Proper Operation of Air Free Lint Filters with Booster Fans
Air Free lint filters do not use compressed air. They are self-cleaning when all of the dryers are turned off. It is important that all of the dryers are turned off every few hours so the lint can fall off of the screen and drop into the lint storage container.
Simultaneously the booster fan must also be turned off to not allow the lint to be drawn up into the screen by the suction of the blower. Properly controlled the booster fan is off when the dryers are off. Results of this procedure are savings in utility cost incurred by the blower operating needlessly.
When a booster fan is used the lint storage container must be rigid. This will keep the lint out of the airflow and re-depositing on the lint screen. If a bag is used for lint storage the bag will be sucked up into the filter re-depositing the lint on the screen.
The airflow entering the Lint Filter must be under a slight positive back pressure. In most cases .12″ w.c. is acceptable for proper dryer operation. If the air is too negative the airflow going across the burner is too great thus lowering inlet temperature going into the load resulting in the burner cycling too often.
The Energenics Air Flow Optimizer is designed to maintain a low positive back pressure and allowing the booster fan to turn off when not required to operate (i.e. when all dryers are off. This allows the lint to be released from the screen and fall into the lint storage container.
If the proper airflow and sequencing of dryer/blower shutdown is not achieved the lint filter will no clean itself. The result is the lint will be pulverized and be allowed to bypass the lint screen.