Making Dryer/Drying Hopper Process Air Connections; Drying Hopper Air Trap Considerations - AEC AD Series Operation And Installation Manual

AD15, AD30, AD60 Electrical Schematics
Refer to your Customer Information Packet on actual drawings for
4-5 Making Dryer/Drying Hopper Process Air
Connections
Floor Mount Models
4-6

Drying Hopper Air Trap Considerations

AD Series Dehumidifying Dryers
your specific dryer.
Use high-temperature flexible dryer hose or rigid tubing to
connect the dryer to the drying hopper.
Keep the delivery hose to the drying hopper as short as
possible to minimize heat loss. We strongly recommend
insulated hose for maximum energy savings.
Do not use insulated hose on the return from the drying hopper.
The return air to the blower must be 150°F (66ºC) or below. If
the return air temperature is not below this point, you should
purchase and install the optional aftercooler to remove
excessive heat. Consult AEC, Inc. for more information.
Aftercooler considerations also apply to machine-mount
models.
Make sure that hoses are not kinked or collapsed.
Drying hopper air inlet and outlet locations vary, but always
connect hoses so the dry process air from the dryer enters the
bottom of the drying hopper and flows out the top to return to
the dryer inlet.
AEC's exclusive air trap assembly on the top of the drying hopper
prevents ambient air from contaminating the material being dried.
Keep the material level at the mid point of the air trap for the
dryer to operate efficiency.
Use a hopper loader or vacuum conveying system to maintain
the proper material level.
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