Bard HVAC MC4002-B Control

The Bard HVAC MC4002-B is a professional-grade Advanced Solid State Dual Unit Lead/Lag Controller engineered for critical infrastructure supporting two wall-mount HVAC units. This direct replacement for MC4000-B and MC4001-B balances runtime across both systems while ensuring 100% redundancy in telecom shelters, equipment rooms, and data centers. Equipped with an Enhanced Alarm Board, the MC4002-B utilizes Form C dry contact alarm relays (NO and NC) to integrate with building management systems, providing real-time alerts for refrigeration failure, power loss, and high/low temperature events.

Designed for versatile 2-stage cooling control, this controller is compatible with systems utilizing economizers, 2-stage compressors, or dual compressor configurations. It features a digital LCD display for temperature monitoring and on-site programming without the need for external tools. Field-selectable parameters include stage differentials, lead/lag rotation intervals, and dehumidification control logic when paired with an optional humidity sensor. The rugged 18 to 24V solid-state architecture ensures stable HVAC automation and equipment longevity in demanding industrial environments.

• Dual Unit Redundancy: Automatically rotates lead/lag positions to balance compressor hours and provide backup cooling during peak demand.
• Enhanced Alarm Integration: Form C relays allow for precise remote monitoring of critical HVAC system faults and environmental conditions.
• Multi-Stage Compatibility: Supports up to four stages of cooling and heating, specifically optimized for Bard units with or without economizers.
• Industrial Durability: Solid-state construction eliminates mechanical wear, while the programmable digital display offers precise setpoint management.
• Simplified Retrofit: Engineered as a drop-in replacement for MC4000-B and MC4001-B models, utilizing existing low-voltage field wiring.

Is the MC4002-B compatible with heat pump systems?
Yes, the Bard MC4002-B controller can be field-configured for heat pump applications, allowing for up to four stages of heating control across both units.

Does this controller support remote communication?
While the MC4002-B includes an enhanced alarm board, it requires an optional 8612-047 CB5000 communication board for Ethernet and SNMP monitoring capabilities.

How does the lead/lag rotation function work?
Technicians can program the rotation interval to switch the lead unit based on time or demand, ensuring that wear is evenly distributed between the two primary HVAC systems.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.