrupt airflow changes on brief power interruptions while the DDC resumes control
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Belimo LMB24-SR-T — factory-mounted to Hoyme damper body — single SKU, ready to install; actuator field-replaceable through Belimo distributors
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24 Vac or 24 Vdc supply — compatible with BAS and DDC analog output cards; same supply flexibility as HAC-43
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Heat bypass (-H) available on all sizes — factory-installed; for hot air supply duct zone control only; do not specify -H on fresh air or ventilation applications
HAC-60 (LMB24-SR-T) — this product
✓2–10 VDC modulating — holds last position on power loss
✓BAS resumes control after power event — no abrupt airflow change on interruption
✓Holds-last-position is acceptable — DDC manages recovery
✓Lighter actuator torque class — sufficient for smaller and mid-range sizes
HAC-43 (TFB24-SR-T) — use instead when…
→Spring return to defined position required on power loss
→Duct must seal completely if power is lost
→Ventilation must be guaranteed regardless of power state
→Higher torque class needed for larger blade areas
Confirm action code (OPP vs. SPP) with the mechanical engineer or DDC controls designer before ordering. The action code determines the signal-to-blade direction relationship — whether increasing VDC opens or closes the blade must match the BAS control sequence. Confirm with Belimo LMB24-SR-T documentation for the specific configuration required.
Control Input
2–10 VDC analog — proportional
Fail-Safe
Holds last position — no spring return
Actuator
Belimo LMB24-SR-T
Supply Voltage
24 Vac or 24 Vdc
Sizes
6"–20" even inches
End Switch
Not in standard variants — confirm with Hoyme
CSA Status
Confirm with Hoyme before ordering
Need spring return fail-safe with modulating control? Use HAC-43 (TFB24-SR-T) — same 2–10 VDC proportional control, spring return to defined fail-safe position on power loss. If on/off is sufficient for your application, use HAC-40 (TFB24) — less expensive, simpler wiring, spring return included. For 3-wire floating point DDC control see HAC-34 (CMB24-3-T).
2-year electrical · 10-year mechanical warranty
Hoyme damper body — Made in Canada · Belimo LMB24-SR-T field-replaceable through Belimo distributors