Bard HVAC MC4002 Dual Unit Lead/Lag Controller

The Bard HVAC MC4002 Dual-Unit lead/Lag Controller is to be used in systems that use packaged units such as air conditioners or heat pumps applied. It operates by tracking the operating hours of each unit and then changing which unit is the main unit. This lead/lag operation increases the life of equipment, enhances the reliability of the system by providing backup, and enhances energy utilization by load sharing. Advantages include lower maintenance expenses, fair equipment load, and a stable building conditions. It is applied in commercial and industrial systems where there are several units for large areas.