Conventional enthalpy control of economizers often misses a significant energy conservation opportunity. The control circuit suggested in this video maintains the same occupied space temperature while reducing the percentage operating time of mechanical cooling. By increasing the the off time while maintaining identical compressor run time, the system achieves meaningful energy savings without compromising occupant comfort.
DX Cooling Opportunity
HVAC systems that mix fresh air and building return air to varying quantities for cooling purposes often have control logic comparing the total heat content of the outdoor to the total heat content of the return air.