Purge settings for energy recovery wheels are selected for a fixed design airflow. In systems employing variable volume controls, this can result in contaminant crossover and increased fan power. With the FläktGroup SEMCO Health and Safety Monitor, purge design and wheel operation are optimized to reduce contaminant carry-over and fan power.
The Health and Safety Monitor is designed to ensure the optimum purge efficiency of an energy recovery wheel when installed to operate within a variable air volume system or constant volume, variable pressure system.
By measuring the pressure differential across the purge section, air volume through the recovery wheel or both, the speed of the recovery wheel is modulated to ensure optimum purge efficiency as the airflow pressure through the system changes.
The purge airflow required for effective purge operation is maintained by managing the wheel rotational speed to limit carryover of contaminants from the exhaust to the supply air stream while simultaneously maintaining total recovery efficiency.
The Health and Safety Monitor also features:
