The Barber Colman MA-405-500, now under Schneider Electric, is an electric damper actuator designed for two-position (on/off) control in HVAC systems. Equipped with a spring return mechanism, it ensures dampers revert to their default position upon power loss, enhancing system reliability.
Technical Specifications
- Model: MA-405-500
- Type: Electric Damper Actuator
- Control Signal: Two-position (On/Off)
- Power Input Voltage: 120 VAC
- Power Consumption: 48 watts
- Torque Output: 16 lb-in (1.8 N-m)
- Shaft Rotation: 180° clockwise upon energization; counterclockwise spring return when de-energized
- Auxiliary Switch: Single-Pole, Double-Throw (SPDT) switch that actuates at the powered end of the stroke
- Ambient Temperature Limits: -40°F to 136°F (-40°C to 58°C)
- Humidity Range: 5% to 95% RH, non-condensing
- Housing: Rugged die-cast aluminum with two 1/2-inch conduit openings
- Mounting: Versatile positioning; upright orientation preferred
Key Features
- Reliable Two-Position Control: Provides consistent on/off damper operation
- Spring Return Mechanism: Ensures dampers return to their default position during power interruptions
- Integrated Auxiliary Switch: Facilitates additional control functions or feedback mechanisms
- Durable Construction: Die-cast aluminum housing enhances longevity and performance
- Flexible Mounting Options: Suitable for various installation positions to accommodate system requirements
Compatible Components & Accessories
- Crank Arms: AM-113 (for 1/2-inch diameter damper shafts)
- Linkage Connectors: AM-122 (straight type), AM-132 (ball joint connector)
- Damper Rods: AM-125 (5/16-inch diameter x 20 inches), AM-125-048 (5/16-inch diameter x 48 inches)
- Mounting Brackets: AM-301 (90-degree mounting bracket)
- Gasket Kit: AM-363 for NEMA 4 rated applications
Industry Applications
- HVAC Systems: Ideal for controlling airflow in heating, ventilation, and air conditioning systems
- Building Automation: Integrates with automated control systems for efficient building management
- Industrial Ventilation: Suitable for managing airflow in industrial environments requiring robust actuator performance
Installation & Maintenance Notes
- Wiring: Ensure compliance with national and local electrical codes; use appropriate wire gauges based on run length and voltage
- Mounting: While the actuator can be mounted in various positions, the upright orientation is preferred for optimal performance
- Adjustment: The auxiliary switch operating point can be modified by inserting a screwdriver through the top plate opening and turning the gear-like plastic disc; each click represents approximately a 3-degree change in operating point
- Inspection: Regularly check for signs of wear, oil leaks, or electrical issues; maintain oil levels using TAC immersion oil as specified
- Safety Precautions: Disconnect power before installation or maintenance; never attempt to turn the actuator shaft manually with a wrench or crank to avoid gear damage
The Barber Colman (Schneider Electric) MA-405-500 electric damper actuator offers dependable two-position control for various HVAC applications, ensuring precise airflow regulation and contributing to overall system efficiency.
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