
B3866-S Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $210.00 | Condition is Used, Andover Controls B3866 VAV Controller Belimo LM24-M Damper Actuator BACnet HVAC, shipping cost = $14.10 | 100.0% |

The Belimo B3866-S Andover B3866 VAV Controller with LM24-M Damper Actuator is a sophisticated HVAC control solution designed for building automation systems that use the BACnet communication protocol. This product is a combination of a Variable Air Volume (VAV) controller and a damper actuator, offering both control and actuation functions in a single, compact unit.
The VAV controller is responsible for regulating the airflow and temperature in a zone by modulating the damper position in response to the desired setpoint. The Andover B3866 controller is known for its advanced features and flexibility. It supports various input and output options, including temperature, pressure, and occupancy sensors, as well as multiple communication protocols like Modbus, LonWorks, and BACnet. This versatility allows for seamless integration with other building automation systems and devices.
The LM24-M damper actuator is a critical component of this system, as it translates the controller's electric signal into mechanical movement for the damper. The actuator features a reliable, torque motor design for precise damper positioning, ensuring optimal airflow and temperature control in the zone. The actuator is also equipped with a separate power supply, which ensures uninterrupted operation even if the main power source is lost.
This combination of a VAV controller and damper actuator offers numerous benefits, such as simplified installation, reduced wiring requirements, and improved system efficiency. The B3866-S Andover B3866 VAV Controller with LM24-M Damper Actuator is an ideal solution for applications where precise temperature and airflow control is essential, such as in offices, healthcare facilities, and educational institutions. With its advanced features, reliable performance, and easy integration into BACnet-based building automation systems, this product is a must-have for HVAC professionals and building engineers.
The Belimo B3866-S and Overlok B3866 VAV controller with LM24-M damper actuator, both featuring BACnet communication protocol, are popular choices in the HVAC industry for their energy efficiency and advanced control capabilities. Let's discuss the pros and cons of this system to help you make an informed decision.
Pros:1. Energy efficiency: The VAV (Variable Air Volume) system allows for precise control of the airflow in a space, resulting in significant energy savings. The damper actuator ensures optimal mixing of hot and cold air, reducing the need for excessive heating or cooling.
2. BACnet communication: The use of BACnet protocol enables seamless integration with building automation systems (BAS). This feature simplifies system management, reduces maintenance costs, and allows for centralized control of multiple HVAC components.
3. Advanced control capabilities: The VAV controller and damper actuator offer advanced control features, such as demand-controlled ventilation, which can improve indoor air quality and further reduce energy consumption.
4. Durability and reliability: Belimo and Overlok are well-known brands in the HVAC industry for their high-quality products. These components are designed to withstand harsh environments and provide long-lasting performance.
5. Easy installation: The modular design of the components allows for easy installation and integration into existing HVAC systems.
Cons:1. Cost: The initial investment for this system can be higher compared to simpler, non-BACnet controlled HVAC components.
2. Complexity: The advanced control capabilities and BACnet integration might require a higher level of expertise for installation and maintenance.
3. Potential for compatibility issues: While BACnet is a widely adopted communication protocol, it's essential to ensure compatibility with your existing BAS and HVAC components.
Conclusion:In conclusion, the Belimo B3866-S and Overlok B3866 VAV controller with LM24-M damper actuator offer several advantages, including energy efficiency, advanced control capabilities, and seamless integration with building automation systems. However, they also come with a higher initial investment and potential complexity. If your project requires a high degree of energy efficiency, centralized control, and seamless integration with a building automation system, this system is an excellent choice. Alternatively, if you're working on a budget or prefer a simpler HVAC solution, you might consider alternative options.
Recommendation:Based on the information provided, I would recommend considering the Belimo B3866-S and Overlok B3866 VAV controller with LM24-M damper actuator for projects that prioritize energy efficiency, advanced control capabilities, and seamless integration with building automation systems. Ensure that you have the necessary expertise for installation and maintenance, and consider the potential impact on your budget.
Details:
Original purchase price was around $900. Up for sale: andover controls b3866 vav controller Belimo LM24-M damper actuator bacnet hvac. 100% authentic, carefully sourced, and stored in a smoke-free home. Everything is in great, working condition please see photos for details.
Photos are always of the exact item you'll receive.
specifications maxohvac:
- brand: Belimo
- mpn: B3866-s
- part type: Controller Actuator Hvac Control
- country of origin: United States
seller maxohvac:
- city: kearney, missouri
- # reviews: 2005
- rating: 100.0%
shipping maxohvac:
- class: standard
- carrier: usps
- service: usps ground advantage
- transit: 4-10 days
- type: calculated
payments maxohvac:
- wallet: apple-pay
- credit card: discover
- other
returns maxohvac:
- policy: no returns
offer maxohvac:
- availability: in stock
- price: $210.00
- item condition: Used
- options: ship-to-home
- best offers: true
- started: march 10, 2026
- in stock #: 1
- sold #: 8
general maxohvac:
- category: Business & Industrial > Hvac Refrigeration
Also Viewed:
- EFB24-SR-S: ACTUATOR, Belimo
- FSNF120-S-1: ACTUATOR, Belimo
- B249-DN50: ACTUATOR VALVE, Belimo
- FSAF24A-S: FIRE ACTUATOR, Belimo
- SVKX24: ACTUATOR, Belimo
- LRB120-3: ACTUATOR, Belimo
- EFX24-MFT: ACTUATOR, Belimo
- B312-DN15: ACTUATOR VALVE, Belimo
- B231-NRB24-SR: BALL VALVE ACTUATOR, Belimo
- GMX24-MFTX1: ACTUATOR, Belimo
- AVKB-24-3-FGVL-AVKB24-3: ACTUATOR, Belimo
