Description
Hoyme inline damper body with Belimo LMB24-3-T 3-wire floating point actuator: the higher-torque companion to the HAC-34 (CMB24-3-T). Same Open / Stop / Close 3-wire control architecture, same holds-last-position behavior on power loss, same 6"–20" size range. The practical distinction is torque: the LMB24-3-T is rated 45 in-lb [5 Nm], about two and a half times the CMB24-3-T's 18 in-lb [2 Nm]. When the spec names LMB24-3-T, this is the product.
⚠ No Spring Return: Holds Last Position on Power Loss
On power loss, the HAC-30 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, use a spring return product: HAC-40 (TFB24) for on/off or HAC-43 (TFB24-SR-T) for modulating.
✓ 3-wire floating point: Open / Stop / Close. DDC controller pulses the Open or Close wire to position the blade incrementally; neither energized = blade holds position
✓ LMB24-3-T: 45 in-lb, higher torque than the 18 in-lb CMB24-3-T. The safer choice for larger sizes and higher static pressure on an actuator-neutral spec
✓ Belimo LMB24-3-T: factory-mounted to Hoyme damper body. Single SKU, ready to install; actuator field-replaceable through Belimo distributors
✓ 24 Vac or 24 Vdc supply: compatible with Johnson Controls, Siemens, Honeywell, Automated Logic, and other BAS platforms with floating point output cards
✓ End switch and heat bypass (-H) available on all sizes: factory-installed; end switch provides definitive position confirmation when blade reaches fully open or fully closed
HAC-30 (LMB24-3-T): this product
✓Spec names LMB24-3-T or is actuator-neutral
✓Larger duct sizes or higher static pressure: 45 in-lb against the CMB24-3-T's 18 in-lb
✓Same LMB actuator family as HAC-60: familiar parts chain
HAC-34 (CMB24-3-T): use instead when…
→Spec names CMB24-3-T specifically
→The compact 18 in-lb actuator is confirmed adequate for the duct size and static pressure
Do not specify -H heat bypass on fresh air intake, make-up air, or ventilation applications. The 10% bypass allows continuous outdoor air infiltration when the damper is at minimum position. Specify -H only for hot air supply duct zone control on single-speed furnace systems.
Control
3-wire floating point: Open / Stop / Close
Fail-Safe
Holds last position, no spring return
Actuator
Belimo LMB24-3-T
Supply Voltage
24 Vac or 24 Vdc
Sizes
6"–20" even inches
Torque
45 in-lb [5 Nm]: confirm for size and pressure
CSA Status
CSA certified up to 12"
Spec calls for CMB24-3-T? Use HAC-34 (CMB24-3-T), same 3-wire floating point architecture, compact 18 in-lb actuator. For line voltage floating point (100–230 Vac) see HAC-35 (CMB120-3). For 2–10 VDC modulating with the LMB actuator family see HAC-60 (LMB24-SR-T).
2-year electrical · 10-year mechanical warranty
Hoyme damper body: Made in Canada · Belimo LMB24-3-T field-replaceable through Belimo distributors
Product image is representative only. Actual product may differ in appearance depending on size, configuration, and options selected at order.
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