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MC4001-B OBSOLETE
- BARD LEAD LAG CONTROLLER WITH ENHANCED ALARM BOARD
The Bard MC4001-B is an OEM solid state dual unit lead lag controller with an enhanced alarm board, used to automatically alternate two Bard wall mount air conditioners for balanced run time while maintaining reliable temperature control in telecom and equipment shelter applications. This controller helps coordinate staging and changeover between the lead and lag units, monitors operating conditions through its alarm functions, and supports straightforward field wiring with standard low voltage power from the connected equipment. If you are replacing a failed controller or upgrading an older lead lag setup, confirm the exact controller series and wiring requirements in the unit documentation to ensure proper compatibility and restore correct unit rotation and alarm reporting.
Official replacement(s):
MC4002-B
- DUAL UNIT LEAD-LAG CONTROLLER W/ ALARM BOARD B