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The Bard 8602-002BX enthalpy control (boxed) is an OEM economizer control used on Bard wall mounted HVAC systems to help determine when outdoor air conditions are suitable for free cooling, supporting proper outside air operation and reducing unnecessary mechanical cooling when conditions allow. This control works with the economizer sequence by using enthalpy based decision logic to help maintain comfort while protecting system operation under varying temperature and humidity conditions. For best results, confirm your unit model and economizer option match this exact Bard 8602-002BX part number before ordering.
Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.
A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.
Example: 8406-142BX is physically identical to 8406-142.